358 lines
9.2 KiB
Go
358 lines
9.2 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package search
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import (
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"reflect"
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"strings"
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"testing"
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"golang.org/x/text/language"
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)
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func TestCompile(t *testing.T) {
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for i, tc := range []struct {
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desc string
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pattern string
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options []Option
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n int
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}{{
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desc: "empty",
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pattern: "",
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n: 0,
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}, {
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desc: "single",
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pattern: "a",
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n: 1,
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}, {
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desc: "keep modifier",
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pattern: "a\u0300", // U+0300: COMBINING GRAVE ACCENT
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n: 2,
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}, {
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desc: "remove modifier",
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pattern: "a\u0300", // U+0300: COMBINING GRAVE ACCENT
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options: []Option{IgnoreDiacritics},
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n: 1,
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}, {
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desc: "single with double collation element",
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pattern: "ä",
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n: 2,
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}, {
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desc: "leading variable",
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pattern: " a",
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n: 2,
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}, {
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desc: "trailing variable",
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pattern: "aa ",
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n: 3,
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}, {
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desc: "leading and trailing variable",
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pattern: " äb ",
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n: 5,
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}, {
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desc: "keep interior variable",
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pattern: " ä b ",
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n: 6,
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}, {
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desc: "keep interior variables",
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pattern: " b ä ",
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n: 7,
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}, {
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desc: "remove ignoreables (zero-weights across the board)",
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pattern: "\u009Db\u009Dä\u009D", // U+009D: OPERATING SYSTEM COMMAND
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n: 3,
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}} {
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m := New(language.Und, tc.options...)
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p := m.CompileString(tc.pattern)
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if len(p.ce) != tc.n {
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t.Errorf("%d:%s: Compile(%+q): got %d; want %d", i, tc.desc, tc.pattern, len(p.ce), tc.n)
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}
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}
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}
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func TestNorm(t *testing.T) {
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// U+0300: COMBINING GRAVE ACCENT (CCC=230)
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// U+031B: COMBINING HORN (CCC=216)
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for _, tc := range []struct {
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desc string
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a string
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b string
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want bool // a and b compile into the same pattern?
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}{{
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"simple",
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"eee\u0300\u031b",
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"eee\u031b\u0300",
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true,
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}, {
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"large number of modifiers in pattern",
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strings.Repeat("\u0300", 29) + "\u0318",
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"\u0318" + strings.Repeat("\u0300", 29),
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true,
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}, {
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"modifier overflow in pattern",
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strings.Repeat("\u0300", 30) + "\u0318",
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"\u0318" + strings.Repeat("\u0300", 30),
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false,
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}} {
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m := New(language.Und)
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a := m.CompileString(tc.a)
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b := m.CompileString(tc.b)
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if got := reflect.DeepEqual(a, b); got != tc.want {
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t.Errorf("Compile(a) == Compile(b) == %v; want %v", got, tc.want)
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}
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}
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}
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func TestForwardSearch(t *testing.T) {
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for i, tc := range []struct {
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desc string
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tag string
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options []Option
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pattern string
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text string
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want []int
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}{{
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// The semantics of an empty search is to match nothing.
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// TODO: change this to be in line with strings.Index? It is quite a
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// different beast, so not sure yet.
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desc: "empty pattern and text",
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tag: "und",
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pattern: "",
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text: "",
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want: nil, // TODO: consider: []int{0, 0},
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}, {
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desc: "non-empty pattern and empty text",
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tag: "und",
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pattern: " ",
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text: "",
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want: nil,
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}, {
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desc: "empty pattern and non-empty text",
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tag: "und",
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pattern: "",
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text: "abc",
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want: nil, // TODO: consider: []int{0, 0, 1, 1, 2, 2, 3, 3},
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}, {
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// Variable-only patterns. We don't support variables at the moment,
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// but verify that, given this, the behavior is indeed as expected.
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desc: "exact match of variable",
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tag: "und",
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pattern: " ",
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text: " ",
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want: []int{0, 1},
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}, {
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desc: "variables not handled by default",
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tag: "und",
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pattern: "- ",
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text: " -",
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want: nil, // Would be (1, 2) for a median match with variable}.
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}, {
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desc: "multiple subsequent identical variables",
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tag: "und",
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pattern: " ",
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text: " ",
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want: []int{0, 1, 1, 2, 2, 3, 3, 4},
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}, {
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desc: "text with variables",
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tag: "und",
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options: []Option{IgnoreDiacritics},
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pattern: "abc",
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text: "3 abc 3",
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want: []int{2, 5},
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}, {
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desc: "pattern with interior variables",
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tag: "und",
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options: []Option{IgnoreDiacritics},
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pattern: "a b c",
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text: "3 a b c abc a b c 3",
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want: []int{2, 7}, // Would have 3 matches using variable.
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// TODO: Different variable handling settings.
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}, {
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// Options.
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desc: "match all levels",
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tag: "und",
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pattern: "Abc",
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text: "abcAbcABCÁbcábc",
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want: []int{3, 6},
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}, {
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desc: "ignore diacritics in text",
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tag: "und",
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options: []Option{IgnoreDiacritics},
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pattern: "Abc",
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text: "Ábc",
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want: []int{0, 4},
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}, {
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desc: "ignore diacritics in pattern",
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tag: "und",
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options: []Option{IgnoreDiacritics},
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pattern: "Ábc",
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text: "Abc",
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want: []int{0, 3},
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}, {
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desc: "ignore diacritics",
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tag: "und",
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options: []Option{IgnoreDiacritics},
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pattern: "Abc",
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text: "abcAbcABCÁbcábc",
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want: []int{3, 6, 9, 13},
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}, {
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desc: "ignore case",
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tag: "und",
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options: []Option{IgnoreCase},
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pattern: "Abc",
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text: "abcAbcABCÁbcábc",
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want: []int{0, 3, 3, 6, 6, 9},
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}, {
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desc: "ignore case and diacritics",
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tag: "und",
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options: []Option{IgnoreCase, IgnoreDiacritics},
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pattern: "Abc",
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text: "abcAbcABCÁbcábc",
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want: []int{0, 3, 3, 6, 6, 9, 9, 13, 13, 17},
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}, {
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desc: "ignore width to fullwidth",
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tag: "und",
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options: []Option{IgnoreWidth},
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pattern: "abc",
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text: "123 \uFF41\uFF42\uFF43 123", // U+FF41-3: FULLWIDTH LATIN SMALL LETTER A-C
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want: []int{4, 13},
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}, {
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// TODO: distinguish between case and width.
