2021-09-30 09:32:20 +03:00
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fn test_repeat() {
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r1 := `V`
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r2 := `👋`
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assert r1.repeat(5) == 'VVVVV'
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assert r2.repeat(5) == '👋👋👋👋👋'
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assert r1.repeat(1) == r1.str()
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assert r2.repeat(1) == r2.str()
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assert r1.repeat(0) == ''
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assert r2.repeat(0) == ''
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}
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2021-12-01 17:35:13 +03:00
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fn test_length_in_bytes() {
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assert rune(0x0).length_in_bytes() == 1
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assert `A`.length_in_bytes() == 1 // latin letter
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assert rune(0x7F).length_in_bytes() == 1
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//
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assert rune(0x80).length_in_bytes() == 2
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assert `Д`.length_in_bytes() == 2 // cyrillic letter
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assert rune(0x7FF).length_in_bytes() == 2
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//
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assert rune(0x800).length_in_bytes() == 3
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assert `喂`.length_in_bytes() == 3 // hey
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assert rune(0xFFFF).length_in_bytes() == 3
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//
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assert rune(0xD800).length_in_bytes() == -1 // min for surrogates
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assert rune(0xD866).length_in_bytes() == -1 // invalid
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assert rune(0xDFFF).length_in_bytes() == -1 // max for surrogates
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//
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assert rune(0x100000).length_in_bytes() == 4
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assert rune(0x10FFD7).length_in_bytes() == 4 // "Supplementary Private Use Area-B" ¯\_(ツ)_/¯
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assert rune(0x10FFFF).length_in_bytes() == 4
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//
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assert rune(0x110000).length_in_bytes() == -1
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}
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