Optional long arguments

1 files changed, 19 insertions, 0 deletions

diff --git a/usage_test.go b/usage_test.go
index 5d379a1..de40ebd 100644
--- a/usage_test.go
+++ b/usage_test.go
@@ -309,3 +309,22 @@ Global options:
 	p.WriteHelp(&help)
 	assert.Equal(t, expectedHelp, help.String())
 }
+
+func TestUsageWithOptionalLongNames(t *testing.T) {
+	expectedHelp := `Usage: example [-a PLACEHOLDER] -b SHORTONLY2
+
+Options:
+  -a PLACEHOLDER         some help [default: some val]
+  -b SHORTONLY2          some help2
+  --help, -h             display this help and exit
+`
+	var args struct {
+		ShortOnly  string `arg:"-a,--" help:"some help" default:"some val" placeholder:"PLACEHOLDER"`
+		ShortOnly2 string `arg:"-b,--,required" help:"some help2"`
+	}
+	p, err := NewParser(Config{Program: "example"}, &args)
+	assert.NoError(t, err)
+	var help bytes.Buffer
+	p.WriteHelp(&help)
+	assert.Equal(t, expectedHelp, help.String())
+}