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63 lines
1.9 KiB
63 lines
1.9 KiB
7 months ago
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# Tests of Starlark 'bool'
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load("assert.star", "assert")
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# truth
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assert.true(True)
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assert.true(not False)
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assert.true(not not True)
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assert.true(not not 1 >= 1)
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# precedence of not
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assert.true(not not 2 > 1)
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# assert.true(not (not 2) > 1) # TODO(adonovan): fix: gives error for False > 1.
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# assert.true(not ((not 2) > 1)) # TODO(adonovan): fix
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# assert.true(not ((not (not 2)) > 1)) # TODO(adonovan): fix
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# assert.true(not not not (2 > 1))
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# bool conversion
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assert.eq(
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[bool(), bool(1), bool(0), bool("hello"), bool("")],
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[False, True, False, True, False],
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)
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# comparison
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assert.true(None == None)
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assert.true(None != False)
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assert.true(None != True)
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assert.eq(1 == 1, True)
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assert.eq(1 == 2, False)
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assert.true(False == False)
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assert.true(True == True)
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# ordered comparison
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assert.true(False < True)
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assert.true(False <= True)
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assert.true(False <= False)
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assert.true(True > False)
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assert.true(True >= False)
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assert.true(True >= True)
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# conditional expression
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assert.eq(1 if 3 > 2 else 0, 1)
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assert.eq(1 if "foo" else 0, 1)
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assert.eq(1 if "" else 0, 0)
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# short-circuit evaluation of 'and' and 'or':
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# 'or' yields the first true operand, or the last if all are false.
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assert.eq(0 or "" or [] or 0, 0)
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assert.eq(0 or "" or [] or 123 or 1 // 0, 123)
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assert.fails(lambda : 0 or "" or [] or 0 or 1 // 0, "division by zero")
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# 'and' yields the first false operand, or the last if all are true.
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assert.eq(1 and "a" and [1] and 123, 123)
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assert.eq(1 and "a" and [1] and 0 and 1 // 0, 0)
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assert.fails(lambda : 1 and "a" and [1] and 123 and 1 // 0, "division by zero")
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# Built-ins that want a bool want an actual bool, not a truth value.
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# See github.com/bazelbuild/starlark/issues/30
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assert.eq(''.splitlines(True), [])
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assert.fails(lambda: ''.splitlines(1), 'got int, want bool')
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assert.fails(lambda: ''.splitlines("hello"), 'got string, want bool')
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assert.fails(lambda: ''.splitlines(0.0), 'got float, want bool')
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