Add test for Text::getLineWidth without a font

Author: jjuhl

tests/Text.cpp

@@ -23,6 +23,7 @@
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
 #include "TGUI/Color.hpp"
+#include "TGUI/TextStyle.hpp"
 #include "Tests.hpp"
 
 TEST_CASE("[Text]")
@@ -165,5 +166,13 @@ TEST_CASE("[Text]")
             text3.setFont("resources/DejaVuSans.ttf");
             REQUIRE(text.getSize().y == text3.getSize().y);
         }
+
+        SECTION("Line width without font")
+        {
+            REQUIRE(text.getLineWidth("Foo", nullptr, 0, {}) == 0.0f);
+            REQUIRE(text.getLineWidth("Bar", nullptr, 1, tgui::TextStyle::Underlined) == 0.0f);
+            REQUIRE(text.getLineWidth("Baz", nullptr, 42, {}) == 0.0f);;
+            REQUIRE(text.getLineWidth("FooBar", nullptr, 666, tgui::TextStyle::StrikeThrough) == 0.0f);
+        }
     }
 }