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119 lines
3.5 KiB
119 lines
3.5 KiB
# Tests of Starlark 'set'
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# option:set
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# Sets are not a standard part of Starlark, so the features
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# tested in this file must be enabled in the application by setting
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# resolve.AllowSet. (All sets are created by calls to the 'set'
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# built-in or derived from operations on existing sets.)
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# The semantics are subject to change as the spec evolves.
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# TODO(adonovan): support set mutation:
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# - del set[k]
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# - set.remove
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# - set.update
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# - set.clear
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# - set += iterable, perhaps?
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# Test iterator invalidation.
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load("assert.star", "assert")
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# literals
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# Parser does not currently support {1, 2, 3}.
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# TODO(adonovan): add test to syntax/testdata/errors.star.
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# set comprehensions
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# Parser does not currently support {x for x in y}.
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# See syntax/testdata/errors.star.
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# set constructor
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assert.eq(type(set()), "set")
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assert.eq(list(set()), [])
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assert.eq(type(set([1, 3, 2, 3])), "set")
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assert.eq(list(set([1, 3, 2, 3])), [1, 3, 2])
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assert.eq(type(set("hello".elems())), "set")
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assert.eq(list(set("hello".elems())), ["h", "e", "l", "o"])
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assert.eq(list(set(range(3))), [0, 1, 2])
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assert.fails(lambda : set(1), "got int, want iterable")
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assert.fails(lambda : set(1, 2, 3), "got 3 arguments")
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assert.fails(lambda : set([1, 2, {}]), "unhashable type: dict")
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# truth
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assert.true(not set())
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assert.true(set([False]))
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assert.true(set([1, 2, 3]))
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x = set([1, 2, 3])
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y = set([3, 4, 5])
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# set + any is not defined
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assert.fails(lambda : x + y, "unknown.*: set \\+ set")
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# set | set (use resolve.AllowBitwise to enable it)
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assert.eq(list(set("a".elems()) | set("b".elems())), ["a", "b"])
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assert.eq(list(set("ab".elems()) | set("bc".elems())), ["a", "b", "c"])
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assert.fails(lambda : set() | [], "unknown binary op: set | list")
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assert.eq(type(x | y), "set")
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assert.eq(list(x | y), [1, 2, 3, 4, 5])
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assert.eq(list(x | set([5, 1])), [1, 2, 3, 5])
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assert.eq(list(x | set((6, 5, 4))), [1, 2, 3, 6, 5, 4])
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# set.union (allows any iterable for right operand)
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assert.eq(list(set("a".elems()).union("b".elems())), ["a", "b"])
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assert.eq(list(set("ab".elems()).union("bc".elems())), ["a", "b", "c"])
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assert.eq(set().union([]), set())
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assert.eq(type(x.union(y)), "set")
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assert.eq(list(x.union(y)), [1, 2, 3, 4, 5])
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assert.eq(list(x.union([5, 1])), [1, 2, 3, 5])
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assert.eq(list(x.union((6, 5, 4))), [1, 2, 3, 6, 5, 4])
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assert.fails(lambda : x.union([1, 2, {}]), "unhashable type: dict")
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# intersection, set & set (use resolve.AllowBitwise to enable it)
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assert.eq(list(set("a".elems()) & set("b".elems())), [])
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assert.eq(list(set("ab".elems()) & set("bc".elems())), ["b"])
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# symmetric difference, set ^ set (use resolve.AllowBitwise to enable it)
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assert.eq(set([1, 2, 3]) ^ set([4, 5, 3]), set([1, 2, 4, 5]))
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def test_set_augmented_assign():
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x = set([1, 2, 3])
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x &= set([2, 3])
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assert.eq(x, set([2, 3]))
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x |= set([1])
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assert.eq(x, set([1, 2, 3]))
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x ^= set([4, 5, 3])
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assert.eq(x, set([1, 2, 4, 5]))
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test_set_augmented_assign()
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# len
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assert.eq(len(x), 3)
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assert.eq(len(y), 3)
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assert.eq(len(x | y), 5)
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# str
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assert.eq(str(set([1])), "set([1])")
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assert.eq(str(set([2, 3])), "set([2, 3])")
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assert.eq(str(set([3, 2])), "set([3, 2])")
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# comparison
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assert.eq(x, x)
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assert.eq(y, y)
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assert.true(x != y)
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assert.eq(set([1, 2, 3]), set([3, 2, 1]))
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assert.fails(lambda : x < y, "set < set not implemented")
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# iteration
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assert.true(type([elem for elem in x]), "list")
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assert.true(list([elem for elem in x]), [1, 2, 3])
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def iter():
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list = []
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for elem in x:
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list.append(elem)
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return list
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assert.eq(iter(), [1, 2, 3])
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# sets are not indexable
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assert.fails(lambda : x[0], "unhandled.*operation")
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