Repository navigation
Expand file tree
/
Copy pathmini-test.txt
More file actions
882 lines (727 loc) · 38.7 KB
/
Copy pathmini-test.txt
File metadata and controls
882 lines (727 loc) · 38.7 KB
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
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
==============================================================================
------------------------------------------------------------------------------
*mini.test*
*MiniTest*
Write and use extensive neovim plugin tests
Features:
- Test action is defined as a named callable entry of a table.
- Helper for creating child Neovim process which is designed to be used in
tests (including taking and verifying screenshots). See
|MiniTest.new_child_neovim()| and |Minitest.expect.reference_screenshot()|.
- Hierarchical organization of tests with custom hooks, parametrization,
and user data. See |MiniTest.new_set()|.
- Emulation of 'Olivine-Labs/busted' interface (`describe`, `it`, etc.).
- Predefined small yet usable set of expectations (`assert`-like functions).
See |MiniTest.expect|.
- Customizable definition of what files should be tested.
- Test case filtering. There are predefined wrappers for testing a file
(|MiniTest.run_file()|) and case at a location like current cursor position
(|MiniTest.run_at_location()|).
- Customizable reporter of output results. There are two predefined ones:
- |MiniTest.gen_reporter.buffer()| for interactive usage.
- |MiniTest.gen_reporter.stdout()| for headless Neovim.
- Customizable project specific testing script.
What it doesn't support:
- Parallel execution. Due to idea of limiting implementation complexity.
- Mocks, stubs, etc. Use child Neovim process and manually override what is
needed. Reset child process it afterwards.
- "Overly specific" expectations. Tests for (no) equality and (absence of)
errors usually cover most of the needs. Adding new expectations is a
subject to weighing its usefulness against additional implementation
complexity. Use |MiniTest.new_expectation()| to create custom ones.
For more information see:
- 'TESTING.md' file for a hands-on introduction based on examples.
- Code of this plugin's tests. Consider it to be an example of intended
way to use 'mini.test' for test organization and creation.
# Workflow
- Organize tests in separate files. Each test file should return a test set
(explicitly or implicitly by using "busted" style functions).
- Write test actions as callable entries of test set. Use child process
inside test actions (see |MiniTest.new_child_neovim()|) and builtin
expectations (see |MiniTest.expect|).
- Run tests. This does two steps:
- *Collect*. This creates single hierarchical test set, flattens into
array of test cases (see |MiniTest-test-case|) while expanding with
parametrization, and possibly filters them.
- *Execute*. This safely calls hooks and main test actions in specified
order while allowing reporting progress in asynchronous fashion.
Detected errors means test case fail; otherwise - pass.
# Setup~
This module needs a setup with `require('mini.test').setup({})` (replace
`{}` with your `config` table). It will create global Lua table `MiniTest`
which you can use for scripting or manually (with `:lua MiniTest.*`).
See |MiniTest.config| for available config settings.
You can override runtime config settings locally to buffer inside
`vim.b.minitest_config` which should have same structure as `MiniTest.config`.
See |mini.nvim-buffer-local-config| for more details.
# Comparisons~
- Testing infrastructure from 'nvim-lua/plenary.nvim':
- Executes each file in separate headless Neovim process with customizable
'init.vim' file. While 'mini.test' executes everything in current
Neovim process encouraging writing tests with help of manually
managed child Neovim process (see |MiniTest.new_child_neovim()|).
- Tests are expected to be written with embedded simplified versions of
'Olivine-Labs/busted' and 'Olivine-Labs/luassert'. While 'mini.test'
uses concepts of test set (see |MiniTest.new_set()|) and test case
(see |MiniTest-test-case|). It also can emulate bigger part of
"busted" framework.
- Has single way of reporting progress (shows result after every case
without summary). While 'mini.test' can have customized reporters
with defaults for interactive and headless usage (provide more
compact and user-friendly summaries).
- Allows parallel execution, while 'mini.test' does not.
- Allows making mocks, stubs, and spies, while 'mini.test' does not in
favor of manually overwriting functionality in child Neovim process.
