return packet.context_field[field_name]
+# Base class for numeric field test cases.
+#
+# To be compatible with this base class, a derived class must, in its
+# setUp() method:
+#
+# * Set `self._def` to a field object with an arbitrary value.
+# * Set `self._def_value` to the equivalent value of `self._def`.
class _TestNumericField:
+ # Tries the binary operation `op`:
+ #
+ # 1. Between `self._def`, which is a field object, and `rhs`.
+ # 2. Between `self._def_value`, which is the raw value of
+ # `self._def`, and `rhs`.
+ #
+ # Returns the results of 1. and 2.
+ #
+ # If there's an exception while performing 1. or 2., asserts that
+ # both operations raised exceptions, that both exceptions have the
+ # same type, and returns `None` for both results.
def _binop(self, op, rhs):
- rexc = None
- rvexc = None
+ type_rexc = None
+ type_rvexc = None
comp_value = rhs
+ # try with field object
try:
r = op(self._def, rhs)
except Exception as e:
- rexc = e
+ type_rexc = type(e)
+ # try with value
try:
rv = op(self._def_value, comp_value)
except Exception as e:
- rvexc = e
+ type_rvexc = type(e)
- if rexc is not None or rvexc is not None:
+ if type_rexc is not None or type_rvexc is not None:
# at least one of the operations raised an exception: in
# this case both operations should have raised the same
# type of exception (division by zero, bit shift with a
# floating point number operand, etc.)
- self.assertIs(type(rexc), type(rvexc))
+ self.assertIs(type_rexc, type_rvexc)
return None, None
return r, rv
+ # Tries the unary operation `op`:
+ #
+ # 1. On `self._def`, which is a field object.
+ # 2. On `self._def_value`, which is the value of `self._def`.
+ #
+ # Returns the results of 1. and 2.
+ #
+ # If there's an exception while performing 1. or 2., asserts that
+ # both operations raised exceptions, that both exceptions have the
+ # same type, and returns `None` for both results.
def _unaryop(self, op):
- rexc = None
- rvexc = None
+ type_rexc = None
+ type_rvexc = None
+ # try with field object
try:
r = op(self._def)
except Exception as e:
- rexc = e
+ type_rexc = type(e)
+ # try with value
try:
rv = op(self._def_value)
except Exception as e:
- rvexc = e
+ type_rvexc = type(e)
- if rexc is not None or rvexc is not None:
+ if type_rexc is not None or type_rvexc is not None:
# at least one of the operations raised an exception: in
# this case both operations should have raised the same
# type of exception (division by zero, bit shift with a
# floating point number operand, etc.)
- self.assertIs(type(rexc), type(rvexc))
+ self.assertIs(type_rexc, type_rvexc)
return None, None
return r, rv
+ # Tests that the unary operation `op` gives results with the same
+ # type for both `self._def` and `self._def_value`.
def _test_unaryop_type(self, op):
r, rv = self._unaryop(op)
self.assertIsInstance(r, type(rv))
+ # Tests that the unary operation `op` gives results with the same
+ # value for both `self._def` and `self._def_value`. This uses the
+ # __eq__() operator of `self._def`.
def _test_unaryop_value(self, op):
r, rv = self._unaryop(op)
self.assertEqual(r, rv)
+ # Tests that the unary operation `op`, when applied to `self._def`,
+ # does not change its underlying BT object address.
def _test_unaryop_addr_same(self, op):
addr_before = self._def.addr
self._unaryop(op)
self.assertEqual(self._def.addr, addr_before)
+ # Tests that the unary operation `op`, when applied to `self._def`,
+ # does not change its value.
def _test_unaryop_value_same(self, op):
value_before = copy.copy(self._def_value)
self._unaryop(op)
self.assertEqual(self._def, value_before)
+ # Tests that the binary operation `op` gives results with the same
+ # type for both `self._def` and `self._def_value`.
def _test_binop_type(self, op, rhs):
r, rv = self._binop(op, rhs)
else:
self.assertIsInstance(r, type(rv))
+ # Tests that the binary operation `op` gives results with the same
+ # value for both `self._def` and `self._def_value`. This uses the
+ # __eq__() operator of `self._def`.
def _test_binop_value(self, op, rhs):
r, rv = self._binop(op, rhs)
self.assertEqual(r, rv)
+ # Tests that the binary operation `op`, when applied to `self._def`,
+ # does not change its underlying BT object address.
def _test_binop_lhs_addr_same(self, op, rhs):
addr_before = self._def.addr
r, rv = self._binop(op, rhs)
self.assertEqual(self._def.addr, addr_before)
+ # Tests that the binary operation `op`, when applied to `self._def`,
+ # does not change its value.
@unittest.skip('copy is not implemented')
def _test_binop_lhs_value_same(self, op, rhs):
value_before = copy.copy(self._def)
r, rv = self._binop(op, rhs)
self.assertEqual(self._def, value_before)
+ # The methods below which take the `test_cb` and/or `op` parameters
+ # are meant to be used with one of the _test_binop_*() functions
+ # above as `test_cb` and a binary operator function as `op`.
+ #
+ # For example:
+ #
+ # self._test_binop_rhs_pos_int(self._test_binop_value,
+ # operator.add)
+ #
+ # This tests that a numeric field object added to a positive integer
+ # value gives a result with the expected value.
+ #
+ # `vint` and `vfloat` mean a signed integer value object and a real
+ # value object.
+
def _test_binop_invalid_unknown(self, op):
if op in _COMP_BINOPS:
self.skipTest('not testing')
self.assertTrue(self._def != None) # noqa: E711
+# This is a list of binary operators used for
+# _inject_numeric_testing_methods().
+#
+# Each entry is a pair of binary operator name (used as part of the
+# created testing method's name) and operator function.
_BINOPS = (
('lt', operator.lt),
('le', operator.le),
)
+# This is a list of unary operators used for
+# _inject_numeric_testing_methods().
+#
+# Each entry is a pair of unary operator name (used as part of the
+# created testing method's name) and operator function.
_UNARYOPS = (
('neg', operator.neg),
('pos', operator.pos),
)
+# This function injects a bunch of testing methods to a numeric
+# field test case.
+#
+# It is meant to be used like this:
+#
+# _inject_numeric_testing_methods(MyNumericFieldTestCase)
+#
+# This function injects:
+#
+# * One testing method for each _TestNumericField._test_binop_*()
+# method, for each binary operator in the _BINOPS tuple.
+#
+# * One testing method for each _TestNumericField._test_unaryop*()
+# method, for each unary operator in the _UNARYOPS tuple.
def _inject_numeric_testing_methods(cls):
def test_binop_name(suffix):
return 'test_binop_{}_{}'.format(name, suffix)
projects / babeltrace.git / blobdiff