content: /*******************************************************************************
   * Copyright (c) 2009, 2019 Mountainminds GmbH & Co. KG and Contributors
   * 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:
   *    Evgeny Mandrikov - initial API and implementation
   *
   *******************************************************************************/
  package org.jacoco.core.internal.analysis.filter;
  
  import org.jacoco.core.internal.instr.InstrSupport;
  import org.junit.Test;
  import org.objectweb.asm.Label;
  import org.objectweb.asm.Opcodes;
  import org.objectweb.asm.tree.AbstractInsnNode;
  import org.objectweb.asm.tree.MethodNode;
  
  /**
   * Unit tests for {@link StringSwitchJavacFilter}.
   */
  public class StringSwitchJavacFilterTest extends FilterTestBase {
  
  	private final IFilter filter = new StringSwitchJavacFilter();
  
  	private final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0,
  			"name", "()V", null, null);
  
  	private AbstractInsnNode expectedFromInclusive;
  	private AbstractInsnNode expectedToInclusive;
  
  	private void createFirstSwitch() {
  		final Label h1 = new Label();
  		final Label h1_2 = new Label();
  		final Label h2 = new Label();
  		final Label secondSwitch = new Label();
  
  		m.visitInsn(Opcodes.ICONST_M1);
  		m.visitVarInsn(Opcodes.ISTORE, 2);
  
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "hashCode",
  				"()I", false);
  		m.visitLookupSwitchInsn(secondSwitch, new int[] { 97, 98 },
  				new Label[] { h1, h2 });
  		expectedFromInclusive = m.instructions.getLast();
  
  		m.visitLabel(h1);
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		m.visitLdcInsn("a");
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals",
  				"(Ljava/lang/Object;)Z", false);
  		// if not equal "a", then goto next comparison
  		m.visitJumpInsn(Opcodes.IFEQ, h1_2);
  		m.visitInsn(Opcodes.ICONST_0);
  		m.visitVarInsn(Opcodes.ISTORE, 2);
  
  		// goto secondSwitch
  		m.visitJumpInsn(Opcodes.GOTO, secondSwitch);
  
  		m.visitLabel(h1_2);
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		m.visitLdcInsn("\0a");
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals",
  				"(Ljava/lang/Object;)Z", false);
  		// if not equal "\0a", then goto second switch
  		m.visitJumpInsn(Opcodes.IFEQ, secondSwitch);
  		m.visitInsn(Opcodes.ICONST_1);
  		m.visitVarInsn(Opcodes.ISTORE, 2);
  
  		// goto secondSwitch
  		m.visitJumpInsn(Opcodes.GOTO, secondSwitch);
  
  		m.visitLabel(h2);
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		m.visitLdcInsn("b");
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals",
  				"(Ljava/lang/Object;)Z", false);
  		// if not equal "b", then goto second switch
  		m.visitJumpInsn(Opcodes.IFEQ, secondSwitch);
  		m.visitInsn(Opcodes.ICONST_2);
  		m.visitVarInsn(Opcodes.ISTORE, 2);
  
  		m.visitLabel(secondSwitch);
  		expectedToInclusive = m.instructions.getLast();
  		m.visitVarInsn(Opcodes.ILOAD, 2);
  	}
  
  	@Test
  	public void should_filter_code_generated_by_javac() {
  		createFirstSwitch();
  
  		final Label cases = new Label();
  		m.visitTableSwitchInsn(0, 2, cases);
  		m.visitLabel(cases);
  
  		filter.filter(m, context, output);
  
  		assertIgnored(new Range(expectedFromInclusive, expectedToInclusive));
  	}
  
  	@Test
  	public void should_filter_when_javac_generates_lookupswitch() {
  		createFirstSwitch();
  
  		final Label cases = new Label();
  		m.visitLookupSwitchInsn(cases, null, new Label[] {});
  		m.visitLabel(cases);
  
  		filter.filter(m, context, output);
  
  		assertIgnored(new Range(expectedFromInclusive, expectedToInclusive));
  	}
  
  	@Test
  	public void should_not_filter_code_generated_by_ECJ() {
  		final Label h1 = new Label();
  		final Label h2 = new Label();
  		final Label cases = new Label();
  
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "hashCode",
  				"()I", false);
  		m.visitTableSwitchInsn(0, 2, cases, h1, h2);
  
  		m.visitLabel(h1);
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		m.visitLdcInsn("a");
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals",
  				"(Ljava/lang/Object;)Z", false);
  		// if equal "a", then goto its case
  		m.visitJumpInsn(Opcodes.IFNE, cases);
  
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		m.visitLdcInsn("\0a");
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals",
  				"(Ljava/lang/Object;)Z", false);
  		// if equal "\0a", then goto its case
  		m.visitJumpInsn(Opcodes.IFNE, cases);
  
  		// goto default case
  		m.visitJumpInsn(Opcodes.GOTO, cases);
  
  		m.visitLabel(h2);
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		m.visitLdcInsn("b");
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals",
  				"(Ljava/lang/Object;)Z", false);
  		// if equal "b", then goto its case
  		m.visitJumpInsn(Opcodes.IFNE, cases);
  
  		// goto default case
  		m.visitJumpInsn(Opcodes.GOTO, cases);
  
  		m.visitLabel(cases);
  
  		filter.filter(m, context, output);
  
  		assertIgnored();
  	}
  
  }
  