53 lines
801 B
V
53 lines
801 B
V
fn test_empty_string_access() {
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mut res := ''
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a := ''
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if a[0] or { `0` } == `1` {
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res = 'good'
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} else {
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res = 'bad'
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}
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assert res == 'bad'
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}
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fn test_good_string_access() {
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mut res := ''
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a := 'abcd'
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if a[2] or { `0` } == `c` {
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res = 'good'
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} else {
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res = 'bad'
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}
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assert res == 'good'
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}
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fn test_if_guard_bad() {
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mut res := 'bad'
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a := 'xy'
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if z := a[2] {
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res = '${z:c}'
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}
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assert res == 'bad'
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}
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fn test_if_guard_good() {
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mut res := 'bad'
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a := 'xy123'
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if z := a[2] {
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res = '${z:c}'
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}
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assert res == '1'
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}
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fn get_propagate(s string, i int) ?string {
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c := s[i]?
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return 'got `${c:c}`'
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}
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fn test_propagation() {
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s := 'abcd'
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x := get_propagate(s, 2) or { '$err' }
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y := get_propagate(s, 5) or { '$err' }
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assert x == 'got `c`'
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assert y == 'string index out of range'
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}
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