--- /dev/null
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package message
+
+import (
+ "bytes"
+ "fmt"
+ "io"
+ "math"
+ "reflect"
+ "runtime"
+ "strings"
+ "testing"
+ "time"
+
+ "golang.org/x/text/language"
+)
+
+type (
+ renamedBool bool
+ renamedInt int
+ renamedInt8 int8
+ renamedInt16 int16
+ renamedInt32 int32
+ renamedInt64 int64
+ renamedUint uint
+ renamedUint8 uint8
+ renamedUint16 uint16
+ renamedUint32 uint32
+ renamedUint64 uint64
+ renamedUintptr uintptr
+ renamedString string
+ renamedBytes []byte
+ renamedFloat32 float32
+ renamedFloat64 float64
+ renamedComplex64 complex64
+ renamedComplex128 complex128
+)
+
+func TestFmtInterface(t *testing.T) {
+ p := NewPrinter(language.Und)
+ var i1 interface{}
+ i1 = "abc"
+ s := p.Sprintf("%s", i1)
+ if s != "abc" {
+ t.Errorf(`Sprintf("%%s", empty("abc")) = %q want %q`, s, "abc")
+ }
+}
+
+var (
+ NaN = math.NaN()
+ posInf = math.Inf(1)
+ negInf = math.Inf(-1)
+
+ intVar = 0
+
+ array = [5]int{1, 2, 3, 4, 5}
+ iarray = [4]interface{}{1, "hello", 2.5, nil}
+ slice = array[:]
+ islice = iarray[:]
+)
+
+type A struct {
+ i int
+ j uint
+ s string
+ x []int
+}
+
+type I int
+
+func (i I) String() string {
+ p := NewPrinter(language.Und)
+ return p.Sprintf("<%d>", int(i))
+}
+
+type B struct {
+ I I
+ j int
+}
+
+type C struct {
+ i int
+ B
+}
+
+type F int
+
+func (f F) Format(s fmt.State, c rune) {
+ p := NewPrinter(language.Und)
+ p.Fprintf(s, "<%c=F(%d)>", c, int(f))
+}
+
+type G int
+
+func (g G) GoString() string {
+ p := NewPrinter(language.Und)
+ return p.Sprintf("GoString(%d)", int(g))
+}
+
+type S struct {
+ F F // a struct field that Formats
+ G G // a struct field that GoStrings
+}
+
+type SI struct {
+ I interface{}
+}
+
+// P is a type with a String method with pointer receiver for testing %p.
+type P int
+
+var pValue P
+
+func (p *P) String() string {
+ return "String(p)"
+}
+
+var barray = [5]renamedUint8{1, 2, 3, 4, 5}
+var bslice = barray[:]
+
+type byteStringer byte
+
+func (byteStringer) String() string {
+ return "X"
+}
+
+var byteStringerSlice = []byteStringer{'h', 'e', 'l', 'l', 'o'}
+
+type byteFormatter byte
+
+func (byteFormatter) Format(f fmt.State, _ rune) {
+ p := NewPrinter(language.Und)
+ p.Fprint(f, "X")
+}
+
+var byteFormatterSlice = []byteFormatter{'h', 'e', 'l', 'l', 'o'}
+
+var fmtTests = []struct {
+ fmt string
+ val interface{}
+ out string
+}{
+ // The behavior of the following tests differs from that of the fmt package.
+
+ // Unlike with the fmt package, it is okay to have extra arguments for
+ // strings without format parameters. This is because it is impossible to
+ // distinguish between reordered or ordered format strings in this case.
+ // (For reordered format strings it is okay to not use arguments.)
+ {"", nil, ""},
+ {"", 2, ""},
+ {"no args", "hello", "no args"},
+
+ {"%017091901790959340919092959340919017929593813360", 0, "%!(NOVERB)"},
+ {"%184467440737095516170v", 0, "%!(NOVERB)"},
+ // Extra argument errors should format without flags set.
+ {"%010.2", "12345", "%!(NOVERB)"},
+
+ // Some key other differences, asides from localized values:
+ // - NaN values should not use affixes; so no signs (CLDR requirement)
+ // - Infinity uses patterns, so signs may be different (CLDR requirement)
+ // - The # flag is used to disable localization.
+
+ // All following tests are analogous to those of the fmt package, but with
+ // localized numbers when appropriate.
+ {"%d", 12345, "12,345"},
+ {"%v", 12345, "12,345"},
+ {"%t", true, "true"},
+
+ // basic string
+ {"%s", "abc", "abc"},
+ {"%q", "abc", `"abc"`},
+ {"%x", "abc", "616263"},
+ {"%x", "\xff\xf0\x0f\xff", "fff00fff"},
+ {"%X", "\xff\xf0\x0f\xff", "FFF00FFF"},
+ {"%x", "", ""},
+ {"% x", "", ""},
+ {"%#x", "", ""},
+ {"%# x", "", ""},
+ {"%x", "xyz", "78797a"},
+ {"%X", "xyz", "78797A"},
+ {"% x", "xyz", "78 79 7a"},
+ {"% X", "xyz", "78 79 7A"},
+ {"%#x", "xyz", "0x78797a"},
+ {"%#X", "xyz", "0X78797A"},
+ {"%# x", "xyz", "0x78 0x79 0x7a"},
+ {"%# X", "xyz", "0X78 0X79 0X7A"},
+
+ // basic bytes
+ {"%s", []byte("abc"), "abc"},
+ {"%s", [3]byte{'a', 'b', 'c'}, "abc"},
+ {"%s", &[3]byte{'a', 'b', 'c'}, "&abc"},
+ {"%q", []byte("abc"), `"abc"`},
+ {"%x", []byte("abc"), "616263"},
+ {"%x", []byte("\xff\xf0\x0f\xff"), "fff00fff"},
+ {"%X", []byte("\xff\xf0\x0f\xff"), "FFF00FFF"},
+ {"%x", []byte(""), ""},
+ {"% x", []byte(""), ""},
+ {"%#x", []byte(""), ""},
+ {"%# x", []byte(""), ""},
+ {"%x", []byte("xyz"), "78797a"},
+ {"%X", []byte("xyz"), "78797A"},
+ {"% x", []byte("xyz"), "78 79 7a"},
+ {"% X", []byte("xyz"), "78 79 7A"},
+ {"%#x", []byte("xyz"), "0x78797a"},
+ {"%#X", []byte("xyz"), "0X78797A"},
+ {"%# x", []byte("xyz"), "0x78 0x79 0x7a"},
+ {"%# X", []byte("xyz"), "0X78 0X79 0X7A"},
+
+ // escaped strings
+ {"%q", "", `""`},
+ {"%#q", "", "``"},
+ {"%q", "\"", `"\""`},
+ {"%#q", "\"", "`\"`"},
+ {"%q", "`", `"` + "`" + `"`},
+ {"%#q", "`", `"` + "`" + `"`},
+ {"%q", "\n", `"\n"`},
+ {"%#q", "\n", `"\n"`},
+ {"%q", `\n`, `"\\n"`},
+ {"%#q", `\n`, "`\\n`"},
+ {"%q", "abc", `"abc"`},
+ {"%#q", "abc", "`abc`"},
+ {"%q", "日本語", `"日本語"`},
+ {"%+q", "日本語", `"\u65e5\u672c\u8a9e"`},
+ {"%#q", "日本語", "`日本語`"},
+ {"%#+q", "日本語", "`日本語`"},
+ {"%q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`},
+ {"%+q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`},
+ {"%#q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`},
+ {"%#+q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`},
+ {"%q", "☺", `"☺"`},
+ {"% q", "☺", `"☺"`}, // The space modifier should have no effect.
+ {"%+q", "☺", `"\u263a"`},
+ {"%#q", "☺", "`☺`"},
+ {"%#+q", "☺", "`☺`"},
+ {"%10q", "⌘", ` "⌘"`},
+ {"%+10q", "⌘", ` "\u2318"`},
+ {"%-10q", "⌘", `"⌘" `},
+ {"%+-10q", "⌘", `"\u2318" `},
+ {"%010q", "⌘", `0000000"⌘"`},
+ {"%+010q", "⌘", `00"\u2318"`},
+ {"%-010q", "⌘", `"⌘" `}, // 0 has no effect when - is present.
+ {"%+-010q", "⌘", `"\u2318" `},
+ {"%#8q", "\n", ` "\n"`},
+ {"%#+8q", "\r", ` "\r"`},
+ {"%#-8q", "\t", "` ` "},
+ {"%#+-8q", "\b", `"\b" `},
+ {"%q", "abc\xffdef", `"abc\xffdef"`},
+ {"%+q", "abc\xffdef", `"abc\xffdef"`},
+ {"%#q", "abc\xffdef", `"abc\xffdef"`},
+ {"%#+q", "abc\xffdef", `"abc\xffdef"`},
+ // Runes that are not printable.
+ {"%q", "\U0010ffff", `"\U0010ffff"`},
+ {"%+q", "\U0010ffff", `"\U0010ffff"`},
+ {"%#q", "\U0010ffff", "``"},
+ {"%#+q", "\U0010ffff", "``"},
+ // Runes that are not valid.
+ {"%q", string(0x110000), `"�"`},
+ {"%+q", string(0x110000), `"\ufffd"`},
+ {"%#q", string(0x110000), "`�`"},
+ {"%#+q", string(0x110000), "`�`"},
+
+ // characters
+ {"%c", uint('x'), "x"},
+ {"%c", 0xe4, "ä"},
+ {"%c", 0x672c, "本"},
+ {"%c", '日', "日"},
+ {"%.0c", '⌘', "⌘"}, // Specifying precision should have no effect.
+ {"%3c", '⌘', " ⌘"},
+ {"%-3c", '⌘', "⌘ "},
+ // Runes that are not printable.
+ {"%c", '\U00000e00', "\u0e00"},
+ {"%c", '\U0010ffff', "\U0010ffff"},
+ // Runes that are not valid.
+ {"%c", -1, "�"},
+ {"%c", 0xDC80, "�"},
+ {"%c", rune(0x110000), "�"},
+ {"%c", int64(0xFFFFFFFFF), "�"},
+ {"%c", uint64(0xFFFFFFFFF), "�"},
+
+ // escaped characters
+ {"%q", uint(0), `'\x00'`},
+ {"%+q", uint(0), `'\x00'`},
+ {"%q", '"', `'"'`},
+ {"%+q", '"', `'"'`},
+ {"%q", '\'', `'\''`},
+ {"%+q", '\'', `'\''`},
+ {"%q", '`', "'`'"},
+ {"%+q", '`', "'`'"},
+ {"%q", 'x', `'x'`},
+ {"%+q", 'x', `'x'`},
+ {"%q", 'ÿ', `'ÿ'`},
+ {"%+q", 'ÿ', `'\u00ff'`},
+ {"%q", '\n', `'\n'`},
+ {"%+q", '\n', `'\n'`},
+ {"%q", '☺', `'☺'`},
+ {"%+q", '☺', `'\u263a'`},
+ {"% q", '☺', `'☺'`}, // The space modifier should have no effect.
+ {"%.0q", '☺', `'☺'`}, // Specifying precision should have no effect.
