Add wildcard-to-regexp support to QRegularExpression

This method will make QRegularExpression on par with QRegExp and
will allow to replace this class when a wildcard expression can be
set through an API (e.g. QSortFilterProxyModel::setFilterWildcard).

For other use cases, see QTBUG-34052.

[ChangeLog][QRegularExpression] Implemented support for wildcard
patterns.
Warning: QRegularExpression might not give the exact same result
as QRegExp as its implementation follows strictly the glob patterns
definition for the wildcard expressions.

Change-Id: I5ed4617ca679159430c3d46da3449f6b3100e366
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

2 files changed, 82 insertions, 0 deletions

diff --git a/tests/auto/corelib/tools/qregularexpression/tst_qregularexpression.cpp b/tests/auto/corelib/tools/qregularexpression/tst_qregularexpression.cpp
index c828551e44..ec495fd272 100644
--- a/tests/auto/corelib/tools/qregularexpression/tst_qregularexpression.cpp
+++ b/tests/auto/corelib/tools/qregularexpression/tst_qregularexpression.cpp
@@ -2066,3 +2066,80 @@ void tst_QRegularExpression::QStringAndQStringRefEquivalence()
         }
     }
 }
+
+void tst_QRegularExpression::wildcard_data()
+{
+    QTest::addColumn<QString>("pattern");
+    QTest::addColumn<QString>("string");
+    QTest::addColumn<int>("foundIndex");
+
+    auto addRow = [](const char *pattern, const char *string, int foundIndex) {
+        QTest::addRow(pattern) << pattern << string << foundIndex;
+    };
+
+    addRow("*.html", "test.html", 0);
+    addRow("*.html", "test.htm", -1);
+    addRow("bar*", "foobarbaz", 3);
+    addRow("*", "Qt Rocks!", 0);
+    addRow(".html", "test.html", 4);
+    addRow(".h", "test.cpp", -1);
+    addRow(".???l", "test.html", 4);
+    addRow("?", "test.html", 0);
+    addRow("?m", "test.html", 6);
+    addRow(".h[a-z]ml", "test.html", 4);
+    addRow(".h[A-Z]ml", "test.html", -1);
+    addRow(".h[A-Z]ml", "test.hTml", 4);
+    addRow(".h[!A-Z]ml", "test.hTml", -1);
+    addRow(".h[!A-Z]ml", "test.html", 4);
+    addRow(".h[!T]ml", "test.hTml", -1);
+    addRow(".h[!T]ml", "test.html", 4);
+    addRow(".h[!T]m[!L]", "test.htmL", -1);
+    addRow(".h[!T]m[!L]", "test.html", 4);
+    addRow(".h[][!]", "test.h]ml", 4);
+    addRow(".h[][!]", "test.h[ml", 4);
+    addRow(".h[][!]", "test.h!ml", 4);
+}
+
+void tst_QRegularExpression::wildcard()
+{
+    QFETCH(QString, pattern);
+    QFETCH(QString, string);
+    QFETCH(int, foundIndex);
+
+    QRegularExpression re;
+    re.setWildcardPattern(pattern);
+    if (forceOptimize)
+        re.optimize();
+
+    QRegularExpressionMatch match = re.match(string);
+
+    QCOMPARE(match.capturedStart(), foundIndex);
+}
+
+void tst_QRegularExpression::testInvalidWildcard_data()
+{
+    QTest::addColumn<QString>("pattern");
+    QTest::addColumn<bool>("isValid");
+
+    QTest::newRow("valid []") << "[abc]" << true;
+    QTest::newRow("valid ending ]") << "abc]" << true;
+    QTest::newRow("invalid [") << "[abc" << false;
+    QTest::newRow("ending [") << "abc[" << false;
+    QTest::newRow("ending [^") << "abc[^" << false;
+    QTest::newRow("ending [\\") << "abc[\\" << false;
+    QTest::newRow("ending []") << "abc[]" << false;
+    QTest::newRow("ending [[") << "abc[[" << false;
+}
+
+void tst_QRegularExpression::testInvalidWildcard()
+{
+    QFETCH(QString, pattern);
+
+    QRegularExpression re;
+    re.setWildcardPattern(pattern);
+    if (forceOptimize)
+        re.optimize();
+
+    QFETCH(bool, isValid);
+    QCOMPARE(re.isValid(), isValid);
+}
diff --git a/tests/auto/corelib/tools/qregularexpression/tst_qregularexpression.h b/tests/auto/corelib/tools/qregularexpression/tst_qregularexpression.h
index 8bb4aa0cce..db5b15be66 100644
--- a/tests/auto/corelib/tools/qregularexpression/tst_qregularexpression.h
+++ b/tests/auto/corelib/tools/qregularexpression/tst_qregularexpression.h
@@ -69,6 +69,11 @@ private slots:
     void JOptionUsage();
     void QStringAndQStringRefEquivalence();
 
+    void wildcard_data();
+    void wildcard();
+    void testInvalidWildcard_data();
+    void testInvalidWildcard();
+
 private:
     void provideRegularExpressions();
 };