Viewing file:  test_symtable.py (9.13 KB) -rw-r--r--
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"""
Test the API of the symtable module.
"""
import symtable
import unittest
TEST_CODE = """
import sys
glob = 42
some_var = 12
some_non_assigned_global_var = 11
some_assigned_global_var = 11
class Mine:
instance_var = 24
def a_method(p1, p2):
pass
def spam(a, b, *var, **kw):
global bar
global some_assigned_global_var
some_assigned_global_var = 12
bar = 47
some_var = 10
x = 23
glob
def internal():
return x
def other_internal():
nonlocal some_var
some_var = 3
return some_var
return internal
def foo():
pass
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):
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")
other_internal = find_block(spam, "other_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.assertTrue(self.spam.is_optimized())
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(), 14)
def test_function_info(self):
func = self.spam
self.assertEqual(sorted(func.get_parameters()), ["a", "b", "kw", "var"])
expected = ['a', 'b', 'internal', 'kw', 'other_internal', 'some_var', 'var', 'x']
self.assertEqual(sorted(func.get_locals()), expected)
self.assertEqual(sorted(func.get_globals()), ["bar", "glob", "some_assigned_global_var"])
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())
self.assertTrue(self.spam.lookup("bar").is_global())
# Module-scope globals are both global and local
self.assertTrue(self.top.lookup("some_non_assigned_global_var").is_global())
self.assertTrue(self.top.lookup("some_assigned_global_var").is_global())
def test_nonlocal(self):
self.assertFalse(self.spam.lookup("some_var").is_nonlocal())
self.assertTrue(self.other_internal.lookup("some_var").is_nonlocal())
expected = ("some_var",)
self.assertEqual(self.other_internal.get_nonlocals(), expected)
def test_local(self):
self.assertTrue(self.spam.lookup("x").is_local())
self.assertFalse(self.spam.lookup("bar").is_local())
# Module-scope globals are both global and local
self.assertTrue(self.top.lookup("some_non_assigned_global_var").is_local())
self.assertTrue(self.top.lookup("some_assigned_global_var").is_local())
def test_free(self):
self.assertTrue(self.internal.lookup("x").is_free())
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_annotated(self):
st1 = symtable.symtable('def f():\n x: int\n', 'test', 'exec')
st2 = st1.get_children()[0]
self.assertTrue(st2.lookup('x').is_local())
self.assertTrue(st2.lookup('x').is_annotated())
self.assertFalse(st2.lookup('x').is_global())
st3 = symtable.symtable('def f():\n x = 1\n', 'test', 'exec')
st4 = st3.get_children()[0]
self.assertTrue(st4.lookup('x').is_local())
self.assertFalse(st4.lookup('x').is_annotated())
# Test that annotations in the global scope are valid after the
# variable is declared as nonlocal.
st5 = symtable.symtable('global x\nx: int', 'test', 'exec')
self.assertTrue(st5.lookup("x").is_global())
# Test that annotations for nonlocals are valid after the
# variable is declared as nonlocal.
st6 = symtable.symtable('def g():\n'
' x = 2\n'
' def f():\n'
' nonlocal x\n'
' x: int',
'test', 'exec')
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, offset):
try:
symtable.symtable(brokencode, "spam", "exec")
except SyntaxError as e:
self.assertEqual(e.filename, "spam")
self.assertEqual(e.lineno, 1)
self.assertEqual(e.offset, offset)
else:
self.fail("no SyntaxError for %r" % (brokencode,))
checkfilename("def f(x): foo)(", 14) # parse-time
checkfilename("def f(x): global x", 11) # symtable-build-time
symtable.symtable("pass", b"spam", "exec")
with self.assertWarns(DeprecationWarning), \
self.assertRaises(TypeError):
symtable.symtable("pass", bytearray(b"spam"), "exec")
with self.assertWarns(DeprecationWarning):
symtable.symtable("pass", memoryview(b"spam"), "exec")
with self.assertRaises(TypeError):
symtable.symtable("pass", list(b"spam"), "exec")
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_bytes(self):
top = symtable.symtable(TEST_CODE.encode('utf8'), "?", "exec")
self.assertIsNotNone(find_block(top, "Mine"))
code = b'# -*- coding: iso8859-15 -*-\nclass \xb4: pass\n'
top = symtable.symtable(code, "?", "exec")
self.assertIsNotNone(find_block(top, "\u017d"))
def test_symtable_repr(self):
self.assertEqual(str(self.top), "<SymbolTable for module ?>")
self.assertEqual(str(self.spam), "<Function SymbolTable for spam in ?>")
if __name__ == '__main__':
unittest.main()
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