Tests for readFileAsString()

test/CMakeLists.txt

@@ -33,6 +33,7 @@ detect_stray_source_files("${contracts_sources}" "contracts/")
 set(libsolutil_sources
     libsolutil/Checksum.cpp
     libsolutil/CommonData.cpp
+    libsolutil/CommonIO.cpp
     libsolutil/FixedHash.cpp
     libsolutil/IndentedWriter.cpp
     libsolutil/IpfsHash.cpp

test/libsolutil/CommonData.cpp

@@ -16,7 +16,7 @@
 */
 // SPDX-License-Identifier: GPL-3.0
 /**
- * Unit tests for the StringUtils routines.
+ * Unit tests for the CommonData routines.
  */
 
 #include <libsolutil/Common.h>

test/libsolutil/CommonIO.cpp

@@ -0,0 +1,69 @@
+/*
+	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/>.
+*/
+// SPDX-License-Identifier: GPL-3.0
+
+/// Unit tests for the CommonIO routines.
+
+#include <libsolutil/CommonIO.h>
+
+#include <test/Common.h>
+#include <test/FilesystemUtils.h>
+#include <test/TemporaryDirectory.h>
+#include <test/libsolidity/util/SoltestErrors.h>
+
+#include <boost/test/unit_test.hpp>
+#include <boost/filesystem.hpp>
+
+#include <fstream>
+#include <string>
+
+using namespace std;
+using namespace solidity::test;
+
+namespace solidity::util::test
+{
+
+BOOST_AUTO_TEST_SUITE(CommonIOTest)
+
+BOOST_AUTO_TEST_CASE(readFileAsString_regular_file)
+{
+	TemporaryDirectory tempDir("common-io-test-");
+	createFileWithContent(tempDir.path() / "test.txt", "ABC\ndef\n");
+
+	BOOST_TEST(readFileAsString((tempDir.path() / "test.txt").string()) == "ABC\ndef\n");
+}
+
+BOOST_AUTO_TEST_CASE(readFileAsString_directory)
+{
+	TemporaryDirectory tempDir("common-io-test-");
+	BOOST_CHECK_THROW(readFileAsString(tempDir.path().string()), NotAFile);
+}
+
+BOOST_AUTO_TEST_CASE(readFileAsString_symlink)
+{
+	TemporaryDirectory tempDir("common-io-test-");
+	createFileWithContent(tempDir.path() / "test.txt", "ABC\ndef\n");
+
+	if (!createSymlinkIfSupportedByFilesystem("test.txt", tempDir.path() / "symlink.txt"))
+		return;
+
+	BOOST_TEST(readFileAsString((tempDir.path() / "symlink.txt").string()) == "ABC\ndef\n");
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} // namespace solidity::util::test