Add initial tests for all operations

external-sop/src/test/java/sop/external/ExternalArmorDearmorRoundTripTest.java

@@ -0,0 +1,39 @@
+// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package sop.external;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledIf;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static sop.external.JUtils.arrayStartsWith;
+import static sop.external.JUtils.assertArrayStartsWith;
+
+@EnabledIf("sop.external.AbstractExternalSOPTest#isExternalSopInstalled")
+public class ExternalArmorDearmorRoundTripTest extends AbstractExternalSOPTest {
+
+    private static final String BEGIN_PGP_PRIVATE_KEY_BLOCK = "-----BEGIN PGP PRIVATE KEY BLOCK-----\n";
+    private static final byte[] BEGIN_PGP_PRIVATE_KEY_BLOCK_BYTES = BEGIN_PGP_PRIVATE_KEY_BLOCK.getBytes(StandardCharsets.UTF_8);
+
+    @Test
+    public void dearmorArmorAliceKey() throws IOException {
+        byte[] aliceKey = TestKeys.ALICE_KEY.getBytes(StandardCharsets.UTF_8);
+
+        byte[] dearmored = getSop().dearmor()
+                .data(aliceKey)
+                .getBytes();
+
+        assertFalse(arrayStartsWith(dearmored, BEGIN_PGP_PRIVATE_KEY_BLOCK_BYTES));
+
+        byte[] armored = getSop().armor()
+                .data(dearmored)
+                .getBytes();
+
+        assertArrayStartsWith(armored, BEGIN_PGP_PRIVATE_KEY_BLOCK_BYTES);
+    }
+}