Although 'mini.test' supports emulation of "busted style" testing, it will
be more stable to use its designed approach of defining tests (with
`MiniTest.new_set()` and explicit table fields). Couple of reasons:
- "Busted" syntax doesn't support full capabilities offered by 'mini.test'.
Mainly it is about parametrization and supplying user data to test sets.
- It is an emulation, not full support. So some subtle things might not
work the way you expect.
Some hints for converting from 'plenary.nvim' tests to 'mini.test':
- Rename files from "***_spec.lua" to "test_***.lua" and put them in
"tests" directory.
- Replace `assert` calls with 'mini.test' expectations. See |MiniTest.expect|.
- Create main test set `T = MiniTest.new_set()` and eventually return it.
- Make new sets (|MiniTest.new_set()|) from `describe` blocks. Convert
`before_each()` and `after_each` to `pre_case` and `post_case` hooks.
- Make test cases from `it` blocks.
# Highlight groups~
* `MiniTestEmphasis` - emphasis highlighting. By default it is a bold text.
* `MiniTestFail` - highlighting of failed cases. By default it is a bold
text with `vim.g.terminal_color_1` color (red).
* `MiniTestPass` - highlighting of passed cases. By default it is a bold
text with `vim.g.terminal_color_2` color (green).
To change any highlight group, modify it directly with |:highlight|.
# Disabling~
To disable, set `g:minitest_disable` (globally) or `b:minitest_disable`
(for a buffer) to `v:true`. Considering high number of different scenarios
and customization intentions, writing exact rules for disabling module's
functionality is left to user. See |mini.nvim-disabling-recipes| for common
recipes.
------------------------------------------------------------------------------
*MiniTest.setup()*
`MiniTest.setup`({config})
Module setup
Parameters~
{config} `(table|nil)` Module config table. See |MiniTest.config|.
Usage~
`require('mini.test').setup({})` (replace `{}` with your `config` table)
------------------------------------------------------------------------------
*MiniTest.config*
`MiniTest.config`
Module config
Default values:
>
MiniTest.config = {
-- Options for collection of test cases. See `:h MiniTest.collect()`.
collect = {
-- Temporarily emulate functions from 'busted' testing framework
-- (`describe`, `it`, `before_each`, `after_each`, and more)
emulate_busted = true,
-- Function returning array of file paths to be collected.
-- Default: all Lua files in 'tests' directory starting with 'test_'.
find_files = function()
return vim.fn.globpath('tests', '**/test_*.lua', true, true)
end,
-- Predicate function indicating if test case should be executed
filter_cases = function(case) return true end,
},
-- Options for execution of test cases. See `:h MiniTest.execute()`.
execute = {
-- Table with callable fields `start()`, `update()`, and `finish()`
reporter = nil,
-- Whether to stop execution after first error
stop_on_error = false,
},
-- Path (relative to current directory) to script which handles project
-- specific test running
script_path = 'scripts/minitest.lua',
}
<
------------------------------------------------------------------------------
*MiniTest.current*
`MiniTest.current`
Table with information about current state of test execution
Use it to examine result of |MiniTest.execute()|. It is reset at the
beginning of every call.
At least these keys are supported:
- <all_cases> - array with all cases being currently executed. Basically,
an input of `MiniTest.execute()`.
- <case> - currently executed test case. See |MiniTest-test-case|. Use it
to customize execution output (like adding custom notes, etc).
------------------------------------------------------------------------------
*MiniTest.new_set()*
`MiniTest.new_set`({opts}, {tbl})
Create test set
Test set is one of the two fundamental data structures. It is a table that
defines hierarchical test organization as opposed to sequential
organization with |MiniTest-test-case|.
All its elements are one of three categories:
- A callable (object that can be called; function or table with `__call`
metatble entry) is considered to define a test action. It will be called
with "current arguments" (result of all nested `parametrize` values, read
further). If it throws error, test has failed.
- A test set (output of this function) defines nested structure. Its
options during collection (see |MiniTest.collect()|) will be extended
with options of this (parent) test set.
