package nul_test import ( "testing" "sourcecode.social/reiver/go-nul" ) func TestOptional_Filter_int(t *testing.T) { tests := []struct{ Nullable nul.Nullable[int] Expected nul.Nullable[int] }{ { Nullable: nul.Nothing[int](), Expected: nul.Nothing[int](), }, { Nullable: nul.Something[int](-2), Expected: nul.Something[int](-2), }, { Nullable: nul.Something[int](-1), Expected: nul.Nothing[int](), }, { Nullable: nul.Something[int](0), Expected: nul.Something[int](0), }, { Nullable: nul.Something[int](1), Expected: nul.Nothing[int](), }, { Nullable: nul.Something[int](2), Expected: nul.Something[int](2), }, } for testNumber, test := range tests { fn := func(value int) bool { return 0 == (value % 2) } actual := test.Nullable.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 } } }