Way too much

buildSrc/src/test/java/JarCompactorTest.java

@@ -0,0 +1,39 @@
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.jar.JarOutputStream;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertNull;
+
+public class JarCompactorTest {
+    @Rule
+    public final TemporaryFolder temporaryFolder = new TemporaryFolder();
+
+    @Test
+    public void preservesFilesAndOmitsDirectoryEntries() throws Exception {
+        File artifact = temporaryFolder.newFile("artifact.jar");
+        byte[] content = "Iris artifact content".getBytes(StandardCharsets.UTF_8);
+        try (JarOutputStream output = new JarOutputStream(new FileOutputStream(artifact))) {
+            output.putNextEntry(new JarEntry("example/"));
+            output.closeEntry();
+            output.putNextEntry(new JarEntry("example/value.txt"));
+            output.write(content);
+            output.closeEntry();
+        }
+
+        JarCompactor.compact(artifact);
+
+        try (JarFile jar = new JarFile(artifact)) {
+            assertNull(jar.getJarEntry("example/"));
+            assertArrayEquals(content, jar.getInputStream(
+                    jar.getJarEntry("example/value.txt")).readAllBytes());
+        }
+    }
+}