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https://github.com/spf13/cobra
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considering stderr in UsageString
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parent
e35034f0da
commit
b635726081
2 changed files with 26 additions and 1 deletions
11
command.go
11
command.go
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@ -384,13 +384,22 @@ func (c *Command) Help() error {
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return nil
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}
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// UsageString return usage string.
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// UsageString returns usage string.
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func (c *Command) UsageString() string {
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// Storing normal writers
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tmpOutput := c.outWriter
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tmpErr := c.errWriter
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bb := new(bytes.Buffer)
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c.outWriter = bb
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c.errWriter = bb
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c.Usage()
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// Setting things back to normal
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c.outWriter = tmpOutput
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c.errWriter = tmpErr
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return bb.String()
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}
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@ -1405,6 +1405,22 @@ func TestSetIn(t *testing.T) {
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}
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}
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func TestUsageStringRedirected(t *testing.T) {
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c := &Command{}
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c.usageFunc = func(cmd *Command) error {
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cmd.Print("[stdout1]")
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cmd.PrintErr("[stderr2]")
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cmd.Print("[stdout3]")
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return nil;
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}
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expected := "[stdout1][stderr2][stdout3]"
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if got := c.UsageString(); got != expected {
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t.Errorf("Expected usage string to consider both stdout and stderr")
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}
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}
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func TestFlagErrorFunc(t *testing.T) {
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c := &Command{Use: "c", Run: emptyRun}
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