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Update the parser module to support augmented assignment.

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Add some test cases.
This commit is contained in:
Fred Drake 2000-08-25 22:42:40 +00:00
parent 6ef68b5b01
commit 28f739aad4
3 changed files with 152 additions and 49 deletions
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106
Lib/test/test_parser.py
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@ -1,3 +1,4 @@
import os.path
import parser
import pprint
import sys
@ -12,38 +13,68 @@ from test_support import verbose
#
def roundtrip(f, s):
print 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:"
roundtrip(expr, "foo(1)")
roundtrip(expr, "[1, 2, 3]")
roundtrip(expr, "[x**3 for x in range(20)]")
roundtrip(expr, "[x**3 for x in range(20) if x % 3]")
roundtrip(expr, "foo(*args)")
roundtrip(expr, "foo(*args, **kw)")
roundtrip(expr, "foo(**kw)")
roundtrip(expr, "foo(key=value)")
roundtrip(expr, "foo(key=value, *args)")
roundtrip(expr, "foo(key=value, *args, **kw)")
roundtrip(expr, "foo(key=value, **kw)")
roundtrip(expr, "foo(a, b, c, *args)")
roundtrip(expr, "foo(a, b, c, *args, **kw)")
roundtrip(expr, "foo(a, b, c, **kw)")
roundtrip(expr, "foo + bar")
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:"
roundtrip(suite, "print")
roundtrip(suite, "print 1")
roundtrip(suite, "print 1,")
roundtrip(suite, "print >>fp")
roundtrip(suite, "print >>fp, 1")
roundtrip(suite, "print >>fp, 1,")
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
@ -114,3 +145,34 @@ tree = \
(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")