Mercurial > vim
diff src/testdir/test_lambda.vim @ 9527:e8b3db8e2d30 v7.4.2044
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 |
| parents | |
| children | 3ca0fd9709b1 |
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new file mode 100644 --- /dev/null +++ b/src/testdir/test_lambda.vim @@ -0,0 +1,48 @@ +function! Test_lambda_with_filter() + let s:x = 2 + call assert_equal([2, 3], filter([1, 2, 3], {i, v -> v >= s:x})) +endfunction + +function! Test_lambda_with_map() + let s:x = 1 + call assert_equal([2, 3, 4], map([1, 2, 3], {i, v -> v + s:x})) +endfunction + +function! Test_lambda_with_sort() + call assert_equal([1, 2, 3, 4, 7], sort([3,7,2,1,4], {a, b -> a - b})) +endfunction + +function! Test_lambda_with_timer() + if !has('timers') + return + endif + + let s:n = 0 + let s:timer_id = 0 + function! s:Foo() + "let n = 0 + let s:timer_id = timer_start(50, {-> execute("let s:n += 1 | echo s:n")}, {"repeat": -1}) + endfunction + + call s:Foo() + sleep 200ms + " do not collect lambda + call test_garbagecollect_now() + let m = s:n + sleep 200ms + call timer_stop(s:timer_id) + call assert_true(m > 1) + call assert_true(s:n > m + 1) + call assert_true(s:n < 9) +endfunction + +function! Test_lambda_with_partial() + let l:Cb = function({... -> ['zero', a:1, a:2, a:3]}, ['one', 'two']) + call assert_equal(['zero', 'one', 'two', 'three'], l:Cb('three')) +endfunction + +function Test_lambda_fails() + call assert_equal(3, {a, b -> a + b}(1, 2)) + call assert_fails('echo {a, a -> a + a}(1, 2)', 'E15:') + call assert_fails('echo {a, b -> a + b)}(1, 2)', 'E15:') +endfunc