67 lines
1018 B
V
67 lines
1018 B
V
fn f(n int) ?int {
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if n < 0 {
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return error('negative arg')
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}
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return n
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}
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fn test_lhs_option() {
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mut a := [0, 1, 2, 3, 4]
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a[f(-1) or { 2 }] = 7
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assert a == [0, 1, 7, 3, 4]
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}
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fn ret_no_opt(n int) int {
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return f(n) or { panic(err) }
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}
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fn test_opt_return_no_opt() {
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aa := ret_no_opt(3)
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assert aa == 3
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}
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fn test_range_for_and_array_push() {
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mut a := []int{}
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for n in f(-3) or { -1 } .. f(3) or { 12 } {
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a << f(n) or { -5 }
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}
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assert a == [-5, 0, 1, 2]
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}
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fn test_channel_push() {
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ch := chan f64{cap: 2}
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ch <- 12.25
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ch.close()
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mut res := []f64{cap: 3}
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for _ in 0 .. 3 {
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res << <-ch or { -6.75 }
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}
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assert res == [12.25, -6.75, -6.75]
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}
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fn test_thread_wait() {
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thrs := [
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go f(3),
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go f(-7),
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go f(12),
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]
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mut res := []int{cap: 3}
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for t in thrs {
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res << t.wait() or { -13 }
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}
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assert res == [3, -13, 12]
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}
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fn test_nested_opt() {
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a := f(f(f(-3) or { -7 }) or { 4 }) or { 17 }
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assert a == 4
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}
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fn foo() ?string {
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return 'hi'
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}
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fn test_opt_subexp_field() ? {
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assert foo() ?.len == 2
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}
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