TgaImporter: test for opening inexistent files.

src/Plugins/TgaImporter/Test/TgaImporterTest.cpp

@@ -27,6 +27,15 @@ QTEST_APPLESS_MAIN(Magnum::Trade::TgaImporter::Test::TgaImporterTest)
 
 namespace Magnum { namespace Trade { namespace TgaImporter { namespace Test {
 
+void TgaImporterTest::openInexistent() {
+    ostringstream debug;
+    Error::setOutput(&debug);
+
+    TgaImporter importer;
+    QVERIFY(!importer.open("inexistent.file"));
+    QCOMPARE(debug.str().c_str(), "TgaImporter: cannot open file inexistent.file\n");
+}
+
 void TgaImporterTest::paletted() {
     const char data[] = { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
     istringstream in(string(data, sizeof(data)));

src/Plugins/TgaImporter/Test/TgaImporterTest.h

@@ -23,6 +23,7 @@ class TgaImporterTest: public QObject {
     Q_OBJECT
 
     private slots:
+        void openInexistent();
         void paletted();
         void nonRgb();
         void bits16();