--- /dev/null
+// Copyright 2015 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 precis
+
+import (
+ "bytes"
+ "fmt"
+ "reflect"
+ "testing"
+
+ "golang.org/x/text/internal/testtext"
+ "golang.org/x/text/secure/bidirule"
+ "golang.org/x/text/transform"
+)
+
+type testCase struct {
+ input string
+ output string
+ err error
+}
+
+var enforceTestCases = []struct {
+ name string
+ p *Profile
+ cases []testCase
+}{
+ {"Basic", NewFreeform(), []testCase{
+ {"e\u0301\u031f", "\u00e9\u031f", nil}, // normalize
+ }},
+
+ {"Context Rule 1", NewFreeform(), []testCase{
+ // Rule 1: zero-width non-joiner (U+200C)
+ // From RFC:
+ // False
+ // If Canonical_Combining_Class(Before(cp)) .eq. Virama Then True;
+ // If RegExpMatch((Joining_Type:{L,D})(Joining_Type:T)*\u200C
+ // (Joining_Type:T)*(Joining_Type:{R,D})) Then True;
+ //
+ // Example runes for different joining types:
+ // Join L: U+A872; PHAGS-PA SUPERFIXED LETTER RA
+ // Join D: U+062C; HAH WITH DOT BELOW
+ // Join T: U+0610; ARABIC SIGN SALLALLAHOU ALAYHE WASSALLAM
+ // Join R: U+0627; ALEF
+ // Virama: U+0A4D; GURMUKHI SIGN VIRAMA
+ // Virama and Join T: U+0ACD; GUJARATI SIGN VIRAMA
+ {"\u200c", "", errContext},
+ {"\u200ca", "", errContext},
+ {"a\u200c", "", errContext},
+ {"\u200c\u0627", "", errContext}, // missing JoinStart
+ {"\u062c\u200c", "", errContext}, // missing JoinEnd
+ {"\u0610\u200c\u0610\u0627", "", errContext}, // missing JoinStart
+ {"\u062c\u0610\u200c\u0610", "", errContext}, // missing JoinEnd
+
+ // Variants of: D T* U+200c T* R
+ {"\u062c\u200c\u0627", "\u062c\u200c\u0627", nil},
+ {"\u062c\u0610\u200c\u0610\u0627", "\u062c\u0610\u200c\u0610\u0627", nil},
+ {"\u062c\u0610\u0610\u200c\u0610\u0610\u0627", "\u062c\u0610\u0610\u200c\u0610\u0610\u0627", nil},
+ {"\u062c\u0610\u200c\u0627", "\u062c\u0610\u200c\u0627", nil},
+ {"\u062c\u200c\u0610\u0627", "\u062c\u200c\u0610\u0627", nil},
+
+ // Variants of: L T* U+200c T* D
+ {"\ua872\u200c\u062c", "\ua872\u200c\u062c", nil},
+ {"\ua872\u0610\u200c\u0610\u062c", "\ua872\u0610\u200c\u0610\u062c", nil},
+ {"\ua872\u0610\u0610\u200c\u0610\u0610\u062c", "\ua872\u0610\u0610\u200c\u0610\u0610\u062c", nil},
+ {"\ua872\u0610\u200c\u062c", "\ua872\u0610\u200c\u062c", nil},
+ {"\ua872\u200c\u0610\u062c", "\ua872\u200c\u0610\u062c", nil},
+
+ // Virama
+ {"\u0a4d\u200c", "\u0a4d\u200c", nil},
+ {"\ua872\u0a4d\u200c", "\ua872\u0a4d\u200c", nil},
+ {"\ua872\u0a4d\u0610\u200c", "", errContext},
+ {"\ua872\u0a4d\u0610\u200c", "", errContext},
+
+ {"\u0acd\u200c", "\u0acd\u200c", nil},
+ {"\ua872\u0acd\u200c", "\ua872\u0acd\u200c", nil},
+ {"\ua872\u0acd\u0610\u200c", "", errContext},
+ {"\ua872\u0acd\u0610\u200c", "", errContext},
+
+ // Using Virama as join T
+ {"\ua872\u0acd\u200c\u062c", "\ua872\u0acd\u200c\u062c", nil},
+ {"\ua872\u200c\u0acd\u062c", "\ua872\u200c\u0acd\u062c", nil},
+ }},
+
+ {"Context Rule 2", NewFreeform(), []testCase{
+ // Rule 2: zero-width joiner (U+200D)
+ {"\u200d", "", errContext},
+ {"\u200da", "", errContext},
+ {"a\u200d", "", errContext},
+
+ {"\u0a4d\u200d", "\u0a4d\u200d", nil},
+ {"\ua872\u0a4d\u200d", "\ua872\u0a4d\u200d", nil},
+ {"\u0a4da\u200d", "", errContext},
+ }},
+
+ {"Context Rule 3", NewFreeform(), []testCase{
+ // Rule 3: middle dot
+ {"·", "", errContext},
+ {"l·", "", errContext},
+ {"·l", "", errContext},
+ {"a·", "", errContext},
+ {"l·a", "", errContext},
+ {"a·a", "", errContext},
+ {"l·l", "l·l", nil},
+ {"al·la", "al·la", nil},
+ }},
+
+ {"Context Rule 4", NewFreeform(), []testCase{
+ // Rule 4: Greek lower numeral U+0375
+ {"͵", "", errContext},
+ {"͵a", "", errContext},
+ {"α͵", "", errContext},
+ {"͵α", "͵α", nil},
+ {"α͵α", "α͵α", nil},
+ {"͵͵α", "͵͵α", nil}, // The numeric sign is itself Greek.
