1 files changed, 63 insertions, 0 deletions
diff --git a/test/libsolidity/Metadata.cpp b/test/libsolidity/Metadata.cpp
new file mode 100644
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--- /dev/null
+++ b/test/libsolidity/Metadata.cpp
@@ -0,0 +1,63 @@
+/*
+	This file is part of solidity.
+
+	solidity is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	solidity is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with solidity.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/**
+ * @date 2017
+ * Unit tests for the metadata output.
+ */
+
+#include "../Metadata.h"
+#include "../TestHelper.h"
+#include <libsolidity/interface/CompilerStack.h>
+#include <libdevcore/SwarmHash.h>
+
+namespace dev
+{
+namespace solidity
+{
+namespace test
+{
+
+BOOST_AUTO_TEST_SUITE(Metadata)
+
+BOOST_AUTO_TEST_CASE(metadata_stamp)
+{
+	// Check that the metadata stamp is at the end of the runtime bytecode.
+	char const* sourceCode = R"(
+		pragma solidity >=0.0;
+		contract test {
+			function g(function(uint) external returns (uint) x) {}
+		}
+	)";
+	CompilerStack compilerStack;
+	BOOST_REQUIRE(compilerStack.compile(std::string(sourceCode)));
+	bytes const& bytecode = compilerStack.runtimeObject("test").bytecode;
+	std::string const& metadata = compilerStack.onChainMetadata("test");
+	BOOST_CHECK(dev::test::isValidMetadata(metadata));
+	bytes hash = dev::swarmHash(metadata).asBytes();
+	BOOST_REQUIRE(hash.size() == 32);
+	BOOST_REQUIRE(bytecode.size() >= 2);
+	size_t metadataCBORSize = (size_t(bytecode.end()[-2]) << 8) + size_t(bytecode.end()[-1]);
+	BOOST_REQUIRE(metadataCBORSize < bytecode.size() - 2);
+	bytes expectation = bytes{0xa1, 0x65, 'b', 'z', 'z', 'r', '0', 0x58, 0x20} + hash;
+	BOOST_CHECK(std::equal(expectation.begin(), expectation.end(), bytecode.end() - metadataCBORSize - 2));
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+}
+}
+}