1 files changed, 113 insertions, 0 deletions
diff --git a/test/java/com/google/devtools/build/android/desugar/dependencies/MetadataCollectorTest.java b/test/java/com/google/devtools/build/android/desugar/dependencies/MetadataCollectorTest.java
new file mode 100644
index 0000000..e99abc4
--- /dev/null
+++ b/test/java/com/google/devtools/build/android/desugar/dependencies/MetadataCollectorTest.java
@@ -0,0 +1,113 @@
+// 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.dependencies;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.collect.ImmutableList;
+import com.google.devtools.build.android.desugar.proto.DesugarDeps.Dependency;
+import com.google.devtools.build.android.desugar.proto.DesugarDeps.DesugarDepsInfo;
+import com.google.devtools.build.android.desugar.proto.DesugarDeps.InterfaceDetails;
+import com.google.devtools.build.android.desugar.proto.DesugarDeps.InterfaceWithCompanion;
+import com.google.devtools.build.android.desugar.proto.DesugarDeps.Type;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link MetadataCollector}. */
+@RunWith(JUnit4.class)
+public class MetadataCollectorTest {
+
+  @Test
+  public void testEmptyAvoidsOutput() {
+    assertThat(new MetadataCollector(false).toByteArray()).isNull();
+  }
+
+  @Test
+  public void testAssumeCompanionClass() throws Exception {
+    MetadataCollector collector = new MetadataCollector(false);
+    collector.assumeCompanionClass("a", "b$$CC");
+    collector.assumeCompanionClass("b", "b$$CC");
+    collector.assumeCompanionClass("a", "a$$CC");
+
+    DesugarDepsInfo info = extractProto(collector);
+    assertThat(info.getAssumePresentList())
+        .containsExactly(
+            Dependency.newBuilder().setOrigin(wrapType("a")).setTarget(wrapType("b$$CC")).build(),
+            Dependency.newBuilder().setOrigin(wrapType("b")).setTarget(wrapType("b$$CC")).build(),
+            Dependency.newBuilder().setOrigin(wrapType("a")).setTarget(wrapType("a$$CC")).build());
+  }
+
+  @Test
+  public void testMissingImplementedInterface() throws Exception {
+    MetadataCollector collector = new MetadataCollector(true);
+    collector.missingImplementedInterface("a", "b");
+    collector.missingImplementedInterface("a", "c");
+    collector.missingImplementedInterface("c", "b");
+
+    DesugarDepsInfo info = extractProto(collector);
+    assertThat(info.getMissingInterfaceList())
+        .containsExactly(
+            Dependency.newBuilder().setOrigin(wrapType("a")).setTarget(wrapType("b")).build(),
+            Dependency.newBuilder().setOrigin(wrapType("a")).setTarget(wrapType("c")).build(),
+            Dependency.newBuilder().setOrigin(wrapType("c")).setTarget(wrapType("b")).build());
+  }
+
+  @Test
+  public void testRecordExtendedInterfaces() throws Exception {
+    MetadataCollector collector = new MetadataCollector(false);
+    collector.recordExtendedInterfaces("a", "b", "c");
+    collector.recordExtendedInterfaces("b");
+    collector.recordExtendedInterfaces("c", "d");
+
+    DesugarDepsInfo info = extractProto(collector);
+    assertThat(info.getInterfaceWithSupertypesList())
+        .containsExactly(
+            InterfaceDetails.newBuilder()
+                .setOrigin(wrapType("a"))
+                .addAllExtendedInterface(ImmutableList.of(wrapType("b"), wrapType("c")))
+                .build(),
+            InterfaceDetails.newBuilder()
+                .setOrigin(wrapType("c"))
+                .addAllExtendedInterface(ImmutableList.of(wrapType("d")))
+                .build());
+  }
+
+  @Test
+  public void testRecordDefaultMethods() throws Exception {
+    MetadataCollector collector = new MetadataCollector(false);
+    collector.recordDefaultMethods("a", 0);
+    collector.recordDefaultMethods("b", 1);
+
+    DesugarDepsInfo info = extractProto(collector);
+    assertThat(info.getInterfaceWithCompanionList())
+        .containsExactly(
+            InterfaceWithCompanion.newBuilder()
+                .setOrigin(wrapType("a"))
+                .setNumDefaultMethods(0)
+                .build(),
+            InterfaceWithCompanion.newBuilder()
+                .setOrigin(wrapType("b"))
+                .setNumDefaultMethods(1)
+                .build());
+  }
+
+  private static Type wrapType(String name) {
+    return Type.newBuilder().setBinaryName(name).build();
+  }
+
+  private DesugarDepsInfo extractProto(MetadataCollector collector) throws Exception {
+    return DesugarDepsInfo.parseFrom(collector.toByteArray());
+  }
+}