42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
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package hotime
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import "testing"
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func TestTruncateUA_ShortUnchanged(t *testing.T) {
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ua := "Mozilla/5.0 (Test)"
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if got := truncateUA(ua, 200); got != ua {
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t.Fatalf("短串不应被截断: got=%q want=%q", got, ua)
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}
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}
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func TestTruncateUA_LongTruncatedTo200(t *testing.T) {
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long := ""
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for i := 0; i < 300; i++ {
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long += "a"
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}
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got := truncateUA(long, 200)
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if len([]rune(got)) != 200 {
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t.Fatalf("截断后长度=%d want 200", len([]rune(got)))
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}
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if got != long[:200] {
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t.Fatalf("ASCII 截断内容不符: got=%q", got)
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}
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}
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func TestTruncateUA_MultiByteNotBroken(t *testing.T) {
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// 前 199 个 ASCII + 1 个多字节字符（"中"占 3 字节），max=200 时应完整保留该 rune 而非切碎字节
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prefix := ""
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for i := 0; i < 199; i++ {
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prefix += "a"
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}
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long := prefix + "中" + "extra-should-be-cut"
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got := truncateUA(long, 200)
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runes := []rune(got)
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if len(runes) != 200 {
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t.Fatalf("按 rune 截断后应为 200 个字符, got=%d (%q)", len(runes), got)
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}
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if runes[199] != '中' {
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t.Fatalf("第 200 个字符应为完整的 '中'，实际=%q", string(runes[199]))
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}
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}
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