C++: Add a failing test.

Author: MathiasVP

cpp/ql/test/library-tests/dataflow/parameters-without-defs/test.cpp

@@ -0,0 +1,11 @@
+void sink(int); // $ MISSING: ir
+void indirect_sink(int*); // $ MISSING: ir
+int source();
+
+void test() {
+  int x = source();
+  sink(x);
+
+  int* p = &x;
+  indirect_sink(p);
+}

cpp/ql/test/library-tests/dataflow/parameters-without-defs/test.expected

@@ -0,0 +1,2 @@
+testFailures
+failures

cpp/ql/test/library-tests/dataflow/parameters-without-defs/test.ql

@@ -0,0 +1,16 @@
+import TestUtilities.dataflow.FlowTestCommon
+import semmle.code.cpp.dataflow.new.DataFlow
+
+module ParamConfig implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node source) { source.asExpr().(Call).getTarget().hasName("source") }
+
+  predicate isSink(DataFlow::Node sink) {
+    sink.asParameter().getFunction().hasName("sink")
+    or
+    sink.asParameter(1).getFunction().hasName("indirect_sink")
+  }
+}
+
+module IRFlow = DataFlow::Global<ParamConfig>;
+
+import MakeTest<IRFlowTest<IRFlow>>