def test_reparse_on_scope_change(self):
self.top.comp.x = 99.5
self.top.comp.y = -3.14
ex = ExprEvaluator('comp.x', self.top)
self.assertEqual(99.5, ex.evaluate())
self.assertEqual(self._ast_to_text(ex._parse()), "scope.get('comp.x')")
ex.scope = self.top.a
try:
ex.set(0.5)
except AttributeError as err:
self.assertEqual(str(err), "a: object has no attribute 'comp.x'")
else:
self.fail("AttributeError expected")
self.assertEqual(self._ast_to_text(ex._parse()), "scope.get('comp.x')")
self.assertEqual(99.5, ex.evaluate(self.top)) # set scope back to self.top
self.assertEqual(self._ast_to_text(ex._parse()), "scope.get('comp.x')")
ex.text = 'comp.y'
try:
ex.evaluate(self.top.a)
except AttributeError as err:
self.assertEqual(str(err), "can't evaluate expression 'comp.y': a: object has no attribute 'comp.y'")
else:
self.fail("AttributeError expected")
ex.scope = self.top
ex.set(11.1)
self.assertEqual(11.1, self.top.comp.y)
self.assertEqual(self._ast_to_text(ex._parse()), "scope.get('comp.y')")
def test_reparse_on_scope_change(self):
self.top.comp.x = 99.5
self.top.comp.y = -3.14
ex = ExprEvaluator('comp.x', self.top)
self.assertEqual(99.5, ex.evaluate())
self.assertEqual(self._ast_to_text(ex._parse()), "scope.get('comp.x')")
ex.scope = self.top.a
try:
ex.set(0.5)
except AttributeError as err:
self.assertEqual(str(err), "a: object has no attribute 'comp.x'")
else:
self.fail("AttributeError expected")
self.assertEqual(self._ast_to_text(ex._parse()), "scope.get('comp.x')")
self.assertEqual(99.5,
ex.evaluate(self.top)) # set scope back to self.top
self.assertEqual(self._ast_to_text(ex._parse()), "scope.get('comp.x')")
ex.text = 'comp.y'
try:
ex.evaluate(self.top.a)
except AttributeError as err:
self.assertEqual(
str(err),
"can't evaluate expression 'comp.y': a: 'A' object has no attribute 'comp'"
)
else:
self.fail("AttributeError expected")
ex.scope = self.top
ex.set(11.1)
self.assertEqual(11.1, self.top.comp.y)
self.assertEqual(self._ast_to_text(ex._parse()), "scope.get('comp.y')")
def _do_tests(self, tests, top):
# each test is a tuple of the form (input, expected output)
for tst in tests:
ex = ExprEvaluator(tst[0], top)
self.assertEqual(self._ast_to_text(ex._parse()), tst[1])
def _do_tests(self, tests, top):
# each test is a tuple of the form (input, expected output)
for tst in tests:
ex = ExprEvaluator(tst[0], top)
self.assertEqual(self._ast_to_text(ex._parse()), tst[1])
