(WIP) add unit tests

org.jacoco.core.test/src/org/jacoco/core/internal/analysis/filter/AssertFilterTest.java

@@ -0,0 +1,146 @@
+/*******************************************************************************
+ * 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.Type;
+import org.objectweb.asm.tree.MethodNode;
+
+/**
+ * Unit tests for {@link AssertFilter}.
+ */
+public class AssertFilterTest extends FilterTestBase {
+
+	private final AssertFilter filter = new AssertFilter();
+
+	/**
+	 * <code><pre>
+	 * class Example {
+	 *   void example(boolean b) {
+	 *     ...
+	 *     assert b : "message";
+	 *     ...
+	 *   }
+	 * }
+	 * </pre></code>
+	 */
+	@Test
+	public void should_filter_static_initializer() {
+		context.className = "Example";
+		final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION,
+				Opcodes.ACC_STATIC, "<clinit>", "()V", null, null);
+
+		m.visitInsn(Opcodes.NOP);
+		m.visitLdcInsn(Type.getType("LExample;"));
+		final Range range = new Range();
+		range.fromInclusive = m.instructions.getLast();
+		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Class",
+				"desiredAssertionStatus", "()Z", false);
+		final Label label1 = new Label();
+		final Label label2 = new Label();
+		m.visitJumpInsn(Opcodes.IFNE, label1);
+		m.visitInsn(Opcodes.ICONST_1);
+		m.visitJumpInsn(Opcodes.GOTO, label2);
+		m.visitLabel(label1);
+		m.visitInsn(Opcodes.ICONST_0);
+		m.visitLabel(label2);
+		m.visitFieldInsn(Opcodes.PUTSTATIC, "Example", "$assertionsDisabled",
+				"Z");
+		range.toInclusive = m.instructions.getLast();
+		m.visitInsn(Opcodes.RETURN);
+
+		filter.filter(m, context, output);
+
+		assertIgnored(range);
+	}
+
+	/**
+	 * <code><pre>
+	 * class Example {
+	 *   static final f;
+	 *
+	 *   static {
+	 *     f = !Example.class.desiredAssertionStatus();
+	 *   }
+	 * }
+	 * </pre></code>
+	 */
+	@Test
+	public void should_not_filter_static_initializer_when_field_name_does_not_match() {
+		context.className = "Example";
+		final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION,
+				Opcodes.ACC_STATIC, "<clinit>", "()V", null, null);
+
+		m.visitLdcInsn(Type.getType("LExample;"));
+		m.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Class",
+				"desiredAssertionStatus", "()Z", false);
+		final Label label1 = new Label();
+		final Label label2 = new Label();
+		m.visitJumpInsn(Opcodes.IFNE, label1);
+		m.visitInsn(Opcodes.ICONST_1);
+		m.visitJumpInsn(Opcodes.GOTO, label2);
+		m.visitLabel(label1);
+		m.visitInsn(Opcodes.ICONST_0);
+		m.visitLabel(label2);
+		m.visitFieldInsn(Opcodes.PUTSTATIC, "Foo", "f", "Z");
+		m.visitInsn(Opcodes.RETURN);
+
+		filter.filter(m, context, output);
+
+		assertIgnored();
+	}
+
+	/**
+	 * <code><pre>
+	 * class Example {
+	 *   void example(boolean b) {
+	 *     ...
+	 *     assert b : "message";
+	 *     ...
+	 *   }
+	 * }
+	 * </pre></code>
+	 */
+	@Test
+	public void should_filter_assert() {
+		context.className = "Example";
+		final MethodNode m = new MethodNode(InstrSupport.ASM_API_VERSION, 0,
+				"example", "()V", null, null);
+
+		m.visitInsn(Opcodes.NOP);
+		m.visitFieldInsn(Opcodes.GETSTATIC, "Example", "$assertionsDisabled",
+				"Z");
+		final Label label = new Label();
+		m.visitJumpInsn(Opcodes.IFNE, label);
+		final Range range = new Range(m.instructions.getLast(),
+				m.instructions.getLast());
+		m.visitVarInsn(Opcodes.ILOAD, 1);
+		m.visitJumpInsn(Opcodes.IFNE, label);
+		m.visitTypeInsn(Opcodes.NEW, "java/lang/AssertionError");
+		m.visitInsn(Opcodes.DUP);
+		m.visitLdcInsn("message");
+		m.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/AssertionError",
+				"<init>", "(Ljava/lang/Object;)V", false);
+		m.visitInsn(Opcodes.ATHROW);
+		m.visitLabel(label);
+		m.visitInsn(Opcodes.NOP);
+
+		filter.filter(m, context, output);
+
+		assertIgnored(range);
+	}
+
+}

org.jacoco.core/src/org/jacoco/core/internal/analysis/filter/AssertFilter.java

@@ -0,0 +1,28 @@
+/*******************************************************************************
+ * 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.objectweb.asm.tree.MethodNode;
+
+/**
+ * Filters code that is generated for an <code>assert</code> statement.
+ */
+final class AssertFilter implements IFilter {
+
+	@Override
+	public void filter(final MethodNode methodNode,
+			final IFilterContext context, final IFilterOutput output) {
+		// TODO
+	}
+
+}