124 lines
2.7 KiB
Python
124 lines
2.7 KiB
Python
# test syntax errors
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def test_syntax(code):
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try:
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exec(code)
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print("no SyntaxError")
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except IndentationError:
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print("IndentationError")
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except SyntaxError:
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print("SyntaxError")
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# non-newline after line-continuation character (lexer error)
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test_syntax("a \\a\n")
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# dedent mismatch (lexer error)
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test_syntax("def f():\n a\n a\n")
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# unclosed string (lexer error)
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test_syntax("'abc")
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# invalid (lexer error)
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test_syntax("!")
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test_syntax("$")
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test_syntax("`")
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# bad indentation (lexer error)
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test_syntax(" a\n")
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# malformed integer literal (parser error)
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test_syntax("123z")
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# can't assign to literals
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test_syntax("1 = 2")
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test_syntax("'' = 1")
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test_syntax("{} = 1")
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# can't assign to comprehension
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test_syntax("(i for i in a) = 1")
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# can't assign to function
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test_syntax("f() = 1")
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# can't assign to power
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test_syntax("f**2 = 1")
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# can't assign to power of composite
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test_syntax("f[0]**2 = 1")
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# can't assign to empty tuple
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test_syntax("() = 1")
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# can't have multiple *x on LHS
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test_syntax("*a, *b = c")
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# can't do augmented assignment to tuple
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test_syntax("a, b += c")
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test_syntax("(a, b) += c")
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# can't do augmented assignment to list
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test_syntax("[a, b] += c")
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# non-default argument can't follow default argument
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test_syntax("def f(a=1, b): pass")
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# can't delete these things
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test_syntax("del ()")
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test_syntax("del f()")
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test_syntax("del f[0]**2")
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test_syntax("del (a for a in a)")
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# must be in a "loop"
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test_syntax("break")
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test_syntax("continue")
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# must be in a function
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test_syntax("return")
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test_syntax("yield")
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test_syntax("nonlocal a")
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# error on uPy, warning on CPy
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#test_syntax("def f():\n a = 1\n global a")
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# default except must be last
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test_syntax("try:\n a\nexcept:\n pass\nexcept:\n pass")
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# LHS of keywords must be id's
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test_syntax("f(1=2)")
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# non-keyword after keyword
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test_syntax("f(a=1, 2)")
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# doesn't error on uPy but should
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#test_syntax("f(1, i for i in i)")
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# all elements of dict/set must be pairs or singles
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test_syntax("{1:2, 3}")
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test_syntax("{1, 2:3}")
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# can't mix non-bytes with bytes when concatenating
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test_syntax("'abc' b'def'")
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# can't reuse same name for argument
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test_syntax("def f(a, a): pass")
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# nonlocal must exist in outer function/class scope
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test_syntax("def f():\n def g():\n nonlocal a")
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# param can't be redefined as global
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test_syntax('def f(x):\n global x')
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# param can't be redefined as nonlocal
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test_syntax('def f(x):\n nonlocal x')
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# can define variable to be both nonlocal and global
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test_syntax('def f():\n nonlocal x\n global x')
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# can't have multiple *'s
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test_syntax('def f(x, *a, *):\n pass')
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test_syntax('lambda x, *a, *: 1')
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# **kw must be last
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test_syntax('def f(x, *a, **kw, r):\n pass')
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test_syntax('lambda x, *a, **kw, r: 1')
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