64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
# Copyright 2018 the authors.
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# This file is part of Hy, which is free software licensed under the Expat
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# license. See the LICENSE.
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from hy.macros import macro, macroexpand
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from hy.lex import tokenize
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from hy.models import HyString, HyList, HySymbol, HyExpression, HyFloat
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from hy.errors import HyMacroExpansionError
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from hy.compiler import HyASTCompiler
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import pytest
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@macro("test")
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def tmac(ETname, *tree):
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""" Turn an expression into a list """
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return HyList(tree)
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def test_preprocessor_simple():
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""" Test basic macro expansion """
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obj = macroexpand(tokenize('(test "one" "two")')[0],
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__name__,
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HyASTCompiler(__name__))
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assert obj == HyList(["one", "two"])
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assert type(obj) == HyList
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def test_preprocessor_expression():
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""" Test that macro expansion doesn't recurse"""
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obj = macroexpand(tokenize('(test (test "one" "two"))')[0],
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__name__,
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HyASTCompiler(__name__))
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assert type(obj) == HyList
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assert type(obj[0]) == HyExpression
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assert obj[0] == HyExpression([HySymbol("test"),
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HyString("one"),
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HyString("two")])
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obj = HyList([HyString("one"), HyString("two")])
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obj = tokenize('(shill ["one" "two"])')[0][1]
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assert obj == macroexpand(obj, __name__, HyASTCompiler(__name__))
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def test_preprocessor_exceptions():
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""" Test that macro expansion raises appropriate exceptions"""
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with pytest.raises(HyMacroExpansionError) as excinfo:
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macroexpand(tokenize('(defn)')[0], __name__, HyASTCompiler(__name__))
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assert "_hy_anon_fn_" not in excinfo.value.message
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assert "TypeError" not in excinfo.value.message
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def test_macroexpand_nan():
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# https://github.com/hylang/hy/issues/1574
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import math
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NaN = float('nan')
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x = macroexpand(HyFloat(NaN), __name__, HyASTCompiler(__name__))
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assert type(x) is HyFloat
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assert math.isnan(x)
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