JUnit test the AlgorithmSuite class

pgpainless-core/src/main/java/org/pgpainless/algorithm/AlgorithmSuite.java

@@ -22,6 +22,10 @@ import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
 
+/**
+ * The {@link AlgorithmSuite} class is consulted when new OpenPGP keys are being generated to set
+ * preferred algorithms on the key.
+ */
 public class AlgorithmSuite {
 
     private static AlgorithmSuite defaultAlgorithmSuite = new AlgorithmSuite(
@@ -63,7 +67,7 @@ public class AlgorithmSuite {
 
     public int[] getSymmetricKeyAlgorithmIds() {
         int[] array = new int[symmetricKeyAlgorithms.size()];
-        List<SymmetricKeyAlgorithm> list = new ArrayList<>(symmetricKeyAlgorithms);
+        List<SymmetricKeyAlgorithm> list = new ArrayList<>(getSymmetricKeyAlgorithms());
         for (int i = 0; i < array.length; i++) {
             array[i] = list.get(i).getAlgorithmId();
         }
@@ -80,7 +84,7 @@ public class AlgorithmSuite {
 
     public int[] getHashAlgorithmIds() {
         int[] array = new int[hashAlgorithms.size()];
-        List<HashAlgorithm> list = new ArrayList<>(hashAlgorithms);
+        List<HashAlgorithm> list = new ArrayList<>(getHashAlgorithms());
         for (int i = 0; i < array.length; i++) {
             array[i] = list.get(i).getAlgorithmId();
         }
@@ -97,7 +101,7 @@ public class AlgorithmSuite {
 
     public int[] getCompressionAlgorithmIds() {
         int[] array = new int[compressionAlgorithms.size()];
-        List<CompressionAlgorithm> list = new ArrayList<>(compressionAlgorithms);
+        List<CompressionAlgorithm> list = new ArrayList<>(getCompressionAlgorithms());
         for (int i = 0; i < array.length; i++) {
             array[i] = list.get(i).getAlgorithmId();
         }

pgpainless-core/src/test/java/org/pgpainless/algorithm/AlgorithmSuiteTest.java

@@ -0,0 +1,73 @@
+/*
+ * 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.algorithm;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class AlgorithmSuiteTest {
+
+    private AlgorithmSuite suite;
+
+    @BeforeEach
+    public void resetEmptyAlgorithmSuite() {
+        suite = new AlgorithmSuite(
+                Collections.emptyList(),
+                Collections.emptyList(),
+                Collections.emptyList()
+        );
+    }
+
+    @Test
+    public void setSymmetricAlgorithmsTest() {
+        List<SymmetricKeyAlgorithm> algorithmList = Arrays.asList(
+                SymmetricKeyAlgorithm.AES_128, SymmetricKeyAlgorithm.AES_192, SymmetricKeyAlgorithm.AES_256
+        );
+
+        suite.setSymmetricKeyAlgorithms(algorithmList);
+
+        assertEquals(algorithmList, new ArrayList<>(suite.getSymmetricKeyAlgorithms()));
+    }
+
+    @Test
+    public void setHashAlgorithmsTest() {
+        List<HashAlgorithm> algorithmList = Arrays.asList(
+                HashAlgorithm.SHA256, HashAlgorithm.SHA384, HashAlgorithm.SHA512
+        );
+
+        suite.setHashAlgorithms(algorithmList);
+
+        assertEquals(algorithmList, new ArrayList<>(suite.getHashAlgorithms()));
+    }
+
+    @Test
+    public void setCompressionAlgorithmsTest() {
+        List<CompressionAlgorithm> algorithmList = Arrays.asList(
+                CompressionAlgorithm.ZLIB, CompressionAlgorithm.ZIP, CompressionAlgorithm.BZIP2
+        );
+
+        suite.setCompressionAlgorithms(algorithmList);
+
+        assertEquals(algorithmList, new ArrayList<>(suite.getCompressionAlgorithms()));
+    }
+}