hy/tests/compilers/test_ast.py

# Copyright (c) 2012 Paul Tagliamonte <paultag@debian.org>
#
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# to deal in the Software without restriction, including without limitation
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# 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:
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# The above copyright notice and this permission notice shall be included in
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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from hy.compiler import hy_compile, HyCompileError
from hy.lex import tokenize
import ast


def _ast_spotcheck(arg, root, secondary):
    if "." in arg:
        local, full = arg.split(".", 1)
        return _ast_spotcheck(full,
                              getattr(root, local),
                              getattr(secondary, local))
    assert getattr(root, arg) == getattr(secondary, arg)


def test_ast_bad_type():
    "Make sure AST breakage can happen"
    try:
        hy_compile("foo")
        assert True == False
    except HyCompileError:
        pass


def test_ast_expression_basics():
    """ Ensure basic AST expression conversion works. """
    code = hy_compile(tokenize("(foo bar)")).body[0]
    tree = ast.Expr(value=ast.Call(
            func=ast.Name(
                id="foo",
                ctx=ast.Load(),
            ),
            args=[
                ast.Name(id="bar", ctx=ast.Load())
            ],
            keywords=[],
            starargs=None,
            kwargs=None,
        ))

    _ast_spotcheck("value.func.id", code, tree)


def test_ast_anon_fns_basics():
    """ Ensure anon fns work. """
    code = hy_compile(tokenize("(fn (x) (* x x))")).body[0]
    assert type(code) == ast.FunctionDef