test_assignment.rb [plain text]
require 'test/unit'
class TestAssignment < Test::Unit::TestCase
def test_assign
a=[]; a[0] ||= "bar";
assert_equal("bar", a[0])
h={}; h["foo"] ||= "bar";
assert_equal("bar", h["foo"])
aa = 5
aa ||= 25
assert_equal(5, aa)
bb ||= 25
assert_equal(25, bb)
cc &&=33
assert_nil(cc)
cc = 5
cc &&=44
assert_equal(44, cc)
a = nil; assert_nil(a)
a = 1; assert_equal(1, a)
a = []; assert_equal([], a)
a = [1]; assert_equal([1], a)
a = [nil]; assert_equal([nil], a)
a = [[]]; assert_equal([[]], a)
a = [1,2]; assert_equal([1,2], a)
a = [*[]]; assert_equal([], a)
a = [*[1]]; assert_equal([1], a)
a = [*[1,2]]; assert_equal([1,2], a)
a = *[]; assert_equal([], a)
a = *[1]; assert_equal([1], a)
a = *[nil]; assert_equal([nil], a)
a = *[[]]; assert_equal([[]], a)
a = *[1,2]; assert_equal([1,2], a)
a = *[*[]]; assert_equal([], a)
a = *[*[1]]; assert_equal([1], a)
a = *[*[1,2]]; assert_equal([1,2], a)
*a = nil; assert_equal([nil], a)
*a = 1; assert_equal([1], a)
*a = []; assert_equal([], a)
*a = [1]; assert_equal([1], a)
*a = [nil]; assert_equal([nil], a)
*a = [[]]; assert_equal([[]], a)
*a = [1,2]; assert_equal([1,2], a)
*a = [*[]]; assert_equal([], a)
*a = [*[1]]; assert_equal([1], a)
*a = [*[1,2]]; assert_equal([1,2], a)
*a = *[]; assert_equal([], a)
*a = *[1]; assert_equal([1], a)
*a = *[nil]; assert_equal([nil], a)
*a = *[[]]; assert_equal([[]], a)
*a = *[1,2]; assert_equal([1,2], a)
*a = *[*[]]; assert_equal([], a)
*a = *[*[1]]; assert_equal([1], a)
*a = *[*[1,2]]; assert_equal([1,2], a)
a,b,*c = nil; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = 1; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = []; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = [1]; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = [nil]; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = [[]]; assert_equal([[],nil,[]], [a,b,c])
a,b,*c = [1,2]; assert_equal([1,2,[]], [a,b,c])
a,b,*c = [*[]]; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = [*[1]]; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = [*[1,2]]; assert_equal([1,2,[]], [a,b,c])
a,b,*c = *[]; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = *[1]; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = *[nil]; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = *[[]]; assert_equal([[],nil,[]], [a,b,c])
a,b,*c = *[1,2]; assert_equal([1,2,[]], [a,b,c])
a,b,*c = *[*[]]; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = *[*[1]]; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = *[*[1,2]]; assert_equal([1,2,[]], [a,b,c])
bug2050 = '[ruby-core:25629]'
a = Hash.new {[]}
b = [1, 2]
assert_equal([1, 2, 3], a[:x] += [*b, 3], bug2050)
assert_equal([1, 2, 3], a[:x], bug2050)
assert_equal([1, 2, 3, [1, 2, 3]], a[:x] <<= [*b, 3], bug2050)
assert_equal([1, 2, 3, [1, 2, 3]], a[:x], bug2050)
end
def test_yield
def f; yield(nil); end; f {|a| assert_nil(a)}; undef f
def f; yield(1); end; f {|a| assert_equal(1, a)}; undef f
def f; yield([]); end; f {|a| assert_equal([], a)}; undef f
def f; yield([1]); end; f {|a| assert_equal([1], a)}; undef f
def f; yield([nil]); end; f {|a| assert_equal([nil], a)}; undef f
