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 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;
  
  /**
   * Unit test for {@link KotlinCoroutineFilter}.
   */
  public class KotlinCoroutineFilterTest extends FilterTestBase {
  
  	private final IFilter filter = new KotlinCoroutineFilter();
  
  	@Test
  	public void should_filter_suspending_lambdas_generated_by_Kotlin_1_3_30() {
  		final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0,
  				"invokeSuspend", "(Ljava/lang/Object;)Ljava/lang/Object;", null,
  				null);
  		context.classAnnotations
  				.add(KotlinGeneratedFilter.KOTLIN_METADATA_DESC);
  
  		m.visitLabel(new Label());
  		final Range range1 = new Range();
  		range1.fromInclusive = m.instructions.getLast();
  		m.visitMethodInsn(Opcodes.INVOKESTATIC,
  				"kotlin/coroutines/intrinsics/IntrinsicsKt",
  				"getCOROUTINE_SUSPENDED", "()Ljava/lang/Object;", false);
  		m.visitVarInsn(Opcodes.ASTORE, 4);
  
  		m.visitVarInsn(Opcodes.ALOAD, 0);
  		// line of "runBlocking"
  		m.visitFieldInsn(Opcodes.GETFIELD, "Target", "label", "I");
  		final Label dflt = new Label();
  		final Label state0 = new Label();
  		final Label state1 = new Label();
  		m.visitTableSwitchInsn(0, 1, dflt, state0, state1);
  
  		m.visitLabel(state0);
  
  		{
  			m.visitVarInsn(Opcodes.ALOAD, 1);
  			m.visitMethodInsn(Opcodes.INVOKESTATIC, "kotlin/ResultKt",
  					"throwOnFailure", "(Ljava/lang/Object;)V", false);
  			range1.toInclusive = m.instructions.getLast();
  		}
  
  		// line before "suspendingFunction"
  		m.visitInsn(Opcodes.NOP);
  
  		// line of "suspendingFunction"
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "", "suspendingFunction",
  				"(Lkotlin/coroutines/Continuation;)Ljava/lang/Object;", false);
  
  		m.visitInsn(Opcodes.DUP);
  		final Range range2 = new Range();
  		range2.fromInclusive = m.instructions.getLast();
  		m.visitVarInsn(Opcodes.ALOAD, 4);
  		final Label continuationLabelAfterLoadedResult = new Label();
  		m.visitJumpInsn(Opcodes.IF_ACMPNE, continuationLabelAfterLoadedResult);
  		// line of "runBlocking"
  		m.visitVarInsn(Opcodes.ALOAD, 4);
  		m.visitInsn(Opcodes.ARETURN);
  
  		m.visitLabel(state1);
  
  		m.visitVarInsn(Opcodes.ALOAD, 0);
  		m.visitFieldInsn(Opcodes.GETFIELD, "Target", "I$0", "I");
  		m.visitVarInsn(Opcodes.ISTORE, 3);
  
  		{
  			m.visitVarInsn(Opcodes.ALOAD, 1);
  			m.visitMethodInsn(Opcodes.INVOKESTATIC, "kotlin/ResultKt",
  					"throwOnFailure", "(Ljava/lang/Object;)V", false);
  		}
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		range2.toInclusive = m.instructions.getLast();
  		m.visitLabel(continuationLabelAfterLoadedResult);
  
  		// line after "suspendingFunction"
  		m.visitInsn(Opcodes.NOP);
  		m.visitInsn(Opcodes.ARETURN);
  
  		m.visitLabel(dflt);
  		final Range range0 = new Range();
  		range0.fromInclusive = m.instructions.getLast();
  		m.visitTypeInsn(Opcodes.NEW, "java/lang/IllegalStateException");
  		m.visitInsn(Opcodes.DUP);
  		m.visitLdcInsn("call to 'resume' before 'invoke' with coroutine");
  		m.visitMethodInsn(Opcodes.INVOKESPECIAL,
  				"java/lang/IllegalStateException", "<init>",
  				"(Ljava/lang/String;)V", false);
  		m.visitInsn(Opcodes.ATHROW);
  		range0.toInclusive = m.instructions.getLast();
  
  		filter.filter(m, context, output);
  
