1 files changed, 74 insertions, 0 deletions
diff --git a/printusage_test.go b/printusage_test.go
new file mode 100644
index 0000000..df982aa
--- /dev/null
+++ b/printusage_test.go
@@ -0,0 +1,74 @@
+package pflag
+
+import (
+	"bytes"
+	"io"
+	"testing"
+)
+
+const expectedOutput = `      --long-form    Some description
+      --long-form2   Some description
+                       with multiline
+  -s, --long-name    Some description
+  -t, --long-name2   Some description with
+                       multiline
+`
+
+func setUpPFlagSet(buf io.Writer) *FlagSet {
+	f := NewFlagSet("test", ExitOnError)
+	f.Bool("long-form", false, "Some description")
+	f.Bool("long-form2", false, "Some description\n  with multiline")
+	f.BoolP("long-name", "s", false, "Some description")
+	f.BoolP("long-name2", "t", false, "Some description with\n  multiline")
+	f.SetOutput(buf)
+	return f
+}
+
+func TestPrintUsage(t *testing.T) {
+	buf := bytes.Buffer{}
+	f := setUpPFlagSet(&buf)
+	f.PrintDefaults()
+	res := buf.String()
+	if res != expectedOutput {
+		t.Errorf("Expected \n%s \nActual \n%s", expectedOutput, res)
+	}
+}
+
+func setUpPFlagSet2(buf io.Writer) *FlagSet {
+	f := NewFlagSet("test", ExitOnError)
+	f.Bool("long-form", false, "Some description")
+	f.Bool("long-form2", false, "Some description\n  with multiline")
+	f.BoolP("long-name", "s", false, "Some description")
+	f.BoolP("long-name2", "t", false, "Some description with\n  multiline")
+	f.StringP("some-very-long-arg", "l", "test", "Some very long description having break the limit")
+	f.StringP("other-very-long-arg", "o", "long-default-value", "Some very long description having break the limit")
+	f.String("some-very-long-arg2", "very long default value", "Some very long description\nwith line break\nmultiple")
+	f.SetOutput(buf)
+	return f
+}
+
+const expectedOutput2 = `      --long-form                    Some description
+      --long-form2                   Some description
+                                       with multiline
+  -s, --long-name                    Some description
+  -t, --long-name2                   Some description with
+                                       multiline
+  -o, --other-very-long-arg string   Some very long description having
+                                     break the limit (default
+                                     "long-default-value")
+  -l, --some-very-long-arg string    Some very long description having
+                                     break the limit (default "test")
+      --some-very-long-arg2 string   Some very long description
+                                     with line break
+                                     multiple (default "very long default
+                                     value")
+`
+
+func TestPrintUsage_2(t *testing.T) {
+	buf := bytes.Buffer{}
+	f := setUpPFlagSet2(&buf)
+	res := f.FlagUsagesWrapped(80)
+	if res != expectedOutput2 {
+		t.Errorf("Expected \n%q \nActual \n%q", expectedOutput2, res)
+	}
+}