- Any other elements are considered helpers and don't directly participate
in test structure.
Set options allow customization of test collection and execution (more
details in `opts` description):
- `hooks` - table with elements that will be called without arguments at
predefined stages of test execution.
- `parametrize` - array defining different arguments with which main test
actions will be called. Any non-trivial parametrization will lead to
every element (even nested) be "multiplied" and processed with every
element of `parametrize`. This allows handling many different combination
of tests with little effort.
- `data` - table with user data that will be forwarded to cases. Primary
objective is to be used for customized case filtering.
Notes:
- Preferred way of adding elements is by using syntax `T[name] = element`.
This way order of added elements will be preserved. Any other way won't
guarantee any order.
- Supplied options `opts` are stored in `opts` field of metatable
(`getmetatable(set).opts`).
Parameters~
{opts} `(table|nil)` Allowed options:
- <hooks> - table with fields:
- <pre_once> - executed before first filtered node.
- <pre_case> - executed before each case (even nested).
- <post_case> - executed after each case (even nested).
- <post_once> - executed after last filtered node.
- <parametrize> - array where each element is itself an array of
parameters to be appended to "current parameters" of callable fields.
Note: don't use plain `{}` as it is equivalent to "parametrization into
zero cases", so no cases will be collected from this set. Calling test
actions with no parameters is equivalent to `{{}}` or not supplying
`parametrize` option at all.
- <data> - user data to be forwarded to cases. Can be used for a more
granular filtering.
{tbl} `(table|nil)` Initial test items (possibly nested). Will be executed
without any guarantees on order.
Return~
`(table)` A single test set.
Usage~
>
-- Use with defaults
T = MiniTest.new_set()
T['works'] = function() MiniTest.expect.equality(1, 1) end
-- Use with custom options. This will result into two actual cases: first
-- will pass, second - fail.
T['nested'] = MiniTest.new_set({
hooks = { pre_case = function() _G.x = 1 end },
parametrize = { { 1 }, { 2 } }
})
T['nested']['works'] = function(x)
MiniTest.expect.equality(_G.x, x)
end
------------------------------------------------------------------------------
*MiniTest-test-case*
Test case
An item of sequential test organization, as opposed to hierarchical with
test set (see |MiniTest.new_set()|). It is created as result of test
collection with |MiniTest.collect()| to represent all necessary information
of test execution.
Execution of test case goes by the following rules:
- Call functions in order:
- All elements of `hooks.pre` from first to last without arguments.
- Field `test` with arguments unpacked from `args`.
- All elements of `hooks.post` from first to last without arguments.
- Error in any call gets appended to `exec.fails`, meaning error in any
hook will lead to test fail.
- State (`exec.state`) is changed before every call and after last call.
Class~
{Test-case}
Fields~
{args} `(table)` Array of arguments with which `test` will be called.
{data} `(table)` User data: all fields of `opts.data` from nested test sets.
{desc} `(table)` Description: array of fields from nested test sets.
{exec} `(table|nil)` Information about test case execution. Value of `nil` means
that this particular case was not (yet) executed. Has following fields:
- <fails> - array of strings with failing information.
- <notes> - array of strings with non-failing information.
- <state> - state of test execution. One of:
- 'Executing <name of what is being executed>' (during execution).
- 'Pass' (no fails, no notes).
- 'Pass with notes' (no fails, some notes).
- 'Fail' (some fails, no notes).
- 'Fail with notes' (some fails, some notes).
{hooks} `(table)` Hooks to be executed as part of test case. Has fields
<pre> and <post> with arrays to be consecutively executed before and
after execution of `test`.
{test} `(function|table)` Main callable object representing test action.
------------------------------------------------------------------------------
*MiniTest.skip()*
`MiniTest.skip`({msg})
Skip rest of current callable execution
Can be used inside hooks and main test callable of test case. Note: at the
moment implemented as a specially handled type of error.
Parameters~
{msg} `(string|nil)` Message to be added to current case notes.
