Add test for EncryptionOptions

pgpainless-core/src/test/java/org/pgpainless/encryption_signing/EncryptionOptionsTest.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.pgpainless.encryption_signing;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
+
+public class EncryptionOptionsTest {
+
+    @Test
+    public void testOverrideEncryptionAlgorithmFailsForNULL() {
+        EncryptionOptions options = new EncryptionOptions();
+        assertNull(options.getEncryptionAlgorithmOverride());
+
+        assertThrows(IllegalArgumentException.class, () -> options.overrideEncryptionAlgorithm(SymmetricKeyAlgorithm.NULL));
+
+        assertNull(options.getEncryptionAlgorithmOverride());
+    }
+
+    @Test
+    public void testOverrideEncryptionOptions() {
+        EncryptionOptions options = new EncryptionOptions();
+        assertNull(options.getEncryptionAlgorithmOverride());
+        options.overrideEncryptionAlgorithm(SymmetricKeyAlgorithm.AES_128);
+
+        assertEquals(SymmetricKeyAlgorithm.AES_128, options.getEncryptionAlgorithmOverride());
+    }
+}