+ {"%10q", '⌘', ` '⌘'`},
+ {"%+10q", '⌘', ` '\u2318'`},
+ {"%-10q", '⌘', `'⌘' `},
+ {"%+-10q", '⌘', `'\u2318' `},
+ {"%010q", '⌘', `0000000'⌘'`},
+ {"%+010q", '⌘', `00'\u2318'`},
+ {"%-010q", '⌘', `'⌘' `}, // 0 has no effect when - is present.
+ {"%+-010q", '⌘', `'\u2318' `},
+ // Runes that are not printable.
+ {"%q", '\U00000e00', `'\u0e00'`},
+ {"%q", '\U0010ffff', `'\U0010ffff'`},
+ // Runes that are not valid.
+ {"%q", int32(-1), "%!q(int32=-1)"},
+ {"%q", 0xDC80, `'�'`},
+ {"%q", rune(0x110000), "%!q(int32=1,114,112)"},
+ {"%q", int64(0xFFFFFFFFF), "%!q(int64=68,719,476,735)"},
+ {"%q", uint64(0xFFFFFFFFF), "%!q(uint64=68,719,476,735)"},
+
+ // width
+ {"%5s", "abc", " abc"},
+ {"%2s", "\u263a", " ☺"},
+ {"%-5s", "abc", "abc "},
+ {"%-8q", "abc", `"abc" `},
+ {"%05s", "abc", "00abc"},
+ {"%08q", "abc", `000"abc"`},
+ {"%5s", "abcdefghijklmnopqrstuvwxyz", "abcdefghijklmnopqrstuvwxyz"},
+ {"%.5s", "abcdefghijklmnopqrstuvwxyz", "abcde"},
+ {"%.0s", "日本語日本語", ""},
+ {"%.5s", "日本語日本語", "日本語日本"},
+ {"%.10s", "日本語日本語", "日本語日本語"},
+ {"%.5s", []byte("日本語日本語"), "日本語日本"},
+ {"%.5q", "abcdefghijklmnopqrstuvwxyz", `"abcde"`},
+ {"%.5x", "abcdefghijklmnopqrstuvwxyz", "6162636465"},
+ {"%.5q", []byte("abcdefghijklmnopqrstuvwxyz"), `"abcde"`},
+ {"%.5x", []byte("abcdefghijklmnopqrstuvwxyz"), "6162636465"},
+ {"%.3q", "日本語日本語", `"日本語"`},
+ {"%.3q", []byte("日本語日本語"), `"日本語"`},
+ {"%.1q", "日本語", `"日"`},
+ {"%.1q", []byte("日本語"), `"日"`},
+ {"%.1x", "日本語", "e6"},
+ {"%.1X", []byte("日本語"), "E6"},
+ {"%10.1q", "日本語日本語", ` "日"`},
+ {"%10v", nil, " <nil>"},
+ {"%-10v", nil, "<nil> "},
+
+ // integers
+ {"%d", uint(12345), "12,345"},
+ {"%d", int(-12345), "-12,345"},
+ {"%d", ^uint8(0), "255"},
+ {"%d", ^uint16(0), "65,535"},
+ {"%d", ^uint32(0), "4,294,967,295"},
+ {"%d", ^uint64(0), "18,446,744,073,709,551,615"},
+ {"%d", int8(-1 << 7), "-128"},
+ {"%d", int16(-1 << 15), "-32,768"},
+ {"%d", int32(-1 << 31), "-2,147,483,648"},
+ {"%d", int64(-1 << 63), "-9,223,372,036,854,775,808"},
+ {"%.d", 0, ""},
+ {"%.0d", 0, ""},
+ {"%6.0d", 0, " "},
+ {"%06.0d", 0, " "},
+ {"% d", 12345, " 12,345"},
+ {"%+d", 12345, "+12,345"},
+ {"%+d", -12345, "-12,345"},
+ {"%b", 7, "111"},
+ {"%b", -6, "-110"},
+ {"%b", ^uint32(0), "11111111111111111111111111111111"},
+ {"%b", ^uint64(0), "1111111111111111111111111111111111111111111111111111111111111111"},
+ {"%b", int64(-1 << 63), zeroFill("-1", 63, "")},
+ {"%o", 01234, "1234"},
+ {"%#o", 01234, "01234"},
+ {"%o", ^uint32(0), "37777777777"},
+ {"%o", ^uint64(0), "1777777777777777777777"},
+ {"%#X", 0, "0X0"},
+ {"%x", 0x12abcdef, "12abcdef"},
+ {"%X", 0x12abcdef, "12ABCDEF"},
+ {"%x", ^uint32(0), "ffffffff"},
+ {"%X", ^uint64(0), "FFFFFFFFFFFFFFFF"},
+ {"%.20b", 7, "00000000000000000111"},
+ {"%10d", 12345, " 12,345"},
+ {"%10d", -12345, " -12,345"},
+ {"%+10d", 12345, " +12,345"},
+ {"%010d", 12345, "0,000,012,345"},
+ {"%010d", -12345, "-0,000,012,345"},
+ {"%20.8d", 1234, " 00,001,234"},
+ {"%20.8d", -1234, " -00,001,234"},
+ {"%020.8d", 1234, " 00,001,234"},
+ {"%020.8d", -1234, " -00,001,234"},
+ {"%-20.8d", 1234, "00,001,234 "},
+ {"%-20.8d", -1234, "-00,001,234 "},
+ {"%-#20.8x", 0x1234abc, "0x01234abc "},
+ {"%-#20.8X", 0x1234abc, "0X01234ABC "},
+ {"%-#20.8o", 01234, "00001234 "},
+
+ // Test correct f.intbuf overflow checks.
+ {"%068d", 1, "00," + strings.Repeat("000,", 21) + "001"},
+ {"%068d", -1, "-00," + strings.Repeat("000,", 21) + "001"},
+ {"%#.68x", 42, zeroFill("0x", 68, "2a")},
+ {"%.68d", -42, "-00," + strings.Repeat("000,", 21) + "042"},
+ {"%+.68d", 42, "+00," + strings.Repeat("000,", 21) + "042"},
+ {"% .68d", 42, " 00," + strings.Repeat("000,", 21) + "042"},
+ {"% +.68d", 42, "+00," + strings.Repeat("000,", 21) + "042"},
+
+ // unicode format
+ {"%U", 0, "U+0000"},
+ {"%U", -1, "U+FFFFFFFFFFFFFFFF"},
+ {"%U", '\n', `U+000A`},
+ {"%#U", '\n', `U+000A`},
+ {"%+U", 'x', `U+0078`}, // Plus flag should have no effect.
+ {"%# U", 'x', `U+0078 'x'`}, // Space flag should have no effect.
+ {"%#.2U", 'x', `U+0078 'x'`}, // Precisions below 4 should print 4 digits.
+ {"%U", '\u263a', `U+263A`},
+ {"%#U", '\u263a', `U+263A '☺'`},
+ {"%U", '\U0001D6C2', `U+1D6C2`},
+ {"%#U", '\U0001D6C2', `U+1D6C2 '𝛂'`},
+ {"%#14.6U", '⌘', " U+002318 '⌘'"},
+ {"%#-14.6U", '⌘', "U+002318 '⌘' "},
+ {"%#014.6U", '⌘', " U+002318 '⌘'"},
+ {"%#-014.6U", '⌘', "U+002318 '⌘' "},
+ {"%.68U", uint(42), zeroFill("U+", 68, "2A")},
+ {"%#.68U", '日', zeroFill("U+", 68, "65E5") + " '日'"},
+
+ // floats
+ {"%+.3e", 0.0, "+0.000\u202f×\u202f10⁰⁰"},
+ {"%+.3e", 1.0, "+1.000\u202f×\u202f10⁰⁰"},
+ {"%+.3f", -1.0, "-1.000"},
+ {"%+.3F", -1.0, "-1.000"},
+ {"%+.3F", float32(-1.0), "-1.000"},
+ {"%+07.2f", 1.0, "+001.00"},
+ {"%+07.2f", -1.0, "-001.00"},
+ {"%-07.2f", 1.0, "1.00 "},
+ {"%-07.2f", -1.0, "-1.00 "},
+ {"%+-07.2f", 1.0, "+1.00 "},
+ {"%+-07.2f", -1.0, "-1.00 "},
+ {"%-+07.2f", 1.0, "+1.00 "},
+ {"%-+07.2f", -1.0, "-1.00 "},
+ {"%+10.2f", +1.0, " +1.00"},
+ {"%+10.2f", -1.0, " -1.00"},
+ {"% .3E", -1.0, "-1.000\u202f×\u202f10⁰⁰"},
+ {"% .3e", 1.0, " 1.000\u202f×\u202f10⁰⁰"},
+ {"%+.3g", 0.0, "+0"},
+ {"%+.3g", 1.0, "+1"},
+ {"%+.3g", -1.0, "-1"},
+ {"% .3g", -1.0, "-1"},
+ {"% .3g", 1.0, " 1"},
+ {"%b", float32(1.0), "8388608p-23"},
+ {"%b", 1.0, "4503599627370496p-52"},
+ // Test sharp flag used with floats.
+ {"%#g", 1e-323, "1.00000e-323"},
+ {"%#g", -1.0, "-1.00000"},
+ {"%#g", 1.1, "1.10000"},
+ {"%#g", 123456.0, "123456."},
+ {"%#g", 1234567.0, "1.234567e+06"},
+ {"%#g", 1230000.0, "1.23000e+06"},
+ {"%#g", 1000000.0, "1.00000e+06"},
+ {"%#.0f", 1.0, "1."},
+ {"%#.0e", 1.0, "1.e+00"},
+ {"%#.0g", 1.0, "1."},
+ {"%#.0g", 1100000.0, "1.e+06"},
+ {"%#.4f", 1.0, "1.0000"},
+ {"%#.4e", 1.0, "1.0000e+00"},
+ {"%#.4g", 1.0, "1.000"},
+ {"%#.4g", 100000.0, "1.000e+05"},
+ {"%#.0f", 123.0, "123."},
+ {"%#.0e", 123.0, "1.e+02"},
+ {"%#.0g", 123.0, "1.e+02"},
+ {"%#.4f", 123.0, "123.0000"},
+ {"%#.4e", 123.0, "1.2300e+02"},
+ {"%#.4g", 123.0, "123.0"},
+ {"%#.4g", 123000.0, "1.230e+05"},
+ {"%#9.4g", 1.0, " 1.000"},
+ // The sharp flag has no effect for binary float format.
+ {"%#b", 1.0, "4503599627370496p-52"},
+ // Precision has no effect for binary float format.
+ {"%.4b", float32(1.0), "8388608p-23"},
+ {"%.4b", -1.0, "-4503599627370496p-52"},
+ // Test correct f.intbuf boundary checks.
+ {"%.68f", 1.0, zeroFill("1.", 68, "")},
+ {"%.68f", -1.0, zeroFill("-1.", 68, "")},
+ // float infinites and NaNs
+ {"%f", posInf, "∞"},
+ {"%.1f", negInf, "-∞"},
+ {"% f", NaN, "NaN"},
+ {"%20f", posInf, " ∞"},
+ {"% 20F", posInf, " ∞"},
+ {"% 20e", negInf, " -∞"},
+ {"%+20E", negInf, " -∞"},
+ {"% +20g", negInf, " -∞"},
+ {"%+-20G", posInf, "+∞ "},
+ {"%20e", NaN, " NaN"},
+ {"% +20E", NaN, " NaN"},
+ {"% -20g", NaN, "NaN "},
+ {"%+-20G", NaN, "NaN "},
+ // Zero padding does not apply to infinities and NaN.
