C++: Add basic LocalSymbols test

Change-Id: I199e912203f329ec9b8bed2eb105e4a56f729e7d
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/plugins/cpptools/cpplocalsymbols_test.cpp

@@ -0,0 +1,186 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** 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 "cpptoolsplugin.h"
+
+#include "cpplocalsymbols.h"
+#include "cppsemanticinfo.h"
+
+#include <cplusplus/Overview.h>
+#include <utils/algorithm.h>
+
+#include <QtTest>
+
+namespace {
+
+class FindFirstFunctionDefinition: protected CPlusPlus::ASTVisitor
+{
+public:
+    FindFirstFunctionDefinition(CPlusPlus::TranslationUnit *translationUnit)
+        : ASTVisitor(translationUnit)
+        , m_definition(0)
+    {}
+
+    CPlusPlus::FunctionDefinitionAST *operator()()
+    {
+        accept(translationUnit()->ast());
+        return m_definition;
+    }
+
+private:
+    bool preVisit(CPlusPlus::AST *ast)
+    {
+        if (CPlusPlus::FunctionDefinitionAST *f = ast->asFunctionDefinition()) {
+            m_definition = f;
+            return false;
+        }
+        return true;
+    }
+
+private:
+    CPlusPlus::FunctionDefinitionAST *m_definition;
+};
+
+struct Result
+{
+    Result() : line(0), column(0), length(0) {}
+    Result(const QByteArray &name, unsigned line, unsigned column, unsigned length)
+        : name(name), line(line), column(column), length(length)
+    {}
+
+    QByteArray name;
+    unsigned line;
+    unsigned column;
+    unsigned length;
+
+    bool operator==(const Result &other) const
+    {
+        return name == other.name
+                && line == other.line
+                && column == other.column
+                && length == other.length;
+    }
+
+    static Result fromHighlightingResult(const CPlusPlus::Symbol *symbol,
+                                         TextEditor::HighlightingResult result)
+    {
+        const QByteArray name = CPlusPlus::Overview().prettyName(symbol->name()).toLatin1();
+        return Result(name, result.line, result.column, result.length);
+    }
+
+    static QList<Result> fromLocalUses(CppTools::SemanticInfo::LocalUseMap localUses)
+    {
+        QList<Result> result;
+
+        CppTools::SemanticInfo::LocalUseIterator it(localUses);
+        while (it.hasNext()) {
+            it.next();
+            const CPlusPlus::Symbol *symbol = it.key();
+            const QList<CppTools::SemanticInfo::Use> &uses = it.value();
+            foreach (const CppTools::SemanticInfo::Use &use, uses)
+                result << fromHighlightingResult(symbol, use);
+        }
+
+        Utils::sort(result, [](const Result &r1, const Result &r2) {
+            if (r1.line == r2.line)
+                return r1.column < r2.column;
+            return r1.line < r2.line;
+        });
+        return result;
+    }
+};
+
+} // anonymous namespace
+
+Q_DECLARE_METATYPE(Result)
+Q_DECLARE_METATYPE(QList<Result>)
+
+namespace QTest {
+    template<>
+    char *toString(const Result &result)
+    {
+        QByteArray ba = "Result(";
+        ba += "_(\"" + result.name + "\"), ";
+        ba += QByteArray::number(result.line) + ", ";
+        ba += QByteArray::number(result.column) + ", ";
+        ba += QByteArray::number(result.length) + ")";
+        return qstrdup(ba.data());
+    }
+}
+
+namespace CppTools {
+namespace Internal {
+
+void CppToolsPlugin::test_cpplocalsymbols_data()
+{
+    QTest::addColumn<QByteArray>("source");
+    QTest::addColumn<QList<Result>>("expectedUses");
+
+    typedef QByteArray _;
+
+    QTest::newRow("basic")
+        << _("int f(int arg)\n"
+             "{\n"
+             "    int local;\n"
+             "    g(&local);\n"
+             "    return local + arg;\n"
+             "}\n")
+        << (QList<Result>()
+            << Result(_("arg"), 0, 10, 3)
+            << Result(_("local"), 2, 9, 5)
+            << Result(_("local"), 3, 8, 5)
+            << Result(_("local"), 4, 12, 5)
+            << Result(_("arg"), 4, 20, 3));
+}
+
+void CppToolsPlugin::test_cpplocalsymbols()
+{
+    QFETCH(QByteArray, source);
+    QFETCH(QList<Result>, expectedUses);
+
+    CPlusPlus::Document::Ptr document = CPlusPlus::Document::create(QLatin1String("test.cpp"));
+    document->setUtf8Source(source);
+    document->check();
+    QVERIFY(document->diagnosticMessages().isEmpty());
+    QVERIFY(document->translationUnit());
+    QVERIFY(document->translationUnit()->ast());
+    QVERIFY(document->globalNamespace());
+    FindFirstFunctionDefinition find(document->translationUnit());
+    CPlusPlus::DeclarationAST *functionDefinition = find();
+
+    LocalSymbols localSymbols(document, functionDefinition);
+
+    const QList<Result> actualUses = Result::fromLocalUses(localSymbols.uses);
+//    foreach (const Result &result, actualUses)
+//        qDebug() << QTest::toString(result);
+    QCOMPARE(actualUses, expectedUses);
+}
+
+} // namespace Internal
+} // namespace CppTools