update clientOptions and add relevant tests

Author: tanya732

src/main/java/com/auth0/client/mgmt/core/ClientOptions.java

@@ -27,6 +27,8 @@ public final class ClientOptions {
 
     private final int maxRetries;
 
+    private final Telemetry telemetry;
+
     private ClientOptions(
             Environment environment,
             Map<String, String> headers,
@@ -49,6 +51,7 @@ private ClientOptions(
         this.httpClient = httpClient;
         this.timeout = timeout;
         this.maxRetries = maxRetries;
+        this.telemetry = telemetry;
     }
 
     public Environment environment() {
@@ -94,6 +97,32 @@ public int maxRetries() {
         return this.maxRetries;
     }
 
+    /**
+     * The telemetry explicitly configured on this instance, or {@code null} if it was left to
+     * default to {@code auth0-java}. Package-private so {@link Builder#from(ClientOptions)} can
+     * carry it over; not part of the public API.
+     */
+    Telemetry telemetry() {
+        return this.telemetry;
+    }
+
+    /**
+     * The static headers configured on this instance, including the resolved {@code Auth0-Client}
+     * header. Package-private so {@link Builder#from(ClientOptions)} can carry them over; not part
+     * of the public API.
+     */
+    Map<String, String> headers() {
+        return this.headers;
+    }
+
+    /**
+     * The dynamic header suppliers configured on this instance. Package-private so
+     * {@link Builder#from(ClientOptions)} can carry them over; not part of the public API.
+     */
+    Map<String, Supplier<String>> headerSuppliers() {
+        return this.headerSuppliers;
+    }
+
     public static Builder builder() {
         return new Builder();
     }
@@ -230,13 +259,22 @@ public ClientOptions build() {
         }
 
         /**
-         * Create a new Builder initialized with values from an existing ClientOptions
+         * Create a new Builder initialized with values from an existing ClientOptions.
+         *
+         * <p>Interceptors and logging are not copied explicitly: they are already baked into the
+         * {@link OkHttpClient} carried over here, and {@link #build()} preserves them via
+         * {@code newBuilder()}. Copying them would attach them a second time. The same applies to
+         * the retry interceptor, hence {@code maxRetries} is carried over for reporting only.
          */
         public static Builder from(ClientOptions clientOptions) {
             Builder builder = new Builder();
             builder.environment = clientOptions.environment();
             builder.timeout = Optional.of(clientOptions.timeout(null));
             builder.httpClient = clientOptions.httpClient();
+            builder.maxRetries = clientOptions.maxRetries();
+            builder.telemetry = clientOptions.telemetry();
+            builder.headers.putAll(clientOptions.headers());
+            builder.headerSuppliers.putAll(clientOptions.headerSuppliers());
             return builder;
         }
     }

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

@@ -62,6 +62,28 @@ public void shouldNestAuth0JavaInTelemetryEnv() throws Exception {
         assertThat(telemetry.get("env").get("auth0-java").asText(), is("auth0-java-9.9.9"));
     }
 
+    @Test
+    public void shouldPreserveTelemetryAndHeadersWhenCopyingOptions() throws Exception {
+        ClientOptions original = ClientOptions.builder()
+                .environment(com.auth0.client.mgmt.core.Environment.DEFAULT)
+                .telemetry(new Telemetry("my-wrapper-sdk", "1.2.3"))
+                .addHeader("Authorization", "Bearer test-token")
+                .addHeader("X-Dynamic", () -> "dynamic-value")
+                .maxRetries(5)
+                .build();
+
+        ClientOptions copy = ClientOptions.Builder.from(original).build();
+
+        Map<String, String> headers = copy.headers(null);
+        JsonNode telemetry =
+                ObjectMapperProvider.getMapper().readTree(Base64.getUrlDecoder().decode(headers.get("Auth0-Client")));
+        assertThat(telemetry.get("name").asText(), is("my-wrapper-sdk"));
+        assertThat(telemetry.get("version").asText(), is("1.2.3"));
+        assertThat(headers.get("Authorization"), is("Bearer test-token"));
+        assertThat(headers.get("X-Dynamic"), is("dynamic-value"));
+        assertThat(copy.maxRetries(), is(5));
+    }
+
     @Test
     public void shouldReturnBuilderFromWithTelemetry() {
         ManagementApiBuilder builder = ManagementApi.builder();