Python: Add redimentary tests for new Value API.

Author: markshannon

python/ql/test/library-tests/PointsTo/api/ClassValue.expected

@@ -0,0 +1,5 @@
+| file://:0:0:0:0 | builtin-class bool | bool |
+| file://:0:0:0:0 | builtin-class classmethod | classmethod |
+| file://:0:0:0:0 | builtin-class float | float |
+| file://:0:0:0:0 | builtin-class int | int |
+| file://:0:0:0:0 | builtin-class object | object |

python/ql/test/library-tests/PointsTo/api/ClassValue.ql

@@ -0,0 +1,15 @@
+import python
+
+from ClassValue cls, string description
+where
+    cls = ClassValue::bool() and description = "bool"
+    or
+    cls = ClassValue::int_() and description = "int"
+    or
+    cls = ClassValue::float_() and description = "float"
+    or
+    cls = ClassValue::classmethod() and description = "classmethod"
+    or
+    cls = ClassValue::bool().getMro().getItem(2) and description = "object"
+
+select cls, description

python/ql/test/library-tests/PointsTo/api/Value.expected

@@ -0,0 +1,4 @@
+| file://:0:0:0:0 | builtin-class ValueError | ValueError |
+| file://:0:0:0:0 | builtin-class bool | bool |
+| file://:0:0:0:0 | builtin-class slice | slice |
+| file://:0:0:0:0 | list object | sys.argv |

python/ql/test/library-tests/PointsTo/api/Value.ql

@@ -0,0 +1,12 @@
+import python
+
+from Value val, string name
+where
+    val = Value::named(name)
+    and
+    (
+        name = "bool" or name = "sys" or name = "sys.argv" or
+        name = "ValueError" or name = "slice"
+    )
+
+select val, name