Merge newinterpret into reinterpret.py
This commit is contained in:
Bruno Oliveira
parent
379562107e
commit
943099ddd1
|
|
@ -1,364 +0,0 @@
|
|||
"""
|
||||
Find intermediate evalutation results in assert statements through builtin AST.
|
||||
"""
|
||||
|
||||
import sys
|
||||
import ast
|
||||
|
||||
import py
|
||||
from _pytest.assertion import util
|
||||
from _pytest.assertion.reinterpret import BuiltinAssertionError
|
||||
|
||||
|
||||
if sys.platform.startswith("java"):
|
||||
# See http://bugs.jython.org/issue1497
|
||||
_exprs = ("BoolOp", "BinOp", "UnaryOp", "Lambda", "IfExp", "Dict",
|
||||
"ListComp", "GeneratorExp", "Yield", "Compare", "Call",
|
||||
"Repr", "Num", "Str", "Attribute", "Subscript", "Name",
|
||||
"List", "Tuple")
|
||||
_stmts = ("FunctionDef", "ClassDef", "Return", "Delete", "Assign",
|
||||
"AugAssign", "Print", "For", "While", "If", "With", "Raise",
|
||||
"TryExcept", "TryFinally", "Assert", "Import", "ImportFrom",
|
||||
"Exec", "Global", "Expr", "Pass", "Break", "Continue")
|
||||
_expr_nodes = set(getattr(ast, name) for name in _exprs)
|
||||
_stmt_nodes = set(getattr(ast, name) for name in _stmts)
|
||||
def _is_ast_expr(node):
|
||||
return node.__class__ in _expr_nodes
|
||||
def _is_ast_stmt(node):
|
||||
return node.__class__ in _stmt_nodes
|
||||
else:
|
||||
def _is_ast_expr(node):
|
||||
return isinstance(node, ast.expr)
|
||||
def _is_ast_stmt(node):
|
||||
return isinstance(node, ast.stmt)
|
||||
|
||||
try:
|
||||
_Starred = ast.Starred
|
||||
except AttributeError:
|
||||
# Python 2. Define a dummy class so isinstance() will always be False.
|
||||
class _Starred(object): pass
|
||||
|
||||
|
||||
class Failure(Exception):
|
||||
"""Error found while interpreting AST."""
|
||||
|
||||
def __init__(self, explanation=""):
|
||||
self.cause = sys.exc_info()
|
||||
self.explanation = explanation
|
||||
|
||||
|
||||
def interpret(source, frame, should_fail=False):
|
||||
mod = ast.parse(source)
|
||||
visitor = DebugInterpreter(frame)
|
||||
try:
|
||||
visitor.visit(mod)
|
||||
except Failure:
|
||||
failure = sys.exc_info()[1]
|
||||
return getfailure(failure)
|
||||
if should_fail:
|
||||
return ("(assertion failed, but when it was re-run for "
|
||||
"printing intermediate values, it did not fail. Suggestions: "
|
||||
"compute assert expression before the assert or use --assert=plain)")
|
||||
|
||||
def run(offending_line, frame=None):
|
||||
if frame is None:
|
||||
frame = py.code.Frame(sys._getframe(1))
|
||||
return interpret(offending_line, frame)
|
||||
|
||||
def getfailure(e):
|
||||
explanation = util.format_explanation(e.explanation)
|
||||
value = e.cause[1]
|
||||
if str(value):
|
||||
lines = explanation.split('\n')
|
||||
lines[0] += " << %s" % (value,)
|
||||
explanation = '\n'.join(lines)
|
||||
text = "%s: %s" % (e.cause[0].__name__, explanation)
|
||||
if text.startswith('AssertionError: assert '):
|
||||
text = text[16:]
|
||||
return text
|
||||
|
||||
operator_map = {
|
||||
ast.BitOr : "|",
|
||||
ast.BitXor : "^",
|
||||
ast.BitAnd : "&",
|
||||
ast.LShift : "<<",
|
||||
ast.RShift : ">>",
|
||||
ast.Add : "+",
|
||||
ast.Sub : "-",
|
||||
ast.Mult : "*",
|
||||
ast.Div : "/",
|
||||
ast.FloorDiv : "//",
|
||||
ast.Mod : "%",
|
||||
ast.Eq : "==",
|
||||
ast.NotEq : "!=",
|
||||
ast.Lt : "<",
|
||||
ast.LtE : "<=",
|
||||
ast.Gt : ">",
|
||||
ast.GtE : ">=",
|
||||
ast.Pow : "**",
|
||||
ast.Is : "is",
|
||||
ast.IsNot : "is not",
|
||||
ast.In : "in",
|
||||
ast.NotIn : "not in"
|
||||
}
|
||||
|
||||
unary_map = {
|
||||
ast.Not : "not %s",
|
||||
