1 files changed, 102 insertions, 0 deletions
diff --git a/src/tools/singlejar/desugar_checking_test.cc b/src/tools/singlejar/desugar_checking_test.cc
new file mode 100644
index 0000000000..faa6686178
--- /dev/null
+++ b/src/tools/singlejar/desugar_checking_test.cc
@@ -0,0 +1,102 @@
+// 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.
+
+#include "src/tools/singlejar/desugar_checking.h"
+
+#include "src/tools/singlejar/input_jar.h"
+#include "src/tools/singlejar/zip_headers.h"
+#include "src/tools/singlejar/zlib_interface.h"
+#include "gtest/gtest.h"
+
+// A test fixture is used because friend access to class under test is needed.
+// Tests are instance methods to avoid gUnit dep in .h file.
+class Java8DesugarDepsCheckerTest : public ::testing::Test {
+ protected:
+  static void TestHasDefaultMethods() {
+    Java8DesugarDepsChecker checker([](const std::string &) { return false; },
+                                    /*verbose=*/false);
+    checker.has_default_methods_["a"] = true;
+    checker.extended_interfaces_["c"] = {"b", "a"};
+
+    // Induce cycle (shouldn't happen but make sure we don't crash)
+    checker.extended_interfaces_["d"] = {"e"};
+    checker.extended_interfaces_["e"] = {"d", "a"};
+
+    EXPECT_TRUE(checker.HasDefaultMethods("a"));
+    EXPECT_FALSE(checker.HasDefaultMethods("b"));
+    EXPECT_TRUE(checker.HasDefaultMethods("c"));  // Transitivly through a
+    EXPECT_TRUE(checker.HasDefaultMethods("d"));  // Transitivly through a
+    EXPECT_FALSE(checker.error_);
+  }
+
+  static void TestOutputEntry() {
+    bool checkedA = false;
+    Java8DesugarDepsChecker checker(
+        [&checkedA](const std::string &binary_name) {
+          checkedA = true;
+          return binary_name == "a$$CC.class";
+        },
+        /*verbose=*/false);
+    checker.has_default_methods_["a"] = true;
+    checker.extended_interfaces_["b"] = {"c", "d"};
+    checker.extended_interfaces_["c"] = {"e"};
+    checker.needed_deps_["a$$CC.class"] = "f";
+    checker.missing_interfaces_["b"] = "g";
+    EXPECT_EQ(nullptr, checker.OutputEntry(/*compress=*/true));
+    EXPECT_TRUE(checkedA);
+
+    // Make sure we checked b and its extended interfaces for default methods
+    EXPECT_FALSE(checker.has_default_methods_.at("b"));  // should be cached
+    EXPECT_FALSE(checker.has_default_methods_.at("c"));  // should be cached
+    EXPECT_FALSE(checker.has_default_methods_.at("d"));  // should be cached
+    EXPECT_FALSE(checker.has_default_methods_.at("e"));  // should be cached
+    EXPECT_FALSE(checker.error_);
+  }
+
+  static void TestNeededDepMissing() {
+    Java8DesugarDepsChecker checker([](const std::string &) { return false; },
+                                    /*verbose=*/false,
+                                    /*fail_on_error=*/false);
+    checker.needed_deps_["a$$CC.class"] = "b";
+    EXPECT_EQ(nullptr, checker.OutputEntry(/*compress=*/true));
+    EXPECT_TRUE(checker.error_);
+  }
+
+  static void TestMissedDefaultMethods() {
+    Java8DesugarDepsChecker checker([](const std::string &) { return true; },
+                                    /*verbose=*/false,
+                                    /*fail_on_error=*/false);
+    checker.has_default_methods_["b"] = true;
+    checker.extended_interfaces_["a"] = {"b", "a"};
+    checker.missing_interfaces_["a"] = "g";
+    EXPECT_EQ(nullptr, checker.OutputEntry(/*compress=*/true));
+    EXPECT_TRUE(checker.error_);
+  }
+};
+
+TEST_F(Java8DesugarDepsCheckerTest, HasDefaultMethods) {
+  TestHasDefaultMethods();
+}
+
+TEST_F(Java8DesugarDepsCheckerTest, OutputEntry) {
+  TestOutputEntry();
+}
+
+TEST_F(Java8DesugarDepsCheckerTest, NeededDepMissing) {
+  TestNeededDepMissing();
+}
+
+TEST_F(Java8DesugarDepsCheckerTest, MissingDefaultMethods) {
+  TestMissedDefaultMethods();
+}