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226 lines
8.0 KiB
226 lines
8.0 KiB
# Tests of Starlark built-in functions
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# option:set
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load("assert.star", "assert")
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# len
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assert.eq(len([1, 2, 3]), 3)
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assert.eq(len((1, 2, 3)), 3)
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assert.eq(len({1: 2}), 1)
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assert.fails(lambda: len(1), "int.*has no len")
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# and, or
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assert.eq(123 or "foo", 123)
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assert.eq(0 or "foo", "foo")
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assert.eq(123 and "foo", "foo")
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assert.eq(0 and "foo", 0)
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none = None
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_1 = none and none[0] # rhs is not evaluated
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_2 = (not none) or none[0] # rhs is not evaluated
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# any, all
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assert.true(all([]))
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assert.true(all([1, True, "foo"]))
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assert.true(not all([1, True, ""]))
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assert.true(not any([]))
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assert.true(any([0, False, "foo"]))
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assert.true(not any([0, False, ""]))
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# in
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assert.true(3 in [1, 2, 3])
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assert.true(4 not in [1, 2, 3])
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assert.true(3 in (1, 2, 3))
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assert.true(4 not in (1, 2, 3))
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assert.fails(lambda: 3 in "foo", "in.*requires string as left operand")
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assert.true(123 in {123: ""})
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assert.true(456 not in {123:""})
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assert.true([] not in {123: ""})
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# sorted
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assert.eq(sorted([42, 123, 3]), [3, 42, 123])
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assert.eq(sorted([42, 123, 3], reverse=True), [123, 42, 3])
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assert.eq(sorted(["wiz", "foo", "bar"]), ["bar", "foo", "wiz"])
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assert.eq(sorted(["wiz", "foo", "bar"], reverse=True), ["wiz", "foo", "bar"])
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assert.fails(lambda: sorted([1, 2, None, 3]), "int < NoneType not implemented")
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assert.fails(lambda: sorted([1, "one"]), "string < int not implemented")
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# custom key function
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assert.eq(sorted(["two", "three", "four"], key=len),
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["two", "four", "three"])
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assert.eq(sorted(["two", "three", "four"], key=len, reverse=True),
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["three", "four", "two"])
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assert.fails(lambda: sorted([1, 2, 3], key=None), "got NoneType, want callable")
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# sort is stable
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pairs = [(4, 0), (3, 1), (4, 2), (2, 3), (3, 4), (1, 5), (2, 6), (3, 7)]
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assert.eq(sorted(pairs, key=lambda x: x[0]),
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[(1, 5),
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(2, 3), (2, 6),
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(3, 1), (3, 4), (3, 7),
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(4, 0), (4, 2)])
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assert.fails(lambda: sorted(1), 'sorted: for parameter iterable: got int, want iterable')
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# reversed
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assert.eq(reversed([1, 144, 81, 16]), [16, 81, 144, 1])
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# set
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assert.contains(set([1, 2, 3]), 1)
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assert.true(4 not in set([1, 2, 3]))
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assert.eq(len(set([1, 2, 3])), 3)
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assert.eq(sorted([x for x in set([1, 2, 3])]), [1, 2, 3])
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# dict
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assert.eq(dict([(1, 2), (3, 4)]), {1: 2, 3: 4})
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assert.eq(dict([(1, 2), (3, 4)], foo="bar"), {1: 2, 3: 4, "foo": "bar"})
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assert.eq(dict({1:2, 3:4}), {1: 2, 3: 4})
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assert.eq(dict({1:2, 3:4}.items()), {1: 2, 3: 4})
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# range
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assert.eq("range", type(range(10)))
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assert.eq("range(10)", str(range(0, 10, 1)))
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assert.eq("range(1, 10)", str(range(1, 10)))
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assert.eq(range(0, 5, 10), range(0, 5, 11))
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assert.eq("range(0, 10, -1)", str(range(0, 10, -1)))
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assert.fails(lambda: {range(10): 10}, "unhashable: range")
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assert.true(bool(range(1, 2)))
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assert.true(not(range(2, 1))) # an empty range is false
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assert.eq([x*x for x in range(5)], [0, 1, 4, 9, 16])
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assert.eq(list(range(5)), [0, 1, 2, 3, 4])
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assert.eq(list(range(-5)), [])
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assert.eq(list(range(2, 5)), [2, 3, 4])
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assert.eq(list(range(5, 2)), [])
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assert.eq(list(range(-2, -5)), [])
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assert.eq(list(range(-5, -2)), [-5, -4, -3])
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assert.eq(list(range(2, 10, 3)), [2, 5, 8])
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assert.eq(list(range(10, 2, -3)), [10, 7, 4])
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assert.eq(list(range(-2, -10, -3)), [-2, -5, -8])
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assert.eq(list(range(-10, -2, 3)), [-10, -7, -4])
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assert.eq(list(range(10, 2, -1)), [10, 9, 8, 7, 6, 5, 4, 3])
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assert.eq(list(range(5)[1:]), [1, 2, 3, 4])
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assert.eq(len(range(5)[1:]), 4)
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assert.eq(list(range(5)[:2]), [0, 1])
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assert.eq(list(range(10)[1:]), [1, 2, 3, 4, 5, 6, 7, 8, 9])
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assert.eq(list(range(10)[1:9:2]), [1, 3, 5, 7])
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assert.eq(list(range(10)[1:10:2]), [1, 3, 5, 7, 9])
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assert.eq(list(range(10)[1:11:2]), [1, 3, 5, 7, 9])
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assert.eq(list(range(10)[::-2]), [9, 7, 5, 3, 1])
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assert.eq(list(range(0, 10, 2)[::2]), [0, 4, 8])
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assert.eq(list(range(0, 10, 2)[::-2]), [8, 4, 0])
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# range() is limited by the width of the Go int type (int32 or int64).
