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require 'test/unit'
class TestProc < Test::Unit::TestCase
def test_proc
p1 = proc{|i| i}
assert_equal(2, p1.call(2))
assert_equal(3, p1.call(3))
p1 = proc{|i| i*2}
assert_equal(4, p1.call(2))
assert_equal(6, p1.call(3))
p2 = nil
x=0
proc{
iii=5 # nested local variable
p1 = proc{|i|
iii = i
}
p2 = proc {
x = iii # nested variables shared by procs
}
# scope of nested variables
assert(defined?(iii))
}.call
assert(!defined?(iii)) # out of scope
loop{iii=5; assert(eval("defined? iii")); break}
loop {
iii = 10
def self.dyna_var_check
loop {
assert(!defined?(iii))
break
}
end
dyna_var_check
break
}
p1.call(5)
p2.call
assert_equal(5, x)
end
def assert_arity(n)
meta = class << self; self; end
meta.class_eval {define_method(:foo, Proc.new)}
assert_equal(n, method(:foo).arity)
end
def test_arity
assert_equal(0, proc{}.arity)
assert_equal(0, proc{||}.arity)
assert_equal(1, proc{|x|}.arity)
assert_equal(2, proc{|x, y|}.arity)
assert_equal(-2, proc{|x, *y|}.arity)
assert_equal(-1, proc{|*x|}.arity)
assert_equal(-1, proc{|*|}.arity)
assert_equal(-3, proc{|x, *y, z|}.arity)
assert_equal(-4, proc{|x, *y, z, a|}.arity)
assert_arity(0) {}
assert_arity(0) {||}
assert_arity(1) {|x|}
assert_arity(2) {|x, y|}
assert_arity(-2) {|x, *y|}
assert_arity(-3) {|x, *y, z|}
assert_arity(-1) {|*x|}
assert_arity(-1) {|*|}
end
def m(x)
lambda { x }
end
def test_eq
a = m(1)
b = m(2)
assert_not_equal(a, b, "[ruby-dev:22592]")
assert_not_equal(a.call, b.call, "[ruby-dev:22592]")
assert_not_equal(proc {||}, proc {|x,y|}, "[ruby-dev:22599]")
a = lambda {|x| lambda {} }.call(1)
b = lambda {}
assert_not_equal(a, b, "[ruby-dev:22601]")
end
def test_block_par
assert_equal(10, Proc.new{|&b| b.call(10)}.call {|x| x})
assert_equal(12, Proc.new{|a,&b| b.call(a)}.call(12) {|x| x})
end
def test_safe
safe = $SAFE
c = Class.new
x = c.new
p = proc {
$SAFE += 1
proc {$SAFE}
}.call
assert_equal(safe, $SAFE)
assert_equal(safe + 1, p.call)
assert_equal(safe, $SAFE)
c.class_eval {define_method(:safe, p)}
assert_equal(safe, x.safe)
assert_equal(safe, x.method(:safe).call)
assert_equal(safe, x.method(:safe).to_proc.call)
p = proc {$SAFE += 1}
assert_equal(safe + 1, p.call)
assert_equal(safe, $SAFE)
c.class_eval {define_method(:inc, p)}
assert_equal(safe + 1, proc {x.inc; $SAFE}.call)
assert_equal(safe, $SAFE)
assert_equal(safe + 1, proc {x.method(:inc).call; $SAFE}.call)
assert_equal(safe, $SAFE)
assert_equal(safe + 1, proc {x.method(:inc).to_proc.call; $SAFE}.call)
assert_equal(safe, $SAFE)
end
def m2
"OK"
end
def block
method(:m2).to_proc
end
# [yarv-dev:777] block made by Method#to_proc
def test_method_to_proc
b = block()
assert_equal "OK", b.call
end
def test_curry
b = proc {|x, y, z| (x||0) + (y||0) + (z||0) }
assert_equal(6, b.curry[1][2][3])
assert_equal(6, b.curry[1, 2][3, 4])
assert_equal(6, b.curry(5)[1][2][3][4][5])
assert_equal(6, b.curry(5)[1, 2][3, 4][5])
assert_equal(1, b.curry(1)[1])
b = proc {|x, y, z, *w| (x||0) + (y||0) + (z||0) + w.inject(0, &:+) }
assert_equal(6, b.curry[1][2][3])
assert_equal(10, b.curry[1, 2][3, 4])
assert_equal(15, b.curry(5)[1][2][3][4][5])
assert_equal(15, b.curry(5)[1, 2][3, 4][5])
assert_equal(1, b.curry(1)[1])
b = lambda {|x, y, z| (x||0) + (y||0) + (z||0) }
assert_equal(6, b.curry[1][2][3])
assert_raise(ArgumentError) { b.curry[1, 2][3, 4] }
assert_raise(ArgumentError) { b.curry(5) }
assert_raise(ArgumentError) { b.curry(1) }
b = lambda {|x, y, z, *w| (x||0) + (y||0) + (z||0) + w.inject(0, &:+) }
assert_equal(6, b.curry[1][2][3])
assert_equal(10, b.curry[1, 2][3, 4])
assert_equal(15, b.curry(5)[1][2][3][4][5])
assert_equal(15, b.curry(5)[1, 2][3, 4][5])
assert_raise(ArgumentError) { b.curry(1) }
b = proc { :foo }
assert_equal(:foo, b.curry[])
end
def test_curry_ski_fib
s = proc {|f, g, x| f[x][g[x]] }.curry
k = proc {|x, y| x }.curry
i = proc {|x| x }.curry
fib = []
inc = proc {|x| fib[-1] += 1; x }.curry
ret = proc {|x| throw :end if fib.size > 10; fib << 0; x }.curry
catch(:end) do
s[
s[s[i][i]][k[i]]
][
k[inc]
][
s[
s[
k[s]
][
s[k[s[k[s]]]
][
s[s[k[s]][s[k[s[k[ret]]]][s[k[s[i]]][k]]]][k]]
]
][
k[s[k[s]][k]]
]
]
end
assert_equal(fib, [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89])
end
end
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