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/*******************************************************************************
* 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);
}
}
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