mirror of
https://github.com/rclone/rclone.git
synced 2024-12-05 07:20:35 +08:00
206 lines
5.3 KiB
Go
206 lines
5.3 KiB
Go
package errors_test
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
func ExampleNew() {
|
|
err := errors.New("whoops")
|
|
fmt.Println(err)
|
|
|
|
// Output: whoops
|
|
}
|
|
|
|
func ExampleNew_printf() {
|
|
err := errors.New("whoops")
|
|
fmt.Printf("%+v", err)
|
|
|
|
// Example output:
|
|
// whoops
|
|
// github.com/pkg/errors_test.ExampleNew_printf
|
|
// /home/dfc/src/github.com/pkg/errors/example_test.go:17
|
|
// testing.runExample
|
|
// /home/dfc/go/src/testing/example.go:114
|
|
// testing.RunExamples
|
|
// /home/dfc/go/src/testing/example.go:38
|
|
// testing.(*M).Run
|
|
// /home/dfc/go/src/testing/testing.go:744
|
|
// main.main
|
|
// /github.com/pkg/errors/_test/_testmain.go:106
|
|
// runtime.main
|
|
// /home/dfc/go/src/runtime/proc.go:183
|
|
// runtime.goexit
|
|
// /home/dfc/go/src/runtime/asm_amd64.s:2059
|
|
}
|
|
|
|
func ExampleWithMessage() {
|
|
cause := errors.New("whoops")
|
|
err := errors.WithMessage(cause, "oh noes")
|
|
fmt.Println(err)
|
|
|
|
// Output: oh noes: whoops
|
|
}
|
|
|
|
func ExampleWithStack() {
|
|
cause := errors.New("whoops")
|
|
err := errors.WithStack(cause)
|
|
fmt.Println(err)
|
|
|
|
// Output: whoops
|
|
}
|
|
|
|
func ExampleWithStack_printf() {
|
|
cause := errors.New("whoops")
|
|
err := errors.WithStack(cause)
|
|
fmt.Printf("%+v", err)
|
|
|
|
// Example Output:
|
|
// whoops
|
|
// github.com/pkg/errors_test.ExampleWithStack_printf
|
|
// /home/fabstu/go/src/github.com/pkg/errors/example_test.go:55
|
|
// testing.runExample
|
|
// /usr/lib/go/src/testing/example.go:114
|
|
// testing.RunExamples
|
|
// /usr/lib/go/src/testing/example.go:38
|
|
// testing.(*M).Run
|
|
// /usr/lib/go/src/testing/testing.go:744
|
|
// main.main
|
|
// github.com/pkg/errors/_test/_testmain.go:106
|
|
// runtime.main
|
|
// /usr/lib/go/src/runtime/proc.go:183
|
|
// runtime.goexit
|
|
// /usr/lib/go/src/runtime/asm_amd64.s:2086
|
|
// github.com/pkg/errors_test.ExampleWithStack_printf
|
|
// /home/fabstu/go/src/github.com/pkg/errors/example_test.go:56
|
|
// testing.runExample
|
|
// /usr/lib/go/src/testing/example.go:114
|
|
// testing.RunExamples
|
|
// /usr/lib/go/src/testing/example.go:38
|
|
// testing.(*M).Run
|
|
// /usr/lib/go/src/testing/testing.go:744
|
|
// main.main
|
|
// github.com/pkg/errors/_test/_testmain.go:106
|
|
// runtime.main
|
|
// /usr/lib/go/src/runtime/proc.go:183
|
|
// runtime.goexit
|
|
// /usr/lib/go/src/runtime/asm_amd64.s:2086
|
|
}
|
|
|
|
func ExampleWrap() {
|
|
cause := errors.New("whoops")
|
|
err := errors.Wrap(cause, "oh noes")
|
|
fmt.Println(err)
|
|
|
|
// Output: oh noes: whoops
|
|
}
|
|
|
|
func fn() error {
|
|
e1 := errors.New("error")
|
|
e2 := errors.Wrap(e1, "inner")
|
|
e3 := errors.Wrap(e2, "middle")
|
|
return errors.Wrap(e3, "outer")
|
|
}
|
|
|
|
