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diff --git a/io_delegate_unittest.cpp b/io_delegate_unittest.cpp
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+++ b/io_delegate_unittest.cpp
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+/*
+ * Copyright (C) 2016, The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include <string>
+
+#include <gtest/gtest.h>
+
+#include "io_delegate.h"
+
+using std::string;
+
+namespace android {
+namespace aidl {
+
+TEST(IoDelegateTest, CannotGetAbsolutePathFromEmptyString) {
+  string absolute_path;
+  EXPECT_FALSE(IoDelegate::GetAbsolutePath("", &absolute_path));
+  EXPECT_TRUE(absolute_path.empty());
+}
+
+TEST(IoDelegateTest, CurrentlyInfersLinuxAbsolutePath) {
+  string absolute_path;
+  EXPECT_TRUE(IoDelegate::GetAbsolutePath("foo", &absolute_path));
+  ASSERT_FALSE(absolute_path.empty());
+  // Should find our desired file at the end of |absolute_path|
+  // But we don't know the prefix, since it's the current working directory
+  EXPECT_TRUE(absolute_path.rfind("/foo") == absolute_path.length() - 4);
+  // Whatever our current working directory, the path is absolute.
+  EXPECT_EQ(absolute_path[0], '/');
+}
+
+}  // namespace android
+}  // namespace aidl