opt.Optional[T].IsNothing() opt.Optional[T].IsSomething()

optional_isnothing.go

@@ -0,0 +1,5 @@
+package opt
+
+func (receiver Optional[T]) IsNothing() bool {
+	return !(receiver.something)
+}

optional_isnothing_int_test.go

@@ -0,0 +1,91 @@
+package opt_test
+
+import (
+	"testing"
+
+	"sourcecode.social/reiver/go-opt"
+)
+
+func TestOptional_IsNothing_int(t *testing.T) {
+	tests := []struct{
+		Optional opt.Optional[int]
+		Expected bool
+	}{
+		{
+			Optional: opt.Nothing[int](),
+			Expected: true,
+		},
+
+
+
+		{
+			Optional: opt.Something(-255),
+			Expected: false,
+		},
+
+		{
+			Optional: opt.Something(-5),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(-4),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(-3),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(-2),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(-1),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(0),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(1),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(2),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(3),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(4),
+			Expected: false,
+		},
+		{
+			Optional: opt.Something(5),
+			Expected: false,
+		},
+
+		{
+			Optional: opt.Something(255),
+			Expected: false,
+		},
+	}
+
+	for testNumber, test := range tests {
+
+		actual := test.Optional.IsNothing()
+
+		expected := test.Expected
+
+		if expected != actual {
+			t.Errorf("For test #%d, the actual value of is-nothing it not what was expected.", testNumber)
+			t.Logf("EXPECTED: %t", expected)
+			t.Logf("ACTUAL:   %t", actual)
+			t.Logf("OPTIONAL: %#v", test.Optional)
+			continue
+		}
+	}
+}

optional_issomething.go

@@ -0,0 +1,5 @@
+package opt
+
+func (receiver Optional[T]) IsSomething() bool {
+	return receiver.something
+}

optional_issomething_int_test.go

@@ -0,0 +1,91 @@
+package opt_test
+
+import (
+	"testing"
+
+	"sourcecode.social/reiver/go-opt"
+)
+
+func TestOptional_IsSomething_int(t *testing.T) {
+	tests := []struct{
+		Optional opt.Optional[int]
+		Expected bool
+	}{
+		{
+			Optional: opt.Nothing[int](),
+			Expected: false,
+		},
+
+
+
+		{
+			Optional: opt.Something(-255),
+			Expected: true,
+		},
+
+		{
+			Optional: opt.Something(-5),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(-4),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(-3),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(-2),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(-1),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(0),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(1),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(2),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(3),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(4),
+			Expected: true,
+		},
+		{
+			Optional: opt.Something(5),
+			Expected: true,
+		},
+
+		{
+			Optional: opt.Something(255),
+			Expected: true,
+		},
+	}
+
+	for testNumber, test := range tests {
+
+		actual := test.Optional.IsSomething()
+
+		expected := test.Expected
+
+		if expected != actual {
+			t.Errorf("For test #%d, the actual value of is-something it not what was expected.", testNumber)
+			t.Logf("EXPECTED: %t", expected)
+			t.Logf("ACTUAL:   %t", actual)
+			t.Logf("OPTIONAL: %#v", test.Optional)
+			continue
+		}
+	}
+}