def f; yield([[]]); end; f {|a| assert_equal([[]], a)}; undef f
def f; yield([*[]]); end; f {|a| assert_equal([], a)}; undef f
def f; yield([*[1]]); end; f {|a| assert_equal([1], a)}; undef f
def f; yield([*[1,2]]); end; f {|a| assert_equal([1,2], a)}; undef f
def f; yield(*[1]); end; f {|a| assert_equal(1, a)}; undef f
def f; yield(*[nil]); end; f {|a| assert_equal(nil, a)}; undef f
def f; yield(*[[]]); end; f {|a| assert_equal([], a)}; undef f
def f; yield(*[*[1]]); end; f {|a| assert_equal(1, a)}; undef f
def f; yield; end; f {|*a| assert_equal([], a)}; undef f
def f; yield(nil); end; f {|*a| assert_equal([nil], a)}; undef f
def f; yield(1); end; f {|*a| assert_equal([1], a)}; undef f
def f; yield([]); end; f {|*a| assert_equal([[]], a)}; undef f
def f; yield([1]); end; f {|*a| assert_equal([[1]], a)}; undef f
def f; yield([nil]); end; f {|*a| assert_equal([[nil]], a)}; undef f
def f; yield([[]]); end; f {|*a| assert_equal([[[]]], a)}; undef f
def f; yield([1,2]); end; f {|*a| assert_equal([[1,2]], a)}; undef f
def f; yield([*[]]); end; f {|*a| assert_equal([[]], a)}; undef f
def f; yield([*[1]]); end; f {|*a| assert_equal([[1]], a)}; undef f
def f; yield([*[1,2]]); end; f {|*a| assert_equal([[1,2]], a)}; undef f
def f; yield(*[]); end; f {|*a| assert_equal([], a)}; undef f
def f; yield(*[1]); end; f {|*a| assert_equal([1], a)}; undef f
def f; yield(*[nil]); end; f {|*a| assert_equal([nil], a)}; undef f
def f; yield(*[[]]); end; f {|*a| assert_equal([[]], a)}; undef f
def f; yield(*[*[]]); end; f {|*a| assert_equal([], a)}; undef f
def f; yield(*[*[1]]); end; f {|*a| assert_equal([1], a)}; undef f
def f; yield(*[*[1,2]]); end; f {|*a| assert_equal([1,2], a)}; undef f
def f; yield; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}; undef f
def f; yield(nil); end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}; undef f
def f; yield(1); end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}; undef f
def f; yield([]); end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}; undef f
def f; yield([1]); end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}; undef f
def f; yield([nil]); end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}; undef f
def f; yield([[]]); end; f {|a,b,*c| assert_equal([[],nil,[]], [a,b,c])}; undef f
def f; yield([*[]]); end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}; undef f
def f; yield([*[1]]); end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}; undef f
def f; yield([*[1,2]]); end; f {|a,b,*c| assert_equal([1,2,[]], [a,b,c])}; undef f
def f; yield(*[]); end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}; undef f
def f; yield(*[1]); end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}; undef f
def f; yield(*[nil]); end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}; undef f
def f; yield(*[[]]); end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}; undef f
def f; yield(*[*[]]); end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}; undef f
def f; yield(*[*[1]]); end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}; undef f
def f; yield(*[*[1,2]]); end; f {|a,b,*c| assert_equal([1,2,[]], [a,b,c])}; undef f
end