ast.Invert : "~%s",
|
||||
ast.USub : "-%s",
|
||||
ast.UAdd : "+%s"
|
||||
}
|
||||
|
||||
|
||||
class DebugInterpreter(ast.NodeVisitor):
|
||||
"""Interpret AST nodes to gleam useful debugging information. """
|
||||
|
||||
def __init__(self, frame):
|
||||
self.frame = frame
|
||||
|
||||
def generic_visit(self, node):
|
||||
# Fallback when we don't have a special implementation.
|
||||
if _is_ast_expr(node):
|
||||
mod = ast.Expression(node)
|
||||
co = self._compile(mod)
|
||||
try:
|
||||
result = self.frame.eval(co)
|
||||
except Exception:
|
||||
raise Failure()
|
||||
explanation = self.frame.repr(result)
|
||||
return explanation, result
|
||||
elif _is_ast_stmt(node):
|
||||
mod = ast.Module([node])
|
||||
co = self._compile(mod, "exec")
|
||||
try:
|
||||
self.frame.exec_(co)
|
||||
except Exception:
|
||||
raise Failure()
|
||||
return None, None
|
||||
else:
|
||||
raise AssertionError("can't handle %s" %(node,))
|
||||
|
||||
def _compile(self, source, mode="eval"):
|
||||
return compile(source, "<assertion interpretation>", mode)
|
||||
|
||||
def visit_Expr(self, expr):
|
||||
return self.visit(expr.value)
|
||||
|
||||
def visit_Module(self, mod):
|
||||
for stmt in mod.body:
|
||||
self.visit(stmt)
|
||||
|
||||
def visit_Name(self, name):
|
||||
explanation, result = self.generic_visit(name)
|
||||
# See if the name is local.
|
||||
source = "%r in locals() is not globals()" % (name.id,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
local = self.frame.eval(co)
|
||||
except Exception:
|
||||
# have to assume it isn't
|
||||
local = None
|
||||
if local is None or not self.frame.is_true(local):
|
||||
return name.id, result
|
||||
return explanation, result
|
||||
|
||||
def visit_Compare(self, comp):
|
||||
left = comp.left
|
||||
left_explanation, left_result = self.visit(left)
|
||||
for op, next_op in zip(comp.ops, comp.comparators):
|
||||
next_explanation, next_result = self.visit(next_op)
|
||||
op_symbol = operator_map[op.__class__]
|
||||
explanation = "%s %s %s" % (left_explanation, op_symbol,
|
||||
next_explanation)
|
||||
source = "__exprinfo_left %s __exprinfo_right" % (op_symbol,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
result = self.frame.eval(co, __exprinfo_left=left_result,
|
||||
__exprinfo_right=next_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
try:
|
||||
if not self.frame.is_true(result):
|
||||
break
|
||||
except KeyboardInterrupt:
|
||||
raise
|
||||
except:
|
||||
break
|
||||
left_explanation, left_result = next_explanation, next_result
|
||||
|
||||
if util._reprcompare is not None:
|
||||
res = util._reprcompare(op_symbol, left_result, next_result)
|
||||
if res:
|
||||
explanation = res
|
||||
return explanation, result
|
||||
|
||||
def visit_BoolOp(self, boolop):
|
||||
is_or = isinstance(boolop.op, ast.Or)
|
||||
explanations = []
|
||||
for operand in boolop.values:
|
||||
explanation, result = self.visit(operand)
|
||||
explanations.append(explanation)
|
||||
if result == is_or:
|
||||
break
|
||||
name = is_or and " or " or " and "
|
||||
explanation = "(" + name.join(explanations) + ")"
|
||||
return explanation, result
|
||||
|
||||
def visit_UnaryOp(self, unary):
|
||||
pattern = unary_map[unary.op.__class__]
|
||||
operand_explanation, operand_result = self.visit(unary.operand)
|
||||
explanation = pattern % (operand_explanation,)
|
||||
co = self._compile(pattern % ("__exprinfo_expr",))
|
||||
try:
|
||||
result = self.frame.eval(co, __exprinfo_expr=operand_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
return explanation, result
|
||||