------------------------------------------------------------------------------
*MiniTest.add_note()*
`MiniTest.add_note`({msg})
Add note to currently executed test case
Appends `msg` to `exec.notes` field of |MiniTest.current.case|.
Parameters~
{msg} `(string)` Note to add.
------------------------------------------------------------------------------
*MiniTest.finally()*
`MiniTest.finally`({f})
Register callable execution after current callable
Can be used inside hooks and main test callable of test case.
Parameters~
{f} `(function)` Callable to be executed after current callable is finished
executing (regardless of whether it ended with error or not).
------------------------------------------------------------------------------
*MiniTest.run()*
`MiniTest.run`({opts})
Run tests
- Try executing project specific script at path `opts.script_path`. If
successful (no errors), then stop.
- Collect cases with |MiniTest.collect()| and `opts.collect`.
- Execute collected cases with |MiniTest.execute()| and `opts.execute`.
Parameters~
{opts} `(table|nil)` Options with structure similar to |MiniTest.config|.
Absent values are inferred from there.
------------------------------------------------------------------------------
*MiniTest.run_file()*
`MiniTest.run_file`({file}, {opts})
Run specific test file
Basically a |MiniTest.run()| wrapper with custom `collect.find_files` option.
Parameters~
{file} `(string|nil)` Path to test file. By default a path of current buffer.
{opts} `(table|nil)` Options for |MiniTest.run()|.
------------------------------------------------------------------------------
*MiniTest.run_at_location()*
`MiniTest.run_at_location`({location}, {opts})
Run case(s) covering location
Try filtering case(s) covering location, meaning that definition of its
main `test` action (as taken from builtin `debug.getinfo`) is located in
specified file and covers specified line. Note that it can result in
multiple cases if they come from parametrized test set (see `parametrize`
option in |MiniTest.new_set()|).
Basically a |MiniTest.run()| wrapper with custom `collect.find_files` option.
Parameters~
{location} `(table|nil)` Table with fields <file> (path to file) and <line>
(line number in that file). Default is taken from current cursor position.
------------------------------------------------------------------------------
*MiniTest.collect()*
`MiniTest.collect`({opts})
Collect test cases
Overview of collection process:
- If `opts.emulate_busted` is `true`, temporary make special global
functions (removed at the end of collection). They can be used inside
test files to create hierarchical structure of test cases.
- Source each file from array output of `opts.find_files`. It should output
a test set (see |MiniTest.new_set()|) or `nil` (if "busted" style is used;
test set is created implicitly).
- Combine all test sets into single set with fields equal to its file path.
- Convert from hierarchical test configuration to sequential: from single
test set to array of test cases (see |MiniTest-test-case|). Conversion is
done in the form of "for every table element do: for every `parametrize`
element do: ...". Details:
- If element is a callable, construct test case with it being main
`test` action. Description is appended with key of element in current
test set table. Hooks, arguments, and data are taken from "current
nested" ones. Add case to output array.
- If element is a test set, process it in similar, recursive fashion.
The "current nested" information is expanded:
- `args` is extended with "current element" from `parametrize`.
- `desc` is appended with element key.
- `hooks` are appended to their appropriate places. `*_case` hooks
will be inserted closer to all child cases than hooks from parent
test sets: `pre_case` at end, `post_case` at start.
- `data` is extended via |vim.tbl_deep_extend()|.
- Any other element is not processed.
- Filter array with `opts.filter_cases`. Note that input case doesn't contain
all hooks, as `*_once` hooks will be added after filtration.
- Add `*_once` hooks to appropriate cases.
Parameters~
{opts} `(table|nil)` Options controlling case collection. Possible fields:
- <emulate_busted> - whether to emulate 'Olivine-Labs/busted' interface.
It emulates these global functions: `describe`, `it`, `setup`, `teardown`,
`before_each`, `after_each`. Use |MiniTest.skip()| instead of `pending()`
and |MiniTest.finally()| instead of `finally`.
- <find_files> - function which when called without arguments returns
array with file paths. Each file should be a Lua file returning single
test set or `nil`.
- <filter_cases> - function which when called with single test case
(see |MiniTest-test-case|) returns `false` if this case should be filtered
out; `true` otherwise.
