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Merge pull request #209 from jxsl13/fix-issue-200
Closes #200
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| package koanf_test | ||
|
|
||
| import ( | ||
| "encoding" | ||
| "fmt" | ||
| "strings" | ||
| "testing" | ||
|
|
||
| "github.com/knadh/koanf/providers/env" | ||
| "github.com/knadh/koanf/providers/structs" | ||
| "github.com/knadh/koanf/v2" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| func TestTextUnmarshalStringFixed(t *testing.T) { | ||
| defer func() { | ||
| assert.Nil(t, recover()) | ||
| }() | ||
|
|
||
| type targetStruct struct { | ||
| LogFormatPointer LogFormatPointer // default should map to json | ||
| LogFormatValue LogFormatValue // default should map to json | ||
| } | ||
|
|
||
| target := &targetStruct{"text_custom", "text_custom"} | ||
| before := *target | ||
|
|
||
| var ( | ||
| bptr interface{} = &(target.LogFormatPointer) | ||
| cptr interface{} = target.LogFormatValue | ||
| ) | ||
| _, ok := (bptr).(encoding.TextMarshaler) | ||
| assert.True(t, ok) | ||
|
|
||
| _, ok = (cptr).(encoding.TextMarshaler) | ||
| assert.True(t, ok) | ||
|
|
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| k := koanf.New(".") | ||
| k.Load(structs.Provider(target, "koanf"), nil) | ||
|
|
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| k.Load(env.Provider("", ".", func(s string) string { | ||
| return strings.Replace(strings.ToLower(s), "_", ".", -1) | ||
| }), nil) | ||
|
|
||
| // default values | ||
| err := k.Unmarshal("", &target) | ||
| assert.NoError(t, err) | ||
| assert.Equal(t, &before, target) | ||
| } | ||
|
|
||
| // LogFormatValue is a custom string type that implements the TextUnmarshaler interface | ||
| // Additionally it implements the TextMarshaler interface (value receiver) | ||
| type LogFormatValue string | ||
|
|
||
| // pointer receiver | ||
| func (c *LogFormatValue) UnmarshalText(data []byte) error { | ||
| switch strings.ToLower(string(data)) { | ||
| case "", "json": | ||
| *c = "json_custom" | ||
| case "text": | ||
| *c = "text_custom" | ||
| default: | ||
| return fmt.Errorf("invalid log format: %s", string(data)) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // value receiver | ||
| func (c LogFormatValue) MarshalText() ([]byte, error) { | ||
| //overcomplicated custom internal string representation | ||
| switch c { | ||
| case "", "json_custom": | ||
| return []byte("json"), nil | ||
| case "text_custom": | ||
| return []byte("text"), nil | ||
| } | ||
| return nil, fmt.Errorf("invalid internal string representation: %q", c) | ||
| } | ||
|
|
||
| // LogFormatPointer is a custom string type that implements the TextUnmarshaler interface | ||
| // Additionally it implements the TextMarshaler interface (pointer receiver) | ||
| type LogFormatPointer string | ||
|
|
||
| // pointer receiver | ||
| func (c *LogFormatPointer) UnmarshalText(data []byte) error { | ||
| switch strings.ToLower(string(data)) { | ||
| case "", "json": | ||
| *c = "json_custom" | ||
| case "text": | ||
| *c = "text_custom" | ||
| default: | ||
| return fmt.Errorf("invalid log format: %s", string(data)) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // also pointer receiver | ||
| func (c *LogFormatPointer) MarshalText() ([]byte, error) { | ||
| //overcomplicated custom internal string representation | ||
| switch *c { | ||
| case "", "json_custom": | ||
| return []byte("json"), nil | ||
| case "text_custom": | ||
| return []byte("text"), nil | ||
| } | ||
| return nil, fmt.Errorf("invalid internal string representation: %q", *c) | ||
| } |