Fallback to using the family when doing an exact match

If the difference between the families sizes is just 1 where one of them
is 0 in size then we can fallback to the family in that case.

Pick-to: 5.15
Fixes: QTBUG-87267
Change-Id: I62b25b06c88000b4d7defe91871c07873b1fc792
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/auto/gui/text/qfont/tst_qfont.cpp b/tests/auto/gui/text/qfont/tst_qfont.cpp
index 93fcd71bb6..d651ffe7c7 100644
--- a/tests/auto/gui/text/qfont/tst_qfont.cpp
+++ b/tests/auto/gui/text/qfont/tst_qfont.cpp
@@ -130,6 +130,21 @@ void tst_QFont::exactMatch()
     QVERIFY(!QFont("serif").exactMatch());
     QVERIFY(!QFont("monospace").exactMatch());
 
+    // Confirm that exactMatch is true for a valid font
+    QFontDatabase db;
+    const QString family = db.families().first();
+    const QString style = db.styles(family).first();
+    const int pointSize = db.pointSizes(family, style).first();
+    font = db.font(family, style, pointSize);
+    QVERIFY(font.exactMatch());
+
+    if (db.families().contains("Arial")) {
+        font = QFont("Arial");
+        QVERIFY(font.exactMatch());
+        font = QFont(QString());
+        font.setFamilies({"Arial"});
+        QVERIFY(font.exactMatch());
+    }
 }
 
 void tst_QFont::italicOblique()