Return~
`(table)` Array of test cases ready to be used by |MiniTest.execute()|.
------------------------------------------------------------------------------
*MiniTest.execute()*
`MiniTest.execute`({cases}, {opts})
Execute array of test cases
Overview of execution process:
- Reset `all_cases` in |MiniTest.current| with `cases` input.
- Call `reporter.start(cases)` (if present).
- Execute each case in natural array order (aligned with their integer
keys). Set `MiniTest.current.case` to currently executed case. Detailed
test case execution is described in |MiniTest-test-case|. After any state
change, call `reporter.update(case_num)` (if present), where `case_num` is an
integer key of current test case.
- Call `reporter.finish()` (if present).
Notes:
- Execution is done in asynchronous fashion with scheduling. This allows
making meaningful progress report during execution.
- This function doesn't return anything. Instead, it updates `cases` in
place with proper `exec` field. Use `all_cases` at |MiniTest.current| to
look at execution result.
Parameters~
{cases} `(table)` Array of test cases (see |MiniTest-test-case|).
{opts} `(table|nil)` Options controlling case collection. Possible fields:
- <reporter> - table with possible callable fields `start`, `update`,
`finish`. Default: |MiniTest.gen_reporter.buffer()| in interactive
usage and |MiniTest.gen_reporter.stdout()| in headless usage.
- <stop_on_error> - whether to stop execution (see |MiniTest.stop()|)
after first error. Default: `false`.
------------------------------------------------------------------------------
*MiniTest.stop()*
`MiniTest.stop`({opts})
Stop test execution
Parameters~
{opts} `(table|nil)` Options with fields:
- <close_all_child_neovim> - whether to close all child neovim processes
created with |MiniTest.new_child_neovim()|. Default: `true`.
------------------------------------------------------------------------------
*MiniTest.is_executing()*
`MiniTest.is_executing`()
Check if tests are being executed
Return~
`(boolean)`
------------------------------------------------------------------------------
*MiniTest.expect*
`MiniTest.expect`
Table with expectation functions
Each function has the following behavior:
- Silently returns `true` if expectation is fulfilled.
- Throws an informative error with information helpful for debugging.
Mostly designed to be used within 'mini.test' framework.
Usage~
>
local x = 1 + 1
MiniTest.expect.equality(x, 2) -- passes
MiniTest.expect.equality(x, 1) -- fails
------------------------------------------------------------------------------
*MiniTest.expect.equality()*
`MiniTest.expect.equality`({left}, {right})
Expect equality of two objects
Equality is tested via |vim.deep_equal()|.
Parameters~
{left} `(any)` First object.
{right} `(any)` Second object.
------------------------------------------------------------------------------
*MiniTest.expect.no_equality()*
`MiniTest.expect.no_equality`({left}, {right})
Expect no equality of two objects
Equality is tested via |vim.deep_equal()|.
Parameters~
{left} `(any)` First object.
{right} `(any)` Second object.
---------------------------
F438
---------------------------------------------------
*MiniTest.expect.error()*
`MiniTest.expect.error`({f}, {pattern}, {...})
Expect function call to raise error
Parameters~
{f} `(function)` Function to be tested for raising error.
{pattern} `(string|nil)` Pattern which error message should match.
Use `nil` or empty string to not test for pattern matching.
{...} `(any)` Extra arguments with which `f` will be called.
------------------------------------------------------------------------------
*MiniTest.expect.no_error()*
`MiniTest.expect.no_error`({f}, {...})
Expect function call to not raise error
Parameters~
{f} `(function)` Function to be tested for raising error.
{...} `(any)` Extra arguments with which `f` will be called.
------------------------------------------------------------------------------
*MiniTest.expect.reference_screenshot()*
`MiniTest.expect.reference_screenshot`({screenshot}, {path}, {opts})
Expect equality to reference screenshot
Parameters~
{screenshot} `(table|nil)` Array with screenshot information. Usually an output
of `child.get_screenshot()` (see |MiniTest-child-neovim.get_screenshot()|).
