diff options
| -rw-r--r-- | usage.go | 2 | ||||
| -rw-r--r-- | usage_test.go | 32 |
2 files changed, 33 insertions, 1 deletions
@@ -301,7 +301,7 @@ func (p *Parser) printOption(w io.Writer, spec *spec) { ways = append(ways, synopsis(spec, "-"+spec.short)) } if len(ways) > 0 { - printTwoCols(w, strings.Join(ways, ", "), spec.help, spec.defaultVal, spec.env) + printTwoCols(w, strings.Join(ways, ", "), spec.help, spec.defaultString, spec.env) } } diff --git a/usage_test.go b/usage_test.go index 10072c1..8fb32c8 100644 --- a/usage_test.go +++ b/usage_test.go @@ -601,3 +601,35 @@ error: something went wrong assert.Equal(t, expectedStdout[1:], b.String()) assert.Equal(t, -1, exitCode) } + +type lengthOf struct { + Length int +} + +func (p *lengthOf) UnmarshalText(b []byte) error { + p.Length = len(b) + return nil +} + +func TestHelpShowsDefaultValueFromOriginalTag(t *testing.T) { + // check that the usage text prints the original string from the default tag, not + // the serialization of the parsed value + + expectedHelp := ` +Usage: example [--test TEST] + +Options: + --test TEST [default: some_default_value] + --help, -h display this help and exit +` + + var args struct { + Test *lengthOf `default:"some_default_value"` + } + p, err := NewParser(Config{Program: "example"}, &args) + require.NoError(t, err) + + var help bytes.Buffer + p.WriteHelp(&help) + assert.Equal(t, expectedHelp[1:], help.String()) +} |