  		assertIgnored(range0, range1, range2);
  	}
  
  	/**
  	 * <pre>
  	 *     runBlocking {
  	 *         val x = 42
  	 *         nop(x)
  	 *         suspendingFunction()
  	 *         nop(x)
  	 *     }
  	 * </pre>
  	 */
  	@Test
  	public void should_filter_suspending_lambdas() {
  		final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0,
  				"invokeSuspend", "(Ljava/lang/Object;)Ljava/lang/Object;", null,
  				null);
  		context.classAnnotations
  				.add(KotlinGeneratedFilter.KOTLIN_METADATA_DESC);
  
  		m.visitLabel(new Label());
  		final Range range1 = new Range();
  		range1.fromInclusive = m.instructions.getLast();
  		m.visitMethodInsn(Opcodes.INVOKESTATIC,
  				"kotlin/coroutines/intrinsics/IntrinsicsKt",
  				"getCOROUTINE_SUSPENDED", "()Ljava/lang/Object;", false);
  		m.visitVarInsn(Opcodes.ASTORE, 4);
  
  		m.visitVarInsn(Opcodes.ALOAD, 0);
  		// line of "runBlocking"
  		m.visitFieldInsn(Opcodes.GETFIELD, "Target", "label", "I");
  		final Label dflt = new Label();
  		final Label state0 = new Label();
  		final Label state1 = new Label();
  		m.visitTableSwitchInsn(0, 1, dflt, state0, state1);
  
  		m.visitLabel(state0);
  
  		{
  			m.visitVarInsn(Opcodes.ALOAD, 1);
  			m.visitInsn(Opcodes.DUP);
  			m.visitTypeInsn(Opcodes.INSTANCEOF, "kotlin/Result$Failure");
  			Label label = new Label();
  			m.visitJumpInsn(Opcodes.IFEQ, label);
  			m.visitTypeInsn(Opcodes.CHECKCAST, "kotlin/Result$Failure");
  			m.visitFieldInsn(Opcodes.GETFIELD, "kotlin/Result$Failure",
  					"exception", "Ljava/lang/Throwable");
  			m.visitInsn(Opcodes.ATHROW);
  			m.visitInsn(Opcodes.POP);
  			range1.toInclusive = m.instructions.getLast();
  			m.visitLabel(label);
  		}
  
  		// line before "suspendingFunction"
  		m.visitInsn(Opcodes.NOP);
  
  		// line of "suspendingFunction"
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "", "suspendingFunction",
  				"(Lkotlin/coroutines/Continuation;)Ljava/lang/Object;", false);
  
  		m.visitInsn(Opcodes.DUP);
  		final Range range2 = new Range();
  		range2.fromInclusive = m.instructions.getLast();
  		m.visitVarInsn(Opcodes.ALOAD, 4);
  		final Label continuationLabelAfterLoadedResult = new Label();
  		m.visitJumpInsn(Opcodes.IF_ACMPNE, continuationLabelAfterLoadedResult);
  		// line of "runBlocking"
  		m.visitVarInsn(Opcodes.ALOAD, 4);
  		m.visitInsn(Opcodes.ARETURN);
  
  		m.visitLabel(state1);
  
  		m.visitVarInsn(Opcodes.ALOAD, 0);
  		m.visitFieldInsn(Opcodes.GETFIELD, "Target", "I$0", "I");
  		m.visitVarInsn(Opcodes.ISTORE, 3);
  
  		{
  			m.visitVarInsn(Opcodes.ALOAD, 1);
  			m.visitInsn(Opcodes.DUP);
  			m.visitTypeInsn(Opcodes.INSTANCEOF, "kotlin/Result$Failure");
  			final Label label = new Label();
  			m.visitJumpInsn(Opcodes.IFEQ, label);
  			m.visitTypeInsn(Opcodes.CHECKCAST, "kotlin/Result$Failure");
  			m.visitFieldInsn(Opcodes.GETFIELD, "kotlin/Result$Failure",
  					"exception", "Ljava/lang/Throwable");
  			m.visitInsn(Opcodes.ATHROW);
  			m.visitInsn(Opcodes.POP);
  			m.visitLabel(label);
  		}
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		range2.toInclusive = m.instructions.getLast();
  		m.visitLabel(continuationLabelAfterLoadedResult);
  
