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annotate src/testdir/test_lambda.vim @ 9527:e8b3db8e2d30 v7.4.2044

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commit https://github.com/vim/vim/commit/069c1e7fa9f45a665064f7f2c17da84d6a48f544 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jul 15 21:25:08 2016 +0200 patch 7.4.2044 Problem: filter() and map() either require a string or defining a function. Solution: Support lambda, a short way to define a function that evaluates an expression. (Yasuhiro Matsumoto, Ken Takata)
author Christian Brabandt <cb@256bit.org>
date Fri, 15 Jul 2016 21:30:07 +0200
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children 3ca0fd9709b1
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e8b3db8e2d30 commit https://github.com/vim/vim/commit/069c1e7fa9f45a665064f7f2c17da84d6a48f544
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1 function! Test_lambda_with_filter()
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2 let s:x = 2
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3 call assert_equal([2, 3], filter([1, 2, 3], {i, v -> v >= s:x}))
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4 endfunction
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6 function! Test_lambda_with_map()
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7 let s:x = 1
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8 call assert_equal([2, 3, 4], map([1, 2, 3], {i, v -> v + s:x}))
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9 endfunction
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11 function! Test_lambda_with_sort()
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12 call assert_equal([1, 2, 3, 4, 7], sort([3,7,2,1,4], {a, b -> a - b}))
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13 endfunction
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15 function! Test_lambda_with_timer()
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16 if !has('timers')
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17 return
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18 endif
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20 let s:n = 0
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21 let s:timer_id = 0
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22 function! s:Foo()
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23 "let n = 0
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24 let s:timer_id = timer_start(50, {-> execute("let s:n += 1 | echo s:n")}, {"repeat": -1})
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25 endfunction
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27 call s:Foo()
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28 sleep 200ms
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29 " do not collect lambda
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30 call test_garbagecollect_now()
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31 let m = s:n
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32 sleep 200ms
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33 call timer_stop(s:timer_id)
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34 call assert_true(m > 1)
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35 call assert_true(s:n > m + 1)
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36 call assert_true(s:n < 9)
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37 endfunction
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38
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39 function! Test_lambda_with_partial()
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40 let l:Cb = function({... -> ['zero', a:1, a:2, a:3]}, ['one', 'two'])
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41 call assert_equal(['zero', 'one', 'two', 'three'], l:Cb('three'))
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42 endfunction
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44 function Test_lambda_fails()
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45 call assert_equal(3, {a, b -> a + b}(1, 2))
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46 call assert_fails('echo {a, a -> a + a}(1, 2)', 'E15:')
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47 call assert_fails('echo {a, b -> a + b)}(1, 2)', 'E15:')
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48 endfunc