+ {"%+020e", posInf, " +∞"},
+ {"%-020f", negInf, "-∞ "},
+ {"%-020E", NaN, "NaN "},
+
+ // complex values
+ {"%.f", 0i, "(0+0i)"},
+ {"% .f", 0i, "( 0+0i)"},
+ {"%+.f", 0i, "(+0+0i)"},
+ {"% +.f", 0i, "(+0+0i)"},
+ {"%+.3e", 0i, "(+0.000\u202f×\u202f10⁰⁰+0.000\u202f×\u202f10⁰⁰i)"},
+ {"%+.3f", 0i, "(+0.000+0.000i)"},
+ {"%+.3g", 0i, "(+0+0i)"},
+ {"%+.3e", 1 + 2i, "(+1.000\u202f×\u202f10⁰⁰+2.000\u202f×\u202f10⁰⁰i)"},
+ {"%+.3f", 1 + 2i, "(+1.000+2.000i)"},
+ {"%+.3g", 1 + 2i, "(+1+2i)"},
+ {"%.3e", 0i, "(0.000\u202f×\u202f10⁰⁰+0.000\u202f×\u202f10⁰⁰i)"},
+ {"%.3f", 0i, "(0.000+0.000i)"},
+ {"%.3F", 0i, "(0.000+0.000i)"},
+ {"%.3F", complex64(0i), "(0.000+0.000i)"},
+ {"%.3g", 0i, "(0+0i)"},
+ {"%.3e", 1 + 2i, "(1.000\u202f×\u202f10⁰⁰+2.000\u202f×\u202f10⁰⁰i)"},
+ {"%.3f", 1 + 2i, "(1.000+2.000i)"},
+ {"%.3g", 1 + 2i, "(1+2i)"},
+ {"%.3e", -1 - 2i, "(-1.000\u202f×\u202f10⁰⁰-2.000\u202f×\u202f10⁰⁰i)"},
+ {"%.3f", -1 - 2i, "(-1.000-2.000i)"},
+ {"%.3g", -1 - 2i, "(-1-2i)"},
+ {"% .3E", -1 - 2i, "(-1.000\u202f×\u202f10⁰⁰-2.000\u202f×\u202f10⁰⁰i)"},
+ {"%+.3g", 1 + 2i, "(+1+2i)"},
+ {"%+.3g", complex64(1 + 2i), "(+1+2i)"},
+ {"%#g", 1 + 2i, "(1.00000+2.00000i)"},
+ {"%#g", 123456 + 789012i, "(123456.+789012.i)"},
+ {"%#g", 1e-10i, "(0.00000+1.00000e-10i)"},
+ {"%#g", -1e10 - 1.11e100i, "(-1.00000e+10-1.11000e+100i)"},
+ {"%#.0f", 1.23 + 1.0i, "(1.+1.i)"},
+ {"%#.0e", 1.23 + 1.0i, "(1.e+00+1.e+00i)"},
+ {"%#.0g", 1.23 + 1.0i, "(1.+1.i)"},
+ {"%#.0g", 0 + 100000i, "(0.+1.e+05i)"},
+ {"%#.0g", 1230000 + 0i, "(1.e+06+0.i)"},
+ {"%#.4f", 1 + 1.23i, "(1.0000+1.2300i)"},
+ {"%#.4e", 123 + 1i, "(1.2300e+02+1.0000e+00i)"},
+ {"%#.4g", 123 + 1.23i, "(123.0+1.230i)"},
+ {"%#12.5g", 0 + 100000i, "( 0.0000 +1.0000e+05i)"},
+ {"%#12.5g", 1230000 - 0i, "( 1.2300e+06 +0.0000i)"},
+ {"%b", 1 + 2i, "(4503599627370496p-52+4503599627370496p-51i)"},
+ {"%b", complex64(1 + 2i), "(8388608p-23+8388608p-22i)"},
+ // The sharp flag has no effect for binary complex format.
+ {"%#b", 1 + 2i, "(4503599627370496p-52+4503599627370496p-51i)"},
+ // Precision has no effect for binary complex format.
+ {"%.4b", 1 + 2i, "(4503599627370496p-52+4503599627370496p-51i)"},
+ {"%.4b", complex64(1 + 2i), "(8388608p-23+8388608p-22i)"},
+ // complex infinites and NaNs
+ {"%f", complex(posInf, posInf), "(∞+∞i)"},
+ {"%f", complex(negInf, negInf), "(-∞-∞i)"},
+ {"%f", complex(NaN, NaN), "(NaN+NaNi)"},
+ {"%.1f", complex(posInf, posInf), "(∞+∞i)"},
+ {"% f", complex(posInf, posInf), "( ∞+∞i)"},
+ {"% f", complex(negInf, negInf), "(-∞-∞i)"},
+ {"% f", complex(NaN, NaN), "(NaN+NaNi)"},
+ {"%8e", complex(posInf, posInf), "( ∞ +∞i)"},
+ {"% 8E", complex(posInf, posInf), "( ∞ +∞i)"},
+ {"%+8f", complex(negInf, negInf), "( -∞ -∞i)"},
+ {"% +8g", complex(negInf, negInf), "( -∞ -∞i)"}, // TODO(g)
+ {"% -8G", complex(NaN, NaN), "(NaN +NaN i)"},
+ {"%+-8b", complex(NaN, NaN), "(+NaN +NaN i)"},
+ // Zero padding does not apply to infinities and NaN.
+ {"%08f", complex(posInf, posInf), "( ∞ +∞i)"},
+ {"%-08g", complex(negInf, negInf), "(-∞ -∞ i)"},
+ {"%-08G", complex(NaN, NaN), "(NaN +NaN i)"},
+
+ // old test/fmt_test.go
+ {"%e", 1.0, "1.000000\u202f×\u202f10⁰⁰"},
+ {"%e", 1234.5678e3, "1.234568\u202f×\u202f10⁰⁶"},
+ {"%e", 1234.5678e-8, "1.234568\u202f×\u202f10⁻⁰⁵"},
+ {"%e", -7.0, "-7.000000\u202f×\u202f10⁰⁰"},
+ {"%e", -1e-9, "-1.000000\u202f×\u202f10⁻⁰⁹"},
+ {"%f", 1234.5678e3, "1,234,567.800000"},
+ {"%f", 1234.5678e-8, "0.000012"},
+ {"%f", -7.0, "-7.000000"},
+ {"%f", -1e-9, "-0.000000"},
+ {"%g", 1234.5678e3, "1.2345678\u202f×\u202f10⁰⁶"},
+ {"%g", float32(1234.5678e3), "1.2345678\u202f×\u202f10⁰⁶"},
+ {"%g", 1234.5678e-8, "1.2345678\u202f×\u202f10⁻⁰⁵"},
+ {"%g", -7.0, "-7"},
+ {"%g", -1e-9, "-1\u202f×\u202f10⁻⁰⁹"},
+ {"%g", float32(-1e-9), "-1\u202f×\u202f10⁻⁰⁹"},
+ {"%E", 1.0, "1.000000\u202f×\u202f10⁰⁰"},
+ {"%E", 1234.5678e3, "1.234568\u202f×\u202f10⁰⁶"},
+ {"%E", 1234.5678e-8, "1.234568\u202f×\u202f10⁻⁰⁵"},
+ {"%E", -7.0, "-7.000000\u202f×\u202f10⁰⁰"},
+ {"%E", -1e-9, "-1.000000\u202f×\u202f10⁻⁰⁹"},
+ {"%G", 1234.5678e3, "1.2345678\u202f×\u202f10⁰⁶"},
+ {"%G", float32(1234.5678e3), "1.2345678\u202f×\u202f10⁰⁶"},
+ {"%G", 1234.5678e-8, "1.2345678\u202f×\u202f10⁻⁰⁵"},
+ {"%G", -7.0, "-7"},
+ {"%G", -1e-9, "-1\u202f×\u202f10⁻⁰⁹"},
+ {"%G", float32(-1e-9), "-1\u202f×\u202f10⁻⁰⁹"},
+ {"%20.5s", "qwertyuiop", " qwert"},
+ {"%.5s", "qwertyuiop", "qwert"},
+ {"%-20.5s", "qwertyuiop", "qwert "},
+ {"%20c", 'x', " x"},
+ {"%-20c", 'x', "x "},
+ {"%20.6e", 1.2345e3, " 1.234500\u202f×\u202f10⁰³"},
+ {"%20.6e", 1.2345e-3, " 1.234500\u202f×\u202f10⁻⁰³"},
+ {"%20e", 1.2345e3, " 1.234500\u202f×\u202f10⁰³"},
+ {"%20e", 1.2345e-3, " 1.234500\u202f×\u202f10⁻⁰³"},
+ {"%20.8e", 1.2345e3, " 1.23450000\u202f×\u202f10⁰³"},
+ {"%20f", 1.23456789e3, " 1,234.567890"},
+ {"%20f", 1.23456789e-3, " 0.001235"},
+ {"%20f", 12345678901.23456789, "12,345,678,901.234568"},
+ {"%-20f", 1.23456789e3, "1,234.567890 "},
+ {"%20.8f", 1.23456789e3, " 1,234.56789000"},
+ {"%20.8f", 1.23456789e-3, " 0.00123457"},
+ {"%g", 1.23456789e3, "1,234.56789"},
+ {"%g", 1.23456789e-3, "0.00123456789"},
+ {"%g", 1.23456789e20, "1.23456789\u202f×\u202f10²⁰"},
+
+ // arrays
+ {"%v", array, "[1 2 3 4 5]"},
+ {"%v", iarray, "[1 hello 2.5 <nil>]"},
+ {"%v", barray, "[1 2 3 4 5]"},
+ {"%v", &array, "&[1 2 3 4 5]"},
+ {"%v", &iarray, "&[1 hello 2.5 <nil>]"},
+ {"%v", &barray, "&[1 2 3 4 5]"},
+
+ // slices
+ {"%v", slice, "[1 2 3 4 5]"},
+ {"%v", islice, "[1 hello 2.5 <nil>]"},
+ {"%v", bslice, "[1 2 3 4 5]"},
+ {"%v", &slice, "&[1 2 3 4 5]"},
+ {"%v", &islice, "&[1 hello 2.5 <nil>]"},
+ {"%v", &bslice, "&[1 2 3 4 5]"},
+
+ // byte arrays and slices with %b,%c,%d,%o,%U and %v
+ {"%b", [3]byte{65, 66, 67}, "[1000001 1000010 1000011]"},
+ {"%c", [3]byte{65, 66, 67}, "[A B C]"},
+ {"%d", [3]byte{65, 66, 67}, "[65 66 67]"},
+ {"%o", [3]byte{65, 66, 67}, "[101 102 103]"},
+ {"%U", [3]byte{65, 66, 67}, "[U+0041 U+0042 U+0043]"},
+ {"%v", [3]byte{65, 66, 67}, "[65 66 67]"},
+ {"%v", [1]byte{123}, "[123]"},
+ {"%012v", []byte{}, "[]"},
+ {"%#012v", []byte{}, "[]byte{}"},
+ {"%6v", []byte{1, 11, 111}, "[ 1 11 111]"},
+ {"%06v", []byte{1, 11, 111}, "[000001 000011 000111]"},
+ {"%-6v", []byte{1, 11, 111}, "[1 11 111 ]"},
+ {"%-06v", []byte{1, 11, 111}, "[1 11 111 ]"},
+ {"%#v", []byte{1, 11, 111}, "[]byte{0x1, 0xb, 0x6f}"},
+ {"%#6v", []byte{1, 11, 111}, "[]byte{ 0x1, 0xb, 0x6f}"},
+ {"%#06v", []byte{1, 11, 111}, "[]byte{0x000001, 0x00000b, 0x00006f}"},
+ {"%#-6v", []byte{1, 11, 111}, "[]byte{0x1 , 0xb , 0x6f }"},
+ {"%#-06v", []byte{1, 11, 111}, "[]byte{0x1 , 0xb , 0x6f }"},
+ // f.space should and f.plus should not have an effect with %v.
