Build a shared library.

We don't want our code to be duplicated in memory for each application
that uses it, so the library should not be linked statically.
Some ramifications worth mentioning:
    - The unit tests had to be moved into the library,
      because otherwise we would need to export random
      internal symbols. This is why the patch appears so big.
      A follow-up patch should probably make compilation
      of tests optional, so the library can be deployed without
      unneeded code.
    - The DESTDIR of the auto test executables is now the
      same as the one of all other executables, so they
      can all use the dll on Windows without additional
      setup.
    - Some internal symbols were exported, namely:
          a) Logging-related stuff. This allows us to use
             a uniform logging approach in the library and in
             our command-line tools; I consider this acceptable.
          b) A handful of classes and functions currently needed
             by certain command-line tools. These seem more questionable
             to me and we should probably find a different way to implement
             the respective functionality.

Change-Id: I9cd21e12cd622b55cf62f5e04ad398734410ede1
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/src/lib/buildgraph/tst_buildgraph.cpp b/src/lib/buildgraph/tst_buildgraph.cpp
new file mode 100644
index 000000000..3c9c208ff
--- /dev/null
+++ b/src/lib/buildgraph/tst_buildgraph.cpp
@@ -0,0 +1,113 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Build Suite.
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+#include "tst_buildgraph.h"
+
+#include <buildgraph/artifact.h>
+#include <buildgraph/buildproduct.h>
+#include <buildgraph/cycledetector.h>
+#include <language/language.h>
+#include <logging/logger.h>
+#include <tools/error.h>
+
+#include <QtTest>
+
+namespace qbs {
+namespace Internal {
+
+TestBuildGraph::TestBuildGraph(ILogSink *logSink) : m_logSink(logSink)
+{
+}
+
+void TestBuildGraph::initTestCase()
+{
+}
+
+void TestBuildGraph::cleanupTestCase()
+{
+    qDeleteAll(m_artifacts);
+}
+
+
+bool TestBuildGraph::cycleDetected(const BuildProductConstPtr &product)
+{
+    try {
+        CycleDetector(Logger(m_logSink)).visitProduct(product);
+        return false;
+    } catch (const Error &) {
+        return true;
+    }
+}
+
+BuildProductConstPtr TestBuildGraph::productWithDirectCycle()
+{
+    Artifact * const root = new Artifact;
+    Artifact * const child = new Artifact;
+    m_artifacts << root << child;
+    root->children.insert(child);
+    child->children.insert(root);
+    const BuildProductPtr product = BuildProduct::create();
+    product->targetArtifacts.insert(root);
+    return product;
+}
+
+BuildProductConstPtr TestBuildGraph::productWithLessDirectCycle()
+{
+    Artifact * const root = new Artifact;
+    Artifact * const child = new Artifact;
+    Artifact * const grandchild = new Artifact;
+    m_artifacts << root << child << grandchild;
+    root->children.insert(child);
+    child->children.insert(grandchild);
+    grandchild->children.insert(root);
+    const BuildProductPtr product = BuildProduct::create();
+    product->targetArtifacts << root;
+    return product;
+}
+
+// root appears as a child, but in a different tree
+BuildProductConstPtr TestBuildGraph::productWithNoCycle()
+{
+    Artifact * const root = new Artifact;
+    Artifact * const root2 = new Artifact;
+    m_artifacts << root << root2;
+    root2->children.insert(root);
+    const BuildProductPtr product = BuildProduct::create();
+    product->targetArtifacts << root << root2;
+    return product;
+}
+
+void TestBuildGraph::testCycle()
+{
+    QVERIFY(cycleDetected(productWithDirectCycle()));
+    QVERIFY(cycleDetected(productWithLessDirectCycle()));
+    QVERIFY(!cycleDetected(productWithNoCycle()));
+}
+
+} // namespace Internal
+} // namespace qbs