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import sys
import unittest
import weakref
sys.path.insert(0, "..")
import pycparser.c_ast as c_ast
from pycparser.c_parser import Coord
class Test_c_ast(unittest.TestCase):
def test_BinaryOp(self):
b1 = c_ast.BinaryOp(
op="+",
left=c_ast.Constant(type="int", value="6"),
right=c_ast.ID(name="joe"),
)
self.assertIsInstance(b1.left, c_ast.Constant)
self.assertEqual(b1.left.type, "int")
self.assertEqual(b1.left.value, "6")
self.assertIsInstance(b1.right, c_ast.ID)
self.assertEqual(b1.right.name, "joe")
def test_weakref_works_on_nodes(self):
c1 = c_ast.Constant(type="float", value="3.14")
wr = weakref.ref(c1)
cref = wr()
self.assertIsNotNone(cref)
assert cref is not None
self.assertEqual(cref.type, "float")
self.assertEqual(weakref.getweakrefcount(c1), 1)
def test_weakref_works_on_coord(self):
coord = Coord(file="a", line=2)
wr = weakref.ref(coord)
cref = wr()
self.assertIsNotNone(cref)
assert cref is not None
self.assertEqual(cref.line, 2)
self.assertEqual(weakref.getweakrefcount(coord), 1)
class TestNodeVisitor(unittest.TestCase):
class ConstantVisitor(c_ast.NodeVisitor):
def __init__(self):
self.values = []
def visit_Constant(self, node):
self.values.append(node.value)
def test_scalar_children(self):
b1 = c_ast.BinaryOp(
op="+",
left=c_ast.Constant(type="int", value="6"),
right=c_ast.ID(name="joe"),
)
cv = self.ConstantVisitor()
cv.visit(b1)
self.assertEqual(cv.values, ["6"])
b2 = c_ast.BinaryOp(
op="*", left=c_ast.Constant(type="int", value="111"), right=b1
)
b3 = c_ast.BinaryOp(op="^", left=b2, right=b1)
cv = self.ConstantVisitor()
cv.visit(b3)
self.assertEqual(cv.values, ["111", "6", "6"])
def tests_list_children(self):
c1 = c_ast.Constant(type="float", value="5.6")
c2 = c_ast.Constant(type="char", value="t")
b1 = c_ast.BinaryOp(op="+", left=c1, right=c2)
b2 = c_ast.BinaryOp(op="-", left=b1, right=c2)
comp = c_ast.Compound(block_items=[b1, b2, c1, c2])
cv = self.ConstantVisitor()
cv.visit(comp)
self.assertEqual(cv.values, ["5.6", "t", "5.6", "t", "t", "5.6", "t"])
def test_repr(self):
c1 = c_ast.Constant(type="float", value="5.6")
c2 = c_ast.Constant(type="char", value="t")
b1 = c_ast.BinaryOp(op="+", left=c1, right=c2)
b2 = c_ast.BinaryOp(op="-", left=b1, right=c2)
comp = c_ast.Compound(block_items=[b1, b2, c1, c2])
expected = (
"Compound(block_items=[BinaryOp(op='+',\n"
" left=Constant(type='float',\n"
" value='5.6'\n"
" ),\n"
" right=Constant(type='char',\n"
" value='t'\n"
" )\n"
" ),\n"
" BinaryOp(op='-',\n"
" left=BinaryOp(op='+',\n"
" left=Constant(type='float',\n"
" value='5.6'\n"
" ),\n"
" right=Constant(type='char',\n"
" value='t'\n"
" )\n"
" ),\n"
" right=Constant(type='char',\n"
" value='t'\n"
" )\n"
" ),\n"
" Constant(type='float',\n"
" value='5.6'\n"
" ),\n"
" Constant(type='char',\n"
" value='t'\n"
" )\n"
" ]\n"
" )"
)
self.assertEqual(repr(comp), expected)
if __name__ == "__main__":
unittest.main()
|
