[command.package] Add tests

Signed-off-by: Debdut Chakraborty <debdut.chakraborty@rocket.chat>

pkg/action/package.go

@@ -62,8 +62,8 @@ func (p *Package) Run(path string, vals map[string]interface{}) (string, error)
 		return "", err
 	}
 
-	if matched, _ := regexp.MatchString("^[[:lower:][:digit:]-]+$", ch.Name()); !matched {
-		return "", errors.New(fmt.Sprintf("Invalid chart name \"%s\". Chart names must be lower case letters and numbers with optionally dashes (-) for separator\n", ch.Name()))
+	if err := validateName(ch.Name()); err != nil {
+		return "", err
 	}
 
 	// If version is set, modify the version.
@@ -109,6 +109,14 @@ func (p *Package) Run(path string, vals map[string]interface{}) (string, error)
 	return name, err
 }
 
+// validateName verifies if the chart name has any illegal characters or not
+func validateName(name string) error {
+	if matched, _ := regexp.MatchString("^[[:lower:][:digit:]-]+$", name); !matched {
+		return errors.New(fmt.Sprintf("Invalid chart name \"%s\". Chart names must be lower case letters and numbers with optionally dashes (-) for separator\n", name))
+	}
+	return nil
+}
+
 // validateVersion Verify that version is a Version, and error out if it is not.
 func validateVersion(ver string) error {
 	if _, err := semver.NewVersion(ver); err != nil {

pkg/action/package_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package action
 
 import (
+	"fmt"
 	"io/ioutil"
 	"os"
 	"path"
@@ -123,3 +124,50 @@ func TestValidateVersion(t *testing.T) {
 		})
 	}
 }
+
+func TestValidateName(t *testing.T) {
+	type args struct {
+		name string
+	}
+	expectedError := "Invalid chart name \"%s\". Chart names must be lower case letters and numbers with optionally dashes (-) for separator\n"
+	tests := []struct {
+		name string
+		args
+	}{
+		{
+			"Uppercase letter in name",
+			args{
+				name: "TestChart",
+			},
+		},
+		{
+			"Whitespace ( ) in name",
+			args{
+				name: "test chart",
+			},
+		},
+		{
+			"Underscore (_) in name",
+			args{
+				name: "test_chart",
+			},
+		},
+		{
+			"dot (.) in name",
+			args{
+				name: "TestChart",
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			if err := validateName(test.args.name); err != nil {
+				er := fmt.Sprintf(expectedError, test.args.name)
+				if err.Error() != er {
+					t.Errorf("Expected {%v}, got {%v}", er, err)
+				}
+			}
+		})
+	}
+}