hy/tests/compilers/test_compiler.py

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# Copyright (c) 2013 Julien Danjou <julien@danjou.info>
# Copyright (c) 2013 Nicolas Dandrimont <nicolas.dandrimont@crans.org>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
import ast
import sys
from hy import compiler
from hy.models import HyExpression, HyList, HySymbol, HyInteger
from hy._compat import PY3
if sys.version_info[0] <= 2 and sys.version_info[1] <= 6:
import unittest2 as unittest
else:
import unittest
class CompilerTest(unittest.TestCase):
def test_builds_with_dash(self):
self.assert_(callable(compiler.builds("foobar")))
self.assert_(callable(compiler.builds("foo_bar")))
self.assert_(callable(compiler.builds("-")))
self.assertRaisesRegexp(TypeError,
r"\*post\* translated strings",
compiler.builds, "foobar-with-dash-")
class HyASTCompilerTest(unittest.TestCase):
@staticmethod
def _make_expression(*args):
h = HyExpression(args)
h.start_line = 1
h.end_line = 1
h.start_column = 1
h.end_column = 1
return h.replace(h)
def setUp(self):
self.c = compiler.HyASTCompiler('test')
def test_compiler_bare_names(self):
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"""
Check that the compiler doesn't drop bare names from code branches
"""
ret = self.c.compile(self._make_expression(HySymbol("do"),
HySymbol("a"),
HySymbol("b"),
HySymbol("c")))
# We expect two statements and a final expr.
self.assertEqual(len(ret.stmts), 2)
stmt = ret.stmts[0]
self.assertIsInstance(stmt, ast.Expr)
self.assertIsInstance(stmt.value, ast.Name)
self.assertEqual(stmt.value.id, "a")
stmt = ret.stmts[1]
self.assertIsInstance(stmt, ast.Expr)
self.assertIsInstance(stmt.value, ast.Name)
self.assertEqual(stmt.value.id, "b")
expr = ret.expr
self.assertIsInstance(expr, ast.Name)
self.assertEqual(expr.id, "c")
def test_compiler_yield_return(self):
"""
Check that the compiler correctly generates return statements for
a generator function. In Python versions prior to 3.3, the return
statement in a generator can't take a value, so the final expression
should not generate a return statement. From 3.3 onwards a return
value should be generated.
"""
ret = self.c.compile_function_def(
self._make_expression(HySymbol("fn"),
HyList(),
HyExpression([HySymbol("yield"),
HyInteger(2)]),
HyExpression([HySymbol("+"),
HyInteger(1),
HyInteger(1)])))
self.assertEqual(len(ret.stmts), 1)
stmt = ret.stmts[0]
self.assertIsInstance(stmt, ast.FunctionDef)
body = stmt.body
self.assertEquals(len(body), 2)
self.assertIsInstance(body[0], ast.Expr)
self.assertIsInstance(body[0].value, ast.Yield)
if PY3:
# From 3.3+, the final statement becomes a return value
self.assertIsInstance(body[1], ast.Return)
self.assertIsInstance(body[1].value, ast.BinOp)
else:
# In earlier versions, the expression is not returned
self.assertIsInstance(body[1], ast.Expr)
self.assertIsInstance(body[1].value, ast.BinOp)