|
||||
def visit_BinOp(self, binop):
|
||||
left_explanation, left_result = self.visit(binop.left)
|
||||
right_explanation, right_result = self.visit(binop.right)
|
||||
symbol = operator_map[binop.op.__class__]
|
||||
explanation = "(%s %s %s)" % (left_explanation, symbol,
|
||||
right_explanation)
|
||||
source = "__exprinfo_left %s __exprinfo_right" % (symbol,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
result = self.frame.eval(co, __exprinfo_left=left_result,
|
||||
__exprinfo_right=right_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
return explanation, result
|
||||
|
||||
def visit_Call(self, call):
|
||||
func_explanation, func = self.visit(call.func)
|
||||
arg_explanations = []
|
||||
ns = {"__exprinfo_func" : func}
|
||||
arguments = []
|
||||
for arg in call.args:
|
||||
arg_explanation, arg_result = self.visit(arg)
|
||||
if isinstance(arg, _Starred):
|
||||
arg_name = "__exprinfo_star"
|
||||
ns[arg_name] = arg_result
|
||||
arguments.append("*%s" % (arg_name,))
|
||||
arg_explanations.append("*%s" % (arg_explanation,))
|
||||
else:
|
||||
arg_name = "__exprinfo_%s" % (len(ns),)
|
||||
ns[arg_name] = arg_result
|
||||
arguments.append(arg_name)
|
||||
arg_explanations.append(arg_explanation)
|
||||
for keyword in call.keywords:
|
||||
arg_explanation, arg_result = self.visit(keyword.value)
|
||||
if keyword.arg:
|
||||
arg_name = "__exprinfo_%s" % (len(ns),)
|
||||
keyword_source = "%s=%%s" % (keyword.arg)
|
||||
arguments.append(keyword_source % (arg_name,))
|
||||
arg_explanations.append(keyword_source % (arg_explanation,))
|
||||
else:
|
||||
arg_name = "__exprinfo_kwds"
|
||||
arguments.append("**%s" % (arg_name,))
|
||||
arg_explanations.append("**%s" % (arg_explanation,))
|
||||
|
||||
ns[arg_name] = arg_result
|
||||
|
||||
if getattr(call, 'starargs', None):
|
||||
arg_explanation, arg_result = self.visit(call.starargs)
|
||||
arg_name = "__exprinfo_star"
|
||||
ns[arg_name] = arg_result
|
||||
arguments.append("*%s" % (arg_name,))
|
||||
arg_explanations.append("*%s" % (arg_explanation,))
|
||||
|
||||
if getattr(call, 'kwargs', None):
|
||||
arg_explanation, arg_result = self.visit(call.kwargs)
|
||||
arg_name = "__exprinfo_kwds"
|
||||
ns[arg_name] = arg_result
|
||||
arguments.append("**%s" % (arg_name,))
|
||||
arg_explanations.append("**%s" % (arg_explanation,))
|
||||
args_explained = ", ".join(arg_explanations)
|
||||
explanation = "%s(%s)" % (func_explanation, args_explained)
|
||||
args = ", ".join(arguments)
|
||||
source = "__exprinfo_func(%s)" % (args,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
result = self.frame.eval(co, **ns)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
pattern = "%s\n{%s = %s\n}"
|
||||
rep = self.frame.repr(result)
|
||||
explanation = pattern % (rep, rep, explanation)
|
||||
return explanation, result
|
||||
|
||||
def _is_builtin_name(self, name):
|
||||
pattern = "%r not in globals() and %r not in locals()"
|
||||
source = pattern % (name.id, name.id)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
return self.frame.eval(co)
|
||||
except Exception:
|
||||
return False
|
||||
|
||||
def visit_Attribute(self, attr):
|
||||
if not isinstance(attr.ctx, ast.Load):
|
||||
return self.generic_visit(attr)
|
||||
source_explanation, source_result = self.visit(attr.value)
|
||||
explanation = "%s.%s" % (source_explanation, attr.attr)
|
||||
source = "__exprinfo_expr.%s" % (attr.attr,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
try:
|
||||
result = self.frame.eval(co, __exprinfo_expr=source_result)
|
||||
except AttributeError:
