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KotlinUnsafeCastOperatorFilterTest.java
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KotlinUnsafeCastOperatorFilterTest.java
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/*******************************************************************************
* Copyright (c) 2009, 2021 Mountainminds GmbH & Co. KG and Contributors
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*
* 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 KotlinUnsafeCastOperatorFilter}.
*/
public class KotlinUnsafeCastOperatorFilterTest extends FilterTestBase {
private final KotlinUnsafeCastOperatorFilter filter = new KotlinUnsafeCastOperatorFilter();
private final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0,
"name", "()V", null, null);
@Test
public void should_filter() {
context.classAnnotations
.add(KotlinGeneratedFilter.KOTLIN_METADATA_DESC);
final Label label = new Label();
m.visitInsn(Opcodes.DUP);
m.visitJumpInsn(Opcodes.IFNONNULL, label);
final AbstractInsnNode expectedFrom = m.instructions.getLast();
m.visitTypeInsn(Opcodes.NEW, "kotlin/TypeCastException");
m.visitInsn(Opcodes.DUP);
m.visitLdcInsn("null cannot be cast to non-null type kotlin.String");
m.visitMethodInsn(Opcodes.INVOKESPECIAL, "kotlin/TypeCastException",
"<init>", "(Ljava/lang/String;)V", false);
m.visitInsn(Opcodes.ATHROW);
final AbstractInsnNode expectedTo = m.instructions.getLast();
m.visitLabel(label);
filter.filter(m, context, output);
assertIgnored(new Range(expectedFrom, expectedTo));
}
@Test
public void should_filter_Kotlin_1_4() {
context.classAnnotations
.add(KotlinGeneratedFilter.KOTLIN_METADATA_DESC);
final Label label = new Label();
m.visitInsn(Opcodes.DUP);
m.visitJumpInsn(Opcodes.IFNONNULL, label);
final AbstractInsnNode expectedFrom = m.instructions.getLast();
m.visitTypeInsn(Opcodes.NEW, "java/lang/NullPointerException");
m.visitInsn(Opcodes.DUP);
m.visitLdcInsn("null cannot be cast to non-null type kotlin.String");
m.visitMethodInsn(Opcodes.INVOKESPECIAL,
"java/lang/NullPointerException", "<init>",
"(Ljava/lang/String;)V", false);
m.visitInsn(Opcodes.ATHROW);
final AbstractInsnNode expectedTo = m.instructions.getLast();
m.visitLabel(label);
filter.filter(m, context, output);
assertIgnored(new Range(expectedFrom, expectedTo));
}
/**
* For
*
* <pre>
* fun f(s: String?): String {
* return s as String
* }
* </pre>
*
* bytecode generated by Kotlin compiler version 1.4 is different from
* bytecode generated by version 1.5, unfortunately bytecode generated by
* later is the same as bytecode that both versions generate for
*
* <pre>
* fun f(s: String?): String {
* if (s == null)
* throw NullPointerException("null cannot be cast to non-null type kotlin.String")
* return s
* }
* </pre>
*/
@Test
public void should_filter_Kotlin_1_5() {
context.classAnnotations
.add(KotlinGeneratedFilter.KOTLIN_METADATA_DESC);
final Label label = new Label();
m.visitJumpInsn(Opcodes.IFNONNULL, label);
final AbstractInsnNode expectedFrom = m.instructions.getLast();
m.visitTypeInsn(Opcodes.NEW, "java/lang/NullPointerException");
m.visitInsn(Opcodes.DUP);
m.visitLdcInsn("null cannot be cast to non-null type kotlin.String");
m.visitMethodInsn(Opcodes.INVOKESPECIAL,
"java/lang/NullPointerException", "<init>",
"(Ljava/lang/String;)V", false);
m.visitInsn(Opcodes.ATHROW);
final AbstractInsnNode expectedTo = m.instructions.getLast();
m.visitLabel(label);
m.visitVarInsn(Opcodes.ALOAD, 0);
filter.filter(m, context, output);
assertIgnored(new Range(expectedFrom, expectedTo));
}
@Test
public void should_filter_Kotlin_1_6() {
context.classAnnotations
.add(KotlinGeneratedFilter.KOTLIN_METADATA_DESC);
final Label label = new Label();
m.visitInsn(Opcodes.DUP);
m.visitJumpInsn(Opcodes.IFNONNULL, label);
final AbstractInsnNode expectedFrom = m.instructions.getLast();
m.visitInsn(Opcodes.POP);
m.visitTypeInsn(Opcodes.NEW, "java/lang/NullPointerException");
m.visitInsn(Opcodes.DUP);
m.visitLdcInsn("null cannot be cast to non-null type kotlin.String");
m.visitMethodInsn(Opcodes.INVOKESPECIAL,
"java/lang/NullPointerException", "<init>",
"(Ljava/lang/String;)V", false);
m.visitInsn(Opcodes.ATHROW);
final AbstractInsnNode expectedTo = m.instructions.getLast();
m.visitLabel(label);
filter.filter(m, context, output);
assertIgnored(new Range(expectedFrom, expectedTo));
}
@Test
public void should_not_filter_when_not_kotlin() {
m.visitInsn(Opcodes.DUP);
final Label label = new Label();
m.visitJumpInsn(Opcodes.IFNONNULL, label);
m.visitTypeInsn(Opcodes.NEW, "java/lang/NullPointerException");
m.visitInsn(Opcodes.DUP);
m.visitLdcInsn("null cannot be cast to non-null type kotlin.String");
m.visitMethodInsn(Opcodes.INVOKESPECIAL,
"java/lang/NullPointerException", "<init>",
"(Ljava/lang/String;)V", false);
m.visitInsn(Opcodes.ATHROW);
m.visitLabel(label);
filter.filter(m, context, output);
assertIgnored();
}
}