def test_return
def r; return; end; a = r(); assert_nil(a); undef r
def r; return nil; end; a = r(); assert_nil(a); undef r
def r; return 1; end; a = r(); assert_equal(1, a); undef r
def r; return []; end; a = r(); assert_equal([], a); undef r
def r; return [1]; end; a = r(); assert_equal([1], a); undef r
def r; return [nil]; end; a = r(); assert_equal([nil], a); undef r
def r; return [[]]; end; a = r(); assert_equal([[]], a); undef r
def r; return [*[]]; end; a = r(); assert_equal([], a); undef r
def r; return [*[1]]; end; a = r(); assert_equal([1], a); undef r
def r; return [*[1,2]]; end; a = r(); assert_equal([1,2], a); undef r
def r; return *[]; end; a = r(); assert_equal([], a); undef r
def r; return *[1]; end; a = r(); assert_equal([1], a); undef r
def r; return *[nil]; end; a = r(); assert_equal([nil], a); undef r
def r; return *[[]]; end; a = r(); assert_equal([[]], a); undef r
def r; return *[*[]]; end; a = r(); assert_equal([], a); undef r
def r; return *[*[1]]; end; a = r(); assert_equal([1], a); undef r
def r; return *[*[1,2]]; end; a = r(); assert_equal([1,2], a); undef r
def r; return *[[]]; end; a = *r(); assert_equal([[]], a); undef r
def r; return *[*[1,2]]; end; a = *r(); assert_equal([1,2], a); undef r
def r; return; end; *a = r(); assert_equal([nil], a); undef r
def r; return nil; end; *a = r(); assert_equal([nil], a); undef r
def r; return 1; end; *a = r(); assert_equal([1], a); undef r
def r; return []; end; *a = r(); assert_equal([], a); undef r
def r; return [1]; end; *a = r(); assert_equal([1], a); undef r
def r; return [nil]; end; *a = r(); assert_equal([nil], a); undef r
def r; return [[]]; end; *a = r(); assert_equal([[]], a); undef r
def r; return [1,2]; end; *a = r(); assert_equal([1,2], a); undef r
def r; return [*[]]; end; *a = r(); assert_equal([], a); undef r
def r; return [*[1]]; end; *a = r(); assert_equal([1], a); undef r
def r; return [*[1,2]]; end; *a = r(); assert_equal([1,2], a); undef r
def r; return *[]; end; *a = r(); assert_equal([], a); undef r
def r; return *[1]; end; *a = r(); assert_equal([1], a); undef r
def r; return *[nil]; end; *a = r(); assert_equal([nil], a); undef r
def r; return *[[]]; end; *a = r(); assert_equal([[]], a); undef r
def r; return *[1,2]; end; *a = r(); assert_equal([1,2], a); undef r
def r; return *[*[]]; end; *a = r(); assert_equal([], a); undef r
def r; return *[*[1]]; end; *a = r(); assert_equal([1], a); undef r
def r; return *[*[1,2]]; end; *a = r(); assert_equal([1,2], a); undef r
def r; return *[[]]; end; *a = *r(); assert_equal([[]], a); undef r
def r; return *[1,2]; end; *a = *r(); assert_equal([1,2], a); undef r
def r; return *[*[1,2]]; end; *a = *r(); assert_equal([1,2], a); undef r
def r; return; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c]); undef r
def r; return nil; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c]); undef r
def r; return 1; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c]); undef r
def r; return []; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c]); undef r
def r; return [1]; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c]); undef r
