1 files changed, 135 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/android/desugar/DesugarLongCompareTest.java b/src/test/java/com/google/devtools/build/android/desugar/DesugarLongCompareTest.java
new file mode 100644
index 0000000000..708fc8e666
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/android/desugar/DesugarLongCompareTest.java
@@ -0,0 +1,135 @@
+// Copyright 2017 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.google.devtools.build.android.desugar;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.fail;
+import static org.objectweb.asm.Opcodes.INVOKESTATIC;
+
+import com.google.devtools.build.android.desugar.testdata.ClassCallingLongCompare;
+import java.io.IOException;
+import java.util.concurrent.atomic.AtomicInteger;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.MethodVisitor;
+import org.objectweb.asm.Opcodes;
+
+/** The test case for the rewriter rewriting a call of Long.compare(long, long) to lcmp. */
+@RunWith(JUnit4.class)
+public class DesugarLongCompareTest {
+
+  @Test
+  public void testClassCallingLongCompareHasNoReferenceToLong_compare() {
+    try {
+      ClassReader reader = new ClassReader(ClassCallingLongCompare.class.getName());
+
+      AtomicInteger counter = new AtomicInteger(0);
+
+      reader.accept(
+          new ClassVisitor(Opcodes.ASM5) {
+            @Override
+            public MethodVisitor visitMethod(
+                int access, String name, String desc, String signature, String[] exceptions) {
+              return new MethodVisitor(api) {
+                @Override
+                public void visitMethodInsn(
+                    int opcode, String owner, String name, String desc, boolean itf) {
+                  if (opcode == INVOKESTATIC
+                      && owner.equals("java/lang/Long")
+                      && name.equals("compare")
+                      && desc.equals("(JJ)I")) {
+                    counter.incrementAndGet();
+                  }
+                }
+              };
+            }
+          },
+          0);
+      assertThat(counter.get()).isEqualTo(0);
+    } catch (IOException e) {
+      fail();
+    }
+  }
+
+  @Test
+  public void testCompareLongWithLambda() {
+    assertThat(ClassCallingLongCompare.compareLongWithLambda(1, 0)).isEqualTo(1);
+    assertThat(ClassCallingLongCompare.compareLongWithLambda(1, 1)).isEqualTo(0);
+    assertThat(ClassCallingLongCompare.compareLongWithLambda(1, 2)).isEqualTo(-1);
+    assertThat(ClassCallingLongCompare.compareLongWithLambda(Long.MAX_VALUE, Long.MIN_VALUE))
+        .isEqualTo(1);
+    assertThat(ClassCallingLongCompare.compareLongWithLambda(Long.MAX_VALUE, Long.MAX_VALUE))
+        .isEqualTo(0);
+    assertThat(ClassCallingLongCompare.compareLongWithLambda(Long.MIN_VALUE, Long.MAX_VALUE))
+        .isEqualTo(-1);
+  }
+
+  @Test
+  public void testCompareLongWithMethodReference() {
+    assertThat(ClassCallingLongCompare.compareLongWithMethodReference(1, 0)).isEqualTo(1);
+    assertThat(ClassCallingLongCompare.compareLongWithMethodReference(1, 1)).isEqualTo(0);
+    assertThat(ClassCallingLongCompare.compareLongWithMethodReference(1, 2)).isEqualTo(-1);
+    assertThat(
+            ClassCallingLongCompare.compareLongWithMethodReference(Long.MAX_VALUE, Long.MIN_VALUE))
+        .isEqualTo(1);
+    assertThat(
+            ClassCallingLongCompare.compareLongWithMethodReference(Long.MAX_VALUE, Long.MAX_VALUE))
+        .isEqualTo(0);
+    assertThat(
+            ClassCallingLongCompare.compareLongWithMethodReference(Long.MIN_VALUE, Long.MAX_VALUE))
+        .isEqualTo(-1);
+  }
+
+  @Test
+  public void testcompareLongByCallingLong_compare() {
+    assertThat(ClassCallingLongCompare.compareLongByCallingLong_compare(1, 0)).isEqualTo(1);
+    assertThat(ClassCallingLongCompare.compareLongByCallingLong_compare(1, 1)).isEqualTo(0);
+    assertThat(ClassCallingLongCompare.compareLongByCallingLong_compare(1, 2)).isEqualTo(-1);
+    assertThat(
+            ClassCallingLongCompare.compareLongByCallingLong_compare(
+                Long.MAX_VALUE, Long.MIN_VALUE))
+        .isEqualTo(1);
+    assertThat(
+            ClassCallingLongCompare.compareLongByCallingLong_compare(
+                Long.MAX_VALUE, Long.MAX_VALUE))
+        .isEqualTo(0);
+    assertThat(
+            ClassCallingLongCompare.compareLongByCallingLong_compare(
+                Long.MIN_VALUE, Long.MAX_VALUE))
+        .isEqualTo(-1);
+  }
+
+  @Test
+  public void testcompareLongByCallingLong_compare2() {
+    assertThat(ClassCallingLongCompare.compareLongByCallingLong_compare2(1, 0)).isEqualTo("g");
+    assertThat(ClassCallingLongCompare.compareLongByCallingLong_compare2(1, 1)).isEqualTo("e");
+    assertThat(ClassCallingLongCompare.compareLongByCallingLong_compare2(0, 1)).isEqualTo("l");
+
+    assertThat(
+            ClassCallingLongCompare.compareLongByCallingLong_compare2(
+                Long.MAX_VALUE, Long.MIN_VALUE))
+        .isEqualTo("g");
+    assertThat(
+            ClassCallingLongCompare.compareLongByCallingLong_compare2(
+                Long.MAX_VALUE, Long.MAX_VALUE))
+        .isEqualTo("e");
+    assertThat(
+            ClassCallingLongCompare.compareLongByCallingLong_compare2(
+                Long.MIN_VALUE, Long.MAX_VALUE))
+        .isEqualTo("l");
+  }
+}