"""
Test the API of the symtable module.
"""
import symtable
import unittest
from test import test_support
TEST_CODE = """
import sys
glob = 42
class Mine:
instance_var = 24
def a_method(p1, p2):
pass
def spam(a, b, *var, **kw):
global bar
bar = 47
x = 23
glob
def internal():
return x
return internal
def foo():
exec 'm'
from sys import *
def namespace_test(): pass
def namespace_test(): pass
"""
def find_block(block, name):
for ch in block.get_children():
if ch.get_name() == name:
return ch
class SymtableTest(unittest.TestCase):
with test_support.check_warnings(
("import \* only allowed at module level", SyntaxWarning)):
top = symtable.symtable(TEST_CODE, "?", "exec")
# These correspond to scopes in TEST_CODE
Mine = find_block(top, "Mine")
a_method = find_block(Mine, "a_method")
spam = find_block(top, "spam")
internal = find_block(spam, "internal")
foo = find_block(top, "foo")
def test_type(self):
self.assertEqual(self.top.get_type(), "module")
self.assertEqual(self.Mine.get_type(), "class")
self.assertEqual(self.a_method.get_type(), "function")
self.assertEqual(self.spam.get_type(), "function")
self.assertEqual(self.internal.get_type(), "function")
def test_optimized(self):
self.assertFalse(self.top.is_optimized())
self.assertFalse(self.top.has_exec())
self.assertFalse(self.top.has_import_star())
self.assertTrue(self.spam.is_optimized())
self.assertFalse(self.foo.is_optimized())
self.assertTrue(self.foo.has_exec())
self.assertTrue(self.foo.has_import_star())
def test_nested(self):
self.assertFalse(self.top.is_nested())
self.assertFalse(self.Mine.is_nested())
self.assertFalse(self.spam.is_nested())
self.assertTrue(self.internal.is_nested())
def test_children(self):
self.assertTrue(self.top.has_children())
self.assertTrue(self.Mine.has_children())
self.assertFalse(self.foo.has_children())
def test_lineno(self):
self.assertEqual(self.top.get_lineno(), 0)
self.assertEqual(self.spam.get_lineno(), 11)
def test_function_info(self):
func = self.spam
self.assertEqual(sorted(func.get_parameters()), ["a", "b", "kw", "var"])
expected = ["a", "b", "internal", "kw", "var", "x"]
self.assertEqual(sorted(func.get_locals()), expected)
self.assertEqual(sorted(func.get_globals()), ["bar", "glob"])
self.assertEqual(self.internal.get_frees(), ("x",))
def test_globals(self):
self.assertTrue(self.spam.lookup("glob").is_global())
self.assertFalse(self.spam.lookup("glob").is_declared_global())
self.assertTrue(self.spam.lookup("bar").is_global())
self.assertTrue(self.spam.lookup("bar").is_declared_global())
self.assertFalse(self.internal.lookup("x").is_global())
self.assertFalse(self.Mine.lookup("instance_var").is_global())
def test_local(self):
self.assertTrue(self.spam.lookup("x").is_local())
self.assertFalse(self.internal.lookup("x").is_local())
def test_referenced(self):
self.assertTrue(self.internal.lookup("x").is_referenced())
self.assertTrue(self.spam.lookup("internal").is_referenced())
self.assertFalse(self.spam.lookup("x").is_referenced())
def test_parameters(self):
for sym in ("a", "var", "kw"):
self.assertTrue(self.spam.lookup(sym).is_parameter())
self.assertFalse(self.spam.lookup("x").is_parameter())
def test_symbol_lookup(self):
self.assertEqual(len(self.top.get_identifiers()),
len(self.top.get_symbols()))
self.assertRaises(KeyError, self.top.lookup, "not_here")
def test_namespaces(self):
self.assertTrue(self.top.lookup("Mine").is_namespace())
self.assertTrue(self.Mine.lookup("a_method").is_namespace())
self.assertTrue(self.top.lookup("spam").is_namespace())
self.assertTrue(self.spam.lookup("internal").is_namespace())
self.assertTrue(self.top.lookup("namespace_test").is_namespace())
self.assertFalse(self.spam.lookup("x").is_namespace())
self.assertTrue(self.top.lookup("spam").get_namespace() is self.spam)
ns_test = self.top.lookup("namespace_test")
self.assertEqual(len(ns_test.get_namespaces()), 2)
self.assertRaises(ValueError, ns_test.get_namespace)
def test_assigned(self):
self.assertTrue(self.spam.lookup("x").is_assigned())
self.assertTrue(self.spam.lookup("bar").is_assigned())
self.assertTrue(self.top.lookup("spam").is_assigned())
self.assertTrue(self.Mine.lookup("a_method").is_assigned())
self.assertFalse(self.internal.lookup("x").is_assigned())
def test_imported(self):
self.assertTrue(self.top.lookup("sys").is_imported())
def test_name(self):
self.assertEqual(self.top.get_name(), "top")
self.assertEqual(self.spam.get_name(), "spam")
self.assertEqual(self.spam.lookup("x").get_name(), "x")
self.assertEqual(self.Mine.get_name(), "Mine")
def test_class_info(self):
self.assertEqual(self.Mine.get_methods(), ('a_method',))
def test_filename_correct(self):
### Bug tickler: SyntaxError file name correct whether error raised
### while parsing or building symbol table.
def checkfilename(brokencode):
try:
symtable.symtable(brokencode, "spam", "exec")
except SyntaxError as e:
self.assertEqual(e.filename, "spam")
else:
self.fail("no SyntaxError for %r" % (brokencode,))
checkfilename("def f(x): foo)(") # parse-time
checkfilename("def f(x): global x") # symtable-build-time
def test_eval(self):
symbols = symtable.symtable("42", "?", "eval")
def test_single(self):
symbols = symtable.symtable("42", "?", "single")
def test_exec(self):
symbols = symtable.symtable("def f(x): return x", "?", "exec")
def test_main():
test_support.run_unittest(SymtableTest)
if __name__ == '__main__':
test_main()