+ {"% v", []byte{1, 11, 111}, "[ 1 11 111]"},
+ {"%+v", [3]byte{1, 11, 111}, "[1 11 111]"},
+ {"%# -6v", []byte{1, 11, 111}, "[]byte{ 0x1 , 0xb , 0x6f }"},
+ {"%#+-6v", [3]byte{1, 11, 111}, "[3]uint8{0x1 , 0xb , 0x6f }"},
+ // f.space and f.plus should have an effect with %d.
+ {"% d", []byte{1, 11, 111}, "[ 1 11 111]"},
+ {"%+d", [3]byte{1, 11, 111}, "[+1 +11 +111]"},
+ {"%# -6d", []byte{1, 11, 111}, "[ 1 11 111 ]"},
+ {"%#+-6d", [3]byte{1, 11, 111}, "[+1 +11 +111 ]"},
+
+ // floates with %v
+ {"%v", 1.2345678, "1.2345678"},
+ {"%v", float32(1.2345678), "1.2345678"},
+
+ // complexes with %v
+ {"%v", 1 + 2i, "(1+2i)"},
+ {"%v", complex64(1 + 2i), "(1+2i)"},
+
+ // structs
+ {"%v", A{1, 2, "a", []int{1, 2}}, `{1 2 a [1 2]}`},
+ {"%+v", A{1, 2, "a", []int{1, 2}}, `{i:1 j:2 s:a x:[1 2]}`},
+
+ // +v on structs with Stringable items
+ {"%+v", B{1, 2}, `{I:<1> j:2}`},
+ {"%+v", C{1, B{2, 3}}, `{i:1 B:{I:<2> j:3}}`},
+
+ // other formats on Stringable items
+ {"%s", I(23), `<23>`},
+ {"%q", I(23), `"<23>"`},
+ {"%x", I(23), `3c32333e`},
+ {"%#x", I(23), `0x3c32333e`},
+ {"%# x", I(23), `0x3c 0x32 0x33 0x3e`},
+ // Stringer applies only to string formats.
+ {"%d", I(23), `23`},
+ // Stringer applies to the extracted value.
+ {"%s", reflect.ValueOf(I(23)), `<23>`},
+
+ // go syntax
+ {"%#v", A{1, 2, "a", []int{1, 2}}, `message.A{i:1, j:0x2, s:"a", x:[]int{1, 2}}`},
+ {"%#v", new(byte), "(*uint8)(0xPTR)"},
+ {"%#v", TestFmtInterface, "(func(*testing.T))(0xPTR)"},
+ {"%#v", make(chan int), "(chan int)(0xPTR)"},
+ {"%#v", uint64(1<<64 - 1), "0xffffffffffffffff"},
+ {"%#v", 1000000000, "1000000000"},
+ {"%#v", map[string]int{"a": 1}, `map[string]int{"a":1}`},
+ {"%#v", map[string]B{"a": {1, 2}}, `map[string]message.B{"a":message.B{I:1, j:2}}`},
+ {"%#v", []string{"a", "b"}, `[]string{"a", "b"}`},
+ {"%#v", SI{}, `message.SI{I:interface {}(nil)}`},
+ {"%#v", []int(nil), `[]int(nil)`},
+ {"%#v", []int{}, `[]int{}`},
+ {"%#v", array, `[5]int{1, 2, 3, 4, 5}`},
+ {"%#v", &array, `&[5]int{1, 2, 3, 4, 5}`},
+ {"%#v", iarray, `[4]interface {}{1, "hello", 2.5, interface {}(nil)}`},
+ {"%#v", &iarray, `&[4]interface {}{1, "hello", 2.5, interface {}(nil)}`},
+ {"%#v", map[int]byte(nil), `map[int]uint8(nil)`},
+ {"%#v", map[int]byte{}, `map[int]uint8{}`},
+ {"%#v", "foo", `"foo"`},
+ {"%#v", barray, `[5]message.renamedUint8{0x1, 0x2, 0x3, 0x4, 0x5}`},
+ {"%#v", bslice, `[]message.renamedUint8{0x1, 0x2, 0x3, 0x4, 0x5}`},
+ {"%#v", []int32(nil), "[]int32(nil)"},
+ {"%#v", 1.2345678, "1.2345678"},
+ {"%#v", float32(1.2345678), "1.2345678"},
+ // Only print []byte and []uint8 as type []byte if they appear at the top level.
+ {"%#v", []byte(nil), "[]byte(nil)"},
+ {"%#v", []uint8(nil), "[]byte(nil)"},
+ {"%#v", []byte{}, "[]byte{}"},
+ {"%#v", []uint8{}, "[]byte{}"},
+ {"%#v", reflect.ValueOf([]byte{}), "[]uint8{}"},
+ {"%#v", reflect.ValueOf([]uint8{}), "[]uint8{}"},
+ {"%#v", &[]byte{}, "&[]uint8{}"},
+ {"%#v", &[]byte{}, "&[]uint8{}"},
+ {"%#v", [3]byte{}, "[3]uint8{0x0, 0x0, 0x0}"},
+ {"%#v", [3]uint8{}, "[3]uint8{0x0, 0x0, 0x0}"},
+
+ // slices with other formats
+ {"%#x", []int{1, 2, 15}, `[0x1 0x2 0xf]`},
+ {"%x", []int{1, 2, 15}, `[1 2 f]`},
+ {"%d", []int{1, 2, 15}, `[1 2 15]`},
+ {"%d", []byte{1, 2, 15}, `[1 2 15]`},
+ {"%q", []string{"a", "b"}, `["a" "b"]`},
+ {"% 02x", []byte{1}, "01"},
+ {"% 02x", []byte{1, 2, 3}, "01 02 03"},
+
+ // Padding with byte slices.
+ {"%2x", []byte{}, " "},
+ {"%#2x", []byte{}, " "},
+ {"% 02x", []byte{}, "00"},
+ {"%# 02x", []byte{}, "00"},
+ {"%-2x", []byte{}, " "},
+ {"%-02x", []byte{}, " "},
+ {"%8x", []byte{0xab}, " ab"},
+ {"% 8x", []byte{0xab}, " ab"},
+ {"%#8x", []byte{0xab}, " 0xab"},
+ {"%# 8x", []byte{0xab}, " 0xab"},
+ {"%08x", []byte{0xab}, "000000ab"},
+ {"% 08x", []byte{0xab}, "000000ab"},
+ {"%#08x", []byte{0xab}, "00000xab"},
+ {"%# 08x", []byte{0xab}, "00000xab"},
+ {"%10x", []byte{0xab, 0xcd}, " abcd"},
+ {"% 10x", []byte{0xab, 0xcd}, " ab cd"},
+ {"%#10x", []byte{0xab, 0xcd}, " 0xabcd"},
+ {"%# 10x", []byte{0xab, 0xcd}, " 0xab 0xcd"},
+ {"%010x", []byte{0xab, 0xcd}, "000000abcd"},
+ {"% 010x", []byte{0xab, 0xcd}, "00000ab cd"},
+ {"%#010x", []byte{0xab, 0xcd}, "00000xabcd"},
+ {"%# 010x", []byte{0xab, 0xcd}, "00xab 0xcd"},
+ {"%-10X", []byte{0xab}, "AB "},
+ {"% -010X", []byte{0xab}, "AB "},
+ {"%#-10X", []byte{0xab, 0xcd}, "0XABCD "},
+ {"%# -010X", []byte{0xab, 0xcd}, "0XAB 0XCD "},
+ // Same for strings
+ {"%2x", "", " "},
+ {"%#2x", "", " "},
+ {"% 02x", "", "00"},
+ {"%# 02x", "", "00"},
+ {"%-2x", "", " "},
+ {"%-02x", "", " "},
+ {"%8x", "\xab", " ab"},
+ {"% 8x", "\xab", " ab"},
+ {"%#8x", "\xab", " 0xab"},
+ {"%# 8x", "\xab", " 0xab"},
+ {"%08x", "\xab", "000000ab"},
+ {"% 08x", "\xab", "000000ab"},
+ {"%#08x", "\xab", "00000xab"},
+ {"%# 08x", "\xab", "00000xab"},
+ {"%10x", "\xab\xcd", " abcd"},
+ {"% 10x", "\xab\xcd", " ab cd"},
+ {"%#10x", "\xab\xcd", " 0xabcd"},
+ {"%# 10x", "\xab\xcd", " 0xab 0xcd"},
+ {"%010x", "\xab\xcd", "000000abcd"},
+ {"% 010x", "\xab\xcd", "00000ab cd"},
+ {"%#010x", "\xab\xcd", "00000xabcd"},
+ {"%# 010x", "\xab\xcd", "00xab 0xcd"},
+ {"%-10X", "\xab", "AB "},
+ {"% -010X", "\xab", "AB "},
+ {"%#-10X", "\xab\xcd", "0XABCD "},
+ {"%# -010X", "\xab\xcd", "0XAB 0XCD "},
+
+ // renamings
+ {"%v", renamedBool(true), "true"},
+ {"%d", renamedBool(true), "%!d(message.renamedBool=true)"},
+ {"%o", renamedInt(8), "10"},
+ {"%d", renamedInt8(-9), "-9"},
+ {"%v", renamedInt16(10), "10"},
+ {"%v", renamedInt32(-11), "-11"},
+ {"%X", renamedInt64(255), "FF"},
+ {"%v", renamedUint(13), "13"},
+ {"%o", renamedUint8(14), "16"},
+ {"%X", renamedUint16(15), "F"},
+ {"%d", renamedUint32(16), "16"},
+ {"%X", renamedUint64(17), "11"},
+ {"%o", renamedUintptr(18), "22"},
+ {"%x", renamedString("thing"), "7468696e67"},
+ {"%d", renamedBytes([]byte{1, 2, 15}), `[1 2 15]`},
+ {"%q", renamedBytes([]byte("hello")), `"hello"`},
+ {"%x", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, "68656c6c6f"},
+ {"%X", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, "68656C6C6F"},
+ {"%s", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, "hello"},
+ {"%q", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, `"hello"`},
+ {"%v", renamedFloat32(22), "22"},
+ {"%v", renamedFloat64(33), "33"},
+ {"%v", renamedComplex64(3 + 4i), "(3+4i)"},
+ {"%v", renamedComplex128(4 - 3i), "(4-3i)"},
+
+ // Formatter
+ {"%x", F(1), "<x=F(1)>"},
+ {"%x", G(2), "2"},
+ {"%+v", S{F(4), G(5)}, "{F:<v=F(4)> G:5}"},
+
+ // GoStringer
+ {"%#v", G(6), "GoString(6)"},
+ {"%#v", S{F(7), G(8)}, "message.S{F:<v=F(7)>, G:GoString(8)}"},
+
+ // %T
+ {"%T", byte(0), "uint8"},
+ {"%T", reflect.ValueOf(nil), "reflect.Value"},
+ {"%T", (4 - 3i), "complex128"},
+ {"%T", renamedComplex128(4 - 3i), "message.renamedComplex128"},
+ {"%T", intVar, "int"},
+ {"%6T", &intVar, " *int"},
+ {"%10T", nil, " <nil>"},
+ {"%-10T", nil, "<nil> "},
+
+ // %p with pointers
+ {"%p", (*int)(nil), "0x0"},
+ {"%#p", (*int)(nil), "0"},
+ {"%p", &intVar, "0xPTR"},
+ {"%#p", &intVar, "PTR"},
+ {"%p", &array, "0xPTR"},
+ {"%p", &slice, "0xPTR"},
+ {"%8.2p", (*int)(nil), " 0x00"},
+ {"%-20.16p", &intVar, "0xPTR "},
+ // %p on non-pointers
+ {"%p", make(chan int), "0xPTR"},
+ {"%p", make(map[int]int), "0xPTR"},
+ {"%p", func() {}, "0xPTR"},
+ {"%p", 27, "%!p(int=27)"}, // not a pointer at all
+ {"%p", nil, "%!p(<nil>)"}, // nil on its own has no type ...
