hy/tests/macros/test_macro_processor.py

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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
from hy.errors import HyMacroExpansionError
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from hy.compiler import HyASTCompiler
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@macro("test")
def tmac(*tree):
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""" Turn an expression into a list """
return HyList(tree)
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def test_preprocessor_simple():
""" Test basic macro expansion """
obj = macroexpand(tokenize('(test "one" "two")')[0],
HyASTCompiler(__name__))
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assert obj == HyList(["one", "two"])
assert type(obj) == HyList
def test_preprocessor_expression():
""" Test that macro expansion doesn't recurse"""
obj = macroexpand(tokenize('(test (test "one" "two"))')[0],
HyASTCompiler(__name__))
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assert type(obj) == HyList
assert type(obj[0]) == HyExpression
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assert obj[0] == HyExpression([HySymbol("test"),
HyString("one"),
HyString("two")])
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obj = HyList([HyString("one"), HyString("two")])
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obj = tokenize('(shill ["one" "two"])')[0][1]
assert obj == macroexpand(obj, HyASTCompiler(""))
def test_preprocessor_exceptions():
""" Test that macro expansion raises appropriate exceptions"""
try:
macroexpand(tokenize('(defn)')[0], HyASTCompiler(__name__))
assert False
except HyMacroExpansionError as e:
assert "_hy_anon_fn_" not in str(e)
assert "TypeError" not in str(e)