eclipse-ditto#985: Add test for new credential types

Signed-off-by: Vadim Guenther <vadim.guenther@bosch.io>

model/connectivity/src/main/java/org/eclipse/ditto/model/connectivity/UserPasswordCredentials.java

@@ -117,6 +117,15 @@ public Builder toBuilder() {
         return new Builder(username, password);
     }
 
+    /**
+     * Create a new builder initialized with fields of this object.
+     *
+     * @return a new builder.
+     */
+    public static Builder newBuilder(final String username, final String password) {
+        return new Builder(username, password);
+    }
+
     /**
      * Builder of {@code UserPasswordCredentials}.
      */

model/connectivity/src/test/java/org/eclipse/ditto/model/connectivity/KeyPairCredentialsTest.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2021 Contributors to the Eclipse Foundation
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.eclipse.ditto.model.connectivity;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mutabilitydetector.unittesting.MutabilityAssert.assertInstancesOf;
+import static org.mutabilitydetector.unittesting.MutabilityMatchers.areImmutable;
+
+import org.junit.Test;
+
+import nl.jqno.equalsverifier.EqualsVerifier;
+
+/**
+ * Tests {@link org.eclipse.ditto.model.connectivity.KeyPairCredentials}.
+ */
+public final class KeyPairCredentialsTest {
+
+    @Test
+    public void testHashCodeAndEquals() {
+        EqualsVerifier.forClass(KeyPairCredentials.class).verify();
+    }
+
+    @Test
+    public void assertImmutability() {
+        assertInstancesOf(KeyPairCredentials.class, areImmutable());
+    }
+
+    @Test
+    public void testJsonSerialization() {
+        final Credentials original = KeyPairCredentials.newBuilder("bad public key", "bad private key")
+                .build();
+        final Credentials deserialized = Credentials.fromJson(original.toJson());
+        assertThat(deserialized).isEqualTo(original);
+    }
+}

model/connectivity/src/test/java/org/eclipse/ditto/model/connectivity/UsernamePasswordCredentialsTest.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2021 Contributors to the Eclipse Foundation
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.eclipse.ditto.model.connectivity;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mutabilitydetector.unittesting.MutabilityAssert.assertInstancesOf;
+import static org.mutabilitydetector.unittesting.MutabilityMatchers.areImmutable;
+
+import org.junit.Test;
+
+import nl.jqno.equalsverifier.EqualsVerifier;
+
+/**
+ * Tests {@link org.eclipse.ditto.model.connectivity.UserPasswordCredentials}.
+ */
+public final class UsernamePasswordCredentialsTest {
+
+    @Test
+    public void testHashCodeAndEquals() {
+        EqualsVerifier.forClass(UserPasswordCredentials.class).verify();
+    }
+
+    @Test
+    public void assertImmutability() {
+        assertInstancesOf(UserPasswordCredentials.class, areImmutable());
+    }
+
+    @Test
+    public void testJsonSerialization() {
+        final Credentials original = UserPasswordCredentials.newBuilder("username", "password")
+                .build();
+        final Credentials deserialized = Credentials.fromJson(original.toJson());
+        assertThat(deserialized).isEqualTo(original);
+    }
+}