+ {"%#p", nil, "%!p(<nil>)"}, // ... and hence is not a pointer type.
+ // pointers with specified base
+ {"%b", &intVar, "PTR_b"},
+ {"%d", &intVar, "PTR_d"},
+ {"%o", &intVar, "PTR_o"},
+ {"%x", &intVar, "PTR_x"},
+ {"%X", &intVar, "PTR_X"},
+ // %v on pointers
+ {"%v", nil, "<nil>"},
+ {"%#v", nil, "<nil>"},
+ {"%v", (*int)(nil), "<nil>"},
+ {"%#v", (*int)(nil), "(*int)(nil)"},
+ {"%v", &intVar, "0xPTR"},
+ {"%#v", &intVar, "(*int)(0xPTR)"},
+ {"%8.2v", (*int)(nil), " <nil>"},
+ {"%-20.16v", &intVar, "0xPTR "},
+ // string method on pointer
+ {"%s", &pValue, "String(p)"}, // String method...
+ {"%p", &pValue, "0xPTR"}, // ... is not called with %p.
+
+ // %d on Stringer should give integer if possible
+ {"%s", time.Time{}.Month(), "January"},
+ {"%d", time.Time{}.Month(), "1"},
+
+ // erroneous things
+ {"%s %", "hello", "hello %!(NOVERB)"},
+ {"%s %.2", "hello", "hello %!(NOVERB)"},
+
+ // The "<nil>" show up because maps are printed by
+ // first obtaining a list of keys and then looking up
+ // each key. Since NaNs can be map keys but cannot
+ // be fetched directly, the lookup fails and returns a
+ // zero reflect.Value, which formats as <nil>.
+ // This test is just to check that it shows the two NaNs at all.
+ {"%v", map[float64]int{NaN: 1, NaN: 2}, "map[NaN:<nil> NaN:<nil>]"},
+
+ // Comparison of padding rules with C printf.
+ /*
+ C program:
+ #include <stdio.h>
+
+ char *format[] = {
+ "[%.2f]",
+ "[% .2f]",
+ "[%+.2f]",
+ "[%7.2f]",
+ "[% 7.2f]",
+ "[%+7.2f]",
+ "[% +7.2f]",
+ "[%07.2f]",
+ "[% 07.2f]",
+ "[%+07.2f]",
+ "[% +07.2f]"
+ };
+
+ int main(void) {
+ int i;
+ for(i = 0; i < 11; i++) {
+ printf("%s: ", format[i]);
+ printf(format[i], 1.0);
+ printf(" ");
+ printf(format[i], -1.0);
+ printf("\n");
+ }
+ }
+
+ Output:
+ [%.2f]: [1.00] [-1.00]
+ [% .2f]: [ 1.00] [-1.00]
+ [%+.2f]: [+1.00] [-1.00]
+ [%7.2f]: [ 1.00] [ -1.00]
+ [% 7.2f]: [ 1.00] [ -1.00]
+ [%+7.2f]: [ +1.00] [ -1.00]
+ [% +7.2f]: [ +1.00] [ -1.00]
+ [%07.2f]: [0001.00] [-001.00]
+ [% 07.2f]: [ 001.00] [-001.00]
+ [%+07.2f]: [+001.00] [-001.00]
+ [% +07.2f]: [+001.00] [-001.00]
+
+ */
+ {"%.2f", 1.0, "1.00"},
+ {"%.2f", -1.0, "-1.00"},
+ {"% .2f", 1.0, " 1.00"},
+ {"% .2f", -1.0, "-1.00"},
+ {"%+.2f", 1.0, "+1.00"},
+ {"%+.2f", -1.0, "-1.00"},
+ {"%7.2f", 1.0, " 1.00"},
+ {"%7.2f", -1.0, " -1.00"},
+ {"% 7.2f", 1.0, " 1.00"},
+ {"% 7.2f", -1.0, " -1.00"},
+ {"%+7.2f", 1.0, " +1.00"},
+ {"%+7.2f", -1.0, " -1.00"},
+ {"% +7.2f", 1.0, " +1.00"},
+ {"% +7.2f", -1.0, " -1.00"},
+ // Padding with 0's indicates minimum number of integer digits minus the
+ // period, if present, and minus the sign if it is fixed.
+ // TODO: consider making this number the number of significant digits.
+ {"%07.2f", 1.0, "0,001.00"},
+ {"%07.2f", -1.0, "-0,001.00"},
+ {"% 07.2f", 1.0, " 001.00"},
+ {"% 07.2f", -1.0, "-001.00"},
+ {"%+07.2f", 1.0, "+001.00"},
+ {"%+07.2f", -1.0, "-001.00"},
+ {"% +07.2f", 1.0, "+001.00"},
+ {"% +07.2f", -1.0, "-001.00"},
+
+ // Complex numbers: exhaustively tested in TestComplexFormatting.
+ {"%7.2f", 1 + 2i, "( 1.00 +2.00i)"},
+ {"%+07.2f", -1 - 2i, "(-001.00-002.00i)"},
+
+ // Use spaces instead of zero if padding to the right.
+ {"%0-5s", "abc", "abc "},
+ {"%-05.1f", 1.0, "1.0 "},
+
+ // float and complex formatting should not change the padding width
+ // for other elements. See issue 14642.
+ {"%06v", []interface{}{+10.0, 10}, "[000,010 000,010]"},
+ {"%06v", []interface{}{-10.0, 10}, "[-000,010 000,010]"},
+ {"%06v", []interface{}{+10.0 + 10i, 10}, "[(000,010+00,010i) 000,010]"},
+ {"%06v", []interface{}{-10.0 + 10i, 10}, "[(-000,010+00,010i) 000,010]"},
+
+ // integer formatting should not alter padding for other elements.
+ {"%03.6v", []interface{}{1, 2.0, "x"}, "[000,001 002 00x]"},
+ {"%03.0v", []interface{}{0, 2.0, "x"}, "[ 002 000]"},
+
+ // Complex fmt used to leave the plus flag set for future entries in the array
+ // causing +2+0i and +3+0i instead of 2+0i and 3+0i.
+ {"%v", []complex64{1, 2, 3}, "[(1+0i) (2+0i) (3+0i)]"},
+ {"%v", []complex128{1, 2, 3}, "[(1+0i) (2+0i) (3+0i)]"},
+
+ // Incomplete format specification caused crash.
+ {"%.", 3, "%!.(int=3)"},
+
+ // Padding for complex numbers. Has been bad, then fixed, then bad again.
+ {"%+10.2f", +104.66 + 440.51i, "( +104.66 +440.51i)"},
+ {"%+10.2f", -104.66 + 440.51i, "( -104.66 +440.51i)"},
+ {"%+10.2f", +104.66 - 440.51i, "( +104.66 -440.51i)"},
+ {"%+10.2f", -104.66 - 440.51i, "( -104.66 -440.51i)"},
+ {"%010.2f", +104.66 + 440.51i, "(0,000,104.66+000,440.51i)"},
+ {"%+010.2f", +104.66 + 440.51i, "(+000,104.66+000,440.51i)"},
+ {"%+010.2f", -104.66 + 440.51i, "(-000,104.66+000,440.51i)"},
+ {"%+010.2f", +104.66 - 440.51i, "(+000,104.66-000,440.51i)"},
+ {"%+010.2f", -104.66 - 440.51i, "(-000,104.66-000,440.51i)"},
+
+ // []T where type T is a byte with a Stringer method.
+ {"%v", byteStringerSlice, "[X X X X X]"},
+ {"%s", byteStringerSlice, "hello"},
+ {"%q", byteStringerSlice, "\"hello\""},
+ {"%x", byteStringerSlice, "68656c6c6f"},
+ {"%X", byteStringerSlice, "68656C6C6F"},
+ {"%#v", byteStringerSlice, "[]message.byteStringer{0x68, 0x65, 0x6c, 0x6c, 0x6f}"},
+
+ // And the same for Formatter.
+ {"%v", byteFormatterSlice, "[X X X X X]"},
+ {"%s", byteFormatterSlice, "hello"},
+ {"%q", byteFormatterSlice, "\"hello\""},
+ {"%x", byteFormatterSlice, "68656c6c6f"},
+ {"%X", byteFormatterSlice, "68656C6C6F"},
+ // This next case seems wrong, but the docs say the Formatter wins here.
+ {"%#v", byteFormatterSlice, "[]message.byteFormatter{X, X, X, X, X}"},
+
+ // reflect.Value handled specially in Go 1.5, making it possible to
+ // see inside non-exported fields (which cannot be accessed with Interface()).
+ // Issue 8965.
+ {"%v", reflect.ValueOf(A{}).Field(0).String(), "<int Value>"}, // Equivalent to the old way.
+ {"%v", reflect.ValueOf(A{}).Field(0), "0"}, // Sees inside the field.
+
+ // verbs apply to the extracted value too.
+ {"%s", reflect.ValueOf("hello"), "hello"},
+ {"%q", reflect.ValueOf("hello"), `"hello"`},
+ {"%#04x", reflect.ValueOf(256), "0x0100"},
+
+ // invalid reflect.Value doesn't crash.
+ {"%v", reflect.Value{}, "<invalid reflect.Value>"},
+ {"%v", &reflect.Value{}, "<invalid Value>"},
+ {"%v", SI{reflect.Value{}}, "{<invalid Value>}"},
+
+ // Tests to check that not supported verbs generate an error string.
