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9e2819b5d4
Noted as useful during review of #14448. Updates #14457 Change-Id: I0f16f08d5b05a8e9044b19ef6c02d3dab497f131 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
79 lines
1.5 KiB
Go
79 lines
1.5 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package stringsx
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import (
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"cmp"
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"strings"
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"testing"
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)
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func TestCompareFold(t *testing.T) {
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tests := []struct {
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a, b string
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}{
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// Basic ASCII cases
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{"", ""},
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{"a", "a"},
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{"a", "A"},
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{"A", "a"},
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{"a", "b"},
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{"b", "a"},
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{"abc", "ABC"},
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{"ABC", "abc"},
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{"abc", "abd"},
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{"abd", "abc"},
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// Length differences
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{"abc", "ab"},
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{"ab", "abc"},
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// Unicode cases
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{"世界", "世界"},
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{"Hello世界", "hello世界"},
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{"世界Hello", "世界hello"},
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{"世界", "世界x"},
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{"世界x", "世界"},
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// Special case folding examples
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{"ß", "ss"}, // German sharp s
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{"fi", "fi"}, // fi ligature
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{"Σ", "σ"}, // Greek sigma
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{"İ", "i\u0307"}, // Turkish dotted I
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// Mixed cases
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{"HelloWorld", "helloworld"},
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{"HELLOWORLD", "helloworld"},
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{"helloworld", "HELLOWORLD"},
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{"HelloWorld", "helloworld"},
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{"helloworld", "HelloWorld"},
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// Edge cases
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{" ", " "},
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{"1", "1"},
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{"123", "123"},
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{"!@#", "!@#"},
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}
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wants := []int{}
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for _, tt := range tests {
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got := CompareFold(tt.a, tt.b)
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want := cmp.Compare(strings.ToLower(tt.a), strings.ToLower(tt.b))
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if got != want {
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t.Errorf("CompareFold(%q, %q) = %v, want %v", tt.a, tt.b, got, want)
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}
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wants = append(wants, want)
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}
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if n := testing.AllocsPerRun(1000, func() {
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for i, tt := range tests {
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if CompareFold(tt.a, tt.b) != wants[i] {
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panic("unexpected")
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}
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}
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}); n > 0 {
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t.Errorf("allocs = %v; want 0", int(n))
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}
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}
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