1 files changed, 62 insertions, 0 deletions
diff --git a/src/java_tools/junitrunner/javatests/com/google/testing/junit/runner/junit4/TestModuleShardingFiltersFactory.java b/src/java_tools/junitrunner/javatests/com/google/testing/junit/runner/junit4/TestModuleShardingFiltersFactory.java
new file mode 100644
index 0000000000..144ed5dfe6
--- /dev/null
+++ b/src/java_tools/junitrunner/javatests/com/google/testing/junit/runner/junit4/TestModuleShardingFiltersFactory.java
@@ -0,0 +1,62 @@
+// Copyright 2016 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.testing.junit.runner.junit4;
+
+import com.google.testing.junit.runner.sharding.ShardingEnvironment;
+import com.google.testing.junit.runner.sharding.ShardingFilters;
+import com.google.testing.junit.runner.sharding.api.ShardingFilterFactory;
+import com.google.testing.junit.runner.util.Factory;
+import com.google.testing.junit.runner.util.Supplier;
+
+/**
+ * A factory that supplies a {@link ShardingFilters} for testing purposes.
+ */
+public final class TestModuleShardingFiltersFactory implements Factory<ShardingFilters> {
+  private final JUnit4RunnerTest.TestModule module;
+
+  private final Supplier<ShardingEnvironment> shardingEnvironmentSupplier;
+
+  private final Supplier<ShardingFilterFactory> defaultShardingStrategySupplier;
+
+  public TestModuleShardingFiltersFactory(
+      JUnit4RunnerTest.TestModule module,
+      Supplier<ShardingEnvironment> shardingEnvironmentSupplier,
+      Supplier<ShardingFilterFactory> defaultShardingStrategySupplier) {
+    assert module != null;
+    this.module = module;
+    assert shardingEnvironmentSupplier != null;
+    this.shardingEnvironmentSupplier = shardingEnvironmentSupplier;
+    assert defaultShardingStrategySupplier != null;
+    this.defaultShardingStrategySupplier = defaultShardingStrategySupplier;
+  }
+
+  @Override
+  public ShardingFilters get() {
+    ShardingFilters shardingFilters = module.shardingFilters(
+        shardingEnvironmentSupplier.get(), defaultShardingStrategySupplier.get());
+    if (shardingFilters == null) {
+      throw new NullPointerException();
+    }
+    return shardingFilters;
+  }
+
+  public static Factory<ShardingFilters> create(
+      JUnit4RunnerTest.TestModule module,
+      Supplier<ShardingEnvironment> shardingEnvironmentSupplier,
+      Supplier<ShardingFilterFactory> defaultShardingStrategySupplier) {
+    return new TestModuleShardingFiltersFactory(
+        module, shardingEnvironmentSupplier, defaultShardingStrategySupplier);
+  }
+}
+\ No newline at end of file