func ExampleCause() {
|
|
err := fn()
|
|
fmt.Println(err)
|
|
fmt.Println(errors.Cause(err))
|
|
|
|
// Output: outer: middle: inner: error
|
|
// error
|
|
}
|
|
|
|
func ExampleWrap_extended() {
|
|
err := fn()
|
|
fmt.Printf("%+v\n", err)
|
|
|
|
// Example output:
|
|
// error
|
|
// github.com/pkg/errors_test.fn
|
|
// /home/dfc/src/github.com/pkg/errors/example_test.go:47
|
|
// github.com/pkg/errors_test.ExampleCause_printf
|
|
// /home/dfc/src/github.com/pkg/errors/example_test.go:63
|
|
// testing.runExample
|
|
// /home/dfc/go/src/testing/example.go:114
|
|
// testing.RunExamples
|
|
// /home/dfc/go/src/testing/example.go:38
|
|
// testing.(*M).Run
|
|
// /home/dfc/go/src/testing/testing.go:744
|
|
// main.main
|
|
// /github.com/pkg/errors/_test/_testmain.go:104
|
|
// runtime.main
|
|
// /home/dfc/go/src/runtime/proc.go:183
|
|
// runtime.goexit
|
|
// /home/dfc/go/src/runtime/asm_amd64.s:2059
|
|
// github.com/pkg/errors_test.fn
|
|
// /home/dfc/src/github.com/pkg/errors/example_test.go:48: inner
|
|
// github.com/pkg/errors_test.fn
|
|
// /home/dfc/src/github.com/pkg/errors/example_test.go:49: middle
|
|
// github.com/pkg/errors_test.fn
|
|
// /home/dfc/src/github.com/pkg/errors/example_test.go:50: outer
|
|
}
|
|
|
|
func ExampleWrapf() {
|
|
cause := errors.New("whoops")
|
|
err := errors.Wrapf(cause, "oh noes #%d", 2)
|
|
fmt.Println(err)
|
|
|
|
// Output: oh noes #2: whoops
|
|
}
|
|
|
|
func ExampleErrorf_extended() {
|
|
err := errors.Errorf("whoops: %s", "foo")
|
|
fmt.Printf("%+v", err)
|
|
|
|
// Example output:
|
|
// whoops: foo
|
|
// github.com/pkg/errors_test.ExampleErrorf
|
|
// /home/dfc/src/github.com/pkg/errors/example_test.go:101
|
|
// testing.runExample
|
|
// /home/dfc/go/src/testing/example.go:114
|
|
// testing.RunExamples
|
|
// /home/dfc/go/src/testing/example.go:38
|
|
// testing.(*M).Run
|
|
// /home/dfc/go/src/testing/testing.go:744
|
|
// main.main
|
|
// /github.com/pkg/errors/_test/_testmain.go:102
|
|
// runtime.main
|
|
// /home/dfc/go/src/runtime/proc.go:183
|
|
// runtime.goexit
|
|
// /home/dfc/go/src/runtime/asm_amd64.s:2059
|
|
}
|
|
|
|
func Example_stackTrace() {
|
|
type stackTracer interface {
|
|
StackTrace() errors.StackTrace
|
|
}
|
|
|
|
err, ok := errors.Cause(fn()).(stackTracer)
|
|
if !ok {
|
|
panic("oops, err does not implement stackTracer")
|
|
}
|
|
|
|
st := err.StackTrace()
|
|
fmt.Printf("%+v", st[0:2]) // top two frames
|
|
|
|
// Example output:
|
|
// github.com/pkg/errors_test.fn
|
|
// /home/dfc/src/github.com/pkg/errors/example_test.go:47
|
|
// github.com/pkg/errors_test.Example_stackTrace
|
|
// /home/dfc/src/github.com/pkg/errors/example_test.go:127
|
|
}
|
|
|
|
func ExampleCause_printf() {
|
|
err := errors.Wrap(func() error {
|
|
return func() error {
|
|
return errors.Errorf("hello %s", fmt.Sprintf("world"))
|
|
}()
|
|
}(), "failed")
|
|
|
|
fmt.Printf("%v", err)
|
|
|
|
// Output: failed: hello world
|
|
}
|