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- import os.path
- import parser
- import pprint
- import sys
-
- from parser import expr, suite, sequence2ast
- from test_support import verbose
-
- #
- # First, we test that we can generate trees from valid source fragments,
- # and that these valid trees are indeed allowed by the tree-loading side
- # of the parser module.
- #
-
- def roundtrip(f, s):
- st1 = f(s)
- t = st1.totuple()
- st2 = parser.sequence2ast(t)
-
- def roundtrip_fromfile(filename):
- roundtrip(suite, open(filename).read())
-
- def test_expr(s):
- print "expr:", s
- roundtrip(expr, s)
-
- def test_suite(s):
- print "suite:", s
- roundtrip(suite, s)
-
-
- print "Expressions:"
-
- test_expr("foo(1)")
- test_expr("[1, 2, 3]")
- test_expr("[x**3 for x in range(20)]")
- test_expr("[x**3 for x in range(20) if x % 3]")
- test_expr("foo(*args)")
- test_expr("foo(*args, **kw)")
- test_expr("foo(**kw)")
- test_expr("foo(key=value)")
- test_expr("foo(key=value, *args)")
- test_expr("foo(key=value, *args, **kw)")
- test_expr("foo(key=value, **kw)")
- test_expr("foo(a, b, c, *args)")
- test_expr("foo(a, b, c, *args, **kw)")
- test_expr("foo(a, b, c, **kw)")
- test_expr("foo + bar")
-
- print
- print "Statements:"
- test_suite("print")
- test_suite("print 1")
- test_suite("print 1,")
- test_suite("print >>fp")
- test_suite("print >>fp, 1")
- test_suite("print >>fp, 1,")
-
- # expr_stmt
- test_suite("a")
- test_suite("a = b")
- test_suite("a = b = c = d = e")
- test_suite("a += b")
- test_suite("a -= b")
- test_suite("a *= b")
- test_suite("a /= b")
- test_suite("a %= b")
- test_suite("a &= b")
- test_suite("a |= b")
- test_suite("a ^= b")
- test_suite("a <<= b")
- test_suite("a >>= b")
- test_suite("a **= b")
-
- #d = os.path.dirname(os.__file__)
- #roundtrip_fromfile(os.path.join(d, "os.py"))
- #roundtrip_fromfile(os.path.join(d, "test", "test_parser.py"))
-
- #
- # Second, we take *invalid* trees and make sure we get ParserError
- # rejections for them.
- #
-
- print
- print "Invalid parse trees:"
-
- def check_bad_tree(tree, label):
- print
- print label
- try:
- sequence2ast(tree)
- except parser.ParserError:
- print "caught expected exception for invalid tree"
- pass
- else:
- print "test failed: did not properly detect invalid tree:"
- pprint.pprint(tree)
-
-
- # not even remotely valid:
- check_bad_tree((1, 2, 3), "<junk>")
-
- # print >>fp,
- tree = \
- (257,
- (264,
- (265,
- (266,
- (268,
- (1, 'print'),
- (35, '>>'),
- (290,
- (291,
- (292,
- (293,
- (295,
- (296,
- (297,
- (298, (299, (300, (301, (302, (303, (1, 'fp')))))))))))))),
- (12, ','))),
- (4, ''))),
- (0, ''))
-
- check_bad_tree(tree, "print >>fp,")
-
- # a,,c
- tree = \
- (258,
- (311,
- (290,
- (291,
- (292,
- (293,
- (295,
- (296, (297, (298, (299, (300, (301, (302, (303, (1, 'a')))))))))))))),
- (12, ','),
- (12, ','),
- (290,
- (291,
- (292,
- (293,
- (295,
- (296, (297, (298, (299, (300, (301, (302, (303, (1, 'c'))))))))))))))),
- (4, ''),
- (0, ''))
-
- check_bad_tree(tree, "a,,c")
-
- # a $= b
- tree = \
- (257,
- (264,
- (265,
- (266,
- (267,
- (312,
- (291,
- (292,
- (293,
- (294,
- (296,
- (297,
- (298,
- (299, (300, (301, (302, (303, (304, (1, 'a'))))))))))))))),
- (268, (37, '$=')),
- (312,
- (291,
- (292,
- (293,
- (294,
- (296,
- (297,
- (298,
- (299, (300, (301, (302, (303, (304, (1, 'b'))))))))))))))))),
- (4, ''))),
- (0, ''))
-
- check_bad_tree(tree, "a $= b")
-