|
||||
# Maybe the attribute name needs to be mangled?
|
||||
if not attr.attr.startswith("__") or attr.attr.endswith("__"):
|
||||
raise
|
||||
source = "getattr(__exprinfo_expr.__class__, '__name__', '')"
|
||||
co = self._compile(source)
|
||||
class_name = self.frame.eval(co, __exprinfo_expr=source_result)
|
||||
mangled_attr = "_" + class_name + attr.attr
|
||||
source = "__exprinfo_expr.%s" % (mangled_attr,)
|
||||
co = self._compile(source)
|
||||
result = self.frame.eval(co, __exprinfo_expr=source_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
explanation = "%s\n{%s = %s.%s\n}" % (self.frame.repr(result),
|
||||
self.frame.repr(result),
|
||||
source_explanation, attr.attr)
|
||||
# Check if the attr is from an instance.
|
||||
source = "%r in getattr(__exprinfo_expr, '__dict__', {})"
|
||||
source = source % (attr.attr,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
from_instance = self.frame.eval(co, __exprinfo_expr=source_result)
|
||||
except Exception:
|
||||
from_instance = None
|
||||
if from_instance is None or self.frame.is_true(from_instance):
|
||||
rep = self.frame.repr(result)
|
||||
pattern = "%s\n{%s = %s\n}"
|
||||
explanation = pattern % (rep, rep, explanation)
|
||||
return explanation, result
|
||||
|
||||
def visit_Assert(self, assrt):
|
||||
test_explanation, test_result = self.visit(assrt.test)
|
||||
explanation = "assert %s" % (test_explanation,)
|
||||
if not self.frame.is_true(test_result):
|
||||
try:
|
||||
raise BuiltinAssertionError
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
return explanation, test_result
|
||||
|
||||
def visit_Assign(self, assign):
|
||||
value_explanation, value_result = self.visit(assign.value)
|
||||
explanation = "... = %s" % (value_explanation,)
|
||||
name = ast.Name("__exprinfo_expr", ast.Load(),
|
||||
lineno=assign.value.lineno,
|
||||
col_offset=assign.value.col_offset)
|
||||
new_assign = ast.Assign(assign.targets, name, lineno=assign.lineno,
|
||||
col_offset=assign.col_offset)
|
||||
mod = ast.Module([new_assign])
|
||||
co = self._compile(mod, "exec")
|
||||
try:
|
||||
self.frame.exec_(co, __exprinfo_expr=value_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
return explanation, value_result
|
||||
|
|
@ -1,12 +1,16 @@
|
|||
"""
|
||||
Find intermediate evalutation results in assert statements through builtin AST.