+ {"%☠", nil, "%!☠(<nil>)"},
+ {"%☠", interface{}(nil), "%!☠(<nil>)"},
+ {"%☠", int(0), "%!☠(int=0)"},
+ {"%☠", uint(0), "%!☠(uint=0)"},
+ {"%☠", []byte{0, 1}, "[%!☠(uint8=0) %!☠(uint8=1)]"},
+ {"%☠", []uint8{0, 1}, "[%!☠(uint8=0) %!☠(uint8=1)]"},
+ {"%☠", [1]byte{0}, "[%!☠(uint8=0)]"},
+ {"%☠", [1]uint8{0}, "[%!☠(uint8=0)]"},
+ {"%☠", "hello", "%!☠(string=hello)"},
+ {"%☠", 1.2345678, "%!☠(float64=1.2345678)"},
+ {"%☠", float32(1.2345678), "%!☠(float32=1.2345678)"},
+ {"%☠", 1.2345678 + 1.2345678i, "%!☠(complex128=(1.2345678+1.2345678i))"},
+ {"%☠", complex64(1.2345678 + 1.2345678i), "%!☠(complex64=(1.2345678+1.2345678i))"},
+ {"%☠", &intVar, "%!☠(*int=0xPTR)"},
+ {"%☠", make(chan int), "%!☠(chan int=0xPTR)"},
+ {"%☠", func() {}, "%!☠(func()=0xPTR)"},
+ {"%☠", reflect.ValueOf(renamedInt(0)), "%!☠(message.renamedInt=0)"},
+ {"%☠", SI{renamedInt(0)}, "{%!☠(message.renamedInt=0)}"},
+ {"%☠", &[]interface{}{I(1), G(2)}, "&[%!☠(message.I=1) %!☠(message.G=2)]"},
+ {"%☠", SI{&[]interface{}{I(1), G(2)}}, "{%!☠(*[]interface {}=&[1 2])}"},
+ {"%☠", reflect.Value{}, "<invalid reflect.Value>"},
+ {"%☠", map[float64]int{NaN: 1}, "map[%!☠(float64=NaN):%!☠(<nil>)]"},
+}
+
+// zeroFill generates zero-filled strings of the specified width. The length
+// of the suffix (but not the prefix) is compensated for in the width calculation.
+func zeroFill(prefix string, width int, suffix string) string {
+ return prefix + strings.Repeat("0", width-len(suffix)) + suffix
+}
+
+func TestSprintf(t *testing.T) {
+ p := NewPrinter(language.Und)
+ for _, tt := range fmtTests {
+ t.Run(fmt.Sprint(tt.fmt, "/", tt.val), func(t *testing.T) {
+ s := p.Sprintf(tt.fmt, tt.val)
+ i := strings.Index(tt.out, "PTR")
+ if i >= 0 && i < len(s) {
+ var pattern, chars string
+ switch {
+ case strings.HasPrefix(tt.out[i:], "PTR_b"):
+ pattern = "PTR_b"
+ chars = "01"
+ case strings.HasPrefix(tt.out[i:], "PTR_o"):
+ pattern = "PTR_o"
+ chars = "01234567"
+ case strings.HasPrefix(tt.out[i:], "PTR_d"):
+ pattern = "PTR_d"
+ chars = "0123456789"
+ case strings.HasPrefix(tt.out[i:], "PTR_x"):
+ pattern = "PTR_x"
+ chars = "0123456789abcdef"
+ case strings.HasPrefix(tt.out[i:], "PTR_X"):
+ pattern = "PTR_X"
+ chars = "0123456789ABCDEF"
+ default:
+ pattern = "PTR"
+ chars = "0123456789abcdefABCDEF"
+ }
+ p := s[:i] + pattern
+ for j := i; j < len(s); j++ {
+ if !strings.ContainsRune(chars, rune(s[j])) {
+ p += s[j:]
+ break
+ }
+ }
+ s = p
+ }
+ if s != tt.out {
+ if _, ok := tt.val.(string); ok {
+ // Don't requote the already-quoted strings.
+ // It's too confusing to read the errors.
+ t.Errorf("Sprintf(%q, %q) = <%s> want <%s>", tt.fmt, tt.val, s, tt.out)
+ } else {
+ t.Errorf("Sprintf(%q, %v) = %q want %q", tt.fmt, tt.val, s, tt.out)
+ }
+ }
+ })
+ }
+}
+
+var f float64
+
+// TestComplexFormatting checks that a complex always formats to the same
+// thing as if done by hand with two singleton prints.
+func TestComplexFormatting(t *testing.T) {
+ var yesNo = []bool{true, false}
+ var values = []float64{1, 0, -1, posInf, negInf, NaN}
+ p := NewPrinter(language.Und)
+ for _, plus := range yesNo {
+ for _, zero := range yesNo {
+ for _, space := range yesNo {
+ for _, char := range "fFeEgG" {
+ realFmt := "%"
+ if zero {
+ realFmt += "0"
+ }
+ if space {
+ realFmt += " "
+ }
+ if plus {
+ realFmt += "+"
+ }
+ realFmt += "10.2"
+ realFmt += string(char)
+ // Imaginary part always has a sign, so force + and ignore space.
+ imagFmt := "%"
+ if zero {
+ imagFmt += "0"
+ }
+ imagFmt += "+"
+ imagFmt += "10.2"
+ imagFmt += string(char)
+ for _, realValue := range values {
+ for _, imagValue := range values {
+ one := p.Sprintf(realFmt, complex(realValue, imagValue))
+ two := p.Sprintf("("+realFmt+imagFmt+"i)", realValue, imagValue)
+ if math.IsNaN(imagValue) {
+ p := len(two) - len("NaNi)") - 1
+ if two[p] == ' ' {
+ two = two[:p] + "+" + two[p+1:]
+ } else {
+ two = two[:p+1] + "+" + two[p+1:]
+ }
+ }
+ if one != two {
+ t.Error(f, one, two)
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+type SE []interface{} // slice of empty; notational compactness.
+
+var reorderTests = []struct {
+ format string
+ args SE
+ out string
+}{
+ {"%[1]d", SE{1}, "1"},
+ {"%[2]d", SE{2, 1}, "1"},
+ {"%[2]d %[1]d", SE{1, 2}, "2 1"},
+ {"%[2]*[1]d", SE{2, 5}, " 2"},
+ {"%6.2f", SE{12.0}, " 12.00"}, // Explicit version of next line.
+ {"%[3]*.[2]*[1]f", SE{12.0, 2, 6}, " 12.00"},
+ {"%[1]*.[2]*[3]f", SE{6, 2, 12.0}, " 12.00"},
+ {"%10f", SE{12.0}, " 12.000000"},
+ {"%[1]*[3]f", SE{10, 99, 12.0}, " 12.000000"},
+ {"%.6f", SE{12.0}, "12.000000"}, // Explicit version of next line.
+ {"%.[1]*[3]f", SE{6, 99, 12.0}, "12.000000"},
+ {"%6.f", SE{12.0}, " 12"}, // // Explicit version of next line; empty precision means zero.
+ {"%[1]*.[3]f", SE{6, 3, 12.0}, " 12"},
+ // An actual use! Print the same arguments twice.
+ {"%d %d %d %#[1]o %#o %#o", SE{11, 12, 13}, "11 12 13 013 014 015"},
+
+ // Erroneous cases.
+ {"%[d", SE{2, 1}, "%!d(BADINDEX)"},
+ {"%]d", SE{2, 1}, "%!](int=2)d%!(EXTRA int=1)"},
+ {"%[]d", SE{2, 1}, "%!d(BADINDEX)"},
+ {"%[-3]d", SE{2, 1}, "%!d(BADINDEX)"},
+ {"%[99]d", SE{2, 1}, "%!d(BADINDEX)"},
+ {"%[3]", SE{2, 1}, "%!(NOVERB)"},
+ {"%[1].2d", SE{5, 6}, "%!d(BADINDEX)"},
+ {"%[1]2d", SE{2, 1}, "%!d(BADINDEX)"},
+ {"%3.[2]d", SE{7}, "%!d(BADINDEX)"},
+ {"%.[2]d", SE{7}, "%!d(BADINDEX)"},
+ {"%d %d %d %#[1]o %#o %#o %#o", SE{11, 12, 13}, "11 12 13 013 014 015 %!o(MISSING)"},
+ {"%[5]d %[2]d %d", SE{1, 2, 3}, "%!d(BADINDEX) 2 3"},
+ {"%d %[3]d %d", SE{1, 2}, "1 %!d(BADINDEX) 2"}, // Erroneous index does not affect sequence.
+ {"%.[]", SE{}, "%!](BADINDEX)"}, // Issue 10675
+ {"%.-3d", SE{42}, "%!-(int=42)3d"}, // TODO: Should this set return better error messages?
+ // The following messages are interpreted as if there is no substitution,
+ // in which case it is okay to have extra arguments. This is different
+ // semantics from the fmt package.
+ {"%2147483648d", SE{42}, "%!(NOVERB)"},
+ {"%-2147483648d", SE{42}, "%!(NOVERB)"},
+ {"%.2147483648d", SE{42}, "%!(NOVERB)"},
+}
+
+func TestReorder(t *testing.T) {
+ p := NewPrinter(language.Und)
+ for _, tc := range reorderTests {
+ t.Run(fmt.Sprint(tc.format, "/", tc.args), func(t *testing.T) {
+ s := p.Sprintf(tc.format, tc.args...)
+ if s != tc.out {
+ t.Errorf("Sprintf(%q, %v) = %q want %q", tc.format, tc.args, s, tc.out)
+ }
+ })
+ }
+}
+
+func BenchmarkSprintfPadding(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%16f", 1.0)
+ }
+ })
+}
+
+func BenchmarkSprintfEmpty(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("")
+ }
+ })
+}
+
+func BenchmarkSprintfString(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%s", "hello")
+ }
+ })
+}
+
+func BenchmarkSprintfTruncateString(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%.3s", "日本語日本語日本語")
+ }
+ })
+}
+
+func BenchmarkSprintfQuoteString(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%q", "日本語日本語日本語")
+ }
+ })
+}
+
+func BenchmarkSprintfInt(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%d", 5)
+ }
+ })
+}
+
+func BenchmarkSprintfIntInt(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%d %d", 5, 6)
+ }
+ })
+}
+
+func BenchmarkSprintfPrefixedInt(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("This is some meaningless prefix text that needs to be scanned %d", 6)
+ }
+ })
+}
+
+func BenchmarkSprintfFloat(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%g", 5.23184)
+ }
+ })
+}
+
+func BenchmarkSprintfComplex(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%f", 5.23184+5.23184i)
+ }
+ })
+}
+
+func BenchmarkSprintfBoolean(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%t", true)
+ }
+ })
+}
+
+func BenchmarkSprintfHexString(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("% #x", "0123456789abcdef")
+ }
+ })
+}
+
+func BenchmarkSprintfHexBytes(b *testing.B) {
+ data := []byte("0123456789abcdef")
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("% #x", data)
+ }
+ })
+}
+
+func BenchmarkSprintfBytes(b *testing.B) {
+ data := []byte("0123456789abcdef")
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%v", data)
+ }
+ })
+}
+
+func BenchmarkSprintfStringer(b *testing.B) {
+ stringer := I(12345)
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%v", stringer)
+ }
+ })
+}
+
+func BenchmarkSprintfStructure(b *testing.B) {
+ s := &[]interface{}{SI{12345}, map[int]string{0: "hello"}}
+ b.RunParallel(func(pb *testing.PB) {
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ p.Sprintf("%#v", s)
+ }
+ })
+}
+
+func BenchmarkManyArgs(b *testing.B) {
+ b.RunParallel(func(pb *testing.PB) {
+ var buf bytes.Buffer
+ p := NewPrinter(language.English)
+ for pb.Next() {
+ buf.Reset()
+ p.Fprintf(&buf, "%2d/%2d/%2d %d:%d:%d %s %s\n", 3, 4, 5, 11, 12, 13, "hello", "world")
+ }
+ })
+}
+
+func BenchmarkFprintInt(b *testing.B) {
+ var buf bytes.Buffer
+ p := NewPrinter(language.English)
+ for i := 0; i < b.N; i++ {
+ buf.Reset()
+ p.Fprint(&buf, 123456)
+ }
+}
+
+func BenchmarkFprintfBytes(b *testing.B) {
+ data := []byte(string("0123456789"))
+ var buf bytes.Buffer
+ p := NewPrinter(language.English)
+ for i := 0; i < b.N; i++ {
+ buf.Reset()
+ p.Fprintf(&buf, "%s", data)
+ }
+}
+
+func BenchmarkFprintIntNoAlloc(b *testing.B) {
+ var x interface{} = 123456
+ var buf bytes.Buffer
+ p := NewPrinter(language.English)
+ for i := 0; i < b.N; i++ {
+ buf.Reset()
+ p.Fprint(&buf, x)
+ }
+}
+
+var mallocBuf bytes.Buffer
+var mallocPointer *int // A pointer so we know the interface value won't allocate.
