79 lines
1.9 KiB
V
79 lines
1.9 KiB
V
fn test_gated_arrays() {
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a := [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
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assert a#[-1..] == [9]
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assert a#[..-9] == [0]
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assert a#[-9..-7] == [1, 2]
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assert a#[-2..] == [8, 9]
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// fixed array
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a1 := [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]!
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assert a1#[-1..] == [9]
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assert a1#[..-9] == [0]
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assert a1#[-9..-7] == [1, 2]
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assert a1#[-2..] == [8, 9]
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// empty array
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assert a#[-3..-4] == [] // start > end
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assert a#[20..] == [] // start > array.len
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assert a#[-20..-10] == [] // start+len < 0
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assert a#[20..-9] == [] // start > end && start > end
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}
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fn test_gated_strings() {
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a := '0123456789'
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assert a#[-1..] == '9'
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assert a#[..-9] == '0'
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assert a#[-9..-7] == '12'
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assert a#[-2..] == '89'
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// empty string
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assert a#[-3..-4] == '' // start > end
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assert a#[20..] == '' // start > array.len
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assert a#[-20..-10] == '' // start+len < 0
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assert a#[20..-9] == '' // start > end && start > end
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//
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// test negative indexes in slices from github discussion
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//
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s := '0123456789'
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// normal behaviour
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assert s#[1..3] == '12'
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assert s#[..3] == '012'
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assert s#[8..] == '89'
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// negative indexes behaviour
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assert s#[-2..] == '89'
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assert s#[..-8] == '01'
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assert s#[2..-2] == '234567'
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assert s#[-12..-16] == ''
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assert s#[-8..-2] == '234567'
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// out of bound both indexes
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assert s#[12..14] == ''
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assert s#[-12..16] == '0123456789'
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}
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fn test_gated_mixed_strings() {
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//
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// test negative indexes in slices
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//
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a := [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
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// normal behaviour
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assert a#[1..3].str() == '[1, 2]'
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assert a#[..3].str() == '[0, 1, 2]'
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assert a#[8..].str() == '[8, 9]'
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// negative indexes behaviour
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assert a#[-2..].str() == '[8, 9]'
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assert a#[..-8].str() == '[0, 1]'
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assert a#[2..-2].str() == '[2, 3, 4, 5, 6, 7]'
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assert a#[-12..-16].str() == '[]'
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assert a#[-8..-2].str() == '[2, 3, 4, 5, 6, 7]'
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// out of bound both indexes
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assert a#[12..14].str() == '[]'
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assert a#[-12..16].str() == a.str()
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}
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