opt.Optional[bool|string].MarshalJSON()
parent
a33304548a
commit
58bf264aa9
10
optional.go
10
optional.go
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@ -2,7 +2,6 @@ package opt
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import (
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"fmt"
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"encoding/json"
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)
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// Optional represents an optional value.
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@ -170,15 +169,6 @@ func (receiver Optional[T]) GoString() string {
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return fmt.Sprintf("opt.Something[%T](%#v)", receiver.value, receiver.value)
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}
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// MarshalJSON makes it so json.Marshaler is implemented.
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func (receiver Optional[string]) MarshalJSON() ([]byte, error) {
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if !receiver.something {
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return nil, fmt.Errorf("cannot marshal opt.Nothing[%T]()", receiver.value)
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}
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return json.Marshal(receiver.value)
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}
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// WhenNothing will call ‘fn’ when ‘receiver’ is holding nothing.
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//
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// It will not call ‘fn’ when ‘receier’ is hold something.
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@ -0,0 +1,19 @@
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package opt
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import (
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"fmt"
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"encoding/json"
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)
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type jsonMarshaler interface {
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bool | string
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}
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// MarshalJSON makes it so json.Marshaler is implemented.
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func (receiver Optional[jsonMarshal]) MarshalJSON() ([]byte, error) {
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if !receiver.something {
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return nil, fmt.Errorf("cannot marshal opt.Nothing[%T]()", receiver.value)
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}
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return json.Marshal(receiver.value)
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}
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@ -0,0 +1,46 @@
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package opt_test
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import (
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"testing"
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"sourcecode.social/reiver/go-opt"
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)
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func TestOptional_MarshalJSON_bool(t *testing.T) {
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tests := []struct{
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Value opt.Optional[bool]
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Expected string
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}{
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{
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Value: opt.Something(false),
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Expected: "false",
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},
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{
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Value: opt.Something(true),
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Expected: "true",
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},
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}
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for testNumber, test := range tests {
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actualBytes, err := test.Value.MarshalJSON()
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if nil != err {
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t.Errorf("For test #%d, did not expect an error but actually got one." , testNumber)
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t.Logf("ERROR: (%T) %s", err, err)
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t.Logf("VALUE: %#v", test.Value)
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continue
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}
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actual := string(actualBytes)
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expected := test.Expected
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if expected != actual {
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t.Errorf("For test #%d, the actual value for the JSON marshaling is not what was expected.", testNumber)
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t.Logf("EXPECTED: %q", expected)
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t.Logf("ACTUAL: %q", actual)
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t.Logf("VALUE: %#v", test.Value)
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continue
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}
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}
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}
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@ -0,0 +1,105 @@
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package opt_test
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import (
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"testing"
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"sourcecode.social/reiver/go-opt"
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)
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func TestOptional_MarshalJSON_string(t *testing.T) {
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tests := []struct{
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Value opt.Optional[string]
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Expected string
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}{
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{
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Value: opt.Something(""),
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Expected: `""`,
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},
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{
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Value: opt.Something("apple"),
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Expected: `"apple"`,
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},
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{
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Value: opt.Something("banana"),
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Expected: `"banana"`,
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},
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{
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Value: opt.Something("cherry"),
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Expected: `"cherry"`,
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},
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{
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Value: opt.Something("ONCE"),
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Expected: `"ONCE"`,
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},
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{
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Value: opt.Something("TWICE"),
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Expected: `"TWICE"`,
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},
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{
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Value: opt.Something("THRICE"),
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Expected: `"THRICE"`,
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},
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{
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Value: opt.Something("FOURCE"),
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Expected: `"FOURCE"`,
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},
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{
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Value: opt.Something("🙂"),
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Expected: `"🙂"`,
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},
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{
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Value: opt.Something("😈"),
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Expected: `"😈"`,
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},
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{
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Value: opt.Something("❤️"),
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Expected: `"❤️"`,
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},
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{
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Value: opt.Something("٠١٢٣۴۵۶٧٨٩"),
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Expected: `"٠١٢٣۴۵۶٧٨٩"`,
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},
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{
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Value: opt.Something("𐏑𐏓𐏕"),
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Expected: `"𐏑𐏓𐏕"`,
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},
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}
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for testNumber, test := range tests {
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actualBytes, err := test.Value.MarshalJSON()
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if nil != err {
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t.Errorf("For test #%d, did not expect an error but actually got one." , testNumber)
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t.Logf("ERROR: (%T) %s", err, err)
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t.Logf("VALUE: %#v", test.Value)
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continue
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}
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actual := string(actualBytes)
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expected := test.Expected
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if expected != actual {
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t.Errorf("For test #%d, the actual value for the JSON marshaling is not what was expected.", testNumber)
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t.Logf("EXPECTED: %q", expected)
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t.Logf("ACTUAL: %q", actual)
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t.Logf("VALUE: %#v", test.Value)
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continue
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}
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}
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}
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