fix: panic due to invalid user input

generator/faker.go

@@ -35,7 +35,7 @@ func (s service) ReplaceStringWithFakerWhenRequested(request string) (string, er
 	}
 
 	a := strings.Split(request, ".")
-	if len(a) == 1 {
+	if len(a) < 2 {
 		return request,
 			errors.New("requires more arguments to get a faker func")
 	}
@@ -51,6 +51,11 @@ func (s service) ReplaceStringWithFakerWhenRequested(request string) (string, er
 	if len(a) == FakerShortLen {
 		argsString := strings.Split(a[1], "(")
 
+		if len(argsString) < 2 {
+			return request,
+				errors.New("requires more arguments to get a faker func")
+		}
+
 		args, dErr := getMethodArguments(
 			&s.faker,
 			argsString[0],
@@ -74,6 +79,11 @@ func (s service) ReplaceStringWithFakerWhenRequested(request string) (string, er
 
 	argsString := strings.Split(a[2], "(")
 
+	if len(argsString) < 2 {
+		return request,
+			errors.New("requires more arguments to get a faker func")
+	}
+
 	obj := reflect.Indirect(res[0]).Interface()
 
 	args, err := getMethodArguments(

generator/faker_test.go

@@ -9,6 +9,7 @@ const (
 )
 
 func Test_service_ReplaceStringWithFakerWhenRequested(t *testing.T) {
+	t.Parallel()
 	type args struct {
 		request string
 	}
@@ -82,6 +83,8 @@ func Test_service_ReplaceStringWithFakerWhenRequested(t *testing.T) {
 }
 
 func Test_service_FakerError(t *testing.T) {
+	t.Parallel()
+
 	type args struct {
 		request string
 	}
@@ -158,6 +161,40 @@ func Test_service_FakerError(t *testing.T) {
 			"this should have errored",
 			true,
 		},
+		{
+			"call a property",
+			args{
+				"faker.Bla",
+			},
+			func(s interface{}) bool {
+				return true
+			},
+			"this should have errored",
+			true,
+		},
+		{
+			"started a function call but missing parameters",
+			args{
+				"faker.Bla(",
+			},
+			func(s interface{}) bool {
+				return true
+			},
+			"this should have errored",
+			true,
+		},
+
+		{
+			"missing parameters on long call",
+			args{
+				"faker.Bla().Fuu",
+			},
+			func(s interface{}) bool {
+				return true
+			},
+			"this should have errored",
+			true,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(