Run link tests in the GTest framework.
diff --git a/gtests/Link.FromFile.cpp b/gtests/Link.FromFile.cpp
new file mode 100644
index 0000000..6db43d9
--- /dev/null
+++ b/gtests/Link.FromFile.cpp
@@ -0,0 +1,107 @@
+//
+// Copyright (C) 2016 Google, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+// Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//
+// Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+//
+// Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+#include <memory>
+
+#include <gtest/gtest.h>
+
+#include "TestFixture.h"
+
+namespace glslangtest {
+namespace {
+
+using LinkTest = GlslangTest<
+ ::testing::TestWithParam<std::vector<std::string>>>;
+
+TEST_P(LinkTest, FromFile)
+{
+ const auto& fileNames = GetParam();
+ const size_t fileCount = fileNames.size();
+ const EShMessages controls = DeriveOptions(
+ Source::GLSL, Semantics::OpenGL, Target::AST);
+ GlslangResult result;
+
+ // Compile each input shader file.
+ std::vector<std::unique_ptr<glslang::TShader>> shaders;
+ for (size_t i = 0; i < fileCount; ++i) {
+ std::string contents;
+ tryLoadFile(GLSLANG_TEST_DIRECTORY "/" + fileNames[i],
+ "input", &contents);
+ shaders.emplace_back(
+ new glslang::TShader(GetShaderStage(GetSuffix(fileNames[i]))));
+ auto* shader = shaders.back().get();
+ compile(shader, contents, "", controls);
+ result.shaderResults.push_back(
+ {fileNames[i], shader->getInfoLog(), shader->getInfoDebugLog()});
+ }
+
+ // Link all of them.
+ glslang::TProgram program;
+ for (const auto& shader : shaders) program.addShader(shader.get());
+ program.link(controls);
+ result.linkingOutput = program.getInfoLog();
+ result.linkingError = program.getInfoDebugLog();
+
+ std::ostringstream stream;
+ outputResultToStream(&stream, result, controls);
+
+ // Check with expected results.
+ const std::string expectedOutputFname =
+ GLSLANG_TEST_DIRECTORY "/baseResults/" + fileNames.front() + ".out";
+ std::string expectedOutput;
+ tryLoadFile(expectedOutputFname, "expected output", &expectedOutput);
+
+ checkEqAndUpdateIfRequested(expectedOutput, stream.str(), expectedOutputFname);
+}
+
+// clang-format off
+INSTANTIATE_TEST_CASE_P(
+ Glsl, LinkTest,
+ ::testing::ValuesIn(std::vector<std::vector<std::string>>({
+ {"mains1.frag", "mains2.frag", "noMain1.geom", "noMain2.geom"},
+ {"noMain.vert", "mains.frag"},
+ {"link1.frag", "link2.frag", "link3.frag"},
+ {"recurse1.vert", "recurse1.frag", "recurse2.frag"},
+ {"300link.frag"},
+ {"300link2.frag"},
+ {"300link3.frag"},
+ {"empty.frag", "empty2.frag", "empty3.frag"},
+ {"150.tesc", "150.tese", "400.tesc", "400.tese", "410.tesc", "420.tesc", "420.tese"},
+ {"max_vertices_0.geom"},
+ })),
+);
+// clang-format on
+
+} // anonymous namespace
+} // namespace glslangtest