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require 'test/unit'
class Array
def iter_test1
collect{|e| [e, yield(e)]}.sort{|a,b|a[1]<=>b[1]}
end
def iter_test2
a = collect{|e| [e, yield(e)]}
a.sort{|a,b|a[1]<=>b[1]}
end
end
class TestIterator < Test::Unit::TestCase
def ttt
assert(iterator?)
end
def test_iterator
assert(!iterator?)
ttt{}
# yield at top level !! here's not toplevel
assert(!defined?(yield))
end
def test_array
$x = [1, 2, 3, 4]
$y = []
# iterator over array
for i in $x
$y.push i
end
assert_equal($x, $y)
end
def tt
1.upto(10) {|i|
yield i
}
end
def tt2(dummy)
yield 1
end
def tt3(&block)
tt2(raise(ArgumentError,""),&block)
end
def test_nested_iterator
i = 0
tt{|i| break if i == 5}
assert_equal(0, i)
assert_raises(ArgumentError) do
tt3{}
end
end
def tt4 &block
tt2(raise(ArgumentError,""),&block)
end
def test_block_argument_without_paren
assert_raises(ArgumentError) do
tt4{}
end
end
# iterator break/redo/next
def test_break
done = true
loop{
break
done = false # should not reach here
}
assert(done)
done = false
$bad = false
loop {
break if done
done = true
next
$bad = true # should not reach here
}
assert(!$bad)
done = false
$bad = false
loop {
break if done
done = true
redo
$bad = true # should not reach here
}
assert(!$bad)
$x = []
for i in 1 .. 7
$x.push i
end
assert_equal(7, $x.size)
assert_equal([1, 2, 3, 4, 5, 6, 7], $x)
end
def test_append_method_to_built_in_class
$x = [[1,2],[3,4],[5,6]]
assert_equal($x.iter_test1{|x|x}, $x.iter_test2{|x|x})
end
class IterTest
def initialize(e); @body = e; end
def each0(&block); @body.each(&block); end
def each1(&block); @body.each {|*x| block.call(*x) } end
def each2(&block); @body.each {|*x| block.call(x) } end
def each3(&block); @body.each {|x| block.call(*x) } end
def each4(&block); @body.each {|x| block.call(x) } end
def each5; @body.each {|*x| yield(*x) } end
def each6; @body.each {|*x| yield(x) } end
def each7; @body.each {|x| yield(*x) } end
def each8; @body.each {|x| yield(x) } end
def f(a)
a
end
end
def test_itertest
assert_equal([1], IterTest.new(nil).method(:f).to_proc.call([1]))
m = /\w+/.match("abc")
assert_equal([m], IterTest.new(nil).method(:f).to_proc.call([m]))
IterTest.new([0]).each0 {|x| assert_equal(0, x)}
IterTest.new([1]).each1 {|x| assert_equal(1, x)}
IterTest.new([2]).each2 {|x| assert_equal([2], x)}
IterTest.new([4]).each4 {|x| assert_equal(4, x)}
IterTest.new([5]).each5 {|x| assert_equal(5, x)}
IterTest.new([6]).each6 {|x| assert_equal([6], x)}
IterTest.new([8]).each8 {|x| assert_equal(8, x)}
IterTest.new([[0]]).each0 {|x| assert_equal([0], x)}
IterTest.new([[1]]).each1 {|x| assert_equal([1], x)}
IterTest.new([[2]]).each2 {|x| assert_equal([[2]], x)}
IterTest.new([[3]]).each3 {|x| assert_equal(3, x)}
IterTest.new([[4]]).each4 {|x| assert_equal([4], x)}
IterTest.new([[5]]).each5 {|x| assert_equal([5], x)}
IterTest.new([[6]]).each6 {|x| assert_equal([[6]], x)}
IterTest.new([[7]]).each7 {|x| assert_equal(7, x)}
IterTest.new([[8]]).each8 {|x| assert_equal([8], x)}
IterTest.new([[0,0]]).each0 {|*x| assert_equal([[0,0]], x)}
IterTest.new([[8,8]]).each8 {|*x| assert_equal([[8,8]], x)}
end
def m(var)
var
end
def m1
m(block_given?)