def r; return [nil]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c]); undef r
def r; return [[]]; end; a,b,*c = r(); assert_equal([[],nil,[]], [a,b,c]); undef r
def r; return [1,2]; end; a,b,*c = r(); assert_equal([1,2,[]], [a,b,c]); undef r
def r; return [*[]]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c]); undef r
def r; return [*[1]]; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c]); undef r
def r; return [*[1,2]]; end; a,b,*c = r(); assert_equal([1,2,[]], [a,b,c]); undef r
def r; return *[]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c]); undef r
def r; return *[1]; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c]); undef r
def r; return *[nil]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c]); undef r
def r; return *[[]]; end; a,b,*c = r(); assert_equal([[],nil,[]], [a,b,c]); undef r
def r; return *[1,2]; end; a,b,*c = r(); assert_equal([1,2,[]], [a,b,c]); undef r
def r; return *[*[]]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c]); undef r
def r; return *[*[1]]; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c]); undef r
def r; return *[*[1,2]]; end; a,b,*c = r(); assert_equal([1,2,[]], [a,b,c]); undef r
def r; return 1, *[]; end; a,b = r(); assert_equal([1,nil], [a,b]); undef r
def r; return 1,2,*[1]; end; a,b = r(); assert_equal([1,2], [a,b]); undef r
def r; return 1,2,3,*[1,2]; end; a,b = r(); assert_equal([1,2], [a,b]); undef r
end
def test_lambda
f = lambda {|r,| assert_equal([], r)}
f.call([], *[])
f = lambda {|r,*l| assert_equal([], r); assert_equal([1], l)}
f.call([], *[1])
f = lambda{|x| x}
assert_equal(42, f.call(42))
assert_equal([42], f.call([42]))
assert_equal([[42]], f.call([[42]]))
assert_equal([42,55], f.call([42,55]))
f = lambda{|x,| x}
assert_equal(42, f.call(42))
assert_equal([42], f.call([42]))
assert_equal([[42]], f.call([[42]]))
assert_equal([42,55], f.call([42,55]))
f = lambda{|*x| x}
assert_equal([42], f.call(42))
assert_equal([[42]], f.call([42]))
assert_equal([[[42]]], f.call([[42]]))
assert_equal([[42,55]], f.call([42,55]))
assert_equal([42,55], f.call(42,55))
end
def test_multi
a,=*[1]
assert_equal(1, a)
a,=*[[1]]
assert_equal([1], a)
a,=*[[[1]]]
assert_equal([[1]], a)
x, (y, z) = 1, 2, 3
assert_equal([1,2,nil], [x,y,z])
x, (y, z) = 1, [2,3]
assert_equal([1,2,3], [x,y,z])
x, (y, z) = 1, [2]
assert_equal([1,2,nil], [x,y,z])
end
def test_break
a = loop do break; end; assert_nil(a)
a = loop do break nil; end; assert_nil(a)
a = loop do break 1; end; assert_equal(1, a)
a = loop do break []; end; assert_equal([], a)
a = loop do break [1]; end; assert_equal([1], a)
a = loop do break [nil]; end; assert_equal([nil], a)
a = loop do break [[]]; end; assert_equal([[]], a)
a = loop do break [*[]]; end; assert_equal([], a)
a = loop do break [*[1]]; end; assert_equal([1], a)
a = loop do break [*[1,2]]; end; assert_equal([1,2], a)
a = loop do break *[]; end; assert_equal([], a)
a = loop do break *[1]; end; assert_equal([1], a)
a = loop do break *[nil]; end; assert_equal([nil], a)
a = loop do break *[[]]; end; assert_equal([[]], a)
a = loop do break *[*[]]; end; assert_equal([], a)
a = loop do break *[*[1]]; end; assert_equal([1], a)
