Add more tests for sop code

pgpainless-cli/src/test/java/org/pgpainless/cli/commands/DearmorCmdTest.java

@@ -6,6 +6,7 @@ package org.pgpainless.cli.commands;
 
 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -87,4 +88,16 @@ public class DearmorCmdTest extends CLITest {
 
         assertEquals("Hello, World\n", out.toString());
     }
+
+    @Test
+    public void dearmorGarbageEmitsEmpty() {
+        String noArmoredData = "This is not armored.";
+        System.setIn(new ByteArrayInputStream(noArmoredData.getBytes(StandardCharsets.UTF_8)));
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        System.setOut(new PrintStream(out));
+        PGPainlessCLI.execute("dearmor");
+
+        assertTrue(out.toString().isEmpty());
+    }
+
 }

pgpainless-cli/src/test/java/org/pgpainless/cli/commands/RoundTripInlineSignVerifyCmdTest.java

@@ -0,0 +1,107 @@
+// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package org.pgpainless.cli.commands;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.nio.charset.StandardCharsets;
+
+import com.ginsberg.junit.exit.FailOnSystemExit;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.pgpainless.cli.PGPainlessCLI;
+import org.pgpainless.cli.TestUtils;
+
+public class RoundTripInlineSignVerifyCmdTest {
+    private static File tempDir;
+    private static PrintStream originalSout;
+
+    @BeforeAll
+    public static void prepare() throws IOException {
+        tempDir = TestUtils.createTempDirectory();
+    }
+
+    @Test
+    @FailOnSystemExit
+    public void encryptAndDecryptAMessage() throws IOException {
+        originalSout = System.out;
+        File sigmundKeyFile = new File(tempDir, "sigmund.key");
+        assertTrue(sigmundKeyFile.createNewFile());
+
+        File sigmundCertFile = new File(tempDir, "sigmund.cert");
+        assertTrue(sigmundCertFile.createNewFile());
+
+        File msgFile = new File(tempDir, "signed.asc");
+        assertTrue(msgFile.createNewFile());
+
+        File passwordFile = new File(tempDir, "password");
+        assertTrue(passwordFile.createNewFile());
+
+        // write password file
+        FileOutputStream passwordOut = new FileOutputStream(passwordFile);
+        passwordOut.write("sw0rdf1sh".getBytes(StandardCharsets.UTF_8));
+        passwordOut.close();
+
+        // generate key
+        OutputStream sigmundKeyOut = new FileOutputStream(sigmundKeyFile);
+        System.setOut(new PrintStream(sigmundKeyOut));
+        PGPainlessCLI.execute("generate-key",
+                "--with-key-password=" + passwordFile.getAbsolutePath(),
+                "Sigmund Freud <sigmund@pgpainless.org>");
+        sigmundKeyOut.close();
+
+        // extract cert
+        FileInputStream sigmundKeyIn = new FileInputStream(sigmundKeyFile);
+        System.setIn(sigmundKeyIn);
+        OutputStream sigmundCertOut = new FileOutputStream(sigmundCertFile);
+        System.setOut(new PrintStream(sigmundCertOut));
+        PGPainlessCLI.execute("extract-cert");
+        sigmundKeyIn.close();
+        sigmundCertOut.close();
+
+        // sign message
+        String msg = "Hello World!\n";
+        ByteArrayInputStream msgIn = new ByteArrayInputStream(msg.getBytes(StandardCharsets.UTF_8));
+        System.setIn(msgIn);
+        OutputStream msgAscOut = new FileOutputStream(msgFile);
+        System.setOut(new PrintStream(msgAscOut));
+        PGPainlessCLI.execute("inline-sign",
+                "--with-key-password=" + passwordFile.getAbsolutePath(),
+                sigmundKeyFile.getAbsolutePath());
+        msgAscOut.close();
+
+        File verifyFile = new File(tempDir, "verify.txt");
+
+        FileInputStream msgAscIn = new FileInputStream(msgFile);
+        System.setIn(msgAscIn);
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        PrintStream pOut = new PrintStream(out);
+        System.setOut(pOut);
+        PGPainlessCLI.execute("inline-verify",
+                "--verifications-out", verifyFile.getAbsolutePath(),
+                sigmundCertFile.getAbsolutePath());
+        msgAscIn.close();
+
+        assertEquals(msg, out.toString());
+    }
+
+    @AfterAll
+    public static void after() {
+        System.setOut(originalSout);
+        // CHECKSTYLE:OFF
+        System.out.println(tempDir.getAbsolutePath());
+        // CHECKSTYLE:ON
+    }
+}