Fix: Corrected regexp for eventhub name

azurerm/helpers/azure/eventhub.go

@@ -15,28 +15,28 @@ import (
 func ValidateEventHubNamespaceName() schema.SchemaValidateFunc {
 	return validation.StringMatch(
 		regexp.MustCompile("^[a-zA-Z][-a-zA-Z0-9]{4,48}[a-zA-Z0-9]$"),
-		"The namespace name can contain only letters, numbers, underscores and hyphens. The namespace must start with a letter, and it must end with a letter or number and be between 6 and 50 characters long.",
+		"The namespace name can contain only letters, numbers and hyphens. The namespace must start with a letter, and it must end with a letter or number and be between 6 and 50 characters long.",
 	)
 }
 
 func ValidateEventHubName() schema.SchemaValidateFunc {
 	return validation.StringMatch(
-		regexp.MustCompile("^[a-zA-Z][-_a-zA-Z0-9]{4,48}[a-zA-Z0-9]$"),
-		"The namespace name can contain only letters, numbers, and hyphens. The namespace must start with a letter, and it must end with a letter or number and be between 6 and 50 characters long.",
+		regexp.MustCompile("^[a-zA-Z0-9]([-._a-zA-Z0-9]{0,48}[a-zA-Z0-9])?$"),
+		"The event hub name can contain only letters, numbers, periods (.), hyphens (-),and underscores (_), up to 50 characters, and it must begin and end with a letter or number.",
 	)
 }
 
 func ValidateEventHubConsumerName() schema.SchemaValidateFunc {
 	return validation.StringMatch(
-		regexp.MustCompile("^[a-zA-Z][-a-zA-Z0-9]{4,48}[a-zA-Z0-9]$"),
-		"The namespace name can contain only letters, numbers, and hyphens. The namespace must start with a letter, and it must end with a letter or number and be between 6 and 50 characters long.",
+		regexp.MustCompile("^[a-zA-Z0-9]([-._a-zA-Z0-9]{0,48}[a-zA-Z0-9])?$"),
+		"The consumer group name can contain only letters, numbers, periods (.), hyphens (-),and underscores (_), up to 50 characters, and it must begin and end with a letter or number.",
 	)
 }
 
 func ValidateEventHubAuthorizationRuleName() schema.SchemaValidateFunc {
 	return validation.StringMatch(
-		regexp.MustCompile("^[a-zA-Z0-9][-._a-zA-Z0-9]{0,48}([a-zA-Z0-9])?$"),
-		"The name can contain only letters, numbers, periods, hyphens and underscores. The name must start and end with a letter or number and be less the 50 characters long.",
+		regexp.MustCompile("^[a-zA-Z0-9]([-._a-zA-Z0-9]{0,48}[a-zA-Z0-9])?$"),
+		"The authorization rule name can contain only letters, numbers, periods, hyphens and underscores. The name must start and end with a letter or number and be up to 50 characters long.",
 	)
 }
 

azurerm/helpers/azure/eventhub_test.go

@@ -0,0 +1,65 @@
+package azure
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestValidateEventHubName(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		valid bool
+	}{
+		{
+			name:  "Valid short name",
+			input: "abc",
+			valid: true,
+		},
+		{
+			name:  "Valid short name",
+			input: "a",
+			valid: true,
+		},
+		{
+			name:  "Valid name with dot",
+			input: "a.b",
+			valid: true,
+		},
+		{
+			name:  "Just a digit",
+			input: "1",
+			valid: true,
+		},
+		{
+			name:  "Invalid long name",
+			input: strings.Repeat("a", 51),
+			valid: false,
+		},
+		{
+			name:  "Invalid short name",
+			input: ".",
+			valid: false,
+		},
+		{
+			name:  "Invalid name with period at end",
+			input: "a.",
+			valid: false,
+		},
+		{
+			name:  "empty name",
+			input: "",
+			valid: false,
+		},
+	}
+	var validationFunction = ValidateEventHubName()
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := validationFunction(tt.input, "")
+			valid := err == nil
+			if valid != tt.valid {
+				t.Errorf("Expected valid status %t but got %t for input %s", tt.valid, valid, tt.input)
+			}
+		})
+	}
+}