1 files changed, 159 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcProviderTest.java b/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcProviderTest.java
new file mode 100644
index 0000000000..2b7f3fe6a3
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/rules/objc/ObjcProviderTest.java
@@ -0,0 +1,159 @@
+// 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.lib.rules.objc;
+
+import static com.google.common.truth.Truth.assertThat;
+import static com.google.common.truth.Truth.assertWithMessage;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.devtools.build.lib.rules.objc.ObjcProvider.Key;
+import com.google.devtools.build.lib.syntax.SkylarkNestedSet;
+import com.google.devtools.build.lib.vfs.PathFragment;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link ObjcProvider}. */
+@RunWith(JUnit4.class)
+public class ObjcProviderTest {
+
+  @Test
+  public void emptyProvider() {
+    ObjcProvider empty = new ObjcProvider.Builder().build();
+    assertThat(empty.get(ObjcProvider.SDK_DYLIB)).isEmpty();
+  }
+
+  @Test
+  public void onlyPropagatesProvider() {
+    ObjcProvider onlyPropagates = new ObjcProvider.Builder()
+        .add(ObjcProvider.SDK_DYLIB, "foo")
+        .build();
+    assertThat(onlyPropagates.get(ObjcProvider.SDK_DYLIB)).containsExactly("foo");
+  }
+
+  @Test
+  public void onlyNonPropagatesProvider() {
+    ObjcProvider dep = new ObjcProvider.Builder()
+        .add(ObjcProvider.SDK_DYLIB, "foo")
+        .build();
+    ObjcProvider notPropagates = new ObjcProvider.Builder()
+        .addTransitiveWithoutPropagating(ImmutableList.of(dep))
+        .build();
+    assertThat(notPropagates.get(ObjcProvider.SDK_DYLIB)).containsExactly("foo");
+  }
+
+  @Test
+  public void propagatesAndNonPropagatesProvider() {
+    ObjcProvider dep = new ObjcProvider.Builder()
+        .add(ObjcProvider.SDK_DYLIB, "foo")
+        .build();
+    ObjcProvider provider = new ObjcProvider.Builder()
+        .addTransitiveWithoutPropagating(ImmutableList.of(dep))
+        .add(ObjcProvider.SDK_DYLIB, "bar")
+        .build();
+    assertThat(provider.get(ObjcProvider.SDK_DYLIB)).containsExactly("foo", "bar").inOrder();
+  }
+
+  @Test
+  public void doesNotPropagate() {
+    ObjcProvider dep = new ObjcProvider.Builder()
+        .add(ObjcProvider.SDK_DYLIB, "foo")
+        .build();
+    ObjcProvider provider = new ObjcProvider.Builder()
+        .addTransitiveWithoutPropagating(ImmutableList.of(dep))
+        .add(ObjcProvider.SDK_DYLIB, "bar")
+        .build();
+    ObjcProvider depender = new ObjcProvider.Builder()
+        .addTransitiveAndPropagate(provider)
+        .build();
+    assertThat(depender.get(ObjcProvider.SDK_DYLIB)).containsExactly("bar");
+  }
+
+  @Test
+  public void strictDependencyDoesNotPropagateMoreThanOneLevel() {
+    PathFragment strictInclude = PathFragment.create("strict_path");
+    PathFragment propagatedInclude = PathFragment.create("propagated_path");
+
+    ObjcProvider strictDep =
+        new ObjcProvider.Builder()
+            .addForDirectDependents(ObjcProvider.INCLUDE, strictInclude)
+            .build();
+    ObjcProvider propagatedDep =
+        new ObjcProvider.Builder().add(ObjcProvider.INCLUDE, propagatedInclude).build();
+
+    ObjcProvider provider =
+        new ObjcProvider.Builder()
+            .addTransitiveAndPropagate(ImmutableList.of(strictDep, propagatedDep))
+            .build();
+    ObjcProvider depender = new ObjcProvider.Builder().addTransitiveAndPropagate(provider).build();
+
+    assertThat(provider.get(ObjcProvider.INCLUDE))
+        .containsExactly(strictInclude, propagatedInclude);
+    assertThat(depender.get(ObjcProvider.INCLUDE)).containsExactly(propagatedInclude);
+  }
+
+  @Test
+  public void strictDependencyDoesNotPropagateMoreThanOneLevelOnSkylark() {
+    PathFragment strictInclude = PathFragment.create("strict_path");
+    PathFragment propagatedInclude = PathFragment.create("propagated_path");
+
+    ObjcProvider strictDep =
+        new ObjcProvider.Builder()
+            .addForDirectDependents(ObjcProvider.INCLUDE, strictInclude)
+            .build();
+    ObjcProvider propagatedDep =
+        new ObjcProvider.Builder().add(ObjcProvider.INCLUDE, propagatedInclude).build();
+
+    ObjcProvider provider =
+        new ObjcProvider.Builder()
+            .addTransitiveAndPropagate(ImmutableList.of(strictDep, propagatedDep))
+            .build();
+    ObjcProvider depender = new ObjcProvider.Builder().addTransitiveAndPropagate(provider).build();
+
+    assertThat(
+            ((SkylarkNestedSet) provider.getValue(ObjcProvider.INCLUDE.getSkylarkKeyName()))
+                .toCollection())
+        .containsExactly(strictInclude.toString(), propagatedInclude.toString());
+    assertThat(
+            ((SkylarkNestedSet) depender.getValue(ObjcProvider.INCLUDE.getSkylarkKeyName()))
+                .toCollection())
+        .containsExactly(propagatedInclude.toString());
+  }
+
+  @Test
+  public void keysExportedToSkylark() throws Exception {
+    List<Field> keyFields = new ArrayList<>();
+    for (Field field : ObjcProvider.class.getDeclaredFields()) {
+      if (Modifier.isStatic(field.getModifiers()) && field.getType() == ObjcProvider.Key.class) {
+        keyFields.add(field);
+      }
+    }
+    ImmutableSet<Key<?>> allRegisteredKeys = ImmutableSet.<Key<?>>builder()
+        .addAll(ObjcProvider.KEYS_FOR_SKYLARK)
+        .addAll(ObjcProvider.KEYS_NOT_IN_SKYLARK)
+        .build();
+
+    for (Field field : keyFields) {
+      ObjcProvider.Key<?> key = (Key<?>) field.get(null);
+      assertWithMessage("Key %s must either be exposed to skylark or explicitly blacklisted",
+          key.getSkylarkKeyName()).that(allRegisteredKeys).contains(key);
+    }
+  }
+}