GL: add unit test for Platform::GLContext{NoCreate, ...}

src/Magnum/GL/Test/ContextGLTest.cpp

@@ -29,11 +29,15 @@
 #include "Magnum/GL/Extensions.h"
 #include "Magnum/GL/OpenGLTester.h"
 
+#include "Magnum/Platform/GLContext.h"
+
 namespace Magnum { namespace GL { namespace Test { namespace {
 
 struct ContextGLTest: OpenGLTester {
     explicit ContextGLTest();
 
+    void constructNoCreate();
+
     void isVersionSupported();
     #ifndef MAGNUM_TARGET_GLES
     void isVersionSupportedES();
@@ -44,7 +48,8 @@ struct ContextGLTest: OpenGLTester {
 };
 
 ContextGLTest::ContextGLTest() {
-    addTests({&ContextGLTest::isVersionSupported,
+    addTests({&ContextGLTest::constructNoCreate,
+              &ContextGLTest::isVersionSupported,
               #ifndef MAGNUM_TARGET_GLES
               &ContextGLTest::isVersionSupportedES,
               #endif
@@ -53,6 +58,16 @@ ContextGLTest::ContextGLTest() {
               &ContextGLTest::isExtensionDisabled});
 }
 
+void ContextGLTest::constructNoCreate() {
+    {
+        char dummyArgv[] = "dummy";
+        char* argv[] = {dummyArgv};
+        Platform::GLContext context{NoCreate, 1, argv};
+    }
+
+    CORRADE_VERIFY(true);
+}
+
 void ContextGLTest::isVersionSupported() {
     const Version v = Context::current().version();
     CORRADE_VERIFY(Context::current().isVersionSupported(v));