fernflower/test/org/jetbrains/java/decompiler/SingleClassesTest.java

/*
 * Copyright 2000-2016 JetBrains s.r.o.
 *
 * 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 org.jetbrains.java.decompiler;

import org.jetbrains.java.decompiler.main.decompiler.ConsoleDecompiler;
import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.*;

import static org.jetbrains.java.decompiler.DecompilerTestFixture.assertFilesEqual;
import static org.junit.Assert.assertTrue;

public class SingleClassesTest {
  private DecompilerTestFixture fixture;

  @Before
  public void setUp() throws IOException {
    fixture = new DecompilerTestFixture();
    fixture.setUp(IFernflowerPreferences.BYTECODE_SOURCE_MAPPING, "1",
                  IFernflowerPreferences.DUMP_ORIGINAL_LINES, "1");
  }

  @After
  public void tearDown() {
    fixture.tearDown();
    fixture = null;
  }

  @Test public void testClassFields() { doTest("pkg/TestClassFields"); }
  @Test public void testInterfaceFields() { doTest("pkg/TestInterfaceFields"); }
  @Test public void testClassLambda() { doTest("pkg/TestClassLambda"); }
  @Test public void testClassLoop() { doTest("pkg/TestClassLoop"); }
  @Test public void testClassSwitch() { doTest("pkg/TestClassSwitch"); }
  @Test public void testClassTypes() { doTest("pkg/TestClassTypes"); }
  @Test public void testClassVar() { doTest("pkg/TestClassVar"); }
  @Test public void testClassNestedInitializer() { doTest("pkg/TestClassNestedInitializer"); }
  @Test public void testClassCast() { doTest("pkg/TestClassCast"); }
  @Test public void testDeprecations() { doTest("pkg/TestDeprecations"); }
  @Test public void testExtendsList() { doTest("pkg/TestExtendsList"); }
  @Test public void testMethodParameters() { doTest("pkg/TestMethodParameters"); }
  @Test public void testCodeConstructs() { doTest("pkg/TestCodeConstructs"); }
  @Test public void testConstants() { doTest("pkg/TestConstants"); }
  @Test public void testEnum() { doTest("pkg/TestEnum"); }
  @Test public void testDebugSymbols() { doTest("pkg/TestDebugSymbols"); }
  @Test public void testInvalidMethodSignature() { doTest("InvalidMethodSignature"); }
  @Test public void testInnerClassConstructor() { doTest("pkg/TestInnerClassConstructor"); }
  @Test public void testInnerClassConstructor11() { doTest("v11/TestInnerClassConstructor"); }
  @Test public void testTryCatchFinally() { doTest("pkg/TestTryCatchFinally"); }
  @Test public void testAmbiguousCall() { doTest("pkg/TestAmbiguousCall"); }
  @Test public void testAmbiguousCallWithDebugInfo() { doTest("pkg/TestAmbiguousCallWithDebugInfo"); }
  @Test public void testSimpleBytecodeMapping() { doTest("pkg/TestClassSimpleBytecodeMapping"); }
  @Test public void testSynchronizedMapping() { doTest("pkg/TestSynchronizedMapping"); }
  @Test public void testAbstractMethods() { doTest("pkg/TestAbstractMethods"); }
  @Test public void testLocalClass() { doTest("pkg/TestLocalClass"); }
  @Test public void testAnonymousClass() { doTest("pkg/TestAnonymousClass"); }
  @Test public void testThrowException() { doTest("pkg/TestThrowException"); }
  @Test public void testInnerLocal() { doTest("pkg/TestInnerLocal"); }
  @Test public void testInnerLocalPkg() { doTest("pkg/TestInnerLocalPkg"); }
  @Test public void testInnerSignature() { doTest("pkg/TestInnerSignature"); }
  @Test public void testParameterizedTypes() { doTest("pkg/TestParameterizedTypes"); }
  @Test public void testShadowing() { doTest("pkg/TestShadowing", "pkg/Shadow", "ext/Shadow"); }
  @Test public void testStringConcat() { doTest("pkg/TestStringConcat"); }
  @Test public void testJava9StringConcat() { doTest("java9/TestJava9StringConcat"); }
  @Test public void testMethodReferenceSameName() { doTest("pkg/TestMethodReferenceSameName"); }
  @Test public void testMethodReferenceLetterClass() { doTest("pkg/TestMethodReferenceLetterClass"); }
  @Test public void testMemberAnnotations() { doTest("pkg/TestMemberAnnotations"); }
  @Test public void testMoreAnnotations() { doTest("pkg/MoreAnnotations"); }
  @Test public void testTypeAnnotations() { doTest("pkg/TypeAnnotations"); }
  @Test public void testStaticNameClash() { doTest("pkg/TestStaticNameClash"); }
  @Test public void testExtendingSubclass() { doTest("pkg/TestExtendingSubclass"); }
  @Test public void testSyntheticAccess() { doTest("pkg/TestSyntheticAccess"); }
  @Test public void testIllegalVarName() { doTest("pkg/TestIllegalVarName"); }

  private void doTest(String testFile, String... companionFiles) {
    ConsoleDecompiler decompiler = fixture.getDecompiler();

    File classFile = new File(fixture.getTestDataDir(), "/classes/" + testFile + ".class");
    assertTrue(classFile.isFile());
    for (File file : collectClasses(classFile)) {
      decompiler.addSpace(file, true);
    }

    for (String companionFile : companionFiles) {
      File companionClassFile = new File(fixture.getTestDataDir(), "/classes/" + companionFile + ".class");
      assertTrue(companionClassFile.isFile());
      for (File file : collectClasses(companionClassFile)) {
        decompiler.addSpace(file, true);
      }
    }

    decompiler.decompileContext();

    String testName = classFile.getName().substring(0, classFile.getName().length() - 6);
    File decompiledFile = new File(fixture.getTargetDir(), testName + ".java");
    assertTrue(decompiledFile.isFile());
    File referenceFile = new File(fixture.getTestDataDir(), "results/" + testName + ".dec");
    assertTrue(referenceFile.isFile());
    assertFilesEqual(referenceFile, decompiledFile);
  }

  private static List<File> collectClasses(File classFile) {
    List<File> files = new ArrayList<>();
    files.add(classFile);

    File parent = classFile.getParentFile();
    if (parent != null) {
      final String pattern = classFile.getName().replace(".class", "") + "\\$.+\\.class";
      File[] inner = parent.listFiles((dir, name) -> name.matches(pattern));
      if (inner != null) Collections.addAll(files, inner);
    }

    return files;
  }
}