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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| package fn | ||
|
|
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| import ( | ||
| "fmt" | ||
| "reflect" | ||
| "runtime" | ||
| "strings" | ||
| ) | ||
|
|
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| func Name(v interface{}) (string, error) { | ||
| value := reflect.ValueOf(v) | ||
| if value.Kind() != reflect.Func { | ||
| return "", fmt.Errorf("%T is not func type", v) | ||
| } | ||
|
|
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| name := runtime.FuncForPC(value.Pointer()).Name() | ||
| if i := strings.LastIndex(name, "."); i != -1 { | ||
| return strings.TrimSuffix(name[i+1:], "-fm"), nil | ||
| } | ||
|
|
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| return "", fmt.Errorf("not found func name") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| package fn | ||
|
|
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| import ( | ||
| "fmt" | ||
| "testing" | ||
|
|
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| "github.com/stretchr/testify/require" | ||
| ) | ||
|
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| type s struct{} | ||
|
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| func f1(int) {} | ||
| func f2(...int) {} | ||
| func F3(int) {} | ||
| func F4(...int) {} | ||
| func (s) f1(int) {} | ||
| func (s) f2(...int) {} | ||
| func (s) F3(int) {} | ||
| func (s) F4(...int) {} | ||
|
|
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| func TestName(t *testing.T) { | ||
| type check struct { | ||
| input interface{} | ||
| expected string | ||
| err error | ||
| } | ||
|
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| checks := []check{ | ||
| {input: f1, expected: "f1", err: nil}, | ||
| {input: f2, expected: "f2", err: nil}, | ||
| {input: F3, expected: "F3", err: nil}, | ||
| {input: F4, expected: "F4", err: nil}, | ||
| {input: s{}.f1, expected: "f1", err: nil}, | ||
| {input: s{}.f2, expected: "f2", err: nil}, | ||
| {input: s{}.F3, expected: "F3", err: nil}, | ||
| {input: s{}.F4, expected: "F4", err: nil}, | ||
| {input: 1, expected: "", err: fmt.Errorf("int is not func type")}, | ||
| {input: true, expected: "", err: fmt.Errorf("bool is not func type")}, | ||
| } | ||
|
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| for _, c := range checks { | ||
| output, err := Name(c.input) | ||
| require.Equal(t, c.expected, output) | ||
| require.Equal(t, c.err, err) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| package fn | ||
|
|
||
| import ( | ||
| "context" | ||
| "time" | ||
| ) | ||
|
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| func Timeout(ctx context.Context, fn func() error, timeout time.Duration) error { | ||
| errChan := make(chan error) | ||
| ctx, cancel := context.WithTimeout(ctx, timeout) | ||
| defer cancel() | ||
|
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| go func() { | ||
| errChan <- fn() | ||
| close(errChan) | ||
| }() | ||
|
|
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| select { | ||
| case err := <-errChan: | ||
| return err | ||
| case <-ctx.Done(): | ||
| return ctx.Err() | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| package fn | ||
|
|
||
| import ( | ||
| "context" | ||
| "testing" | ||
| "time" | ||
|
|
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| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
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| type stringErr string | ||
|
|
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| func (e stringErr) Error() string { | ||
| return string(e) | ||
| } | ||
|
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| func TestTimeout(t *testing.T) { | ||
| genFunc := func(d time.Duration, err error) func() error { | ||
| return func() error { | ||
| time.Sleep(d) | ||
| return err | ||
| } | ||
| } | ||
|
|
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| type check struct { | ||
| input func() error | ||
| timeout time.Duration | ||
| expected error | ||
| } | ||
|
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| checks := []check{ | ||
| { | ||
| input: genFunc(time.Millisecond, nil), | ||
| timeout: time.Millisecond * 2, | ||
| expected: nil, | ||
| }, | ||
| { | ||
| input: genFunc(time.Millisecond, stringErr("func err")), | ||
| timeout: time.Millisecond * 2, | ||
| expected: stringErr("func err"), | ||
| }, | ||
| { | ||
| input: genFunc(time.Millisecond*2, stringErr("func err")), | ||
| timeout: time.Millisecond, | ||
| expected: context.DeadlineExceeded, | ||
| }, | ||
| } | ||
|
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| for i, c := range checks { | ||
| err := Timeout(context.Background(), c.input, c.timeout) | ||
| require.Equal(t, c.expected, err, "#%d check", i) | ||
| } | ||
|
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| ctx, cancel := context.WithCancel(context.Background()) | ||
| go func() { | ||
| time.Sleep(time.Millisecond * 50) | ||
| cancel() | ||
| }() | ||
| require.Equal(t, context.Canceled, Timeout(ctx, genFunc(time.Minute, nil), time.Hour)) | ||
| } |
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