go-opt/optional_filter_test.go

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package opt_test
import (
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"github.com/reiver/go-opt"
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"testing"
)
func TestOptional_Filter_int(t *testing.T) {
tests := []struct{
Optional opt.Optional[int]
Expected opt.Optional[int]
}{
{
Optional: opt.Nothing[int](),
Expected: opt.Nothing[int](),
},
{
Optional: opt.Something[int](-2),
Expected: opt.Something[int](-2),
},
{
Optional: opt.Something[int](-1),
Expected: opt.Nothing[int](),
},
{
Optional: opt.Something[int](0),
Expected: opt.Something[int](0),
},
{
Optional: opt.Something[int](1),
Expected: opt.Nothing[int](),
},
{
Optional: opt.Something[int](2),
Expected: opt.Something[int](2),
},
}
for testNumber, test := range tests {
fn := func(value int) bool {
return 0 == (value % 2)
}
actual := test.Optional.Filter(fn)
expected := test.Expected
if expected != actual {
t.Errorf("For test #%d, the actual value is not what was expected.", testNumber)
t.Logf("EXPECTED: %#v", expected)
t.Logf("ACTUAL: %#v", actual)
/////////////// CONTINUE
continue
}
}
}