--- /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 search
+
+import (
+ "reflect"
+ "strings"
+ "testing"
+
+ "golang.org/x/text/language"
+)
+
+func TestCompile(t *testing.T) {
+ for i, tc := range []struct {
+ desc string
+ pattern string
+ options []Option
+ n int
+ }{{
+ desc: "empty",
+ pattern: "",
+ n: 0,
+ }, {
+ desc: "single",
+ pattern: "a",
+ n: 1,
+ }, {
+ desc: "keep modifier",
+ pattern: "a\u0300", // U+0300: COMBINING GRAVE ACCENT
+ n: 2,
+ }, {
+ desc: "remove modifier",
+ pattern: "a\u0300", // U+0300: COMBINING GRAVE ACCENT
+ options: []Option{IgnoreDiacritics},
+ n: 1,
+ }, {
+ desc: "single with double collation element",
+ pattern: "ä",
+ n: 2,
+ }, {
+ desc: "leading variable",
+ pattern: " a",
+ n: 2,
+ }, {
+ desc: "trailing variable",
+ pattern: "aa ",
+ n: 3,
+ }, {
+ desc: "leading and trailing variable",
+ pattern: " äb ",
+ n: 5,
+ }, {
+ desc: "keep interior variable",
+ pattern: " ä b ",
+ n: 6,
+ }, {
+ desc: "keep interior variables",
+ pattern: " b ä ",
+ n: 7,
+ }, {
+ desc: "remove ignoreables (zero-weights across the board)",
+ pattern: "\u009Db\u009Dä\u009D", // U+009D: OPERATING SYSTEM COMMAND
+ n: 3,
+ }} {
+ m := New(language.Und, tc.options...)
+ p := m.CompileString(tc.pattern)
+ if len(p.ce) != tc.n {
+ t.Errorf("%d:%s: Compile(%+q): got %d; want %d", i, tc.desc, tc.pattern, len(p.ce), tc.n)
+ }
+ }
+}
+
+func TestNorm(t *testing.T) {
+ // U+0300: COMBINING GRAVE ACCENT (CCC=230)
+ // U+031B: COMBINING HORN (CCC=216)
+ for _, tc := range []struct {
+ desc string
+ a string
+ b string
+ want bool // a and b compile into the same pattern?
+ }{{
+ "simple",
+ "eee\u0300\u031b",
+ "eee\u031b\u0300",
+ true,
+ }, {
+ "large number of modifiers in pattern",
+ strings.Repeat("\u0300", 29) + "\u0318",
+ "\u0318" + strings.Repeat("\u0300", 29),
+ true,
+ }, {
+ "modifier overflow in pattern",
+ strings.Repeat("\u0300", 30) + "\u0318",
+ "\u0318" + strings.Repeat("\u0300", 30),
+ false,
+ }} {
+ m := New(language.Und)
+ a := m.CompileString(tc.a)
+ b := m.CompileString(tc.b)
+ if got := reflect.DeepEqual(a, b); got != tc.want {
+ t.Errorf("Compile(a) == Compile(b) == %v; want %v", got, tc.want)
+ }
+ }
+}
+
+func TestForwardSearch(t *testing.T) {
+ for i, tc := range []struct {
+ desc string
+ tag string
+ options []Option
+ pattern string
+ text string
+ want []int
+ }{{
+ // The semantics of an empty search is to match nothing.
+ // TODO: change this to be in line with strings.Index? It is quite a
+ // different beast, so not sure yet.
+
+ desc: "empty pattern and text",
+ tag: "und",
+ pattern: "",
+ text: "",
+ want: nil, // TODO: consider: []int{0, 0},
+ }, {
+ desc: "non-empty pattern and empty text",
+ tag: "und",
+ pattern: " ",
+ text: "",
+ want: nil,
+ }, {
+ desc: "empty pattern and non-empty text",
+ tag: "und",
+ pattern: "",
+ text: "abc",
+ want: nil, // TODO: consider: []int{0, 0, 1, 1, 2, 2, 3, 3},
+ }, {
+ // Variable-only patterns. We don't support variables at the moment,
+ // but verify that, given this, the behavior is indeed as expected.
