Add QLatin1String::count(needle)

[ChangeLog][QtCore][QLatin1String] Added QLatin1String::count(needle).

Task-number: QTBUG-98433
Change-Id: I31c9fdf14fd81500722ff9f5998eadf0e6cedc5c
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

2 files changed, 44 insertions, 0 deletions

diff --git a/tests/auto/corelib/text/qlatin1string/tst_qlatin1string.cpp b/tests/auto/corelib/text/qlatin1string/tst_qlatin1string.cpp
index c1ca1f74c0..aebd60ded2 100644
--- a/tests/auto/corelib/text/qlatin1string/tst_qlatin1string.cpp
+++ b/tests/auto/corelib/text/qlatin1string/tst_qlatin1string.cpp
@@ -55,6 +55,7 @@ private Q_SLOTS:
     void iterators();
     void relationalOperators_data();
     void relationalOperators();
+    void count();
 };
 
 void tst_QLatin1String::constExpr()
@@ -398,6 +399,36 @@ void tst_QLatin1String::relationalOperators()
 #undef CHECK
 }
 
+void tst_QLatin1String::count()
+{
+    QLatin1String a("ABCDEFGHIEfGEFG");
+    QCOMPARE(a.size(), 15);
+    QCOMPARE(a.count('A'), 1);
+    QCOMPARE(a.count('Z'), 0);
+    QCOMPARE(a.count('E'), 3);
+    QCOMPARE(a.count('F'), 2);
+    QCOMPARE(a.count('F', Qt::CaseInsensitive), 3);
+    QCOMPARE(a.count(QLatin1String("FG")), 2);
+    QCOMPARE(a.count(QLatin1String("FG"), Qt::CaseInsensitive), 3);
+    QCOMPARE(a.count(QLatin1String(), Qt::CaseInsensitive), 16);
+    QCOMPARE(a.count(QLatin1String(""), Qt::CaseInsensitive), 16);
+
+    QLatin1String nullStr;
+    QCOMPARE(nullStr.count('A'), 0);
+    QCOMPARE(nullStr.count(QLatin1String("AB")), 0);
+    QCOMPARE(nullStr.count(QLatin1String()), 1);
+    QCOMPARE(nullStr.count(QLatin1String("")), 1);
+
+    QLatin1String emptyStr("");
+    QCOMPARE(emptyStr.count('A'), 0);
+    QCOMPARE(emptyStr.count(QLatin1String("AB")), 0);
+    QCOMPARE(emptyStr.count(QLatin1String()), 1);
+    QCOMPARE(emptyStr.count(QLatin1String("")), 1);
+
+    using namespace Qt::Literals::StringLiterals;
+    QCOMPARE("a\0b"_L1.count(QChar::SpecialCharacter::LineSeparator), 0);
+}
+
 QTEST_APPLESS_MAIN(tst_QLatin1String)
 
 #include "tst_qlatin1string.moc"
diff --git a/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp b/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
index 56bb74d3c7..32d5e014bd 100644
--- a/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
+++ b/tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
@@ -748,6 +748,19 @@ private Q_SLOTS:
     void count_QStringView_char16_t_data() { count_data(); }
     void count_QStringView_char16_t() { count_impl<QStringView, char16_t>(); }
 
+    void count_QLatin1String_QString_data() { count_data(); }
+    void count_QLatin1String_QString() { count_impl<QLatin1String, QString>(); }
+    void count_QLatin1String_QLatin1String_data() { count_data(); }
+    void count_QLatin1String_QLatin1String() { count_impl<QLatin1String, QLatin1String>(); }
+    void count_QLatin1String_QStringView_data() { count_data(); }
+    void count_QLatin1String_QStringView() { count_impl<QLatin1String, QStringView>(); }
+    void count_QLatin1String_QChar_data() { count_data(); }
+    void count_QLatin1String_QChar() { count_impl<QLatin1String, QChar>(); }
+    void count_QLatin1String_char16_t_data() { count_data(); }
+    void count_QLatin1String_char16_t() { count_impl<QLatin1String, char16_t>(); }
+    void count_QLatin1String_QLatin1Char_data() { count_data(); }
+    void count_QLatin1String_QLatin1Char() { count_impl<QLatin1String, QLatin1Char>(); }
+
     //
     // UTF-16-only checks:
     //