Added tests for KeyStoreReader class

src/test/java/us/dot/its/jpo/sec/helpers/KeyStoreReaderTest.java

@@ -0,0 +1,84 @@
+package us.dot.its.jpo.sec.helpers;
+
+import static org.junit.Assert.assertThrows;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.security.KeyStore;
+import java.security.KeyStoreException;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.CertificateException;
+
+import org.junit.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import mockit.Tested;
+
+@ExtendWith(MockitoExtension.class)
+public class KeyStoreReaderTest {
+
+    @Tested
+    KeyStoreReader keyStoreReader = new KeyStoreReader();
+
+    private void createKeyStoreForTesting() throws KeyStoreException, NoSuchAlgorithmException, CertificateException, IOException {
+        KeyStore testKeyStore = KeyStore.getInstance(KeyStore.getDefaultType());
+        char[] password = "password".toCharArray();
+        testKeyStore.load(null, password);
+        testKeyStore.store(new FileOutputStream("src/test/resources/test.jks"), password);
+    }
+
+    private void setUp() throws KeyStoreException, NoSuchAlgorithmException, CertificateException, IOException {
+        // create resources directory if it doesn't exist
+        File resourcesDir = new File("src/test/resources");
+        if (!resourcesDir.exists()) {
+            resourcesDir.mkdir();
+        }
+        File file = new File("src/test/resources/test.jks");
+        if (file.exists()) {
+            file.delete();
+        }
+        createKeyStoreForTesting();
+    }
+
+    @Test
+    public void testReadStore_Success() throws Exception {
+        // prepare
+        setUp();
+        String keyStorePath = "src/test/resources/test.jks";
+        String keyStorePassword = "password";
+
+        // execute
+        KeyStore keyStore = keyStoreReader.readStore(keyStorePath, keyStorePassword);
+
+        // verify
+        assert(keyStore != null);
+    }
+
+    @Test
+    public void testReadStore_Failure_WrongPassword() throws Exception {
+        // prepare
+        setUp();
+        String keyStorePath = "src/test/resources/test.jks";
+        String keyStorePassword = "wrongpassword";
+
+        // execute
+        assertThrows(Exception.class, () -> {
+            KeyStore keyStore = keyStoreReader.readStore(keyStorePath, keyStorePassword);
+        });
+    }
+
+    @Test
+    public void testReadStore_Failure_WrongPath() throws Exception {
+        // prepare
+        setUp();
+        String keyStorePath = "src/test/resources/wrong.jks";
+        String keyStorePassword = "password";
+
+        // execute
+        assertThrows(Exception.class, () -> {
+            KeyStore keyStore = keyStoreReader.readStore(keyStorePath, keyStorePassword);
+        });
+    }
+}