fix: accept a scheme and trailing slash in ManagementApiBuilder.domain()

src/main/java/com/auth0/client/mgmt/ManagementApiBuilder.java

@@ -67,7 +67,8 @@ public ManagementApiBuilder url(String url) {
      *     .build();
      * }</pre>
      *
-     * @param domain The Auth0 domain (e.g., "your-tenant.auth0.com")
+     * @param domain The Auth0 domain (e.g., "your-tenant.auth0.com"). A leading {@code https://} and a trailing
+     *               slash are accepted.
      * @return This builder for method chaining
      */
     public ManagementApiBuilder domain(String domain) {
@@ -241,7 +242,7 @@ protected ClientOptions buildClientOptions() {
      */
     protected void setEnvironment(ClientOptions.Builder builder) {
         if (this.domain != null) {
-            String url = "https://" + this.domain + "/api/v2";
+            String url = getBaseUrl() + "/api/v2";
             builder.environment(Environment.custom(url));
         } else {
             builder.environment(this.environment);
@@ -256,7 +257,11 @@ protected void setEnvironment(ClientOptions.Builder builder) {
      */
     protected String getBaseUrl() {
         if (this.domain != null) {
-            return "https://" + this.domain;
+            String url = this.domain.replaceAll("/+$", "");
+            if (!url.startsWith("https://") && !url.startsWith("http://")) {
+                url = "https://" + url;
+            }
+            return url;
         }
         // Extract base URL from environment URL by removing /api/v2 suffix
         String envUrl = this.environment.getUrl();

src/test/java/com/auth0/client/mgmt/ManagementApiBuilderTest.java

@@ -1,6 +1,9 @@
 package com.auth0.client.mgmt;
 
-import org.junit.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
 
 /**
  * Tests for ManagementApiBuilder domain-based initialization.
@@ -43,22 +46,24 @@ public void testAudienceMethodExists() {
     /**
      * Test that build() fails when no authentication is provided.
      */
-    @Test(expected = RuntimeException.class)
+    @Test
     public void testBuildFailsWithoutAuth() {
-        ManagementApi.builder().domain("my-tenant.auth0.com").build();
+        assertThrows(
+                RuntimeException.class,
+                () -> ManagementApi.builder().domain("my-tenant.auth0.com").build());
     }
 
     /**
      * Test that build() fails when only clientId is provided without clientSecret.
      */
-    @Test(expected = RuntimeException.class)
+    @Test
     public void testBuildFailsWithPartialCredentials() {
         // This tests an edge case where someone might call clientCredentials incorrectly
         ManagementApiBuilder builder = ManagementApi.builder();
         builder.domain("my-tenant.auth0.com");
         // Manually set only clientId to simulate partial configuration
         // This should fail during build
-        builder.build();
+        assertThrows(RuntimeException.class, builder::build);
     }
 
     /**
@@ -138,4 +143,30 @@ public void testFluentChaining() {
                 .build();
         assert client != null : "Fluent chaining should work";
     }
+
+    /**
+     * Test that domain() builds the expected URLs from a bare domain.
+     */
+    @Test
+    public void testDomainUrls() {
+        ManagementApiBuilder builder =
+                ManagementApi.builder().domain("my-tenant.auth0.com").token("test-token");
+        assertEquals("https://my-tenant.auth0.com", builder.getBaseUrl());
+        assertEquals(
+                "https://my-tenant.auth0.com/api/v2",
+                builder.buildClientOptions().environment().getUrl());
+    }
+
+    /**
+     * Test that domain() accepts a domain that includes the scheme and a trailing slash.
+     */
+    @Test
+    public void testDomainWithSchemeAndTrailingSlash() {
+        ManagementApiBuilder builder =
+                ManagementApi.builder().domain("https://my-tenant.auth0.com/").token("test-token");
+        assertEquals("https://my-tenant.auth0.com", builder.getBaseUrl());
+        assertEquals(
+                "https://my-tenant.auth0.com/api/v2",
+                builder.buildClientOptions().environment().getUrl());
+    }
 }