+
+var mallocTest = []struct {
+ count int
+ desc string
+ fn func(p *Printer)
+}{
+ {0, `Sprintf("")`, func(p *Printer) { p.Sprintf("") }},
+ {1, `Sprintf("xxx")`, func(p *Printer) { p.Sprintf("xxx") }},
+ {2, `Sprintf("%x")`, func(p *Printer) { p.Sprintf("%x", 7) }},
+ {2, `Sprintf("%s")`, func(p *Printer) { p.Sprintf("%s", "hello") }},
+ {3, `Sprintf("%x %x")`, func(p *Printer) { p.Sprintf("%x %x", 7, 112) }},
+ {2, `Sprintf("%g")`, func(p *Printer) { p.Sprintf("%g", float32(3.14159)) }}, // TODO: Can this be 1?
+ {1, `Fprintf(buf, "%s")`, func(p *Printer) { mallocBuf.Reset(); p.Fprintf(&mallocBuf, "%s", "hello") }},
+ // If the interface value doesn't need to allocate, amortized allocation overhead should be zero.
+ {0, `Fprintf(buf, "%x %x %x")`, func(p *Printer) {
+ mallocBuf.Reset()
+ p.Fprintf(&mallocBuf, "%x %x %x", mallocPointer, mallocPointer, mallocPointer)
+ }},
+}
+
+var _ bytes.Buffer
+
+func TestCountMallocs(t *testing.T) {
+ switch {
+ case testing.Short():
+ t.Skip("skipping malloc count in short mode")
+ case runtime.GOMAXPROCS(0) > 1:
+ t.Skip("skipping; GOMAXPROCS>1")
+ // TODO: detect race detecter enabled.
+ // case race.Enabled:
+ // t.Skip("skipping malloc count under race detector")
+ }
+ p := NewPrinter(language.English)
+ for _, mt := range mallocTest {
+ mallocs := testing.AllocsPerRun(100, func() { mt.fn(p) })
+ if got, max := mallocs, float64(mt.count); got > max {
+ t.Errorf("%s: got %v allocs, want <=%v", mt.desc, got, max)
+ }
+ }
+}
+
+type flagPrinter struct{}
+
+func (flagPrinter) Format(f fmt.State, c rune) {
+ s := "%"
+ for i := 0; i < 128; i++ {
+ if f.Flag(i) {
+ s += string(i)
+ }
+ }
+ if w, ok := f.Width(); ok {
+ s += fmt.Sprintf("%d", w)
+ }
+ if p, ok := f.Precision(); ok {
+ s += fmt.Sprintf(".%d", p)
+ }
+ s += string(c)
+ io.WriteString(f, "["+s+"]")
+}
+
+var flagtests = []struct {
+ in string
+ out string
+}{
+ {"%a", "[%a]"},
+ {"%-a", "[%-a]"},
+ {"%+a", "[%+a]"},
+ {"%#a", "[%#a]"},
+ {"% a", "[% a]"},
+ {"%0a", "[%0a]"},
+ {"%1.2a", "[%1.2a]"},
+ {"%-1.2a", "[%-1.2a]"},
+ {"%+1.2a", "[%+1.2a]"},
+ {"%-+1.2a", "[%+-1.2a]"},
+ {"%-+1.2abc", "[%+-1.2a]bc"},
+ {"%-1.2abc", "[%-1.2a]bc"},
+}
+
+func TestFlagParser(t *testing.T) {
+ var flagprinter flagPrinter
+ for _, tt := range flagtests {
+ s := NewPrinter(language.Und).Sprintf(tt.in, &flagprinter)
+ if s != tt.out {
+ t.Errorf("Sprintf(%q, &flagprinter) => %q, want %q", tt.in, s, tt.out)
+ }
+ }
+}
+
+func TestStructPrinter(t *testing.T) {
+ type T struct {
+ a string
+ b string
+ c int
+ }
+ var s T
+ s.a = "abc"
+ s.b = "def"
+ s.c = 123
+ var tests = []struct {
+ fmt string
+ out string
+ }{
+ {"%v", "{abc def 123}"},
+ {"%+v", "{a:abc b:def c:123}"},
+ {"%#v", `message.T{a:"abc", b:"def", c:123}`},
+ }
+ p := NewPrinter(language.Und)
+ for _, tt := range tests {
+ out := p.Sprintf(tt.fmt, s)
+ if out != tt.out {
+ t.Errorf("Sprintf(%q, s) = %#q, want %#q", tt.fmt, out, tt.out)
+ }
+ // The same but with a pointer.
+ out = p.Sprintf(tt.fmt, &s)
+ if out != "&"+tt.out {
+ t.Errorf("Sprintf(%q, &s) = %#q, want %#q", tt.fmt, out, "&"+tt.out)
+ }
+ }
+}
+
+func TestSlicePrinter(t *testing.T) {
+ p := NewPrinter(language.Und)
+ slice := []int{}
+ s := p.Sprint(slice)
+ if s != "[]" {
+ t.Errorf("empty slice printed as %q not %q", s, "[]")
+ }
+ slice = []int{1, 2, 3}
+ s = p.Sprint(slice)
+ if s != "[1 2 3]" {
+ t.Errorf("slice: got %q expected %q", s, "[1 2 3]")
+ }
+ s = p.Sprint(&slice)
+ if s != "&[1 2 3]" {
+ t.Errorf("&slice: got %q expected %q", s, "&[1 2 3]")
+ }
+}
+
+// presentInMap checks map printing using substrings so we don't depend on the
+// print order.
+func presentInMap(s string, a []string, t *testing.T) {
+ for i := 0; i < len(a); i++ {
+ loc := strings.Index(s, a[i])
+ if loc < 0 {
+ t.Errorf("map print: expected to find %q in %q", a[i], s)
+ }
+ // make sure the match ends here
+ loc += len(a[i])
+ if loc >= len(s) || (s[loc] != ' ' && s[loc] != ']') {
+ t.Errorf("map print: %q not properly terminated in %q", a[i], s)
+ }
+ }
+}
+
+func TestMapPrinter(t *testing.T) {
+ p := NewPrinter(language.Und)
+ m0 := make(map[int]string)
+ s := p.Sprint(m0)
+ if s != "map[]" {
+ t.Errorf("empty map printed as %q not %q", s, "map[]")
+ }
+ m1 := map[int]string{1: "one", 2: "two", 3: "three"}
+ a := []string{"1:one", "2:two", "3:three"}
+ presentInMap(p.Sprintf("%v", m1), a, t)
+ presentInMap(p.Sprint(m1), a, t)
+ // Pointer to map prints the same but with initial &.
+ if !strings.HasPrefix(p.Sprint(&m1), "&") {
+ t.Errorf("no initial & for address of map")
+ }
+ presentInMap(p.Sprintf("%v", &m1), a, t)
+ presentInMap(p.Sprint(&m1), a, t)
+}
+
+func TestEmptyMap(t *testing.T) {
+ const emptyMapStr = "map[]"
+ var m map[string]int
+ p := NewPrinter(language.Und)
+ s := p.Sprint(m)
+ if s != emptyMapStr {
+ t.Errorf("nil map printed as %q not %q", s, emptyMapStr)
+ }
+ m = make(map[string]int)
+ s = p.Sprint(m)
+ if s != emptyMapStr {
+ t.Errorf("empty map printed as %q not %q", s, emptyMapStr)
+ }
+}
+
+// TestBlank checks that Sprint (and hence Print, Fprint) puts spaces in the
+// right places, that is, between arg pairs in which neither is a string.
+func TestBlank(t *testing.T) {
+ p := NewPrinter(language.Und)
+ got := p.Sprint("<", 1, ">:", 1, 2, 3, "!")
+ expect := "<1>:1 2 3!"
+ if got != expect {
+ t.Errorf("got %q expected %q", got, expect)
+ }
+}
+
+// TestBlankln checks that Sprintln (and hence Println, Fprintln) puts spaces in
+// the right places, that is, between all arg pairs.
+func TestBlankln(t *testing.T) {
+ p := NewPrinter(language.Und)
+ got := p.Sprintln("<", 1, ">:", 1, 2, 3, "!")
+ expect := "< 1 >: 1 2 3 !\n"
+ if got != expect {
+ t.Errorf("got %q expected %q", got, expect)
+ }
+}
+
+// TestFormatterPrintln checks Formatter with Sprint, Sprintln, Sprintf.
+func TestFormatterPrintln(t *testing.T) {
+ p := NewPrinter(language.Und)
+ f := F(1)
+ expect := "<v=F(1)>\n"
+ s := p.Sprint(f, "\n")
+ if s != expect {
+ t.Errorf("Sprint wrong with Formatter: expected %q got %q", expect, s)
+ }
+ s = p.Sprintln(f)
+ if s != expect {
+ t.Errorf("Sprintln wrong with Formatter: expected %q got %q", expect, s)
+ }
+ s = p.Sprintf("%v\n", f)
+ if s != expect {
+ t.Errorf("Sprintf wrong with Formatter: expected %q got %q", expect, s)
+ }
+}
+
+func args(a ...interface{}) []interface{} { return a }
+
+var startests = []struct {
+ fmt string
+ in []interface{}
+ out string
+}{
+ {"%*d", args(4, 42), " 42"},
+ {"%-*d", args(4, 42), "42 "},
+ {"%*d", args(-4, 42), "42 "},
+ {"%-*d", args(-4, 42), "42 "},
+ {"%.*d", args(4, 42), "0,042"},
+ {"%*.*d", args(8, 4, 42), " 0,042"},
+ {"%0*d", args(4, 42), "0,042"},
+ // Some non-int types for width. (Issue 10732).
