/*******************************************************************************
 * Copyright (c) 2002 - 2006 IBM Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package com.ibm.wala.core.tests.ir;

import java.io.IOException;

import org.junit.Assert;
import org.junit.Test;

import com.ibm.wala.analysis.typeInference.TypeInference;
import com.ibm.wala.classLoader.IClass;
import com.ibm.wala.classLoader.IMethod;
import com.ibm.wala.classLoader.ShrikeCTMethod;
import com.ibm.wala.core.tests.util.TestConstants;
import com.ibm.wala.core.tests.util.WalaTestCase;
import com.ibm.wala.ipa.callgraph.AnalysisCache;
import com.ibm.wala.ipa.callgraph.AnalysisOptions;
import com.ibm.wala.ipa.callgraph.AnalysisScope;
import com.ibm.wala.ipa.callgraph.impl.Everywhere;
import com.ibm.wala.ipa.cha.ClassHierarchy;
import com.ibm.wala.ipa.cha.ClassHierarchyException;
import com.ibm.wala.ssa.IR;
import com.ibm.wala.types.Descriptor;
import com.ibm.wala.types.Selector;
import com.ibm.wala.types.TypeReference;
import com.ibm.wala.util.config.AnalysisScopeReader;
import com.ibm.wala.util.io.FileProvider;
import com.ibm.wala.util.strings.Atom;

/**
 * tests for weird corner cases, such as when the input program doesn't verify
 * 
 * @author sfink
 */
public class CornerCasesTest extends WalaTestCase {

  private static final ClassLoader MY_CLASSLOADER = CornerCasesTest.class.getClassLoader();

  /**
   * test that getMethod() works even if a declared ancestor interface doesn't
   * exist
   * 
   * @throws ClassHierarchyException
   * @throws IOException 
   */
  @Test public void testBug38484() throws ClassHierarchyException, IOException {
    AnalysisScope scope = null;
    scope = AnalysisScopeReader.readJavaScope(TestConstants.WALA_TESTDATA, (new FileProvider()).getFile("J2SEClassHierarchyExclusions.txt"), MY_CLASSLOADER);
    ClassHierarchy cha = ClassHierarchy.make(scope);
    TypeReference t = TypeReference.findOrCreateClass(scope.getApplicationLoader(), "cornerCases", "YuckyInterface");
    IClass klass = cha.lookupClass(t);
    Assert.assertTrue(klass != null);
    IMethod m = klass.getMethod(new Selector(Atom.findOrCreateAsciiAtom("x"), Descriptor.findOrCreateUTF8("()V")));
    Assert.assertTrue(m == null);
  }

  /**
   * test that type inference works in the presence of a getfield where the
   * field's declared type cannot be loaded
   * 
   * @throws ClassHierarchyException
   * @throws IOException 
   */
  @Test public void testBug38540() throws ClassHierarchyException, IOException {
    AnalysisScope scope = null;
    scope = AnalysisScopeReader.readJavaScope(TestConstants.WALA_TESTDATA, (new FileProvider()).getFile("J2SEClassHierarchyExclusions.txt"), MY_CLASSLOADER);
    AnalysisOptions options = new AnalysisOptions();
    ClassHierarchy cha = ClassHierarchy.make(scope);
    TypeReference t = TypeReference.findOrCreateClass(scope.getApplicationLoader(), "cornerCases", "Main");
    IClass klass = cha.lookupClass(t);
    Assert.assertTrue(klass != null);
    ShrikeCTMethod m = (ShrikeCTMethod) klass.getMethod(new Selector(Atom.findOrCreateAsciiAtom("foo"), Descriptor
        .findOrCreateUTF8("()Ljava/lang/Object;")));
    Assert.assertTrue(m != null);
    IR ir = new AnalysisCache().getSSACache().findOrCreateIR(m, Everywhere.EVERYWHERE, options.getSSAOptions());
    TypeInference.make(ir, false);
  }

}