throw correct error if no args provided

Signed-off-by: Jan Braje <12571346+janluak@users.noreply.github.com>

pkg/cmd/bump.go

@@ -50,9 +50,11 @@ func newBumpCmd(actionConfig *action.Configuration, out io.Writer) *cobra.Comman
 			if len(args) == 2 {
 				o.bumpType = args[0]
 				o.chart = args[1]
-			} else {
+			} else if len(args) == 1 {
 				o.bumpType = ""
 				o.chart = args[0]
+			} else {
+				return fmt.Errorf("invalid arguments: %v", args)
 			}
 
 			return o.run(actionConfig, out)

pkg/cmd/bump_test.go

@@ -47,6 +47,10 @@ func TestBump(t *testing.T) {
 	}
 
 	tests := []cmdTestCase{{
+		name:      "no args",
+		cmd:       "bump",
+		wantError: true,
+	}, {
 		name:   "default",
 		cmd:    "bump " + tempChartDir,
 		golden: "output/bump-default.txt",