|
||||
"""
|
||||
import ast
|
||||
import sys
|
||||
import py
|
||||
from _pytest.assertion.util import BuiltinAssertionError
|
||||
from _pytest.assertion import util
|
||||
u = py.builtin._totext
|
||||
|
||||
|
||||
class AssertionError(BuiltinAssertionError):
|
||||
class AssertionError(util.BuiltinAssertionError):
|
||||
def __init__(self, *args):
|
||||
BuiltinAssertionError.__init__(self, *args)
|
||||
util.BuiltinAssertionError.__init__(self, *args)
|
||||
if args:
|
||||
# on Python2.6 we get len(args)==2 for: assert 0, (x,y)
|
||||
# on Python2.7 and above we always get len(args) == 1
|
||||
|
|
@ -46,4 +50,356 @@ class AssertionError(BuiltinAssertionError):
|
|||
if sys.version_info > (3, 0):
|
||||
AssertionError.__module__ = "builtins"
|
||||
|
||||
from _pytest.assertion.newinterpret import interpret as reinterpret
|
||||
if sys.platform.startswith("java"):
|
||||
# See http://bugs.jython.org/issue1497
|
||||
_exprs = ("BoolOp", "BinOp", "UnaryOp", "Lambda", "IfExp", "Dict",
|
||||
"ListComp", "GeneratorExp", "Yield", "Compare", "Call",
|
||||
"Repr", "Num", "Str", "Attribute", "Subscript", "Name",
|
||||
"List", "Tuple")
|
||||
_stmts = ("FunctionDef", "ClassDef", "Return", "Delete", "Assign",
|
||||
"AugAssign", "Print", "For", "While", "If", "With", "Raise",
|
||||
"TryExcept", "TryFinally", "Assert", "Import", "ImportFrom",
|
||||
"Exec", "Global", "Expr", "Pass", "Break", "Continue")
|
||||
_expr_nodes = set(getattr(ast, name) for name in _exprs)
|
||||
_stmt_nodes = set(getattr(ast, name) for name in _stmts)
|
||||
def _is_ast_expr(node):
|
||||
return node.__class__ in _expr_nodes
|
||||
def _is_ast_stmt(node):
|
||||
return node.__class__ in _stmt_nodes
|
||||
else:
|
||||
def _is_ast_expr(node):
|
||||
return isinstance(node, ast.expr)
|
||||
def _is_ast_stmt(node):
|
||||
return isinstance(node, ast.stmt)
|
||||
|
||||
try:
|
||||
_Starred = ast.Starred
|
||||
except AttributeError:
|
||||
# Python 2. Define a dummy class so isinstance() will always be False.
|
||||
class _Starred(object): pass
|
||||
|
||||
|
||||
class Failure(Exception):
|
||||
"""Error found while interpreting AST."""
|
||||
|
||||
def __init__(self, explanation=""):
|
||||
self.cause = sys.exc_info()
|
||||
self.explanation = explanation
|
||||
|
||||
|
||||
def reinterpret(source, frame, should_fail=False):
|
||||
mod = ast.parse(source)
|
||||
visitor = DebugInterpreter(frame)
|
||||
try:
|
||||
visitor.visit(mod)
|
||||
except Failure:
|
||||
failure = sys.exc_info()[1]
|
||||
return getfailure(failure)
|
||||
if should_fail:
|
||||
return ("(assertion failed, but when it was re-run for "
|
||||