  		// line after "suspendingFunction"
  		m.visitInsn(Opcodes.NOP);
  		m.visitInsn(Opcodes.ARETURN);
  
  		m.visitLabel(dflt);
  		final Range range0 = new Range();
  		range0.fromInclusive = m.instructions.getLast();
  		m.visitTypeInsn(Opcodes.NEW, "java/lang/IllegalStateException");
  		m.visitInsn(Opcodes.DUP);
  		m.visitLdcInsn("call to 'resume' before 'invoke' with coroutine");
  		m.visitMethodInsn(Opcodes.INVOKESPECIAL,
  				"java/lang/IllegalStateException", "<init>",
  				"(Ljava/lang/String;)V", false);
  		m.visitInsn(Opcodes.ATHROW);
  		range0.toInclusive = m.instructions.getLast();
  
  		filter.filter(m, context, output);
  
  		assertIgnored(range0, range1, range2);
  	}
  
  	/**
  	 * <pre>
  	 *     suspend fun example() {
  	 *         suspendingFunction()
  	 *         nop()
  	 *     }
  	 * </pre>
  	 */
  	@Test
  	public void should_filter_suspending_functions() {
  		final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION,
  				Opcodes.ACC_STATIC, "example",
  				"(Lkotlin/coroutines/Continuation;)Ljava/lang/Object;", null,
  				null);
  		context.classAnnotations
  				.add(KotlinGeneratedFilter.KOTLIN_METADATA_DESC);
  
  		final int continuationArgumentIndex = 0;
  		final int continuationIndex = 2;
  
  		m.visitVarInsn(Opcodes.ALOAD, continuationArgumentIndex);
  		final Range range1 = new Range();
  		range1.fromInclusive = m.instructions.getLast();
  		m.visitTypeInsn(Opcodes.INSTANCEOF, "ExampleKt$example$1");
  		final Label createStateInstance = new Label();
  		m.visitJumpInsn(Opcodes.IFEQ, createStateInstance);
  
  		m.visitVarInsn(Opcodes.ALOAD, continuationArgumentIndex);
  		m.visitTypeInsn(Opcodes.CHECKCAST, "ExampleKt$example$1");
  		m.visitVarInsn(Opcodes.ASTORE, continuationIndex);
  
  		m.visitVarInsn(Opcodes.ALOAD, continuationIndex);
  		m.visitFieldInsn(Opcodes.GETFIELD, "ExampleKt$example$1", "label", "I");
  
  		m.visitLdcInsn(Integer.valueOf(Integer.MIN_VALUE));
  		m.visitInsn(Opcodes.IAND);
  		m.visitJumpInsn(Opcodes.IFEQ, createStateInstance);
  
  		m.visitVarInsn(Opcodes.ALOAD, continuationIndex);
  		m.visitInsn(Opcodes.DUP);
  		m.visitFieldInsn(Opcodes.GETFIELD, "ExampleKt$example$1", "label", "I");
  
  		m.visitLdcInsn(Integer.valueOf(Integer.MIN_VALUE));
  		m.visitInsn(Opcodes.ISUB);
  		m.visitFieldInsn(Opcodes.PUTFIELD, "ExampleKt$example$1", "label", "I");
  
  		final Label afterCoroutineStateCreated = new Label();
  		m.visitJumpInsn(Opcodes.GOTO, afterCoroutineStateCreated);
  
  		m.visitLabel(createStateInstance);
  
  		m.visitTypeInsn(Opcodes.NEW, "ExampleKt$example$1");
  		m.visitInsn(Opcodes.DUP);
  		m.visitVarInsn(Opcodes.ALOAD, continuationArgumentIndex);
  		m.visitMethodInsn(Opcodes.INVOKESPECIAL, "ExampleKt$example$1",
  				"<init>", "(Lkotlin/coroutines/Continuation;)V", false);
  
  		m.visitVarInsn(Opcodes.ASTORE, continuationIndex);
  
  		m.visitLabel(afterCoroutineStateCreated);
  
  		m.visitVarInsn(Opcodes.ALOAD, continuationIndex);
  		m.visitFieldInsn(Opcodes.GETFIELD, "ExampleKt$example$1", "result",
  				"Ljava/lang/Object;");
  		m.visitVarInsn(Opcodes.ASTORE, 1);
  
  		m.visitMethodInsn(Opcodes.INVOKESTATIC,
  				"kotlin/coroutines/intrinsics/IntrinsicsKt",
  				"getCOROUTINE_SUSPENDED", "()Ljava/lang/Object;", false);
  
