1 files changed, 25 insertions, 2 deletions
diff --git a/parse_test.go b/parse_test.go
index d53b483..5bc781c 100644
--- a/parse_test.go
+++ b/parse_test.go
@@ -692,6 +692,21 @@ func TestMustParse(t *testing.T) {
 	assert.NotNil(t, parser)
 }
 
+func TestMustParseError(t *testing.T) {
+	var args struct {
+		Foo []string `default:""`
+	}
+	var exitCode int
+	var stdout bytes.Buffer
+	mustParseExit = func(code int) { exitCode = code }
+	mustParseOut = &stdout
+	os.Args = []string{"example"}
+	parser := MustParse(&args)
+	assert.Nil(t, parser)
+	assert.Equal(t, 2, exitCode)
+	assert.Contains(t, stdout.String(), "default values are not supported for slice or map fields")
+}
+
 func TestEnvironmentVariable(t *testing.T) {
 	var args struct {
 		Foo string `arg:"env"`
@@ -906,7 +921,7 @@ func TestParserMustParse(t *testing.T) {
 	}{
 		{name: "help", args: struct{}{}, cmdLine: []string{"--help"}, code: 0, output: "display this help and exit"},
 		{name: "version", args: versioned{}, cmdLine: []string{"--version"}, code: 0, output: "example 3.2.1"},
-		{name: "invalid", args: struct{}{}, cmdLine: []string{"invalid"}, code: -1, output: ""},
+		{name: "invalid", args: struct{}{}, cmdLine: []string{"invalid"}, code: 2, output: ""},
 	}
 
 	for _, tt := range tests {
@@ -1556,7 +1571,7 @@ func TestMustParseInvalidParser(t *testing.T) {
 	}
 	parser := mustParse(Config{Out: &stdout, Exit: exit}, &args)
 	assert.Nil(t, parser)
-	assert.Equal(t, -1, exitCode)
+	assert.Equal(t, 2, exitCode)
 }
 
 func TestMustParsePrintsHelp(t *testing.T) {
@@ -1737,3 +1752,11 @@ func TestSubcommandGlobalFlag_InCommand_Strict_Inner(t *testing.T) {
 	require.NotNil(t, args.Sub)
 	assert.True(t, args.Sub.Guard)
 }
+
+func TestExitFunctionAndOutStreamGetFilledIn(t *testing.T) {
+	var args struct{}
+	p, err := NewParser(Config{}, &args)
+	require.NoError(t, err)
+	assert.NotNil(t, p.config.Exit) // go prohibits function pointer comparison
+	assert.Equal(t, p.config.Out, os.Stdout)
+}