Allow numerical characters in example names/titles

modulegen/main.go

@@ -96,12 +96,12 @@ func (e *Example) Type() string {
 }
 
 func (e *Example) Validate() error {
-	if !regexp.MustCompile(`^[A-Za-z]+$`).MatchString(e.Name) {
-		return fmt.Errorf("invalid name: %s. Only alphabetical characters are allowed", e.Name)
+	if !regexp.MustCompile(`^[A-Za-z][A-Za-z0-9]*$`).MatchString(e.Name) {
+		return fmt.Errorf("invalid name: %s. Only alphanumerical characters are allowed", e.Name)
 	}
 
-	if !regexp.MustCompile(`^[A-Za-z]+$`).MatchString(e.TitleName) {
-		return fmt.Errorf("invalid title: %s. Only alphabetical characters are allowed", e.TitleName)
+	if !regexp.MustCompile(`^[A-Za-z][A-Za-z0-9]*$`).MatchString(e.TitleName) {
+		return fmt.Errorf("invalid title: %s. Only alphanumerical characters are allowed", e.TitleName)
 	}
 
 	return nil

modulegen/main_test.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"errors"
 	"os"
 	"path/filepath"
 	"strings"
@@ -77,6 +78,60 @@ func TestExample(t *testing.T) {
 	}
 }
 
+func TestExample_Validate(outer *testing.T) {
+	outer.Parallel()
+
+	tests := []struct {
+		name        string
+		example     Example
+		expectedErr error
+	}{
+		{
+			name: "only alphabetical characters in name/title",
+			example: Example{
+				Name:      "AmazingDB",
+				TitleName: "AmazingDB",
+			},
+		},
+		{
+			name: "alphanumerical characters in name",
+			example: Example{
+				Name:      "AmazingDB4tw",
+				TitleName: "AmazingDB",
+			},
+		},
+		{
+			name: "alphanumerical characters in title",
+			example: Example{
+				Name:      "AmazingDB",
+				TitleName: "AmazingDB4tw",
+			},
+		},
+		{
+			name: "non-alphanumerical characters in name",
+			example: Example{
+				Name:      "Amazing DB 4 The Win",
+				TitleName: "AmazingDB",
+			},
+			expectedErr: errors.New("invalid name: Amazing DB 4 The Win. Only alphanumerical characters are allowed"),
+		},
+		{
+			name: "non-alphanumerical characters in title",
+			example: Example{
+				Name:      "AmazingDB",
+				TitleName: "Amazing DB 4 The Win",
+			},
+			expectedErr: errors.New("invalid title: Amazing DB 4 The Win. Only alphanumerical characters are allowed"),
+		},
+	}
+
+	for _, test := range tests {
+		outer.Run(test.name, func(t *testing.T) {
+			assert.Equal(t, test.expectedErr, test.example.Validate())
+		})
+	}
+}
+
 func TestGenerateWrongExampleName(t *testing.T) {
 	rootTmp := t.TempDir()
 	examplesTmp := filepath.Join(rootTmp, "examples")
@@ -190,8 +245,8 @@ func TestGenerate(t *testing.T) {
 	assert.Nil(t, err)
 
 	example := Example{
-		Name:      "foodb",
-		TitleName: "FooDB",
+		Name:      "foodb4tw",
+		TitleName: "FooDB4TheWin",
 		IsModule:  false,
 		Image:     "docker.io/example/foodb:latest",
 		TCVersion: "v0.0.0-test",