// 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)
}
}
}
