README
¶
go-capturer
Capture os.Stdout and/or os.Stderr in Go.
This package is useful for writing tests which print some outputs using fmt package.
Usage
This package provides CaptureStdout(), CaptureStderr() and CaptureOutput() functions to capture outputs.
package main
import (
"fmt"
"os"
"github.com/kami-zh/go-capturer"
)
func ExampleCaptureStdout() {
out := capturer.CaptureStdout(func() {
fmt.Fprint(os.Stdout, "foo")
})
fmt.Println(out)
// Output: foo
}
func ExampleCaptureStderr() {
out := capturer.CaptureStderr(func() {
fmt.Fprint(os.Stderr, "bar")
})
fmt.Println(out)
// Output: bar
}
func ExampleCaptureOutput() {
out := capturer.CaptureOutput(func() {
fmt.Fprint(os.Stdout, "foo")
fmt.Fprint(os.Stderr, "bar")
})
fmt.Println(out)
// Output: foobar
}
Installation
$ go get github.com/kami-zh/go-capturer
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/kami-zh/go-capturer.
License
The package is available as open source under the terms of the MIT License.
Documentation
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Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func CaptureOutput ¶
func CaptureOutput(f func()) string
CaptureOutput captures stdout and stderr.
Example ¶
out := CaptureOutput(func() {
fmt.Fprint(os.Stdout, "foo")
fmt.Fprint(os.Stderr, "bar")
})
fmt.Println(out)
Output: foobar
func CaptureStderr ¶
func CaptureStderr(f func()) string
CaptureStderr captures stderr.
Example ¶
out := CaptureStderr(func() {
fmt.Fprint(os.Stderr, "bar")
})
fmt.Println(out)
Output: bar
func CaptureStdout ¶
func CaptureStdout(f func()) string
CaptureStdout captures stdout.
Example ¶
out := CaptureStdout(func() {
fmt.Fprint(os.Stdout, "foo")
})
fmt.Println(out)
Output: foo
Types ¶
Source Files
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