Add EGL initialization unit test.

tests/unittests/BUILD.gn

-# Copyright 2016 The SwiftShader 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.
-
-import("//testing/test.gni")
-
-test("swiftshader_unittests") {
-  deps = [
-    "../../src/OpenGL/libEGL:swiftshader_libEGL",
-    "../../src/OpenGL/libGLESv2:swiftshader_libGLESv2",
-    "//base",
-    "//base/test:test_support",
-    "//testing/gmock",
-    "//testing/gtest",
-  ]
-
-  sources = [
-    "//gpu/swiftshader_tests_main.cc",
-    "unittests.cpp",
-  ]
-}
+# Copyright 2016 The SwiftShader 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.
+
+import("//testing/test.gni")
+
+test("swiftshader_unittests") {
+  deps = [
+    "//third_party/swiftshader/src/OpenGL/libEGL:swiftshader_libEGL",
+    "//third_party/swiftshader/src/OpenGL/libGLESv2:swiftshader_libGLESv2",
+    "//base",
+    "//base/test:test_support",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+
+  sources = [
+    "//gpu/swiftshader_tests_main.cc",
+    "unittests.cpp",
+  ]
+
+  include_dirs = [
+    "../../include",   # Khronos headers
+  ]
+
+  # Make sure we're loading SwiftShader's libraries, not ANGLE's or the system
+  # provided ones. On Windows an explicit LoadLibrary("swiftshader\lib*.dll")
+  # is required before making the first EGL or OpenGL ES call.
+  if (is_win) {
+    ldflags = [
+      "/DELAYLOAD:libEGL.dll",
+      "/DELAYLOAD:libGLESv2.dll",
+    ]
+  } else if (is_mac) {
+    ldflags = [
+      "-Wl,-install_name,@rpath/\$ORIGIN/swiftshader",
+    ]
+  } else {
+    ldflags = [
+      "-Wl,-rpath=\$ORIGIN/swiftshader",
+    ]
+  }
+}

tests/unittests/SubmoduleCheck/gtest/gtest.h

-// These are not the headers you're looking for
-#error "Missing googletest submodule. Run git submodule update --init"
\ No newline at end of file

tests/unittests/unittests.cpp

@@ -13,7 +13,61 @@
 // limitations under the License.
 
 #include "gtest/gtest.h"
+#include "gmock/gmock.h"
 
-TEST(SwiftShaderCompilationOnly, Unit) {
-  // Empty test to trigger compilation of SwiftShader on build bots
+#include <EGL/egl.h>
+#include <GLES2/gl2.h>
+
+#if defined(_WIN32)
+#include <Windows.h>
+#endif
+
+class SwiftShaderTest : public testing::Test
+{
+protected:
+	void SetUp() override
+	{
+		#if defined(_WIN32)
+			// The DLLs are delay loaded (see BUILD.gn), so we can load
+			// the correct ones from the swiftshader subdirectory.
+			HMODULE libEGL = LoadLibraryA("swiftshader\\libEGL.dll");
+			EXPECT_NE(NULL, libEGL);
+
+			HMODULE libGLESv2 = LoadLibraryA("swiftshader\\libGLESv2.dll");
+			EXPECT_NE(NULL, libGLESv2);
+		#endif
+	}
+};
+
+TEST_F(SwiftShaderTest, CompilationOnly)
+{
+	// Empty test to trigger compilation of SwiftShader on build bots
+}
+
+TEST_F(SwiftShaderTest, Initalization)
+{
+	EXPECT_EQ(EGL_SUCCESS, eglGetError());
+
+	EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+	EXPECT_EQ(EGL_SUCCESS, eglGetError());
+	EXPECT_NE(EGL_NO_DISPLAY, display);
+
+	eglQueryString(display, EGL_VENDOR);
+	EXPECT_EQ(EGL_NOT_INITIALIZED, eglGetError());
+
+	EGLint major;
+	EGLint minor;
+	EGLBoolean initialized = eglInitialize(display, &major, &minor);
+	EXPECT_EQ(EGL_SUCCESS, eglGetError());
+	EXPECT_EQ((EGLBoolean)EGL_TRUE, initialized);
+	EXPECT_EQ(1, major);
+	EXPECT_EQ(4, minor);
+
+	const char *vendor = eglQueryString(display, EGL_VENDOR);
+	EXPECT_EQ(EGL_SUCCESS, eglGetError());
+	EXPECT_STREQ("Google Inc.", vendor);
+
+	const char *version = eglQueryString(display, EGL_VERSION);
+	EXPECT_EQ(EGL_SUCCESS, eglGetError());
+	EXPECT_THAT(version, testing::HasSubstr("1.4 SwiftShader "));
 }