1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/analysis/config/BuildOptionsTest.java b/src/test/java/com/google/devtools/build/lib/analysis/config/BuildOptionsTest.java
index 10b8f685cd..fcb5cd895a 100644
--- a/src/test/java/com/google/devtools/build/lib/analysis/config/BuildOptionsTest.java
+++ b/src/test/java/com/google/devtools/build/lib/analysis/config/BuildOptionsTest.java
@@ -14,8 +14,10 @@
 package com.google.devtools.build.lib.analysis.config;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 
 import com.google.common.collect.ImmutableList;
+import com.google.devtools.build.lib.rules.cpp.CppOptions;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -47,4 +49,29 @@ public class BuildOptionsTest {
     BuildOptions b = BuildOptions.of(TEST_OPTIONS, options);
     assertEquals(a.toString(), b.toString());
   }
+
+  @Test
+  public void testOptionsEquality() throws Exception {
+    String[] options1 = new String[] { "--compilation_mode=opt" };
+    String[] options2 = new String[] { "--compilation_mode=dbg" };
+    // Distinct instances with the same values are equal:
+    assertEquals(BuildOptions.of(TEST_OPTIONS, options1), BuildOptions.of(TEST_OPTIONS, options1));
+    // Same fragments, different values aren't equal:
+    assertFalse(BuildOptions.of(TEST_OPTIONS, options1).equals(
+        BuildOptions.of(TEST_OPTIONS, options2)));
+    // Same values, different fragments aren't equal:
+    assertFalse(BuildOptions.of(TEST_OPTIONS, options1).equals(
+        BuildOptions.of(
+            ImmutableList.<Class<? extends FragmentOptions>>of(
+                BuildConfiguration.Options.class, CppOptions.class),
+            options1)));
+    // Same values and fragments, same original options are equal:
+    BuildOptions original1 = BuildOptions.of(TEST_OPTIONS, options1);
+    BuildOptions original2 = BuildOptions.of(TEST_OPTIONS, options2);
+    assertEquals(BuildOptions.of(TEST_OPTIONS, original1, options2),
+        BuildOptions.of(TEST_OPTIONS, original1, options2));
+    // Same values and fragments, different original options are not equal:
+    assertFalse(BuildOptions.of(TEST_OPTIONS, original1, options2).equals(
+        BuildOptions.of(TEST_OPTIONS, original2, options2)));
+  }
 }