+ {"%0*d", args(uint(4), 42), "0,042"},
+ {"%0*d", args(uint64(4), 42), "0,042"},
+ {"%0*d", args('\x04', 42), "0,042"},
+ {"%0*d", args(uintptr(4), 42), "0,042"},
+
+ // erroneous
+ {"%*d", args(nil, 42), "%!(BADWIDTH)42"},
+ {"%*d", args(int(1e7), 42), "%!(BADWIDTH)42"},
+ {"%*d", args(int(-1e7), 42), "%!(BADWIDTH)42"},
+ {"%.*d", args(nil, 42), "%!(BADPREC)42"},
+ {"%.*d", args(-1, 42), "%!(BADPREC)42"},
+ {"%.*d", args(int(1e7), 42), "%!(BADPREC)42"},
+ {"%.*d", args(uint(1e7), 42), "%!(BADPREC)42"},
+ {"%.*d", args(uint64(1<<63), 42), "%!(BADPREC)42"}, // Huge negative (-inf).
+ {"%.*d", args(uint64(1<<64-1), 42), "%!(BADPREC)42"}, // Small negative (-1).
+ {"%*d", args(5, "foo"), "%!d(string= foo)"},
+ {"%*% %d", args(20, 5), "% 5"},
+ {"%*", args(4), "%!(NOVERB)"},
+}
+
+func TestWidthAndPrecision(t *testing.T) {
+ p := NewPrinter(language.Und)
+ for i, tt := range startests {
+ t.Run(fmt.Sprint(tt.fmt, tt.in), func(t *testing.T) {
+ s := p.Sprintf(tt.fmt, tt.in...)
+ if s != tt.out {
+ t.Errorf("#%d: %q: got %q expected %q", i, tt.fmt, s, tt.out)
+ }
+ })
+ }
+}
+
+// PanicS is a type that panics in String.
+type PanicS struct {
+ message interface{}
+}
+
+// Value receiver.
+func (p PanicS) String() string {
+ panic(p.message)
+}
+
+// PanicGo is a type that panics in GoString.
+type PanicGo struct {
+ message interface{}
+}
+
+// Value receiver.
+func (p PanicGo) GoString() string {
+ panic(p.message)
+}
+
+// PanicF is a type that panics in Format.
+type PanicF struct {
+ message interface{}
+}
+
+// Value receiver.
+func (p PanicF) Format(f fmt.State, c rune) {
+ panic(p.message)
+}
+
+var panictests = []struct {
+ desc string
+ fmt string
+ in interface{}
+ out string
+}{
+ // String
+ {"String", "%s", (*PanicS)(nil), "<nil>"}, // nil pointer special case
+ {"String", "%s", PanicS{io.ErrUnexpectedEOF}, "%!s(PANIC=unexpected EOF)"},
+ {"String", "%s", PanicS{3}, "%!s(PANIC=3)"},
+ // GoString
+ {"GoString", "%#v", (*PanicGo)(nil), "<nil>"}, // nil pointer special case
+ {"GoString", "%#v", PanicGo{io.ErrUnexpectedEOF}, "%!v(PANIC=unexpected EOF)"},
+ {"GoString", "%#v", PanicGo{3}, "%!v(PANIC=3)"},
+ // Issue 18282. catchPanic should not clear fmtFlags permanently.
+ {"Issue 18282", "%#v", []interface{}{PanicGo{3}, PanicGo{3}}, "[]interface {}{%!v(PANIC=3), %!v(PANIC=3)}"},
+ // Format
+ {"Format", "%s", (*PanicF)(nil), "<nil>"}, // nil pointer special case
+ {"Format", "%s", PanicF{io.ErrUnexpectedEOF}, "%!s(PANIC=unexpected EOF)"},
+ {"Format", "%s", PanicF{3}, "%!s(PANIC=3)"},
+}
+
+func TestPanics(t *testing.T) {
+ p := NewPrinter(language.Und)
+ for i, tt := range panictests {
+ t.Run(fmt.Sprint(tt.desc, "/", tt.fmt, "/", tt.in), func(t *testing.T) {
+ s := p.Sprintf(tt.fmt, tt.in)
+ if s != tt.out {
+ t.Errorf("%d: %q: got %q expected %q", i, tt.fmt, s, tt.out)
+ }
+ })
+ }
+}
+
+// recurCount tests that erroneous String routine doesn't cause fatal recursion.
+var recurCount = 0
+
+type Recur struct {
+ i int
+ failed *bool
+}
+
+func (r *Recur) String() string {
+ p := NewPrinter(language.Und)
+ if recurCount++; recurCount > 10 {
+ *r.failed = true
+ return "FAIL"
+ }
+ // This will call badVerb. Before the fix, that would cause us to recur into
+ // this routine to print %!p(value). Now we don't call the user's method
+ // during an error.
+ return p.Sprintf("recur@%p value: %d", r, r.i)
+}
+
+func TestBadVerbRecursion(t *testing.T) {
+ p := NewPrinter(language.Und)
+ failed := false
+ r := &Recur{3, &failed}
+ p.Sprintf("recur@%p value: %d\n", &r, r.i)
+ if failed {
+ t.Error("fail with pointer")
+ }
+ failed = false
+ r = &Recur{4, &failed}
+ p.Sprintf("recur@%p, value: %d\n", r, r.i)
+ if failed {
+ t.Error("fail with value")
+ }
+}
+
+func TestNilDoesNotBecomeTyped(t *testing.T) {
+ p := NewPrinter(language.Und)
+ type A struct{}
+ type B struct{}
+ var a *A = nil
+ var b B = B{}
+ got := p.Sprintf("%s %s %s %s %s", nil, a, nil, b, nil) // go vet should complain about this line.
+ const expect = "%!s(<nil>) %!s(*message.A=<nil>) %!s(<nil>) {} %!s(<nil>)"
+ if got != expect {
+ t.Errorf("expected:\n\t%q\ngot:\n\t%q", expect, got)
+ }
+}
+
+var formatterFlagTests = []struct {
+ in string
+ val interface{}
+ out string
+}{
+ // scalar values with the (unused by fmt) 'a' verb.
+ {"%a", flagPrinter{}, "[%a]"},
+ {"%-a", flagPrinter{}, "[%-a]"},
+ {"%+a", flagPrinter{}, "[%+a]"},
+ {"%#a", flagPrinter{}, "[%#a]"},
+ {"% a", flagPrinter{}, "[% a]"},
+ {"%0a", flagPrinter{}, "[%0a]"},
+ {"%1.2a", flagPrinter{}, "[%1.2a]"},
+ {"%-1.2a", flagPrinter{}, "[%-1.2a]"},
+ {"%+1.2a", flagPrinter{}, "[%+1.2a]"},
+ {"%-+1.2a", flagPrinter{}, "[%+-1.2a]"},
+ {"%-+1.2abc", flagPrinter{}, "[%+-1.2a]bc"},
+ {"%-1.2abc", flagPrinter{}, "[%-1.2a]bc"},
+
+ // composite values with the 'a' verb
+ {"%a", [1]flagPrinter{}, "[[%a]]"},
+ {"%-a", [1]flagPrinter{}, "[[%-a]]"},
+ {"%+a", [1]flagPrinter{}, "[[%+a]]"},
+ {"%#a", [1]flagPrinter{}, "[[%#a]]"},
+ {"% a", [1]flagPrinter{}, "[[% a]]"},
+ {"%0a", [1]flagPrinter{}, "[[%0a]]"},
+ {"%1.2a", [1]flagPrinter{}, "[[%1.2a]]"},
+ {"%-1.2a", [1]flagPrinter{}, "[[%-1.2a]]"},
+ {"%+1.2a", [1]flagPrinter{}, "[[%+1.2a]]"},
+ {"%-+1.2a", [1]flagPrinter{}, "[[%+-1.2a]]"},
+ {"%-+1.2abc", [1]flagPrinter{}, "[[%+-1.2a]]bc"},
+ {"%-1.2abc", [1]flagPrinter{}, "[[%-1.2a]]bc"},
+
+ // simple values with the 'v' verb
+ {"%v", flagPrinter{}, "[%v]"},
+ {"%-v", flagPrinter{}, "[%-v]"},
+ {"%+v", flagPrinter{}, "[%+v]"},
+ {"%#v", flagPrinter{}, "[%#v]"},
+ {"% v", flagPrinter{}, "[% v]"},
+ {"%0v", flagPrinter{}, "[%0v]"},
+ {"%1.2v", flagPrinter{}, "[%1.2v]"},
+ {"%-1.2v", flagPrinter{}, "[%-1.2v]"},
+ {"%+1.2v", flagPrinter{}, "[%+1.2v]"},
+ {"%-+1.2v", flagPrinter{}, "[%+-1.2v]"},
+ {"%-+1.2vbc", flagPrinter{}, "[%+-1.2v]bc"},
+ {"%-1.2vbc", flagPrinter{}, "[%-1.2v]bc"},
+
+ // composite values with the 'v' verb.
+ {"%v", [1]flagPrinter{}, "[[%v]]"},
+ {"%-v", [1]flagPrinter{}, "[[%-v]]"},
+ {"%+v", [1]flagPrinter{}, "[[%+v]]"},
+ {"%#v", [1]flagPrinter{}, "[1]message.flagPrinter{[%#v]}"},
+ {"% v", [1]flagPrinter{}, "[[% v]]"},
+ {"%0v", [1]flagPrinter{}, "[[%0v]]"},
+ {"%1.2v", [1]flagPrinter{}, "[[%1.2v]]"},
+ {"%-1.2v", [1]flagPrinter{}, "[[%-1.2v]]"},
+ {"%+1.2v", [1]flagPrinter{}, "[[%+1.2v]]"},
+ {"%-+1.2v", [1]flagPrinter{}, "[[%+-1.2v]]"},
+ {"%-+1.2vbc", [1]flagPrinter{}, "[[%+-1.2v]]bc"},
+ {"%-1.2vbc", [1]flagPrinter{}, "[[%-1.2v]]bc"},
+}
+
+func TestFormatterFlags(t *testing.T) {
+ p := NewPrinter(language.Und)
+ for _, tt := range formatterFlagTests {
+ s := p.Sprintf(tt.in, tt.val)
+ if s != tt.out {
+ t.Errorf("Sprintf(%q, %T) = %q, want %q", tt.in, tt.val, s, tt.out)
+ }
+ }
+}
+
+func TestParsenum(t *testing.T) {
+ testCases := []struct {
+ s string
+ start, end int
+ num int
+ isnum bool
+ newi int
+ }{
+ {"a123", 0, 4, 0, false, 0},
+ {"1234", 1, 1, 0, false, 1},
+ {"123a", 0, 4, 123, true, 3},
+ {"12a3", 0, 4, 12, true, 2},
+ {"1234", 0, 4, 1234, true, 4},
+ {"1a234", 1, 3, 0, false, 1},
+ }
+ for _, tt := range testCases {
+ num, isnum, newi := parsenum(tt.s, tt.start, tt.end)
+ if num != tt.num || isnum != tt.isnum || newi != tt.newi {
+ t.Errorf("parsenum(%q, %d, %d) = %d, %v, %d, want %d, %v, %d", tt.s, tt.start, tt.end, num, isnum, newi, tt.num, tt.isnum, tt.newi)
+ }
+ }
+}
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