If `nil`, expectation passed.
{path} `(string|nil)` Path to reference screenshot. If `nil`, constructed
automatically in directory 'tests/screenshots' from current case info and
total number of times it was called inside current case. If there is no
file at `path`, it is created with content of `screenshot`.
{opts} `(table|nil)` Options:
- <force> - whether to forcefuly create reference screenshot.
Temporary useful during test writing. Default: `false`.
------------------------------------------------------------------------------
*MiniTest.new_expectation()*
`MiniTest.new_expectation`({subject}, {predicate}, {fail_context})
Create new expectation function
Helper for writing custom functions with behavior similar to other methods
of |MiniTest.expect|.
Parameters~
{subject} `(string|function)` Subject of expectation. If function, called with
expectation input arguments to produce string value.
{predicate} `(function)` Predicate function. Called with expectation input
arguments. Output `false` or `nil` means failed expectation.
{fail_context} `(string|function)` Information about fail. If function, called
with expectation input arguments to produce string value.
Return~
`(function)` Expectation function.
Usage~
>
local expect_truthy = MiniTest.new_expectation(
'truthy',
function(x) return x end,
function(x) return 'Object: ' .. vim.inspect(x) end
)
------------------------------------------------------------------------------
*MiniTest.gen_reporter*
`MiniTest.gen_reporter`
Table with pre-configured report generators
Each element is a function which returns reporter - table with callable
`start`, `update`, and `finish` fields.
------------------------------------------------------------------------------
*MiniTest.gen_reporter.buffer()*
`MiniTest.gen_reporter.buffer`({opts})
Generate buffer reporter
This is a default choice for interactive (not headless) usage. Opens a window
with dedicated non-terminal buffer and updates it with throttled redraws.
Opened buffer has the following helpful Normal mode mappings:
- `<Esc>` - stop test execution if executing (see |MiniTest.is_executing()|
and |MiniTest.stop()|). Close window otherwise.
- `q` - same as `<Esc>` for convenience and compatibility.
General idea:
- Group cases by concatenating first `opts.group_depth` elements of case
description (`desc` field). Groups by collected files if using default values.
- In `start()` show some stats to know how much is scheduled to be executed.
- In `update()` show symbolic overview of current group and state of current
case. Each symbol represents one case and its state:
- `?` - case didn't finish executing.
- `o` - pass.
- `O` - pass with notes.
- `x` - fail.
- `X` - fail with notes.
- In `finish()` show all fails and notes ordered by case.
Parameters~
{opts} `(table|nil)` Table with options. Used fields:
- <group_depth> - number of first elements of case description (can be zero)
used for grouping. Higher values mean higher granularity of output.
Default: 1.
- <throttle_delay> - minimum number of milliseconds to wait between
redrawing. Reduces screen flickering but not amount of computations.
Default: 10.
- <window> - definition of window to open. Can take one of the forms:
- Callable. It is called expecting output to be target window id
(current window is used if output is `nil`). Use this to open in
"normal" window (like `function() vim.cmd('vsplit') end`).
- Table. Used as `config` argument in |nvim_open_win()|.
Default: table for centered floating window.
------------------------------------------------------------------------------
*MiniTest.gen_reporter.stdout()*
`MiniTest.gen_reporter.stdout`({opts})
Generate stdout reporter
This is a default choice for headless usage. Writes to `stdout`. Uses
coloring ANSI escape sequences to make pretty and informative output
(should work in most modern terminals and continuous integration providers).
It has same general idea as |MiniTest.gen_reporter.buffer()| with slightly
less output (it doesn't overwrite previous text) to overcome typical
terminal limitations.
Parameters~
{opts} `(table|nil)` Table with options. Used fields:
- <group_depth> - number of first elements of case description (can be zero)
used for grouping. Higher values mean higher granularity of output.
Default: 1.
- <quit_on_finish> - whether to quit after finishing test execution.
Default: `true`.
