Fix QDirIterator benchmark to actually find its test data

The benchmark had a hard-coded path on MS and needed an environment
variable set otherwise; neither sounds like a good approach, when
testlib defines a variable that tells us the test's source directory,
a clearly superior way to find things in our source directories.

In the process, replace exit()ing on failure to get a path with a
QSKIP() so that the test at least fails gracefully if it ever can't
find its data. (Using QFAIL() left it with no rows but still trying to
run the test, leading to an assert failure.)

5.15 backport replaces QT_TESTCASE_SOURCEDIR with a search for the
source tree's qdiriterator.pro using QTest::qFindTestData().

Task-number: QTBUG-91713
Change-Id: I1bd5561971239bb838bcf6c24bcdf1d07c81a657
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
(cherry picked from commit 74e9b77f4f3bd823d836a2a1a557b294582bac5e)

1 files changed, 14 insertions, 15 deletions

diff --git a/tests/benchmarks/corelib/io/qdiriterator/main.cpp b/tests/benchmarks/corelib/io/qdiriterator/main.cpp
index eae752d99a..0bbe755f4e 100644
--- a/tests/benchmarks/corelib/io/qdiriterator/main.cpp
+++ b/tests/benchmarks/corelib/io/qdiriterator/main.cpp
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2021 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the test suite of the Qt Toolkit.
@@ -57,24 +57,23 @@ private slots:
     void data();
 };
 
-
 void tst_qdiriterator::data()
 {
-#if defined(Q_OS_WIN)
-    const char *qtdir = "C:\\depot\\qt\\main";
-#else
-    const char *qtdir = ::getenv("QTDIR");
-#endif
-    if (!qtdir) {
-        fprintf(stderr, "QTDIR not set\n");
-        exit(1);
-    }
+    const char hereRelative[] = "tests/benchmarks/corelib/io/qdiriterator/qdiriterator.pro";
+    QString proname = QTest::qFindTestData(QStringLiteral("qdiriterator.pro"));
+    // qDebug("Source pro: %s", proname.toLocal8Bit().constData());
+    // Size chopped counts the '\0', making up for the omitted leading '/':
+    QByteArray dir(QStringRef(&proname).chopped(sizeof(hereRelative)).toLocal8Bit());
+    // qDebug("Root dir: %s", dir.constData());
 
     QTest::addColumn<QByteArray>("dirpath");
-    QByteArray ba = QByteArray(qtdir) + "/src/corelib";
-    QByteArray ba1 = ba + "/io";
-    QTest::newRow(ba) << ba;
-    //QTest::newRow(ba1) << ba1;
+    const QByteArray ba = dir + "/src/corelib";
+
+    if (!QFileInfo(QString::fromLocal8Bit(ba)).isDir())
+        QSKIP("Missing Qt directory");
+
+    QTest::newRow("corelib") << ba;
+    QTest::newRow("corelib/io") << (ba + "/io");
 }
 
 #ifdef Q_OS_WIN