new file mode 100644

@@ -0,0 +1,51 @@

+#include <cerrno>

+#include <cstring>

+#include <fstream>

+#include <stdexcept>

+#include <string>

+

+#include <GL/glew.h>

+

+#include <glbackend.hpp>

+#include <gltest.hpp>

+

+

+// Function that throws with a system-supplied message.

+void file_open(std::string const & filename)

+{

+    auto file = std::ifstream{"nonexistent"};

+    if (!file)

+        throw std::runtime_error(std::string{} +

+            "Could not open file '" + filename + "':\n" +

+            std::strerror(errno) + "." // NOLINT

+        );

+}

+

+

+GLTEST(gltest, 640, 480, 2, 0)

+{

+    backend.prefix("assets/tests");

+

+    GLTEST_EXPECT_VALUE(

+        GL_FALSE,

+        glIsEnabled(GL_DEPTH_TEST)

+    )

+    GLTEST_EXPECT_EXCEPTION(false,

+        "Expected exception",

+        throw std::runtime_error("Expected exception")

+    )

+    GLTEST_EXPECT_EXCEPTION(true,

+        "Could not open file 'nonexistent':\n",

+        // "No such file or directory"

+        file_open("nonexistent")

+    )

+

+    constexpr auto size = 0.5;

+    glBegin(GL_TRIANGLE_STRIP);

+    glVertex3f(-size, -size, 0);

+    glVertex3f(-size, +size, 0);

+    glVertex3f(+size, -size, 0);

+    glVertex3f(+size, +size, 0);

+    glEnd();

+    backend.tga_compare("GLTest.tga");

+}