------------------------------------------------------------------------------
*MiniTest.new_child_neovim()*
`MiniTest.new_child_neovim`()
Create child Neovim process
This creates an object designed to be a fundamental piece of 'mini.test'
methodology. It can start/stop/restart a separate (child) Neovim process in
full (non-headless) mode together with convenience helpers to interact with
it through |RPC| messages.
For more information see |MiniTest-child-neovim|.
Return~
`child` Object of |MiniTest-child-neovim|.
Usage~
>
-- Initiate
local child = MiniTest.new_child_neovim()
child.start()
-- Use API functions
child.api.nvim_buf_set_lines(0, 0, -1, true, { 'Line inside child Neovim' })
-- Execute Lua code, Vimscript commands, etc.
child.lua('_G.n = 0')
child.cmd('au CursorMoved * lua _G.n = _G.n + 1')
child.type_keys('l')
print(child.lua_get('_G.n')) -- Should be 1
-- Use other `vim.xxx` Lua wrappers (executed inside child process)
vim.b.aaa = 'current process'
child.b.aaa = 'child process'
print(child.lua_get('vim.b.aaa')) -- Should be 'child process'
-- Always stop process after it is not needed
child.stop()
------------------------------------------------------------------------------
*MiniTest-child-neovim*
Child class
It offers a great set of tools to write reliable and reproducible tests by
allowing to use fresh process in any test action. Interaction with it is done
through |RPC| protocol.
Although quite flexible, at the moment it has certain limitations:
- Doesn't allow using functions or userdata for child's both inputs and
outputs. Usual solution is to move computations from current Neovim process
to child process. Use `child.lua()` and `child.lua_get()` for that.
- When writing tests, it is common to end up with "hanging" process: it
stops executing without any output. Most of the time it is because Neovim
process is "blocked", i.e. it waits for user input and won't return from
other call (like `child.api.nvim_exec_lua()`). Common causes are active
|hit-enter-prompt| (increase prompt height to a bigger value) or
Operator-pending mode (exit it). To mitigate this experience, most helpers
will throw an error if its immediate execution will lead to hanging state.
Also in case of hanging state try `child.api_notify` instead of `child.api`.
Notes:
- An important type of field is a "redirection table". It acts as a
convenience wrapper for corresponding `vim.*` table. Can be used both to
return and set values. Examples:
- `child.api.nvim_buf_line_count(0)` will execute
`vim.api.nvim_buf_line_count(0)` inside child process and return its
output to current process.
- `child.bo.filetype = 'lua'` will execute `vim.bo.filetype = 'lua'`
inside child process.
They still have same limitations listed above, so are not perfect. In
case of a doubt, use `child.lua()`.
- Almost all methods use |vim.rpcrequest()| (i.e. wait for call to finish and
then return value). See for `*_notify` variant to use |vim.rpcnotify()|.
- All fields and methods should be called with `.`, not `:`.
Class~
{child}
Fields~
{start} `(function)` Start child process. See |MiniTest-child-neovim.start()|.
{stop} `(function)` Stop current child process.
{restart} `(function)` Restart child process: stop if running and then
start a new one. Takes same arguments as `child.start()` but uses values
from most recent `start()` call as defaults.
{type_keys} `(function)` Emulate typing keys.
See |MiniTest-child-neovim.type_keys()|. Doesn't check for blocked state.
{cmd} `(function)` Execute Vimscript code from a string.
A wrapper for |nvim_exec()| without capturing output.
{cmd_capture} `(function)` Execute Vimscript code from a string and
capture output. A wrapper for |nvim_exec()| with capturing output.
{lua} `(function)` Execute Lua code. A wrapper for |nvim_exec_lua()|.
{lua_get} `(function)` Execute Lua code and return result. A wrapper
for |nvim_exec_lua()| but prepends string code with `return`.
{is_blocked} `(function)` Check whether child process is blocked.
{is_running} `(function)` Check whether child process is currently running.
{ensure_nor
B9C2
mal_mode} `(function)` Ensure normal mode.
{get_screenshot} `(function)` Returns table with two "2d arrays" of single
characters representing what is displayed on screen and how it looks.
{job} `(table|nil)` Information about current job. If `nil`, child is not running.