+
+ desc: "exact match of variable",
+ tag: "und",
+ pattern: " ",
+ text: " ",
+ want: []int{0, 1},
+ }, {
+ desc: "variables not handled by default",
+ tag: "und",
+ pattern: "- ",
+ text: " -",
+ want: nil, // Would be (1, 2) for a median match with variable}.
+ }, {
+ desc: "multiple subsequent identical variables",
+ tag: "und",
+ pattern: " ",
+ text: " ",
+ want: []int{0, 1, 1, 2, 2, 3, 3, 4},
+ }, {
+ desc: "text with variables",
+ tag: "und",
+ options: []Option{IgnoreDiacritics},
+ pattern: "abc",
+ text: "3 abc 3",
+ want: []int{2, 5},
+ }, {
+ desc: "pattern with interior variables",
+ tag: "und",
+ options: []Option{IgnoreDiacritics},
+ pattern: "a b c",
+ text: "3 a b c abc a b c 3",
+ want: []int{2, 7}, // Would have 3 matches using variable.
+
+ // TODO: Different variable handling settings.
+ }, {
+ // Options.
+
+ desc: "match all levels",
+ tag: "und",
+ pattern: "Abc",
+ text: "abcAbcABCÁbcábc",
+ want: []int{3, 6},
+ }, {
+ desc: "ignore diacritics in text",
+ tag: "und",
+ options: []Option{IgnoreDiacritics},
+ pattern: "Abc",
+ text: "Ábc",
+ want: []int{0, 4},
+ }, {
+ desc: "ignore diacritics in pattern",
+ tag: "und",
+ options: []Option{IgnoreDiacritics},
+ pattern: "Ábc",
+ text: "Abc",
+ want: []int{0, 3},
+ }, {
+ desc: "ignore diacritics",
+ tag: "und",
+ options: []Option{IgnoreDiacritics},
+ pattern: "Abc",
+ text: "abcAbcABCÁbcábc",
+ want: []int{3, 6, 9, 13},
+ }, {
+ desc: "ignore case",
+ tag: "und",
+ options: []Option{IgnoreCase},
+ pattern: "Abc",
+ text: "abcAbcABCÁbcábc",
+ want: []int{0, 3, 3, 6, 6, 9},
+ }, {
+ desc: "ignore case and diacritics",
+ tag: "und",
+ options: []Option{IgnoreCase, IgnoreDiacritics},
+ pattern: "Abc",
+ text: "abcAbcABCÁbcábc",
+ want: []int{0, 3, 3, 6, 6, 9, 9, 13, 13, 17},
+ }, {
+ desc: "ignore width to fullwidth",
+ tag: "und",
+ options: []Option{IgnoreWidth},
+ pattern: "abc",
+ text: "123 \uFF41\uFF42\uFF43 123", // U+FF41-3: FULLWIDTH LATIN SMALL LETTER A-C
+ want: []int{4, 13},
+ }, {
+ // TODO: distinguish between case and width.
+ desc: "don't ignore width to fullwidth, ignoring only case",
+ tag: "und",
+ options: []Option{IgnoreCase},
+ pattern: "abc",
+ text: "123 \uFF41\uFF42\uFF43 123", // U+FF41-3: FULLWIDTH LATIN SMALL LETTER A-C
+ want: []int{4, 13},
+ }, {
+ desc: "ignore width to fullwidth and diacritics",
+ tag: "und",
+ options: []Option{IgnoreWidth, IgnoreDiacritics},
+ pattern: "abc",
+ text: "123 \uFF41\uFF42\uFF43 123", // U+FF41-3: FULLWIDTH LATIN SMALL LETTER A-C
+ want: []int{4, 13},
+ }, {
+ desc: "whole grapheme, single rune",
+ tag: "und",
+ pattern: "eee",
+ text: "123 eeé 123",
+ want: nil,
+ }, {
+ // Note: rules on when to apply contractions may, for certain languages,
+ // differ between search and collation. For example, "ch" is not
+ // considered a contraction for the purpose of searching in Spanish.
+ // Therefore, be careful picking this test.