"printing intermediate values, it did not fail. Suggestions: "
|
||||
"compute assert expression before the assert or use --assert=plain)")
|
||||
|
||||
def run(offending_line, frame=None):
|
||||
if frame is None:
|
||||
frame = py.code.Frame(sys._getframe(1))
|
||||
return reinterpret(offending_line, frame)
|
||||
|
||||
def getfailure(e):
|
||||
explanation = util.format_explanation(e.explanation)
|
||||
value = e.cause[1]
|
||||
if str(value):
|
||||
lines = explanation.split('\n')
|
||||
lines[0] += " << %s" % (value,)
|
||||
explanation = '\n'.join(lines)
|
||||
text = "%s: %s" % (e.cause[0].__name__, explanation)
|
||||
if text.startswith('AssertionError: assert '):
|
||||
text = text[16:]
|
||||
return text
|
||||
|
||||
operator_map = {
|
||||
ast.BitOr : "|",
|
||||
ast.BitXor : "^",
|
||||
ast.BitAnd : "&",
|
||||
ast.LShift : "<<",
|
||||
ast.RShift : ">>",
|
||||
ast.Add : "+",
|
||||
ast.Sub : "-",
|
||||
ast.Mult : "*",
|
||||
ast.Div : "/",
|
||||
ast.FloorDiv : "//",
|
||||
ast.Mod : "%",
|
||||
ast.Eq : "==",
|
||||
ast.NotEq : "!=",
|
||||
ast.Lt : "<",
|
||||
ast.LtE : "<=",
|
||||
ast.Gt : ">",
|
||||
ast.GtE : ">=",
|
||||
ast.Pow : "**",
|
||||
ast.Is : "is",
|
||||
ast.IsNot : "is not",
|
||||
ast.In : "in",
|
||||
ast.NotIn : "not in"
|
||||
}
|
||||
|
||||
unary_map = {
|
||||
ast.Not : "not %s",
|
||||
ast.Invert : "~%s",
|
||||
ast.USub : "-%s",
|
||||
ast.UAdd : "+%s"
|
||||
}
|
||||
|
||||
|
||||
class DebugInterpreter(ast.NodeVisitor):
|
||||
"""Interpret AST nodes to gleam useful debugging information. """
|
||||
|
||||
def __init__(self, frame):
|
||||
self.frame = frame
|
||||
|
||||
def generic_visit(self, node):
|
||||
# Fallback when we don't have a special implementation.
|
||||
if _is_ast_expr(node):
|
||||
mod = ast.Expression(node)
|
||||
co = self._compile(mod)
|
||||
try:
|
||||
result = self.frame.eval(co)
|
||||
except Exception:
|
||||
raise Failure()
|
||||
explanation = self.frame.repr(result)
|
||||
return explanation, result
|
||||
elif _is_ast_stmt(node):
|
||||
mod = ast.Module([node])
|
||||
co = self._compile(mod, "exec")
|
||||
try:
|
||||
self.frame.exec_(co)
|
||||
except Exception:
|
||||
raise Failure()
|
||||
return None, None
|
||||
else:
|
||||
raise AssertionError("can't handle %s" %(node,))
|
||||
|
||||
def _compile(self, source, mode="eval"):
|
||||
return compile(source, "<assertion interpretation>", mode)
|
||||
|
||||
def visit_Expr(self, expr):
|
||||
return self.visit(expr.value)
|
||||
|
||||
def visit_Module(self, mod):
|
||||
for stmt in mod.body:
|
||||
self.visit(stmt)
|
||||
|
||||
def visit_Name(self, name):
|
||||
explanation, result = self.generic_visit(name)
