fixed the update action and test added

Author: Barbara Palumbo

commercetools-models/src/main/java/io/sphere/sdk/customers/commands/updateactions/SetAuthenticationMode.java

@@ -14,22 +14,22 @@
  * {@include.example io.sphere.sdk.customers.commands.CustomerUpdateCommandIntegrationTest#setAuthenticationMode()}
  */
 public final class SetAuthenticationMode extends UpdateActionImpl<Customer> {
-    private final AuthenticationMode authenticationMode;
+    private final AuthenticationMode authMode;
     @Nullable
     private final String password;
 
-    private SetAuthenticationMode(final AuthenticationMode authenticationMode, @Nullable final String password) {
+    private SetAuthenticationMode(final AuthenticationMode authMode, @Nullable final String password) {
         super("setAuthenticationMode");
-        this.authenticationMode = authenticationMode;
+        this.authMode = authMode;
         this.password = password;
     }
 
-    public static SetAuthenticationMode of(final AuthenticationMode authenticationMode, @Nullable final String password) {
-        return new SetAuthenticationMode(authenticationMode, password);
+    public static SetAuthenticationMode of(final AuthenticationMode authMode, @Nullable final String password) {
+        return new SetAuthenticationMode(authMode, password);
     }
 
-    public AuthenticationMode getAuthenticationMode() {
-        return authenticationMode;
+    public AuthenticationMode getAuthMode() {
+        return authMode;
     }
 
     @Nullable

commercetools-models/src/test/java/io/sphere/sdk/customers/commands/CustomerUpdateCommandIntegrationTest.java

@@ -364,6 +364,18 @@ public void setVatId() throws Exception {
         });
     }
 
+    @Test
+    public void setAuthenticationMode() throws Exception {
+        withUpdateableCustomer(client(), customer -> {
+            CustomerUpdateCommand update = CustomerUpdateCommand.of(customer, SetAuthenticationMode.of(AuthenticationMode.EXTERNAL_AUTH, null));
+            final Customer updatedCustomer = client().executeBlocking(update);
+
+            assertThat(updatedCustomer.getAuthenticationMode()).isEqualTo(AuthenticationMode.EXTERNAL_AUTH);
+
+            return updatedCustomer;
+        });
+    }
+
     @Test
     public void setDateOfBirth() throws Exception {
         withCustomer(client(), customer -> {