Python: Add test for DefinitionNode default parameter value

Author: RasmusWL

python/ql/test/library-tests/variables/definitions/definition-values.expected

@@ -0,0 +1,3 @@
+| test.py:3:5:3:9 | ControlFlowNode for fail5 | test.py:3:1:3:13 | ControlFlowNode for FunctionExpr |
+| test.py:4:5:4:8 | ControlFlowNode for Tuple | test.py:4:12:4:12 | ControlFlowNode for t |
+| test.py:7:5:7:26 | ControlFlowNode for default_value_in_param | test.py:7:1:7:33 | ControlFlowNode for FunctionExpr |

python/ql/test/library-tests/variables/definitions/definition-values.ql

@@ -0,0 +1,4 @@
+import python
+
+from DefinitionNode d
+select d, d.getValue()

python/ql/test/library-tests/variables/definitions/test.expected

@@ -1,4 +1,5 @@
 | 3 | 5 | ControlFlowNode for fail5 |
 | 4 | 5 | ControlFlowNode for Tuple |
 | 4 | 5 | ControlFlowNode for x |
-| 4 | 8 | ControlFlowNode for y |
+| 4 | 8 | ControlFlowNode for y |
+| 7 | 5 | ControlFlowNode for default_value_in_param |

python/ql/test/library-tests/variables/definitions/test.py

@@ -3,3 +3,6 @@
 def fail5(t):
     x, y = t
     return x
+
+def default_value_in_param(x=42):
+    print(x)