21 lines
567 B
Rust
21 lines
567 B
Rust
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fn create_phone_number(numbers: &[u8]) -> String {
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let numbers = numbers.iter().map(|i| i.to_string()).collect::<String>();
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format!("({}) {}-{}", &numbers[..3], &numbers[3..6], &numbers[6..])
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}
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#[test]
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fn returns_expected() {
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assert_eq!(
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create_phone_number(&[1, 2, 3, 4, 5, 6, 7, 8, 9, 0]),
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"(123) 456-7890"
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);
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assert_eq!(
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create_phone_number(&[1, 1, 1, 1, 1, 1, 1, 1, 1, 1]),
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"(111) 111-1111"
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);
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assert_eq!(
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create_phone_number(&[1, 2, 3, 4, 5, 6, 7, 8, 9, 9]),
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"(123) 456-7899"
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);
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}
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