1 files changed, 200 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/skyframe/PlatformLookupUtilTest.java b/src/test/java/com/google/devtools/build/lib/skyframe/PlatformLookupUtilTest.java
new file mode 100644
index 0000000000..cf3c5908a3
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+++ b/src/test/java/com/google/devtools/build/lib/skyframe/PlatformLookupUtilTest.java
@@ -0,0 +1,200 @@
+// Copyright 2018 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.skyframe;
+
+import static com.google.common.truth.Truth.assertThat;
+import static com.google.devtools.build.skyframe.EvaluationResultSubjectFactory.assertThatEvaluationResult;
+
+import com.google.auto.value.AutoValue;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.devtools.build.lib.analysis.BlazeDirectories;
+import com.google.devtools.build.lib.analysis.platform.PlatformInfo;
+import com.google.devtools.build.lib.analysis.util.AnalysisMock;
+import com.google.devtools.build.lib.rules.platform.ToolchainTestCase;
+import com.google.devtools.build.lib.skyframe.PlatformLookupUtil.InvalidPlatformException;
+import com.google.devtools.build.lib.skyframe.util.SkyframeExecutorTestUtils;
+import com.google.devtools.build.skyframe.EvaluationResult;
+import com.google.devtools.build.skyframe.SkyFunction;
+import com.google.devtools.build.skyframe.SkyFunctionException;
+import com.google.devtools.build.skyframe.SkyFunctionName;
+import com.google.devtools.build.skyframe.SkyKey;
+import com.google.devtools.build.skyframe.SkyValue;
+import java.util.Map;
+import javax.annotation.Nullable;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Tests for {@link PlatformLookupUtil}. */
+@RunWith(JUnit4.class)
+public class PlatformLookupUtilTest extends ToolchainTestCase {
+
+  /**
+   * An {@link AnalysisMock} that injects {@link GetPlatformInfoFunction} into the Skyframe
+   * executor.
+   */
+  private static final class AnalysisMockWithGetPlatformInfoFunction extends AnalysisMock.Delegate {
+    AnalysisMockWithGetPlatformInfoFunction() {
+      super(AnalysisMock.get());
+    }
+
+    @Override
+    public ImmutableMap<SkyFunctionName, SkyFunction> getSkyFunctions(
+        BlazeDirectories directories) {
+      return ImmutableMap.<SkyFunctionName, SkyFunction>builder()
+          .putAll(super.getSkyFunctions(directories))
+          .put(GET_PLATFORM_INFO_FUNCTION, new GetPlatformInfoFunction())
+          .build();
+    }
+  }
+
+  @Override
+  protected AnalysisMock getAnalysisMock() {
+    return new AnalysisMockWithGetPlatformInfoFunction();
+  }
+
+  @Test
+  public void testPlatformLookup() throws Exception {
+    ConfiguredTargetKey linuxKey =
+        ConfiguredTargetKey.of(makeLabel("//platforms:linux"), targetConfigKey, false);
+    ConfiguredTargetKey macKey =
+        ConfiguredTargetKey.of(makeLabel("//platforms:mac"), targetConfigKey, false);
+    GetPlatformInfoKey key = GetPlatformInfoKey.create(ImmutableList.of(linuxKey, macKey));
+
+    EvaluationResult<GetPlatformInfoValue> result = getPlatformInfo(key);
+
+    assertThatEvaluationResult(result).hasNoError();
+    assertThatEvaluationResult(result).hasEntryThat(key).isNotNull();
+
+    Map<ConfiguredTargetKey, PlatformInfo> platforms = result.get(key).platforms();
+    assertThat(platforms).containsEntry(linuxKey, linuxPlatform);
+    assertThat(platforms).containsEntry(macKey, macPlatform);
+    assertThat(platforms).hasSize(2);
+  }
+
+  @Test
+  public void testPlatformLookup_targetNotPlatform() throws Exception {
+    scratch.file("invalid/BUILD", "filegroup(name = 'not_a_platform')");
+
+    ConfiguredTargetKey targetKey =
+        ConfiguredTargetKey.of(makeLabel("//invalid:not_a_platform"), targetConfigKey, false);
+    GetPlatformInfoKey key = GetPlatformInfoKey.create(ImmutableList.of(targetKey));