+ {"α͵͵α", "α͵͵α", nil},
+ {"α͵͵", "", errContext},
+ {"α͵͵a", "", errContext},
+ }},
+
+ {"Context Rule 5+6", NewFreeform(), []testCase{
+ // Rule 5+6: Hebrew preceding
+ // U+05f3: Geresh
+ {"׳", "", errContext},
+ {"׳ה", "", errContext},
+ {"a׳b", "", errContext},
+ {"ש׳", "ש׳", nil}, // U+05e9 U+05f3
+ {"ש׳׳׳", "ש׳׳׳", nil}, // U+05e9 U+05f3
+
+ // U+05f4: Gershayim
+ {"״", "", errContext},
+ {"״ה", "", errContext},
+ {"a״b", "", errContext},
+ {"ש״", "ש״", nil}, // U+05e9 U+05f4
+ {"ש״״״", "ש״״״", nil}, // U+05e9 U+05f4
+ {"aש״״״", "aש״״״", nil}, // U+05e9 U+05f4
+ }},
+
+ {"Context Rule 7", NewFreeform(), []testCase{
+ // Rule 7: Katakana middle Dot
+ {"・", "", errContext},
+ {"abc・", "", errContext},
+ {"・def", "", errContext},
+ {"abc・def", "", errContext},
+ {"aヅc・def", "aヅc・def", nil},
+ {"abc・dぶf", "abc・dぶf", nil},
+ {"⺐bc・def", "⺐bc・def", nil},
+ }},
+
+ {"Context Rule 8+9", NewFreeform(), []testCase{
+ // Rule 8+9: Arabic Indic Digit
+ {"١٢٣٤٥۶", "", errContext},
+ {"۱۲۳۴۵٦", "", errContext},
+ {"١٢٣٤٥", "١٢٣٤٥", nil},
+ {"۱۲۳۴۵", "۱۲۳۴۵", nil},
+ }},
+
+ {"Nickname", Nickname, []testCase{
+ {" Swan of Avon ", "Swan of Avon", nil},
+ {"", "", errEmptyString},
+ {" ", "", errEmptyString},
+ {" ", "", errEmptyString},
+ {"a\u00A0a\u1680a\u2000a\u2001a\u2002a\u2003a\u2004a\u2005a\u2006a\u2007a\u2008a\u2009a\u200Aa\u202Fa\u205Fa\u3000a", "a a a a a a a a a a a a a a a a a", nil},
+ {"Foo", "Foo", nil},
+ {"foo", "foo", nil},
+ {"Foo Bar", "Foo Bar", nil},
+ {"foo bar", "foo bar", nil},
+ {"\u03A3", "\u03A3", nil},
+ {"\u03C3", "\u03C3", nil},
+ // Greek final sigma is left as is (do not fold!)
+ {"\u03C2", "\u03C2", nil},
+ {"\u265A", "♚", nil},
+ {"Richard \u2163", "Richard IV", nil},
+ {"\u212B", "Å", nil},
+ {"\uFB00", "ff", nil}, // because of NFKC
+ {"שa", "שa", nil}, // no bidi rule
+ {"동일조건변경허락", "동일조건변경허락", nil},
+ }},
+ {"OpaqueString", OpaqueString, []testCase{
+ {" Swan of Avon ", " Swan of Avon ", nil},
+ {"", "", errEmptyString},
+ {" ", " ", nil},
+ {" ", " ", nil},
+ {"a\u00A0a\u1680a\u2000a\u2001a\u2002a\u2003a\u2004a\u2005a\u2006a\u2007a\u2008a\u2009a\u200Aa\u202Fa\u205Fa\u3000a", "a a a a a a a a a a a a a a a a a", nil},
+ {"Foo", "Foo", nil},
+ {"foo", "foo", nil},
+ {"Foo Bar", "Foo Bar", nil},
+ {"foo bar", "foo bar", nil},
+ {"\u03C3", "\u03C3", nil},
+ {"Richard \u2163", "Richard \u2163", nil},
+ {"\u212B", "Å", nil},
+ {"Jack of \u2666s", "Jack of \u2666s", nil},
+ {"my cat is a \u0009by", "", errDisallowedRune},
+ {"שa", "שa", nil}, // no bidi rule
+ }},
+ {"UsernameCaseMapped", UsernameCaseMapped, []testCase{
+ // TODO: Should this work?