end
def m2
m(block_given?,&proc{})
end
def test_block_given
assert(m1{p 'test'})
assert(m2{p 'test'})
assert(!m1())
assert(!m2())
end
def m3(var, &block)
m(yield(var), &block)
end
def m4(&block)
m(m1(), &block)
end
def test_block_passing
assert(!m4())
assert(!m4 {})
assert_equal(100, m3(10) {|x|x*x})
end
class C
include Enumerable
def initialize
@a = [1,2,3]
end
def each(&block)
@a.each(&block)
end
end
def test_collect
assert_equal([1,2,3], C.new.collect{|n| n})
end
def test_proc
assert_instance_of(Proc, lambda{})
assert_instance_of(Proc, Proc.new{})
lambda{|a|assert_equal(a, 1)}.call(1)
end
def test_block
assert_instance_of(NilClass, get_block)
assert_instance_of(Proc, get_block{})
end
def test_argument
assert_nothing_raised {lambda{||}.call}
assert_raises(ArgumentError) {lambda{||}.call(1)}
assert_nothing_raised {lambda{|a,|}.call(1)}
assert_raises(ArgumentError) {lambda{|a,|}.call()}
assert_raises(ArgumentError) {lambda{|a,|}.call(1,2)}
end
def get_block(&block)
block
end
def test_get_block
assert_instance_of(Proc, get_block{})
assert_nothing_raised {get_block{||}.call()}
assert_nothing_raised {get_block{||}.call(1)}
assert_nothing_raised {get_block{|a,|}.call(1)}
assert_nothing_raised {get_block{|a,|}.call()}
assert_nothing_raised {get_block{|a,|}.call(1,2)}
assert_nothing_raised {get_block(&lambda{||}).call()}
assert_raises(ArgumentError) {get_block(&lambda{||}).call(1)}
assert_nothing_raised {get_block(&lambda{|a,|}).call(1)}
assert_raises(ArgumentError) {get_block(&lambda{|a,|}).call(1,2)}
block = get_block{11}
assert_instance_of(Proc, block)
assert_instance_of(Proc, block.to_proc)
assert_equal(block.clone.call, 11)
assert_instance_of(Proc, get_block(&block))
lmd = lambda{44}
assert_instance_of(Proc, lmd)
assert_instance_of(Proc, lmd.to_proc)
assert_equal(lmd.clone.call, 44)
assert_instance_of(Proc, get_block(&lmd))
assert_equal(1, Proc.new{|a,| a}.call(1,2,3))
assert_nothing_raised {Proc.new{|a,|}.call(1,2)}
end
def return1_test
Proc.new {
return 55
}.call + 5
end
def test_return1
assert_equal(55, return1_test())
end
def return2_test
lambda {
return 55
}.call + 5
end
def test_return2
assert_equal(60, return2_test())
end
def proc_call(&b)
b.call
end
def proc_yield()
yield
end
def proc_return1
proc_call{return 42}+1
end
def test_proc_return1
assert_equal(42, proc_return1())
end
def proc_return2
proc_yield{return 42}+1
end
def test_proc_return2
assert_equal(42, proc_return2())
end
def test_ljump
assert_raises(LocalJumpError) {get_block{break}.call}
# cannot use assert_nothing_raised due to passing block.
begin
val = lambda{break 11}.call
rescue LocalJumpError
assert(false, "LocalJumpError occurred from break in lambda")
else
assert(11, val)
end
block = get_block{11}
lmd = lambda{44}
assert_equal(0, block.arity)
assert_equal(0, lmd.arity)
assert_equal(0, lambda{||}.arity)
assert_equal(1, lambda{|a|}.arity)
assert_equal(1, lambda{|a,|}.arity)
assert_equal(2, lambda{|a,b|}.arity)
end
def marity_test(m)
mobj = method(m)
assert_equal(mobj.arity, mobj.to_proc.arity)
end
def test_marity
marity_test(:assert)
marity_test(:marity_test)
marity_test(:p)
lambda(&method(:assert)).call(true)
lambda(&get_block{|a,n| assert(a,n)}).call(true, "marity")
end
def foo
yield(:key, :value)
end
def bar(&blk)
blk.call(:key, :value)
end
def test_yield_vs_call
foo{|k,v| assert_equal([:key, :value], [k,v])}
bar{|k,v| assert_equal([:key, :value], [k,v])}
end
class H
def each
yield [:key, :value]
end
alias each_pair each
end
def test_assoc_yield
[{:key=>:value}, H.new].each {|h|
h.each{|a| assert_equal([:key, :value], a)}
h.each{|a,| assert_equal(:key, a)}
h.each{|*a| assert_equal([[:key, :value]], a)}
h.each{|k,v| assert_equal([:key, :value], [k,v])}
h.each_pair{|a| assert_equal([:key, :value], a)}
h.each_pair{|a,| assert_equal(:key, a)}
h.each_pair{|*a| assert_equal([[:key, :value]], a)}
h.each_pair{|k,v| assert_equal([:key, :value], [k,v])}
}
end
class ITER_TEST1
def a
block_given?
end
end
class ITER_TEST2 < ITER_TEST1
include Test::Unit::Assertions
def a
assert(super)
super
end
end
def test_iter_test2
assert(ITER_TEST2.new.a {})
end
class ITER_TEST3
def foo x
return yield if block_given?
x
end
end
class ITER_TEST4 < ITER_TEST3
include Test::Unit::Assertions
def foo x
assert_equal(super, yield)
assert_equal(x, super(x, &nil))
end
end
def test_iter4
ITER_TEST4.new.foo(44){55}
end
def test_break__nested_loop1
_test_break__nested_loop1 do
break
end
end
def _test_break__nested_loop1
while true
yield
end
assert(false, "must not reach here")
end
def test_break__nested_loop2
_test_break__nested_loop2 do
break
end
end
def _test_break__nested_loop2
until false
yield
end
assert(false, "must not reach here")
end
def test_break__nested_loop3
_test_break__nested_loop3 do
break
end
end
def _test_break__nested_loop3
loop do
yield
end
assert(false, "must not reach here")
end
def test_break_from_enum
result = ["a"].inject("ng") {|x,y| break "ok"}
assert_equal("ok", result)
end
def _test_return_trace_func(x)
set_trace_func(proc {})
[].fetch(2) {return x}
ensure
set_trace_func(nil)
end
def test_return_trace_func
ok = "returned gracefully"
result = "skipped"
result = _test_return_trace_func(ok)
ensure
assert_equal(ok, result)
return
end
class IterString < ::String
def ===(other)
super if !block_given?
end
end
# Check that the block passed to an iterator
# does not get propagated inappropriately
def test_block_given_within_iterator
assert_equal(["b"], ["a", "b", "c"].grep(IterString.new("b")) {|s| s})
end
def test_enumerator
[1,2,3].each.with_index {|x,i|
assert_equal(x, i+1)
}
e = [1,2,3].each
assert_equal(1, e.next)
assert_equal(2, e.next)
assert_equal(3, e.next)
assert_raises(StopIteration){e.next}
e.rewind
assert_equal(1, e.next)
e.rewind
a = []
loop{a.push e.next}
assert_equal([1,2,3], a)
assert_equal([[8, 1, 10], [6, 2, 11], [4, 3, 12]],
[8,6,4].zip((1..10),(10..100)).to_a)
end
end
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