+
+    EvaluationResult<GetPlatformInfoValue> result = getPlatformInfo(key);
+
+    assertThatEvaluationResult(result).hasError();
+    assertThatEvaluationResult(result)
+        .hasErrorEntryForKeyThat(key)
+        .hasExceptionThat()
+        .isInstanceOf(InvalidPlatformException.class);
+    assertThatEvaluationResult(result)
+        .hasErrorEntryForKeyThat(key)
+        .hasExceptionThat()
+        .hasMessageThat()
+        .contains("//invalid:not_a_platform");
+  }
+
+  @Test
+  public void testPlatformLookup_targetDoesNotExist() throws Exception {
+    ConfiguredTargetKey targetKey =
+        ConfiguredTargetKey.of(makeLabel("//fake:missing"), targetConfigKey, false);
+    GetPlatformInfoKey key = GetPlatformInfoKey.create(ImmutableList.of(targetKey));
+
+    EvaluationResult<GetPlatformInfoValue> result = getPlatformInfo(key);
+
+    assertThatEvaluationResult(result).hasError();
+    assertThatEvaluationResult(result)
+        .hasErrorEntryForKeyThat(key)
+        .hasExceptionThat()
+        .isInstanceOf(InvalidPlatformException.class);
+    assertThatEvaluationResult(result)
+        .hasErrorEntryForKeyThat(key)
+        .hasExceptionThat()
+        .hasMessageThat()
+        .contains("no such package 'fake': BUILD file not found on package path");
+  }
+
+  // Calls PlatformLookupUtil.getPlatformInfo.
+  private static final SkyFunctionName GET_PLATFORM_INFO_FUNCTION =
+      SkyFunctionName.createHermetic("GET_PLATFORM_INFO_FUNCTION");
+
+  @AutoValue
+  abstract static class GetPlatformInfoKey implements SkyKey {
+    @Override
+    public SkyFunctionName functionName() {
+      return GET_PLATFORM_INFO_FUNCTION;
+    }
+
+    abstract Iterable<ConfiguredTargetKey> platformKeys();
+
+    public static GetPlatformInfoKey create(Iterable<ConfiguredTargetKey> platformKeys) {
+      return new AutoValue_PlatformLookupUtilTest_GetPlatformInfoKey(platformKeys);
+    }
+  }
+
+  EvaluationResult<GetPlatformInfoValue> getPlatformInfo(GetPlatformInfoKey key)
+      throws InterruptedException {
+    try {
+      // Must re-enable analysis for Skyframe functions that create configured targets.
+      skyframeExecutor.getSkyframeBuildView().enableAnalysis(true);
+      return SkyframeExecutorTestUtils.evaluate(
+          skyframeExecutor, key, /*keepGoing=*/ false, reporter);
+    } finally {
+      skyframeExecutor.getSkyframeBuildView().enableAnalysis(false);
+    }
+  }
+
+  @AutoValue
+  abstract static class GetPlatformInfoValue implements SkyValue {
+    abstract Map<ConfiguredTargetKey, PlatformInfo> platforms();
+
+    static GetPlatformInfoValue create(Map<ConfiguredTargetKey, PlatformInfo> platforms) {
+      return new AutoValue_PlatformLookupUtilTest_GetPlatformInfoValue(platforms);
+    }
+  }
+
+  private static final class GetPlatformInfoFunction implements SkyFunction {
+
+    @Nullable
+    @Override
+    public SkyValue compute(SkyKey skyKey, Environment env)
+        throws SkyFunctionException, InterruptedException {
+      GetPlatformInfoKey key = (GetPlatformInfoKey) skyKey;
+      try {
+        Map<ConfiguredTargetKey, PlatformInfo> platforms =
+            PlatformLookupUtil.getPlatformInfo(key.platformKeys(), env);
+        if (env.valuesMissing()) {
+          return null;
+        }
+        return GetPlatformInfoValue.create(platforms);
+      } catch (InvalidPlatformException e) {
+        throw new GetPlatformInfoFunctionException(e);
+      }
+    }
+
+    @Nullable
+    @Override
+    public String extractTag(SkyKey skyKey) {
+      return null;
+    }
+  }
+
+  private static class GetPlatformInfoFunctionException extends SkyFunctionException {
+    public GetPlatformInfoFunctionException(InvalidPlatformException e) {
+      super(e, Transience.PERSISTENT);
+    }
+  }
+}