+ // {UsernameCaseMapped, "", "", errDisallowedRune},
+ {"juliet@example.com", "juliet@example.com", nil},
+ {"fussball", "fussball", nil},
+ {"fu\u00DFball", "fu\u00DFball", nil},
+ {"\u03C0", "\u03C0", nil},
+ {"\u03A3", "\u03C3", nil},
+ {"\u03C3", "\u03C3", nil},
+ // Greek final sigma is left as is (do not fold!)
+ {"\u03C2", "\u03C2", nil},
+ {"\u0049", "\u0069", nil},
+ {"\u0049", "\u0069", nil},
+ {"\u03D2", "", errDisallowedRune},
+ {"\u03B0", "\u03B0", nil},
+ {"foo bar", "", errDisallowedRune},
+ {"♚", "", errDisallowedRune},
+ {"\u007E", "~", nil},
+ {"a", "a", nil},
+ {"!", "!", nil},
+ {"²", "", errDisallowedRune},
+ {"\t", "", errDisallowedRune},
+ {"\n", "", errDisallowedRune},
+ {"\u26D6", "", errDisallowedRune},
+ {"\u26FF", "", errDisallowedRune},
+ {"\uFB00", "", errDisallowedRune},
+ {"\u1680", "", errDisallowedRune},
+ {" ", "", errDisallowedRune},
+ {" ", "", errDisallowedRune},
+ {"\u01C5", "", errDisallowedRune},
+ {"\u16EE", "", errDisallowedRune}, // Nl RUNIC ARLAUG SYMBOL
+ {"\u0488", "", errDisallowedRune}, // Me COMBINING CYRILLIC HUNDRED THOUSANDS SIGN
+ {"\u212B", "\u00e5", nil}, // Angstrom sign, NFC -> U+00E5
+ {"A\u030A", "å", nil}, // A + ring
+ {"\u00C5", "å", nil}, // A with ring
+ {"\u00E7", "ç", nil}, // c cedille
+ {"\u0063\u0327", "ç", nil}, // c + cedille
+ {"\u0158", "ř", nil},
+ {"\u0052\u030C", "ř", nil},
+
+ {"\u1E61", "\u1E61", nil}, // LATIN SMALL LETTER S WITH DOT ABOVE
+
+ // Confusable characters ARE allowed and should NOT be mapped.
+ {"\u0410", "\u0430", nil}, // CYRILLIC CAPITAL LETTER A
+
+ // Full width should be mapped to the canonical decomposition.
+ {"ＡＢ", "ab", nil},
+ {"שc", "", bidirule.ErrInvalid}, // bidi rule
+
+ }},
+ {"UsernameCasePreserved", UsernameCasePreserved, []testCase{
+ {"ABC", "ABC", nil},
+ {"ＡＢ", "AB", nil},
+ {"שc", "", bidirule.ErrInvalid}, // bidi rule
+ {"\uFB00", "", errDisallowedRune},
+ {"\u212B", "\u00c5", nil}, // Angstrom sign, NFC -> U+00E5
+ {"ẛ", "", errDisallowedRune}, // LATIN SMALL LETTER LONG S WITH DOT ABOVE
+ }},
+}
+
+func doTests(t *testing.T, fn func(t *testing.T, p *Profile, tc testCase)) {
+ for _, g := range enforceTestCases {
+ for i, tc := range g.cases {
+ name := fmt.Sprintf("%s:%d:%+q", g.name, i, tc.input)
+ testtext.Run(t, name, func(t *testing.T) {
+ fn(t, g.p, tc)
+ })
+ }
+ }
+}
+
+func TestString(t *testing.T) {
+ doTests(t, func(t *testing.T, p *Profile, tc testCase) {
+ if e, err := p.String(tc.input); tc.err != err || e != tc.output {
+ t.Errorf("got %+q (err: %v); want %+q (err: %v)", e, err, tc.output, tc.err)
+ }
+ })
+}
+
+func TestBytes(t *testing.T) {
+ doTests(t, func(t *testing.T, p *Profile, tc testCase) {
+ if e, err := p.Bytes([]byte(tc.input)); tc.err != err || string(e) != tc.output {
+ t.Errorf("got %+q (err: %v); want %+q (err: %v)", string(e), err, tc.output, tc.err)
+ }
+ })
+ // Test that calling Bytes with something that doesn't transform returns a
+ // copy.
