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tst_QStringApiSymmetry: avoid repetition in trimmed_data()

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Enclosing one string in each substring of another does not need to
repeat the empty substring of the latter. Extracting the empty
substring from different positions doesn't get different results.
In the process, tidy up the code a bit.

Change-Id: Ic66febbdadeaac0c466f4f1174d831a991d31e20
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
This commit is contained in:
Edward Welbourne 2022-10-05 13:44:02 +02:00
parent 781bd075a6
commit 5b70546c17
1 changed files with 10 additions and 8 deletions
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14
tests/auto/corelib/text/qstringapisymmetry/tst_qstringapisymmetry.cpp
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@ -2466,18 +2466,20 @@ void tst_QStringApiSymmetry::trimmed_data()
QTest::addColumn<QString>("unicode");
QTest::addColumn<QAnyStringView>("result");
const auto latin1Whitespace = QLatin1String(" \r\n\t\f\v");
const auto latin1Whitespace = QLatin1StringView(" \r\n\t\f\v");
QTest::addRow("null") << QString() << QAnyStringView();
auto add = [latin1Whitespace](const QString &str) {
// run through all substrings of latin1Whitespace
for (int len = 0; len < latin1Whitespace.size(); ++len) {
for (int pos = 0; pos < latin1Whitespace.size() - len; ++pos) {
const QString unicode = latin1Whitespace.mid(pos, len) + str + latin1Whitespace.mid(pos, len);
auto row = [&](QLatin1StringView spaces) {
const QString unicode = spaces + str + spaces;
const QScopedArrayPointer<const char> escaped(QTest::toString(unicode));
QTest::addRow("%s", escaped.data()) << unicode << QAnyStringView(str);
}
};
row({}); // The len = 0 case of the following.
for (qsizetype len = 1; len < latin1Whitespace.size(); ++len) {
for (qsizetype pos = 0; pos < latin1Whitespace.size() - len; ++pos)
row (latin1Whitespace.mid(pos, len));
}
};