a = loop do break *[*[1,2]]; end; assert_equal([1,2], a)
*a = loop do break; end; assert_equal([nil], a)
*a = loop do break nil; end; assert_equal([nil], a)
*a = loop do break 1; end; assert_equal([1], a)
*a = loop do break []; end; assert_equal([], a)
*a = loop do break [1]; end; assert_equal([1], a)
*a = loop do break [nil]; end; assert_equal([nil], a)
*a = loop do break [[]]; end; assert_equal([[]], a)
*a = loop do break [1,2]; end; assert_equal([1,2], a)
*a = loop do break [*[]]; end; assert_equal([], a)
*a = loop do break [*[1]]; end; assert_equal([1], a)
*a = loop do break [*[1,2]]; end; assert_equal([1,2], a)
*a = loop do break *[]; end; assert_equal([], a)
*a = loop do break *[1]; end; assert_equal([1], a)
*a = loop do break *[nil]; end; assert_equal([nil], a)
*a = loop do break *[[]]; end; assert_equal([[]], a)
*a = loop do break *[1,2]; end; assert_equal([1,2], a)
*a = loop do break *[*[]]; end; assert_equal([], a)
*a = loop do break *[*[1]]; end; assert_equal([1], a)
*a = loop do break *[*[1,2]]; end; assert_equal([1,2], a)
*a = *loop do break *[[]]; end; assert_equal([[]], a)
*a = *loop do break *[1,2]; end; assert_equal([1,2], a)
*a = *loop do break *[*[1,2]]; end; assert_equal([1,2], a)
a,b,*c = loop do break; end; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = loop do break nil; end; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = loop do break 1; end; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = loop do break []; end; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = loop do break [1]; end; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = loop do break [nil]; end; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = loop do break [[]]; end; assert_equal([[],nil,[]], [a,b,c])
a,b,*c = loop do break [1,2]; end; assert_equal([1,2,[]], [a,b,c])
a,b,*c = loop do break [*[]]; end; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = loop do break [*[1]]; end; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = loop do break [*[1,2]]; end; assert_equal([1,2,[]], [a,b,c])
a,b,*c = loop do break *[]; end; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = loop do break *[1]; end; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = loop do break *[nil]; end; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = loop do break *[[]]; end; assert_equal([[],nil,[]], [a,b,c])
a,b,*c = loop do break *[1,2]; end; assert_equal([1,2,[]], [a,b,c])
a,b,*c = loop do break *[*[]]; end; assert_equal([nil,nil,[]], [a,b,c])
a,b,*c = loop do break *[*[1]]; end; assert_equal([1,nil,[]], [a,b,c])
a,b,*c = loop do break *[*[1,2]]; end; assert_equal([1,2,[]], [a,b,c])
end
def test_next
def r(val); a = yield(); assert_equal(val, a); end
r(nil){next}
r(nil){next nil}
r(1){next 1}
r([]){next []}
r([1]){next [1]}
r([nil]){next [nil]}
r([[]]){next [[]]}
r([]){next [*[]]}
r([1]){next [*[1]]}
r([1,2]){next [*[1,2]]}
r([]){next *[]}
r([1]){next *[1]}
r([nil]){next *[nil]}
r([[]]){next *[[]]}
r([]){next *[*[]]}
r([1]){next *[*[1]]}
r([1,2]){next *[*[1,2]]}
undef r
def r(val); *a = yield(); assert_equal(val, a); end
r([nil]){next}
r([nil]){next nil}
r([1]){next 1}
r([]){next []}
