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 static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertSame;
  
  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.MethodNode;
  import org.objectweb.asm.tree.VarInsnNode;
  
  /**
   * Unit tests for {@link AbstractMatcher}.
   */
  public class AbstractMatcherTest {
  
  	private final AbstractMatcher matcher = new AbstractMatcher() {
  	};
  
  	private final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0,
  			"method_name", "()V", null, null);
  
  	@Test
  	public void skipNonOpcodes() {
  		m.visitFrame(Opcodes.F_FULL, 0, null, 0, null);
  		final Label label = new Label();
  		m.visitLabel(label);
  		m.visitLineNumber(42, label);
  		m.visitInsn(Opcodes.NOP);
  
  		// should skip all non opcodes
  		matcher.cursor = m.instructions.getFirst();
  		matcher.skipNonOpcodes();
  		assertSame(m.instructions.getLast(), matcher.cursor);
  
  		// should not change cursor when it points on instruction with opcode
  		matcher.skipNonOpcodes();
  		assertSame(m.instructions.getLast(), matcher.cursor);
  
  		// should not do anything when cursor is null
  		matcher.cursor = null;
  		matcher.skipNonOpcodes();
  	}
  
  	@Test
  	public void nextIs() {
  		m.visitInsn(Opcodes.NOP);
  		m.visitInsn(Opcodes.NOP);
  
  		// should set cursor to null when opcode mismatch
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIs(Opcodes.ATHROW);
  		assertNull(matcher.cursor);
  
  		// should set cursor to next instruction when match
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIs(Opcodes.NOP);
  		assertSame(m.instructions.getLast(), matcher.cursor);
  
  		// should not do anything when cursor is null
  		matcher.cursor = null;
  		matcher.nextIs(Opcodes.NOP);
  	}
  
  	@Test
  	public void nextIsSwitch() {
  		// should set cursor to null when opcode mismatch
  		m.visitInsn(Opcodes.NOP);
  		m.visitInsn(Opcodes.NOP);
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsSwitch();
  		assertNull(matcher.cursor);
  
  		// should set cursor to next instruction when match
  		m.instructions.clear();
  		m.visitInsn(Opcodes.NOP);
  		m.visitTableSwitchInsn(0, 0, new Label());
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsSwitch();
  		assertSame(m.instructions.getLast(), matcher.cursor);
  
  		// should set cursor to next instruction when match
  		m.instructions.clear();
  		m.visitInsn(Opcodes.NOP);
  		m.visitLookupSwitchInsn(new Label(), null, new Label[0]);
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsSwitch();
  		assertSame(m.instructions.getLast(), matcher.cursor);
  
  		// should not do anything when cursor is null
  		matcher.cursor = null;
  		matcher.nextIsSwitch();
  	}
  
  	@Test
  	public void nextIsVar() {
  		m.visitInsn(Opcodes.NOP);
  		m.visitVarInsn(Opcodes.ILOAD, 42);
  
  		// should set cursor to null when opcode mismatch
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsVar(Opcodes.ALOAD, "name");
  		assertNull(matcher.cursor);
  
  		// should set cursor to next instruction when match
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsVar(Opcodes.ILOAD, "name");
  		assertSame(m.instructions.getLast(), matcher.cursor);
  
  		// should set cursor to null when var mismatch
  		matcher.cursor = m.instructions.getFirst();
  		matcher.vars.put("name", new VarInsnNode(Opcodes.ILOAD, 13));
  		matcher.nextIsVar(Opcodes.ILOAD, "name");
  		assertNull(matcher.cursor);
  
  		// should set cursor to next instruction when match
  		matcher.cursor = m.instructions.getFirst();
  		matcher.vars.put("name", new VarInsnNode(Opcodes.ILOAD, 42));
  		matcher.nextIsVar(Opcodes.ILOAD, "name");
  		assertSame(m.instructions.getLast(), matcher.cursor);
  
  		// should not do anything when cursor is null
  		matcher.cursor = null;
  		matcher.nextIsVar(Opcodes.ILOAD, "name");
  	}
  
  	@Test
  	public void nextIsInvoke() {
  		m.visitInsn(Opcodes.NOP);
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "owner", "name", "()V", false);
  
  		// should set cursor to null when opcode mismatch
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsInvoke(Opcodes.INVOKESTATIC, "owner", "name", "()V");
  		assertNull(matcher.cursor);
  
  		// should set cursor to null when owner mismatch
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsInvoke(Opcodes.INVOKEVIRTUAL, "another_owner", "name",
  				"()V");
  		assertNull(matcher.cursor);
  
  		// should set cursor to null when name mismatch
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsInvoke(Opcodes.INVOKEVIRTUAL, "owner", "another_name",
  				"()V");
  		assertNull(matcher.cursor);
  
  		// should set cursor to null when descriptor mismatch
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsInvoke(Opcodes.INVOKEVIRTUAL, "owner", "name",
  				"(Lanother_descriptor;)V");
  		assertNull(matcher.cursor);
  
  		// should set cursor to next instruction when match
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsInvoke(Opcodes.INVOKEVIRTUAL, "owner", "name", "()V");
  		assertSame(m.instructions.getLast(), matcher.cursor);
  
  		// should not do anything when cursor is null
  		matcher.cursor = null;
  		matcher.nextIsInvoke(Opcodes.INVOKEVIRTUAL, "owner", "name", "()V");
  	}
  
  	@Test
  	public void nextIsType() {
  		m.visitInsn(Opcodes.NOP);
  		m.visitTypeInsn(Opcodes.NEW, "descriptor");
  
  		// should set cursor to null when opcode mismatch
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsType(Opcodes.CHECKCAST, "descriptor");
  		assertNull(matcher.cursor);
  
  		// should set cursor to null when descriptor mismatch
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsType(Opcodes.NEW, "another_descriptor");
  		assertNull(matcher.cursor);
  
  		// should set cursor to next instruction when match
  		matcher.cursor = m.instructions.getFirst();
  		matcher.nextIsType(Opcodes.NEW, "descriptor");
  		assertSame(m.instructions.getLast(), matcher.cursor);
  
  		// should not do anything when cursor is null
  		matcher.cursor = null;
  		matcher.nextIsType(Opcodes.NEW, "descriptor");
  	}
  
  	@Test
  	public void firstIsALoad0() {
  		// should set cursor to null when opcode mismatch
  		m.visitInsn(Opcodes.NOP);
  		matcher.firstIsALoad0(m);
  		assertNull(matcher.cursor);
  
  		// should set cursor to null when var mismatch
  		m.instructions.clear();
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		matcher.firstIsALoad0(m);
  		assertNull(matcher.cursor);
  
  		// should set cursor to first instruction when match
  		m.instructions.clear();
  		m.visitVarInsn(Opcodes.ALOAD, 0);
  		matcher.firstIsALoad0(m);
  		assertSame(m.instructions.getLast(), matcher.cursor);
  	}
  
  }
  