Base PGPainlessCLI on new sop-java module

* Rename pgpainless-sop -> pgpainless-cli
* Introduce sop-java (implementation-independent SOP API)
* Introduce sop-java-picocli (CLI frontend for sop-java)
* Introduce pgpainless-sop (implementation of sop-java using PGPainless)
* Rework pgpainless-cli (plugs pgpainless-sop into sop-java-picocli)

sop-java-picocli/src/test/java/sop/cli/picocli/commands/SignCmdTest.java

@@ -0,0 +1,137 @@
+/*
+ * 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 sop.cli.picocli.commands;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import com.ginsberg.junit.exit.ExpectSystemExitWithStatus;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import sop.Ready;
+import sop.SOP;
+import sop.cli.picocli.SopCLI;
+import sop.exception.SOPGPException;
+import sop.operation.Sign;
+
+public class SignCmdTest {
+
+    Sign sign;
+    File keyFile;
+
+    @BeforeEach
+    public void mockComponents() throws IOException, SOPGPException.ExpectedText {
+        sign = mock(Sign.class);
+        when(sign.data(any())).thenReturn(new Ready() {
+            @Override
+            public void writeTo(OutputStream outputStream) {
+
+            }
+        });
+
+        SOP sop = mock(SOP.class);
+        when(sop.sign()).thenReturn(sign);
+
+        SopCLI.setSopInstance(sop);
+
+        keyFile = File.createTempFile("sign-", ".asc");
+    }
+
+    @Test
+    public void as_optionsAreCaseInsensitive() {
+        SopCLI.main(new String[] {"sign", "--as", "Binary", keyFile.getAbsolutePath()});
+        SopCLI.main(new String[] {"sign", "--as", "binary", keyFile.getAbsolutePath()});
+        SopCLI.main(new String[] {"sign", "--as", "BINARY", keyFile.getAbsolutePath()});
+    }
+
+    @Test
+    @ExpectSystemExitWithStatus(37)
+    public void as_invalidOptionCausesExit37() {
+        SopCLI.main(new String[] {"sign", "--as", "Invalid", keyFile.getAbsolutePath()});
+    }
+
+    @Test
+    @ExpectSystemExitWithStatus(37)
+    public void as_unsupportedOptionCausesExit37() throws SOPGPException.UnsupportedOption {
+        when(sign.mode(any())).thenThrow(new SOPGPException.UnsupportedOption());
+        SopCLI.main(new String[] {"sign", "--as", "binary", keyFile.getAbsolutePath()});
+    }
+
+    @Test
+    @ExpectSystemExitWithStatus(1)
+    public void key_nonExistentKeyFileCausesExit1() {
+        SopCLI.main(new String[] {"sign", "invalid.asc"});
+    }
+
+    @Test
+    @ExpectSystemExitWithStatus(1)
+    public void key_keyIsProtectedCausesExit1() throws SOPGPException.KeyIsProtected, IOException, SOPGPException.BadData {
+        when(sign.key(any())).thenThrow(new SOPGPException.KeyIsProtected());
+        SopCLI.main(new String[] {"sign", keyFile.getAbsolutePath()});
+    }
+
+    @Test
+    @ExpectSystemExitWithStatus(41)
+    public void key_badDataCausesExit41() throws SOPGPException.KeyIsProtected, IOException, SOPGPException.BadData {
+        when(sign.key(any())).thenThrow(new SOPGPException.BadData(new IOException()));
+        SopCLI.main(new String[] {"sign", keyFile.getAbsolutePath()});
+    }
+
+    @Test
+    @ExpectSystemExitWithStatus(19)
+    public void key_missingKeyFileCausesExit19() {
+        SopCLI.main(new String[] {"sign"});
+    }
+
+    @Test
+    public void noArmor_notCalledByDefault() {
+        SopCLI.main(new String[] {"sign", keyFile.getAbsolutePath()});
+        verify(sign, never()).noArmor();
+    }
+
+    @Test
+    public void noArmor_passedDown() {
+        SopCLI.main(new String[] {"sign", "--no-armor", keyFile.getAbsolutePath()});
+        verify(sign, times(1)).noArmor();
+    }
+
+    @Test
+    @ExpectSystemExitWithStatus(1)
+    public void data_ioExceptionCausesExit1() throws IOException, SOPGPException.ExpectedText {
+        when(sign.data(any())).thenReturn(new Ready() {
+            @Override
+            public void writeTo(OutputStream outputStream) throws IOException {
+                throw new IOException();
+            }
+        });
+        SopCLI.main(new String[] {"sign", keyFile.getAbsolutePath()});
+    }
+
+    @Test
+    @ExpectSystemExitWithStatus(53)
+    public void data_expectedTextExceptionCausesExit53() throws IOException, SOPGPException.ExpectedText {
+        when(sign.data(any())).thenThrow(new SOPGPException.ExpectedText());
+        SopCLI.main(new String[] {"sign", keyFile.getAbsolutePath()});
+    }
+}