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desc: "don't ignore width to fullwidth, ignoring only case",
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tag: "und",
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options: []Option{IgnoreCase},
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pattern: "abc",
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text: "123 \uFF41\uFF42\uFF43 123", // U+FF41-3: FULLWIDTH LATIN SMALL LETTER A-C
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want: []int{4, 13},
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}, {
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desc: "ignore width to fullwidth and diacritics",
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tag: "und",
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options: []Option{IgnoreWidth, IgnoreDiacritics},
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pattern: "abc",
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text: "123 \uFF41\uFF42\uFF43 123", // U+FF41-3: FULLWIDTH LATIN SMALL LETTER A-C
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want: []int{4, 13},
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}, {
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desc: "whole grapheme, single rune",
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tag: "und",
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pattern: "eee",
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text: "123 eeé 123",
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want: nil,
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}, {
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// Note: rules on when to apply contractions may, for certain languages,
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// differ between search and collation. For example, "ch" is not
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// considered a contraction for the purpose of searching in Spanish.
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// Therefore, be careful picking this test.
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desc: "whole grapheme, contractions",
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tag: "da",
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pattern: "aba",
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// Fails at the primary level, because "aa" is a contraction.
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text: "123 abaa 123",
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want: []int{},
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}, {
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desc: "whole grapheme, trailing modifier",
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tag: "und",
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pattern: "eee",
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text: "123 eee\u0300 123", // U+0300: COMBINING GRAVE ACCENT
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want: nil,
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}, {
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// Language-specific matching.
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desc: "",
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tag: "da",
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options: []Option{IgnoreCase},
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pattern: "Århus",
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text: "AarhusÅrhus Århus ",
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want: []int{0, 6, 6, 12, 14, 20},
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}, {
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desc: "",
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tag: "da",
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options: []Option{IgnoreCase},
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pattern: "Aarhus",
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text: "Århus Aarhus",
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want: []int{0, 6, 7, 13},
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}, {
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desc: "",
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tag: "en", // Å does not match A for English.
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options: []Option{IgnoreCase},
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pattern: "Aarhus",
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text: "Århus",
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want: nil,
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}, {
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desc: "ignore modifier in text",
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options: []Option{IgnoreDiacritics},
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tag: "und",
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pattern: "eee",
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text: "123 eee\u0300 123", // U+0300: COMBINING GRAVE ACCENT
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want: []int{4, 9}, // Matches on grapheme boundary.
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}, {
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desc: "ignore multiple modifiers in text",
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options: []Option{IgnoreDiacritics},
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tag: "und",
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pattern: "eee",
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text: "123 eee\u0300\u0300 123", // U+0300: COMBINING GRAVE ACCENT
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want: []int{4, 11}, // Matches on grapheme boundary.
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}, {
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desc: "ignore modifier in pattern",
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options: []Option{IgnoreDiacritics},
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tag: "und",
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pattern: "eee\u0300", // U+0300: COMBINING GRAVE ACCENT
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text: "123 eee 123",
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want: []int{4, 7},
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}, {
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desc: "ignore multiple modifiers in pattern",
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options: []Option{IgnoreDiacritics},
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tag: "und",
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pattern: "eee\u0300\u0300", // U+0300: COMBINING GRAVE ACCENT
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text: "123 eee 123",
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want: []int{4, 7},
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}, {
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desc: "match non-normalized pattern",
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tag: "und",
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// U+0300: COMBINING GRAVE ACCENT (CCC=230)
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// U+031B: COMBINING HORN (CCC=216)
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pattern: "eee\u0300\u031b",
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text: "123 eee\u031b\u0300 123",
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want: []int{4, 11},
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}, {
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desc: "match non-normalized text",
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tag: "und",
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// U+0300: COMBINING GRAVE ACCENT (CCC=230)
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// U+031B: COMBINING HORN (CCC=216)
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pattern: "eee\u031b\u0300",
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text: "123 eee\u0300\u031b 123",
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want: []int{4, 11},
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}} {
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m := New(language.MustParse(tc.tag), tc.options...)
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p := m.CompileString(tc.pattern)
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for j := 0; j < len(tc.text); {
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start, end := p.IndexString(tc.text[j:])
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if start == -1 && end == -1 {
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j++
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continue
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}
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start += j
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end += j
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j = end
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if len(tc.want) == 0 {
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t.Errorf("%d:%s: found unexpected result [%d %d]", i, tc.desc, start, end)
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break
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}
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if tc.want[0] != start || tc.want[1] != end {
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t.Errorf("%d:%s: got [%d %d]; want %v", i, tc.desc, start, end, tc.want[:2])
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tc.want = tc.want[2:]
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break
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}
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tc.want = tc.want[2:]
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}
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if len(tc.want) != 0 {
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t.Errorf("%d:%s: %d extra results", i, tc.desc, len(tc.want)/2)
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}
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}
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}
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