+ orig := []byte("hello")
+ b, _ := NewFreeform().Bytes(orig)
+ if reflect.ValueOf(b).Pointer() == reflect.ValueOf(orig).Pointer() {
+ t.Error("original and result are the same slice; should be a copy")
+ }
+}
+
+func TestAppend(t *testing.T) {
+ doTests(t, func(t *testing.T, p *Profile, tc testCase) {
+ if e, err := p.Append(nil, []byte(tc.input)); tc.err != err || string(e) != tc.output {
+ t.Errorf("got %+q (err: %v); want %+q (err: %v)", string(e), err, tc.output, tc.err)
+ }
+ })
+}
+
+func TestStringMallocs(t *testing.T) {
+ if n := testtext.AllocsPerRun(100, func() { UsernameCaseMapped.String("helloworld") }); n > 0 {
+ // TODO: reduce this to 0.
+ t.Skipf("got %f allocs, want 0", n)
+ }
+}
+
+func TestAppendMallocs(t *testing.T) {
+ str := []byte("helloworld")
+ out := make([]byte, 0, len(str))
+ if n := testtext.AllocsPerRun(100, func() { UsernameCaseMapped.Append(out, str) }); n > 0 {
+ t.Errorf("got %f allocs, want 0", n)
+ }
+}
+
+func TestTransformMallocs(t *testing.T) {
+ str := []byte("helloworld")
+ out := make([]byte, 0, len(str))
+ tr := UsernameCaseMapped.NewTransformer()
+ if n := testtext.AllocsPerRun(100, func() {
+ tr.Reset()
+ tr.Transform(out, str, true)
+ }); n > 0 {
+ t.Errorf("got %f allocs, want 0", n)
+ }
+}
+
+func min(a, b int) int {
+ if a < b {
+ return a
+ }
+ return b
+}
+
+// TestTransformerShortBuffers tests that the precis.Transformer implements the
+// spirit, not just the letter (the method signatures), of the
+// transform.Transformer interface.
+//
+// In particular, it tests that, if one or both of the dst or src buffers are
+// short, so that multiple Transform calls are required to complete the overall
+// transformation, the end result is identical to one Transform call with
+// sufficiently long buffers.
+func TestTransformerShortBuffers(t *testing.T) {
+ srcUnit := []byte("a\u0300cce\u0301nts") // NFD normalization form.
+ wantUnit := []byte("àccénts") // NFC normalization form.
+ src := bytes.Repeat(srcUnit, 16)
+ want := bytes.Repeat(wantUnit, 16)
+ const long = 4096
+ dst := make([]byte, long)
+
+ // 5, 7, 9, 11, 13, 16 and 17 are all pair-wise co-prime, which means that
+ // slicing the dst and src buffers into 5, 7, 13 and 17 byte chunks will
+ // fall at different places inside the repeated srcUnit's and wantUnit's.
+ if len(srcUnit) != 11 || len(wantUnit) != 9 || len(src) > long || len(want) > long {
+ t.Fatal("inconsistent lengths")
+ }
+
+ tr := NewFreeform().NewTransformer()
+ for _, deltaD := range []int{5, 7, 13, 17, long} {
+ loop:
+ for _, deltaS := range []int{5, 7, 13, 17, long} {
+ tr.Reset()
+ d0 := 0
+ s0 := 0
+ for {
+ d1 := min(len(dst), d0+deltaD)
+ s1 := min(len(src), s0+deltaS)
+ nDst, nSrc, err := tr.Transform(dst[d0:d1:d1], src[s0:s1:s1], s1 == len(src))
+ d0 += nDst
+ s0 += nSrc
+ if err == nil {
+ break
+ }
+ if err == transform.ErrShortDst || err == transform.ErrShortSrc {
+ continue
+ }
+ t.Errorf("deltaD=%d, deltaS=%d: %v", deltaD, deltaS, err)
+ continue loop
+ }
+ if s0 != len(src) {
+ t.Errorf("deltaD=%d, deltaS=%d: s0: got %d, want %d", deltaD, deltaS, s0, len(src))
+ continue
+ }
+ if d0 != len(want) {
+ t.Errorf("deltaD=%d, deltaS=%d: d0: got %d, want %d", deltaD, deltaS, d0, len(want))
+ continue
+ }
+ got := dst[:d0]
+ if !bytes.Equal(got, want) {
+ t.Errorf("deltaD=%d, deltaS=%d:\ngot %q\nwant %q", deltaD, deltaS, got, want)
+ continue
+ }
+ }
+ }
+}
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