89 lines
1.5 KiB
Go
89 lines
1.5 KiB
Go
package opt_test
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import (
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"sourcecode.social/reiver/go-opt"
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"testing"
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)
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func TestThen_stringToUint(t *testing.T) {
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tests := []struct{
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Optional opt.Optional[string]
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Expected opt.Optional[byte]
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}{
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{
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Optional: opt.Nothing[string](),
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Expected: opt.Nothing[byte](),
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},
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{
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Optional: opt.Something(""),
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Expected: opt.Nothing[byte](),
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},
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{
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Optional: opt.Something("A"),
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Expected: opt.Nothing[byte](),
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},
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{
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Optional: opt.Something("B"),
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Expected: opt.Nothing[byte](),
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},
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{
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Optional: opt.Something("C"),
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Expected: opt.Nothing[byte](),
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},
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{
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Optional: opt.Something("once"),
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Expected: opt.Something[byte]('n'),
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},
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{
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Optional: opt.Something("twice"),
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Expected: opt.Something[byte]('w'),
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},
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{
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Optional: opt.Something("thrice"),
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Expected: opt.Something[byte]('h'),
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},
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{
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Optional: opt.Something("fource"),
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Expected: opt.Something[byte]('o'),
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},
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}
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for testNumber, test := range tests {
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fn := func(s string) opt.Optional[byte] {
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if len(s) < 2 {
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return opt.Nothing[byte]()
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}
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return opt.Something[byte](s[1])
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}
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thened := opt.Then(test.Optional, fn)
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{
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expected := test.Expected
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actual := thened
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if expected != actual {
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t.Errorf("For test #%d, the actual value is not what was expected.", testNumber)
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t.Logf("EXPECTED: (%T) %#v", expected, expected)
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t.Logf("ACTUAL: (%T) %#v", actual, actual)
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t.Logf("OPTIONAL: (%T), %#v", test.Optional, test.Optional)
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/////////////////////// CONTINUE
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continue
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}
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}
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}
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}
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