summaryrefslogtreecommitdiff
path: root/test/ruby/test_iterator.rb
blob: ebfb60354ad65f15a1564897422b450525585868 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
# frozen_string_literal: false
require 'test/unit'

class Array
  def iter_test1
    collect{|e| [e, yield(e)]}.sort{|a,b|a[1]<=>b[1]}
  end
  def iter_test2
    ary = collect{|e| [e, yield(e)]}
    ary.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{|j| break if j == 5}
    assert_equal(0, i)

    assert_raise(ArgumentError) do
      tt3{}
    end
  end

  def tt4 &block
    tt2(raise(ArgumentError,""),&block)
  end

  def test_block_argument_without_paren
    assert_raise(ArgumentError) do
      tt4{}
    end
  end

  # iterator break/redo/next
  def test_break
    done = true
    loop{
      break if true
      done = false			# should not reach here
    }
    assert(done)

    done = false
    bad = false
    loop {
      break if done
      done = true
      next if true
      bad = true			# should not reach here
    }
    assert(!bad)

    done = false
    bad = false
    loop {
      break if done
      done = true
      redo if true
      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_array_for_masgn
    a = [Struct.new(:to_ary).new([1,2])]
    x = []
    a.each {|i,j|x << [i,j]}
    assert_equal([[1,2]], x)
    x = []
    for i,j in a; x << [i,j]; end
    assert_equal([[1,2]], x)
  end

  def test_append_method_to_built_in_class
    x = [[1,2],[3,4],[5,6]]
    assert_equal(x.iter_test1{|e|e}, x.iter_test2{|e|e})
  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_raise(ArgumentError) {lambda{||}.call(1)}
    assert_nothing_raised {lambda{|a,|}.call(1)}
    assert_raise(ArgumentError) {lambda{|a,|}.call()}
    assert_raise(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_raise(ArgumentError) {get_block(&lambda{||}).call(1)}
    assert_nothing_raised {get_block(&lambda{|a,|}).call(1)}
    assert_raise(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_call2(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_raise(LocalJumpError) {get_block{break}.call}
    assert_raise(LocalJumpError) {proc_call2(get_block{break}){}}

    # 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_equal(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_raise(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