r([1]){next [1]}
r([nil]){next [nil]}
r([[]]){next [[]]}
r([1,2]){next [1,2]}
r([]){next [*[]]}
r([1]){next [*[1]]}
r([1,2]){next [*[1,2]]}
undef r
def r(val); *a = *yield(); assert_equal(val, a); end
r([[]]){next *[[]]}
r([1,2]){next *[1,2]}
r([1,2]){next *[*[1,2]]}
undef r
def r(val); a,b,*c = yield(); assert_equal(val, [a,b,c]); end
r([nil,nil,[]]){next}
r([nil,nil,[]]){next nil}
r([1,nil,[]]){next 1}
r([nil,nil,[]]){next []}
r([1,nil,[]]){next [1]}
r([nil,nil,[]]){next [nil]}
r([[],nil,[]]){next [[]]}
r([1,2,[]]){next [1,2]}
r([nil,nil,[]]){next [*[]]}
r([1,nil,[]]){next [*[1]]}
r([1,2,[]]){next [*[1,2]]}
undef r
def r(val); a,b,*c = *yield(); assert_equal(val, [a,b,c]); end
r([[],nil,[]]){next *[[]]}
r([1,2,[]]){next *[1,2]}
r([1,2,[]]){next *[*[1,2]]}
undef r
end
def test_massign
a = nil
assert(defined?(a))
assert_nil(a)
a, b = 1, 2
assert_equal 1, a
assert_equal 2, b
a, b, c = 1, 2, 3
assert_equal 1, a
assert_equal 2, b
assert_equal 3, c
a = 1
b = 2
a, b = b, a
assert_equal 2, a
assert_equal 1, b
a, = 1, 2
assert_equal 1, a
a, = 1, 2, 3
assert_equal 1, a
a, * = 1, 2, 3
assert_equal 1, a
a, *b = 1, 2, 3
assert_equal 1, a
assert_equal [2, 3], b
a = 1, 2
assert_equal [1, 2], a
a = [1, 2], [3, 4]
assert_equal [[1,2], [3,4]], a
a, (b, c), d = 1, [2, 3], 4
assert_equal 1, a
assert_equal 2, b
assert_equal 3, c
assert_equal 4, d
*a = 1, 2, 3
assert_equal([1, 2, 3], a)
*a = 4
assert_equal([4], a)
*a = nil
assert_equal([nil], a)
a, b = 1
assert_equal 1, a
assert_nil b
a, b = [1, 2]
assert_equal 1, a
assert_equal 2, b
end
def test_nested_massign
(a, b), c = [[1, 2], 3]; assert_equal [1,2,3], [a,b,c]
a, (b, c) = [[1, 2], 3]; assert_equal [[1,2], 3, nil], [a,b,c]
a, (b, c) = [1, [2, 3]]; assert_equal [1,2,3], [a,b,c]
(a, b), *c = [[1, 2], 3]; assert_equal [1,2,[3]], [a,b,c]
(a,b),c,(d,e) = [[1,2],3,[4,5]]; assert_equal [1,2,3,4,5],[a,b,c,d,e]
(a,*b),c,(d,e,*) = [[1,2],3,[4,5]]; assert_equal [1,[2],3,4,5],[a,b,c,d,e]
(a,b),c,(d,*e) = [[1,2,3],4,[5,6,7,8]]; assert_equal [1,2,4,5,[6,7,8]],[a,b,c,d,e]
(a,(b1,b2)),c,(d,e) = [[1,2],3,[4,5]]; assert_equal [1,2,nil,3,4,5],[a,b1,b2,c,d,e]
(a,(b1,b2)),c,(d,e) = [[1,[21,22]],3,[4,5]]; assert_equal [1,21,22,3,4,5],[a,b1,b2,c,d,e]
end
class MyObj
def to_ary
[[1,2],[3,4]]
end
end
def test_to_ary_splat
a, b = MyObj.new
assert_equal [[1,2],[3,4]], [a,b]
end
A = 1
B = 2
X, Y = A, B
class Base
A = 3
B = 4
end
def test_const_massign
assert_equal [1,2], [X,Y]
a, b = Base::A, Base::B
assert_equal [3,4], [a,b]
end
end
require_relative 'sentence'
class TestAssignmentGen < Test::Unit::TestCase
Syntax = {
:exp => [["0"],
["nil"],
["false"],
["[]"],
["[",:exps,"]"]],
:exps => [[:exp],
[:exp,",",:exps]],
:arg => [[:exp]],
:mrhs => [[:args,",",:arg],
[:args,",","*",:arg],
["*",:arg]],
:args => [[:arg],
["*",:arg],
[:args,",",:arg],
[:args,",","*",:arg]],
:mlhs => [[:mlhs_basic],
["(",:mlhs_inner,")"]],
:mlhs_inner => [[:mlhs_basic],
["(",:mlhs_inner,")"]],
:mlhs_basic => [[:mlhs_head],
[:mlhs_head,:mlhs_item],
[:mlhs_head,"*",:mlhs_node],
[:mlhs_head,"*",:mlhs_node,",",:mlhs_post],
[:mlhs_head,"*"],
[:mlhs_head,"*",",", :mlhs_post],
[ "*",:mlhs_node],
[ "*",:mlhs_node,",",:mlhs_post],