|
||||
# See if the name is local.
|
||||
source = "%r in locals() is not globals()" % (name.id,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
local = self.frame.eval(co)
|
||||
except Exception:
|
||||
# have to assume it isn't
|
||||
local = None
|
||||
if local is None or not self.frame.is_true(local):
|
||||
return name.id, result
|
||||
return explanation, result
|
||||
|
||||
def visit_Compare(self, comp):
|
||||
left = comp.left
|
||||
left_explanation, left_result = self.visit(left)
|
||||
for op, next_op in zip(comp.ops, comp.comparators):
|
||||
next_explanation, next_result = self.visit(next_op)
|
||||
op_symbol = operator_map[op.__class__]
|
||||
explanation = "%s %s %s" % (left_explanation, op_symbol,
|
||||
next_explanation)
|
||||
source = "__exprinfo_left %s __exprinfo_right" % (op_symbol,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
result = self.frame.eval(co, __exprinfo_left=left_result,
|
||||
__exprinfo_right=next_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
try:
|
||||
if not self.frame.is_true(result):
|
||||
break
|
||||
except KeyboardInterrupt:
|
||||
raise
|
||||
except:
|
||||
break
|
||||
left_explanation, left_result = next_explanation, next_result
|
||||
|
||||
if util._reprcompare is not None:
|
||||
res = util._reprcompare(op_symbol, left_result, next_result)
|
||||
if res:
|
||||
explanation = res
|
||||
return explanation, result
|
||||
|
||||
def visit_BoolOp(self, boolop):
|
||||
is_or = isinstance(boolop.op, ast.Or)
|
||||
explanations = []
|
||||
for operand in boolop.values:
|
||||
explanation, result = self.visit(operand)
|
||||
explanations.append(explanation)
|
||||
if result == is_or:
|
||||
break
|
||||
name = is_or and " or " or " and "
|
||||
explanation = "(" + name.join(explanations) + ")"
|
||||
return explanation, result
|
||||
|
||||
def visit_UnaryOp(self, unary):
|
||||
pattern = unary_map[unary.op.__class__]
|
||||
operand_explanation, operand_result = self.visit(unary.operand)
|
||||
explanation = pattern % (operand_explanation,)
|
||||
co = self._compile(pattern % ("__exprinfo_expr",))
|
||||
try:
|
||||
result = self.frame.eval(co, __exprinfo_expr=operand_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
return explanation, result
|
||||
|
||||
def visit_BinOp(self, binop):
|
||||
left_explanation, left_result = self.visit(binop.left)
|
||||
right_explanation, right_result = self.visit(binop.right)
|
||||
symbol = operator_map[binop.op.__class__]
|
||||
explanation = "(%s %s %s)" % (left_explanation, symbol,
|
||||
right_explanation)
|
||||
source = "__exprinfo_left %s __exprinfo_right" % (symbol,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
result = self.frame.eval(co, __exprinfo_left=left_result,
|
||||
__exprinfo_right=right_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
return explanation, result
|
||||
|
||||
def visit_Call(self, call):
|
||||
func_explanation, func = self.visit(call.func)
|
||||
arg_explanations = []
|
||||
ns = {"__exprinfo_func" : func}
|
||||
arguments = []
|
||||
for arg in call.args:
|
||||
arg_explanation, arg_result = self.visit(arg)
|
||||
if isinstance(arg, _Starred):
|
||||
arg_name = "__exprinfo_star"
|
||||
ns[arg_name] = arg_result
|
||||
arguments.append("*%s" % (arg_name,))
|
||||
arg_explanations.append("*%s" % (arg_explanation,))
|
||||
else:
|
||||
arg_name = "__exprinfo_%s" % (len(ns),)
|
||||
ns[arg_name] = arg_result
|
||||
arguments.append(arg_name)
|
||||
arg_explanations.append(arg_explanation)
|
||||
for keyword in call.keywords:
|
||||
arg_explanation, arg_result = self.visit(keyword.value)
|
||||
if keyword.arg:
|
||||
arg_name = "__exprinfo_%s" % (len(ns),)
|
||||
keyword_source = "%s=%%s" % (keyword.arg)
|
||||
arguments.append(keyword_source % (arg_name,))
|
||||
arg_explanations.append(keyword_source % (arg_explanation,))
|
||||
else:
|
||||
arg_name = "__exprinfo_kwds"
|
||||
arguments.append("**%s" % (arg_name,))
|
||||
arg_explanations.append("**%s" % (arg_explanation,))
|
||||
|
||||
ns[arg_name] = arg_result
|
||||
|
||||
if getattr(call, 'starargs', None):