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assert.fails(lambda: range(1<<64), "... out of range .want value in signed ..-bit range")
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assert.eq(len(range(0x7fffffff)), 0x7fffffff) # O(1)
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# Two ranges compare equal if they denote the same sequence:
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assert.eq(range(0), range(2, 1, 3)) # []
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assert.eq(range(0, 3, 2), range(0, 4, 2)) # [0, 2]
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assert.ne(range(1, 10), range(2, 10))
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assert.fails(lambda: range(0) < range(0), "range < range not implemented")
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# <number> in <range>
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assert.contains(range(3), 1)
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assert.contains(range(3), 2.0) # acts like 2
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assert.fails(lambda: True in range(3), "requires integer.*not bool") # bools aren't numbers
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assert.fails(lambda: "one" in range(10), "requires integer.*not string")
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assert.true(4 not in range(4))
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assert.true(1e15 not in range(4)) # too big for int32
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assert.true(1e100 not in range(4)) # too big for int64
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# https://github.com/google/starlark-go/issues/116
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assert.fails(lambda: range(0, 0, 2)[:][0], "index 0 out of range: empty range")
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# list
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assert.eq(list("abc".elems()), ["a", "b", "c"])
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assert.eq(sorted(list({"a": 1, "b": 2})), ['a', 'b'])
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# min, max
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assert.eq(min(5, -2, 1, 7, 3), -2)
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assert.eq(max(5, -2, 1, 7, 3), 7)
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assert.eq(min([5, -2, 1, 7, 3]), -2)
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assert.eq(min("one", "two", "three", "four"), "four")
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assert.eq(max("one", "two", "three", "four"), "two")
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assert.fails(min, "min requires at least one positional argument")
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assert.fails(lambda: min(1), "not iterable")
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assert.fails(lambda: min([]), "empty")
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assert.eq(min(5, -2, 1, 7, 3, key=lambda x: x*x), 1) # min absolute value
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assert.eq(min(5, -2, 1, 7, 3, key=lambda x: -x), 7) # min negated value
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# enumerate
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assert.eq(enumerate("abc".elems()), [(0, "a"), (1, "b"), (2, "c")])
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assert.eq(enumerate([False, True, None], 42), [(42, False), (43, True), (44, None)])
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# zip
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assert.eq(zip(), [])
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assert.eq(zip([]), [])
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assert.eq(zip([1, 2, 3]), [(1,), (2,), (3,)])
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assert.eq(zip("".elems()), [])
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assert.eq(zip("abc".elems(),
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list("def".elems()),
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"hijk".elems()),
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[("a", "d", "h"), ("b", "e", "i"), ("c", "f", "j")])
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z1 = [1]
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assert.eq(zip(z1), [(1,)])
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z1.append(2)
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assert.eq(zip(z1), [(1,), (2,)])
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assert.fails(lambda: zip(z1, 1), "zip: argument #2 is not iterable: int")
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z1.append(3)
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# dir for builtin_function_or_method
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assert.eq(dir(None), [])
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assert.eq(dir({})[:3], ["clear", "get", "items"]) # etc
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assert.eq(dir(1), [])
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assert.eq(dir([])[:3], ["append", "clear", "extend"]) # etc
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# hasattr, getattr, dir
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# hasfields is an application-defined type defined in eval_test.go.
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hf = hasfields()
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assert.eq(dir(hf), [])
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assert.true(not hasattr(hf, "x"))
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assert.fails(lambda: getattr(hf, "x"), "no .x field or method")
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assert.eq(getattr(hf, "x", 42), 42)
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hf.x = 1
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assert.true(hasattr(hf, "x"))
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assert.eq(getattr(hf, "x"), 1)
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assert.eq(hf.x, 1)
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hf.x = 2
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assert.eq(getattr(hf, "x"), 2)
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assert.eq(hf.x, 2)
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# built-in types can have attributes (methods) too.
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myset = set([])
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assert.eq(dir(myset), ["union"])
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assert.true(hasattr(myset, "union"))
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assert.true(not hasattr(myset, "onion"))
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assert.eq(str(getattr(myset, "union")), "<built-in method union of set value>")
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assert.fails(lambda: getattr(myset, "onion"), "no .onion field or method")
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assert.eq(getattr(myset, "onion", 42), 42)
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# dir returns a new, sorted, mutable list
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assert.eq(sorted(dir("")), dir("")) # sorted
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dir("").append("!") # mutable
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assert.true("!" not in dir("")) # new
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# error messages should suggest spelling corrections
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hf.one = 1
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hf.two = 2
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hf.three = 3
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hf.forty_five = 45
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assert.fails(lambda: hf.One, 'no .One field.*did you mean .one')
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assert.fails(lambda: hf.oone, 'no .oone field.*did you mean .one')
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assert.fails(lambda: hf.FortyFive, 'no .FortyFive field.*did you mean .forty_five')
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assert.fails(lambda: hf.trhee, 'no .trhee field.*did you mean .three')
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assert.fails(lambda: hf.thirty, 'no .thirty field or method$') # no suggestion
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# spell check in setfield too
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def setfield(): hf.noForty_Five = 46 # "no" prefix => SetField returns NoSuchField
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assert.fails(setfield, 'no .noForty_Five field.*did you mean .forty_five')
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# repr
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assert.eq(repr(1), "1")
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assert.eq(repr("x"), '"x"')
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assert.eq(repr(["x", 1]), '["x", 1]')
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# fail
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---
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fail() ### `fail: $`
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x = 1//0 # unreachable
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---
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fail(1) ### `fail: 1`
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---
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fail(1, 2, 3) ### `fail: 1 2 3`
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---
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fail(1, 2, 3, sep="/") ### `fail: 1/2/3`
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