  		// line of "fun"
  		m.visitVarInsn(Opcodes.ASTORE, 3);
  
  		m.visitVarInsn(Opcodes.ALOAD, continuationIndex);
  		m.visitFieldInsn(Opcodes.GETFIELD, "ExampleKt$example$1", "label", "I");
  		final Label dflt = new Label();
  		final Label state0 = new Label();
  		final Label state1 = new Label();
  		m.visitTableSwitchInsn(0, 1, dflt, state0, state1);
  
  		m.visitLabel(state0);
  
  		{
  			m.visitVarInsn(Opcodes.ALOAD, 1);
  			m.visitInsn(Opcodes.DUP);
  			m.visitTypeInsn(Opcodes.INSTANCEOF, "kotlin/Result$Failure");
  			Label label = new Label();
  			m.visitJumpInsn(Opcodes.IFEQ, label);
  			m.visitTypeInsn(Opcodes.CHECKCAST, "kotlin/Result$Failure");
  			m.visitFieldInsn(Opcodes.GETFIELD, "kotlin/Result$Failure",
  					"exception", "Ljava/lang/Throwable");
  			m.visitInsn(Opcodes.ATHROW);
  			m.visitInsn(Opcodes.POP);
  			range1.toInclusive = m.instructions.getLast();
  			m.visitLabel(label);
  		}
  
  		// line of "suspendingFunction"
  		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "", "suspendingFunction",
  				"(Lkotlin/coroutines/Continuation;)Ljava/lang/Object;", false);
  
  		m.visitInsn(Opcodes.DUP);
  		final Range range2 = new Range();
  		range2.fromInclusive = m.instructions.getLast();
  		m.visitVarInsn(Opcodes.ALOAD, 3);
  		final Label continuationLabelAfterLoadedResult = new Label();
  		m.visitJumpInsn(Opcodes.IF_ACMPNE, continuationLabelAfterLoadedResult);
  		// line of "fun"
  		m.visitVarInsn(Opcodes.ALOAD, 3);
  		m.visitInsn(Opcodes.ARETURN);
  
  		m.visitLabel(state1);
  
  		{
  			m.visitVarInsn(Opcodes.ALOAD, 1);
  			m.visitInsn(Opcodes.DUP);
  			m.visitTypeInsn(Opcodes.INSTANCEOF, "kotlin/Result$Failure");
  			final Label label = new Label();
  			m.visitJumpInsn(Opcodes.IFEQ, label);
  			m.visitTypeInsn(Opcodes.CHECKCAST, "kotlin/Result$Failure");
  			m.visitFieldInsn(Opcodes.GETFIELD, "kotlin/Result$Failure",
  					"exception", "Ljava/lang/Throwable");
  			m.visitInsn(Opcodes.ATHROW);
  			m.visitInsn(Opcodes.POP);
  			m.visitLabel(label);
  		}
  		m.visitVarInsn(Opcodes.ALOAD, 1);
  		range2.toInclusive = m.instructions.getLast();
  		m.visitLabel(continuationLabelAfterLoadedResult);
  
  		// line after "suspendingFunction"
  		m.visitInsn(Opcodes.NOP);
  		m.visitInsn(Opcodes.ARETURN);
  
  		m.visitLabel(dflt);
  		final Range range0 = new Range();
  		range0.fromInclusive = m.instructions.getLast();
  		m.visitTypeInsn(Opcodes.NEW, "java/lang/IllegalStateException");
  		m.visitInsn(Opcodes.DUP);
  		m.visitLdcInsn("call to 'resume' before 'invoke' with coroutine");
  		m.visitMethodInsn(Opcodes.INVOKESPECIAL,
  				"java/lang/IllegalStateException", "<init>",
  				"(Ljava/lang/String;)V", false);
  		m.visitInsn(Opcodes.ATHROW);
  		range0.toInclusive = m.instructions.getLast();
  
  		filter.filter(m, context, output);
  
  		assertIgnored(range0, range1, range2);
  	}
  
  }
  