Fix turned logic in RemoveOperation

It is regression caused by a0a94576fae26bcbbf3823a6ee4b554886e84925
("Fix RemoveOperation").

Add unit test for all operation types to make sure this code actually
works:-)

Change-Id: I97c94cb3411f05de89422e3fa2222f2217a09e49
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

util/cmake/pro2cmake.py

@@ -239,15 +239,19 @@ class RemoveOperation(Operation):
 
     def process(self, input):
         input_set = set(input)
-        result_set = set(self._value)
+        value_set = set(self._value)
         result = []
-        for v in self._value:
-            if v in input_set:
-                continue
-            if v in result_set:
+
+        # Add everything that is not going to get removed:
+        for v in input:
+            if v not in value_set:
                 result += [v,]
-            else:
+
+        # Add everything else with removal marker:
+        for v in self._value:
+            if v not in input_set:
                 result += ['-{}'.format(v), ]
+
         return result
 
     def __repr__(self):

util/cmake/tests/test_operations.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+#############################################################################
+##
+## Copyright (C) 2018 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of the plugins of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:GPL-EXCEPT$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 3 as published by the Free Software
+## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+from pro2cmake import AddOperation, SetOperation, UniqueAddOperation, RemoveOperation
+
+def test_add_operation():
+    op = AddOperation(['bar', 'buz'])
+
+    result = op.process(['foo', 'bar'])
+    assert ['foo', 'bar', 'bar', 'buz'] == result
+
+
+def test_uniqueadd_operation():
+    op = UniqueAddOperation(['bar', 'buz'])
+
+    result = op.process(['foo', 'bar'])
+    assert ['foo', 'bar', 'buz'] == result
+
+
+def test_set_operation():
+    op = SetOperation(['bar', 'buz'])
+
+    result = op.process(['foo', 'bar'])
+    assert ['bar', 'buz'] == result
+
+
+def test_remove_operation():
+    op = RemoveOperation(['bar', 'buz'])
+
+    result = op.process(['foo', 'bar'])
+    assert ['foo', '-buz'] == result