Initial testing of the preprocessor.

tests/auto/cplusplus/preprocessor/tst_preprocessor.cpp

@@ -0,0 +1,28 @@
+#include <QtTest>
+#include <pp.h>
+
+CPLUSPLUS_USE_NAMESPACE
+
+class tst_Preprocessor: public QObject
+{
+Q_OBJECT
+
+private Q_SLOTS:
+    void pp_with_no_client();
+};
+
+void tst_Preprocessor::pp_with_no_client()
+{
+    using namespace CPlusPlus;
+
+    Client *client = 0; // no client.
+    Environment env;
+
+    Preprocessor preprocess(client, env);
+    QByteArray preprocessed = preprocess("#define foo(a,b) a + b\nfoo(1, 2)\n");
+    QByteArray expected = "1 + 2";
+    QCOMPARE(preprocessed.trimmed(), expected);
+}
+
+QTEST_APPLESS_MAIN(tst_Preprocessor)
+#include "tst_preprocessor.moc"