+ desc: "whole grapheme, contractions",
+ tag: "da",
+ pattern: "aba",
+ // Fails at the primary level, because "aa" is a contraction.
+ text: "123 abaa 123",
+ want: []int{},
+ }, {
+ desc: "whole grapheme, trailing modifier",
+ tag: "und",
+ pattern: "eee",
+ text: "123 eee\u0300 123", // U+0300: COMBINING GRAVE ACCENT
+ want: nil,
+ }, {
+ // Language-specific matching.
+
+ desc: "",
+ tag: "da",
+ options: []Option{IgnoreCase},
+ pattern: "Århus",
+ text: "AarhusÅrhus Århus ",
+ want: []int{0, 6, 6, 12, 14, 20},
+ }, {
+ desc: "",
+ tag: "da",
+ options: []Option{IgnoreCase},
+ pattern: "Aarhus",
+ text: "Århus Aarhus",
+ want: []int{0, 6, 7, 13},
+ }, {
+ desc: "",
+ tag: "en", // Å does not match A for English.
+ options: []Option{IgnoreCase},
+ pattern: "Aarhus",
+ text: "Århus",
+ want: nil,
+ }, {
+ desc: "ignore modifier in text",
+ options: []Option{IgnoreDiacritics},
+ tag: "und",
+ pattern: "eee",
+ text: "123 eee\u0300 123", // U+0300: COMBINING GRAVE ACCENT
+ want: []int{4, 9}, // Matches on grapheme boundary.
+ }, {
+ desc: "ignore multiple modifiers in text",
+ options: []Option{IgnoreDiacritics},
+ tag: "und",
+ pattern: "eee",
+ text: "123 eee\u0300\u0300 123", // U+0300: COMBINING GRAVE ACCENT
+ want: []int{4, 11}, // Matches on grapheme boundary.
+ }, {
+ desc: "ignore modifier in pattern",
+ options: []Option{IgnoreDiacritics},
+ tag: "und",
+ pattern: "eee\u0300", // U+0300: COMBINING GRAVE ACCENT
+ text: "123 eee 123",
+ want: []int{4, 7},
+ }, {
+ desc: "ignore multiple modifiers in pattern",
+ options: []Option{IgnoreDiacritics},
+ tag: "und",
+ pattern: "eee\u0300\u0300", // U+0300: COMBINING GRAVE ACCENT
+ text: "123 eee 123",
+ want: []int{4, 7},
+ }, {
+ desc: "match non-normalized pattern",
+ tag: "und",
+ // U+0300: COMBINING GRAVE ACCENT (CCC=230)
+ // U+031B: COMBINING HORN (CCC=216)
+ pattern: "eee\u0300\u031b",
+ text: "123 eee\u031b\u0300 123",
+ want: []int{4, 11},
+ }, {
+ desc: "match non-normalized text",
+ tag: "und",
+ // U+0300: COMBINING GRAVE ACCENT (CCC=230)
+ // U+031B: COMBINING HORN (CCC=216)
+ pattern: "eee\u031b\u0300",
+ text: "123 eee\u0300\u031b 123",
+ want: []int{4, 11},
+ }} {
+ m := New(language.MustParse(tc.tag), tc.options...)
+ p := m.CompileString(tc.pattern)
+ for j := 0; j < len(tc.text); {
+ start, end := p.IndexString(tc.text[j:])
+ if start == -1 && end == -1 {
+ j++
+ continue
+ }
+ start += j
+ end += j
+ j = end
+ if len(tc.want) == 0 {
+ t.Errorf("%d:%s: found unexpected result [%d %d]", i, tc.desc, start, end)
+ break
+ }
+ if tc.want[0] != start || tc.want[1] != end {
+ t.Errorf("%d:%s: got [%d %d]; want %v", i, tc.desc, start, end, tc.want[:2])
+ tc.want = tc.want[2:]
+ break
+ }
+ tc.want = tc.want[2:]
+ }
+ if len(tc.want) != 0 {
+ t.Errorf("%d:%s: %d extra results", i, tc.desc, len(tc.want)/2)
+ }
+ }
+}
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