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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:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.internal.instr;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.util.Printer;
import org.objectweb.asm.util.Textifier;
import org.objectweb.asm.util.TraceMethodVisitor;
/**
* Unit tests for {@link InstrSupport}.
*/
public class InstrSupportTest {
private Printer printer;
private TraceMethodVisitor trace;
@Rule
public ExpectedException exception = ExpectedException.none();
@Before
public void setup() {
printer = new Textifier();
trace = new TraceMethodVisitor(printer);
}
@Test
public void classReaderFor_should_read_java_13_class() {
final byte[] bytes = createJava13Class();
final ClassReader classReader = InstrSupport.classReaderFor(bytes);
classReader.accept(new ClassVisitor(InstrSupport.ASM_API_VERSION) {
@Override
public void visit(final int version, final int access,
final String name, final String signature,
final String superName, final String[] interfaces) {
assertEquals(Opcodes.V12 + 1, version);
}
}, 0);
assertArrayEquals(createJava13Class(), bytes);
}
private static byte[] createJava13Class() {
final ClassWriter cw = new ClassWriter(0);
cw.visit(Opcodes.V12 + 1, 0, "Foo", null, "java/lang/Object", null);
cw.visitEnd();
return cw.toByteArray();
}
@Test
public void getMajorVersion_should_read_unsigned_two_bytes_at_offset_6() {
final byte[] bytes = new byte[] { //
(byte) 0xCA, (byte) 0xFE, (byte) 0xBA, (byte) 0xBE, // magic
(byte) 0xFF, (byte) 0xFF, // minor_version
(byte) 0x80, (byte) 0x12 // major_version
};
assertEquals(32786, InstrSupport.getMajorVersion(bytes));
}
@Test
public void setMajorVersion_should_write_unsigned_two_bytes_at_offset_6() {
final byte[] bytes = new byte[8];
InstrSupport.setMajorVersion(32786, bytes);
assertArrayEquals(
new byte[] { (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, // magic
(byte) 0x00, (byte) 0x00, // minor_version
(byte) 0x80, (byte) 0x12 // major_version
}, bytes);
}
@Test
public void getMajorVersion_should_read_major_version_from_ClassReader_at_offset_relative_to_constant_pool() {
final byte[] bytes = new byte[] { //
(byte) 0xFF, // before class bytes
(byte) 0xCA, (byte) 0xFE, (byte) 0xBA, (byte) 0xBE, // magic
0x00, 0x03, // minor_version
(byte) 0x80, 0x12, // major_version
0x00, 0x02, // constant_pool_count
0x01, 0x00, 0x00 // constant_pool
};
assertEquals(32786,
InstrSupport.getMajorVersion(new ClassReader(bytes, 1, -1)));
}
@Test
public void needFrames_should_return_false_for_versions_less_than_1_6() {
assertFalse(InstrSupport.needsFrames(Opcodes.V1_1));
assertFalse(InstrSupport.needsFrames(Opcodes.V1_2));
assertFalse(InstrSupport.needsFrames(Opcodes.V1_3));
assertFalse(InstrSupport.needsFrames(Opcodes.V1_4));
assertFalse(InstrSupport.needsFrames(Opcodes.V1_5));
}
@Test
public void needFrames_should_return_true_for_versions_greater_than_or_equal_to_1_6() {
assertTrue(InstrSupport.needsFrames(Opcodes.V1_6));
assertTrue(InstrSupport.needsFrames(Opcodes.V1_7));
assertTrue(InstrSupport.needsFrames(Opcodes.V1_8));
assertTrue(InstrSupport.needsFrames(Opcodes.V9));
assertTrue(InstrSupport.needsFrames(Opcodes.V10));
assertTrue(InstrSupport.needsFrames(Opcodes.V11));
assertTrue(InstrSupport.needsFrames(Opcodes.V12));
assertTrue(InstrSupport.needsFrames(Opcodes.V12 + 1));
assertTrue(InstrSupport.needsFrames(0x0100));
}
@Test
public void assertNotIntrumented_should_accept_non_jacoco_memebers() {
InstrSupport.assertNotInstrumented("run", "Foo");
}
@Test
public void assertNotIntrumented_should_throw_exception_when_jacoco_data_field_is_present() {
exception.expect(IllegalStateException.class);
exception.expectMessage(
"Cannot process instrumented class Foo. Please supply original non-instrumented classes.");
InstrSupport.assertNotInstrumented("$jacocoData", "Foo");
}
@Test
public void assertNotIntrumented_should_throw_exception_when_jacoco_init_method_is_present() {
exception.expect(IllegalStateException.class);
exception.expectMessage(
"Cannot process instrumented class Foo. Please supply original non-instrumented classes.");
InstrSupport.assertNotInstrumented("$jacocoInit", "Foo");
}
@Test
public void testPushIntM2147483648() {
InstrSupport.push(trace, -2147483648);
assertInstruction("LDC -2147483648");
}
@Test
public void testPushIntM32768() {
InstrSupport.push(trace, -32768);
assertInstruction("SIPUSH -32768");
}
@Test
public void testPushIntM128() {
InstrSupport.push(trace, -128);
assertInstruction("BIPUSH -128");
}
@Test
public void testPushIntM1() {
InstrSupport.push(trace, -1);
assertInstruction("ICONST_M1");
}
@Test
public void testPushInt0() {
InstrSupport.push(trace, 0);
assertInstruction("ICONST_0");
}
@Test
public void testPushInt1() {
InstrSupport.push(trace, 1);
assertInstruction("ICONST_1");
}
@Test
public void testPushInt2() {
InstrSupport.push(trace, 2);
assertInstruction("ICONST_2");
}
@Test
public void testPushInt3() {
InstrSupport.push(trace, 3);
assertInstruction("ICONST_3");
}
@Test
public void testPushInt4() {
InstrSupport.push(trace, 4);
assertInstruction("ICONST_4");
}
@Test
public void testPushInt5() {
InstrSupport.push(trace, 5);
assertInstruction("ICONST_5");
}
@Test
public void testPushInt127() {
InstrSupport.push(trace, 127);
assertInstruction("BIPUSH 127");
}
@Test
public void testPushInt32767() {
InstrSupport.push(trace, 32767);
assertInstruction("SIPUSH 32767");
}
@Test
public void testPushInt2147483647() {
InstrSupport.push(trace, 2147483647);
assertInstruction("LDC 2147483647");
}
private void assertInstruction(String expected) {
assertEquals(1, printer.getText().size());
assertEquals(expected, printer.getText().get(0).toString().trim());
}
}
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