|
||||
arg_explanation, arg_result = self.visit(call.starargs)
|
||||
arg_name = "__exprinfo_star"
|
||||
ns[arg_name] = arg_result
|
||||
arguments.append("*%s" % (arg_name,))
|
||||
arg_explanations.append("*%s" % (arg_explanation,))
|
||||
|
||||
if getattr(call, 'kwargs', None):
|
||||
arg_explanation, arg_result = self.visit(call.kwargs)
|
||||
arg_name = "__exprinfo_kwds"
|
||||
ns[arg_name] = arg_result
|
||||
arguments.append("**%s" % (arg_name,))
|
||||
arg_explanations.append("**%s" % (arg_explanation,))
|
||||
args_explained = ", ".join(arg_explanations)
|
||||
explanation = "%s(%s)" % (func_explanation, args_explained)
|
||||
args = ", ".join(arguments)
|
||||
source = "__exprinfo_func(%s)" % (args,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
result = self.frame.eval(co, **ns)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
pattern = "%s\n{%s = %s\n}"
|
||||
rep = self.frame.repr(result)
|
||||
explanation = pattern % (rep, rep, explanation)
|
||||
return explanation, result
|
||||
|
||||
def _is_builtin_name(self, name):
|
||||
pattern = "%r not in globals() and %r not in locals()"
|
||||
source = pattern % (name.id, name.id)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
return self.frame.eval(co)
|
||||
except Exception:
|
||||
return False
|
||||
|
||||
def visit_Attribute(self, attr):
|
||||
if not isinstance(attr.ctx, ast.Load):
|
||||
return self.generic_visit(attr)
|
||||
source_explanation, source_result = self.visit(attr.value)
|
||||
explanation = "%s.%s" % (source_explanation, attr.attr)
|
||||
source = "__exprinfo_expr.%s" % (attr.attr,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
try:
|
||||
result = self.frame.eval(co, __exprinfo_expr=source_result)
|
||||
except AttributeError:
|
||||
# Maybe the attribute name needs to be mangled?
|
||||
if not attr.attr.startswith("__") or attr.attr.endswith("__"):
|
||||
raise
|
||||
source = "getattr(__exprinfo_expr.__class__, '__name__', '')"
|
||||
co = self._compile(source)
|
||||
class_name = self.frame.eval(co, __exprinfo_expr=source_result)
|
||||
mangled_attr = "_" + class_name + attr.attr
|
||||
source = "__exprinfo_expr.%s" % (mangled_attr,)
|
||||
co = self._compile(source)
|
||||
result = self.frame.eval(co, __exprinfo_expr=source_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
explanation = "%s\n{%s = %s.%s\n}" % (self.frame.repr(result),
|
||||
self.frame.repr(result),
|
||||
source_explanation, attr.attr)
|
||||
# Check if the attr is from an instance.
|
||||
source = "%r in getattr(__exprinfo_expr, '__dict__', {})"
|
||||
source = source % (attr.attr,)
|
||||
co = self._compile(source)
|
||||
try:
|
||||
from_instance = self.frame.eval(co, __exprinfo_expr=source_result)
|
||||
except Exception:
|
||||
from_instance = None
|
||||
if from_instance is None or self.frame.is_true(from_instance):
|
||||
rep = self.frame.repr(result)
|
||||
pattern = "%s\n{%s = %s\n}"
|
||||
explanation = pattern % (rep, rep, explanation)
|
||||
return explanation, result
|
||||
|
||||
def visit_Assert(self, assrt):
|
||||
test_explanation, test_result = self.visit(assrt.test)
|
||||
explanation = "assert %s" % (test_explanation,)
|
||||
if not self.frame.is_true(test_result):
|
||||
try:
|
||||
raise util.BuiltinAssertionError
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
return explanation, test_result
|
||||
|
||||
def visit_Assign(self, assign):
|
||||
value_explanation, value_result = self.visit(assign.value)
|
||||
explanation = "... = %s" % (value_explanation,)
|
||||
name = ast.Name("__exprinfo_expr", ast.Load(),
|
||||
lineno=assign.value.lineno,
|
||||
col_offset=assign.value.col_offset)
|
||||
new_assign = ast.Assign(assign.targets, name, lineno=assign.lineno,
|
||||
col_offset=assign.col_offset)
|
||||
mod = ast.Module([new_assign])
|
||||
co = self._compile(mod, "exec")
|
||||
try:
|
||||
self.frame.exec_(co, __exprinfo_expr=value_result)
|
||||
except Exception:
|
||||
raise Failure(explanation)
|
||||
return explanation, value_result
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue