make QProcessEnvironment on Windows preserve variable name case

while windows itself does not care which case the variable names are in,
they may be passed to unix tools which *do* care.

note that this uses true case folding for string comparisons while
windows uses uppercasing. this means that "ess" and "eß" will be
considered the same by us, while not by windows. this is not expected to
have real-world impact, particularly because non-ascii variable names
are not used much.

Task-number: QTCREATORBUG-3110
Reviewed-by: thiago
Reviewed-by: dt
(cherry picked from commit f3db5603871928ebed43a085a496397e65952b39)

1 files changed, 7 insertions, 6 deletions

diff --git a/tests/auto/qprocessenvironment/tst_qprocessenvironment.cpp b/tests/auto/qprocessenvironment/tst_qprocessenvironment.cpp
index 1c26343e74..98d48900a5 100644
--- a/tests/auto/qprocessenvironment/tst_qprocessenvironment.cpp
+++ b/tests/auto/qprocessenvironment/tst_qprocessenvironment.cpp
@@ -43,10 +43,6 @@
 #include <QObject>
 #include <QProcessEnvironment>
 
-// Note:
-// in cross-platform tests, ALWAYS use UPPERCASE variable names
-// That's because on Windows, the variables are uppercased
-
 class tst_QProcessEnvironment: public QObject
 {
     Q_OBJECT
@@ -214,7 +210,7 @@ void tst_QProcessEnvironment::caseSensitivity()
     e.insert("foo", "bar");
 
 #ifdef Q_OS_WIN
-    // on Windows, it's uppercased
+    // Windows is case-insensitive, but case-preserving
     QVERIFY(e.contains("foo"));
     QVERIFY(e.contains("FOO"));
     QVERIFY(e.contains("FoO"));
@@ -223,8 +219,12 @@ void tst_QProcessEnvironment::caseSensitivity()
     QCOMPARE(e.value("FOO"), QString("bar"));
     QCOMPARE(e.value("FoO"), QString("bar"));
 
+    // Per Windows, this overwrites the value, but keeps the name's original capitalization
+    e.insert("Foo", "Bar");
+
     QStringList list = e.toStringList();
-    QCOMPARE(list.at(0), QString("FOO=bar"));
+    QCOMPARE(list.length(), 1);
+    QCOMPARE(list.at(0), QString("foo=Bar"));
 #else
     // otherwise, it's case sensitive
     QVERIFY(e.contains("foo"));
@@ -236,6 +236,7 @@ void tst_QProcessEnvironment::caseSensitivity()
     QCOMPARE(e.value("foo"), QString("bar"));
 
     QStringList list = e.toStringList();
+    QCOMPARE(list.length(), 2);
     QVERIFY(list.contains("foo=bar"));
     QVERIFY(list.contains("FOO=baz"));
 #endif