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 java.util.HashSet;
  import java.util.Set;
  
  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 KotlinWhenFilter}.
   */
  public class KotlinWhenFilterTest extends FilterTestBase {
  
  	private final KotlinWhenFilter filter = new KotlinWhenFilter();
  
  	private final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0,
  			"name", "()V", null, null);
  
  	@Test
  	public void should_filter_implicit_else() {
  		final Label label = new Label();
  
  		final Range range1 = new Range();
  
  		m.visitInsn(Opcodes.NOP);
  
  		m.visitJumpInsn(Opcodes.IFEQ, label);
  		range1.fromInclusive = m.instructions.getLast();
  		range1.toInclusive = m.instructions.getLast();
  
  		m.visitInsn(Opcodes.NOP);
  
  		final Range range2 = new Range();
  		m.visitLabel(label);
  		range2.fromInclusive = m.instructions.getLast();
  		m.visitTypeInsn(Opcodes.NEW, "kotlin/NoWhenBranchMatchedException");
  		m.visitInsn(Opcodes.DUP);
  		m.visitMethodInsn(Opcodes.INVOKESPECIAL,
  				"kotlin/NoWhenBranchMatchedException", "<init>", "()V", false);
  		m.visitInsn(Opcodes.ATHROW);
  		range2.toInclusive = m.instructions.getLast();
  
  		filter.filter(m, context, output);
  
  		assertIgnored(range1, range2);
  		assertNoReplacedBranches();
  	}
  
  	@Test
  	public void should_not_filter_explicit_else() {
  		final Label label = new Label();
  
  		m.visitInsn(Opcodes.NOP);
  
  		m.visitJumpInsn(Opcodes.IFEQ, label);
  
  		m.visitInsn(Opcodes.NOP);
  
  		m.visitLabel(label);
  		m.visitTypeInsn(Opcodes.NEW, "kotlin/NoWhenBranchMatchedException");
  		m.visitInsn(Opcodes.DUP);
  		m.visitMethodInsn(Opcodes.INVOKESPECIAL,
  				"kotlin/NoWhenBranchMatchedException", "<init>", "()V", false);
  		m.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Throwable");
  		m.visitInsn(Opcodes.ATHROW);
  
  		filter.filter(m, context, output);
  
  		assertIgnored();
  		assertNoReplacedBranches();
  	}
  
  	@Test
  	public void should_filter_implicit_default() {
  		final Label case1 = new Label();
  		final Label caseDefault = new Label();
  		final Label after = new Label();
  
  		m.visitInsn(Opcodes.NOP);
  
  		m.visitTableSwitchInsn(0, 0, caseDefault, case1);
  		final AbstractInsnNode switchNode = m.instructions.getLast();
  		final Set<AbstractInsnNode> newTargets = new HashSet<AbstractInsnNode>();
  
  		m.visitLabel(case1);
  		m.visitInsn(Opcodes.ICONST_1);
  		newTargets.add(m.instructions.getLast());
  		m.visitJumpInsn(Opcodes.GOTO, after);
  
  		final Range range1 = new Range();
  		m.visitLabel(caseDefault);
  		range1.fromInclusive = m.instructions.getLast();
  		m.visitTypeInsn(Opcodes.NEW, "kotlin/NoWhenBranchMatchedException");
  		m.visitInsn(Opcodes.DUP);
  		m.visitMethodInsn(Opcodes.INVOKESPECIAL,
  				"kotlin/NoWhenBranchMatchedException", "<init>", "()V", false);
  		m.visitInsn(Opcodes.ATHROW);
  		range1.toInclusive = m.instructions.getLast();
  
  		m.visitLabel(after);
  
  		filter.filter(m, context, output);
  
  		assertIgnored(range1);
  		assertReplacedBranches(switchNode, newTargets);
  	}
  
  }
  