[ "*"],
[ "*",",", :mlhs_post]],
:mlhs_head => [[:mlhs_item,","],
[:mlhs_head,:mlhs_item,","]],
:mlhs_post => [[:mlhs_item],
[:mlhs_post,",",:mlhs_item]],
:mlhs_item => [[:mlhs_node],
["(",:mlhs_inner,")"]],
:mlhs_node => [["var"]],
:xassign => [["var"," = ",:exp],
["var"," = ",:mrhs],
[:mlhs," = ",:exp],
[:mlhs," = ",:mrhs]],
}
def rename_var(obj)
vars = []
r = obj.subst('var') {
var = "v#{vars.length}"
vars << var
var
}
return r, vars
end
def expand_except_paren(obj)
return obj if obj.respond_to? :to_str
obj.expand {|s|
!(s[0] == '(' && s[-1] == ')') &&
!(s[0] == '[' && s[-1] == ']')
}
end
def extract_single_element(ary)
raise "not a single element array: #{ary.inspect}" if ary.length != 1
ary[0]
end
def emu_assign_ary(lhs, rv, h)
rv = rv.respond_to?(:to_ary) ? rv : [rv]
rv = rv.dup
a = [[]]
lhs.each {|e|
if e == ','
a << []
else
a.last << e
end
}
a.pop if a.last == []
pre = []
star = post = nil
a.each {|e|
if post
post << e
elsif e[0] == '*'
star = e
post = []
else
pre << e
end
}
pre.map! {|e| extract_single_element(e) }
if star
if star == ['*']
star = nil
else
star = extract_single_element(star[1..-1])
end
end
post.map! {|e| extract_single_element(e) } if post
until pre.empty?
emu_assign_single(pre.shift, rv.shift, h)
end
if post
if rv.length < post.length
until post.empty?
emu_assign_single(post.shift, rv.shift, h)
end
else
until post.empty?
emu_assign_single(post.pop, rv.pop, h)
end
end
end
if star
emu_assign_single(star, rv, h)
end
end
def emu_assign_single(lhs, rv, h={})
if lhs.respond_to? :to_str
if /\A[a-z0-9]+\z/ =~ lhs
h[lhs] = rv
else
raise "unexpected lhs string: #{lhs.inspect}"
end
elsif Sentence === lhs
if lhs[0] == '(' && lhs[-1] == ')'
emu_assign_ary(lhs[1...-1], rv, h)
elsif lhs.length == 1 && String === lhs[0] && /\A[a-z0-9]+\z/ =~ lhs[0]
h[lhs[0]] = rv
else
raise "unexpected lhs sentence: #{lhs.inspect}"
end
else
raise "unexpected lhs: #{lhs.inspect}"
end
h
end
def emu_assign(assign)
lhs = expand_except_paren(assign[0])
rhs = expand_except_paren(assign[2])
lopen = Sentence === lhs && lhs[-1] != ')' && lhs.any? {|e| e == '*' || e == ',' }
ropen = Sentence === rhs && rhs[-1] != ']' && rhs.any? {|e| e == '*' || e == ',' }
lhs = Sentence.new(['(']+lhs.to_a+[')']) if lopen
begin
rv = eval((ropen ? ["[",assign[2],"]"] : assign[2]).join(''))
rescue Exception
rv = $!.message
end
emu_assign_single(lhs, rv)
end
def do_assign(assign, vars)
assign = assign.to_s
code1 = "#{assign}; [#{vars.join(",")}]"
assign.gsub!(/\bv\d+\b/, "o.a")
code2 = "o=[];class << o; self end.send(:define_method,:a=){|v|self << v};#{assign};o"
begin
vals1 = eval(code1)
rescue Exception
return {:ex=>$!.message}
end
begin
vals2 = eval(code2)
rescue Exception
return {:ex=>$!.message}
end
assert_equal(vals1, vals2, code1)
vals = vals1
h = {}
[vars, vals].transpose.each {|k,v| h[k] = v }
h
end
def check(assign)
assign, vars = rename_var(assign)
sent = assign.to_s
bruby = do_assign(assign, vars).to_a.sort
bemu = emu_assign(assign).to_a.sort
assert_equal(bemu, bruby, sent)
end
def test_assignment
syntax = Sentence.expand_syntax(Syntax)
Sentence.each(syntax, :xassign, 4) {|assign|
check(assign)
}
end
end