{api} `(table)` Redirection table for `vim.api`. Doesn't check for blocked state.
{api_notify} `(table)` Same as `api`, but uses |vim.rpcnotify()|.
{diagnostic} `(table)` Redirection table for |vim.diagnostic|.
{fn} `(table)` Redirection table for |vim.fn|.
{highlight} `(table)` Redirection table for `vim.highlight` (|lua-highlight)|.
{json} `(table)` Redirection table for `vim.json`.
{loop} `(table)` Redirection table for |vim.loop|.
{lsp} `(table)` Redirection table for `vim.lsp` (|lsp-core)|.
{mpack} `(table)` Redirection table for |vim.mpack|.
{spell} `(table)` Redirection table for |vim.spell|.
{treesitter} `(table)` Redirection table for |vim.treesitter|.
{ui} `(table)` Redirection table for `vim.ui` (|lua-ui|). Currently of no
use because it requires sending function through RPC, which is impossible
at the moment.
{g} `(table)` Redirection table for |vim.g|.
{b} `(table)` Redirection table for |vim.b|.
{w} `(table)` Redirection table for |vim.w|.
{t} `(table)` Redirection table for |vim.t|.
{v} `(table)` Redirection table for |vim.v|.
{env} `(table)` Redirection table for |vim.env|.
{o} `(table)` Redirection table for |vim.o|.
{go} `(table)` Redirection table for |vim.go|.
{bo} `(table)` Redirection table for |vim.bo|.
{wo} `(table)` Redirection table for |vim.wo|.
------------------------------------------------------------------------------
*MiniTest-child-neovim.start()*
child.start(args, opts)~
Start child process and connect to it. Won't work if child is already running.
Parameters~
{args} `(table)` Array with arguments for executable. Will be prepended
with `{'--clean', '-n', '--listen', <some address>}` (see |startup-options|).
{opts} `(table)` Options:
- <nvim_executable> - name of Neovim executable. Default: |v:progpath|.
- <connection_timeout> - stop trying to connect after this amount of
milliseconds. Default: 5000.
Usage~
>
child = MiniTest.new_child_neovim()
-- Start default clean Neovim instance
child.start()
-- Start with custom 'init.lua' file
child.start({ '-u', 'scripts/minimal_init.lua' })
------------------------------------------------------------------------------
*MiniTest-child-neovim.type_keys()*
child.type_keys(wait, ...)~
Basically a wrapper for |nvim_input()| applied inside child process.
Differences:
- Can wait after each group of characters.
- Raises error if typing keys resulted into error in child process (i.e. its
|v:errmsg| was updated).
- Key '<' as separate entry may not be escaped as '<LT>'.
Parameters~
{wait} `(number)` Number of milliseconds to wait after each entry. May be
omitted, in which case no waiting is done.
{...} `(string|table<number,string>)` Separate entries for |nvim_input()|,
after which `wait` will be applied. Can be either string or array of strings.
Usage~
>
-- All of these type keys 'c', 'a', 'w'
child.type_keys('caw')
child.type_keys('c', 'a', 'w')
child.type_keys('c', { 'a', 'w' })
-- Waits 5 ms after `c` and after 'w'
child.type_keys(5, 'c', { 'a', 'w' })
-- Special keys can also be used
child.type_keys('i', 'Hello world', '<Esc>')
------------------------------------------------------------------------------
*MiniTest-child-neovim.get_screenshot()*
child.get_screenshot()~
Compute what is displayed on (default TUI) screen and how it is displayed.
This basically calls |screenstring()| and |screenattr()| for every visible
cell (row from 1 to 'lines', column from 1 to 'columns').
Notes:
- Due to implementation details of `screenstring()` and `screenattr()` in
Neovim<=0.7, this function won't recognize floating windows displayed on
screen. It will throw an error if there is a visible floating window. Use
Neovim>=0.8 (current nightly) to properly handle floating windows. Details:
- https://github.com/neovim/neovim/issues/19013
- https://github.com/neovim/neovim/pull/19020
- To make output more portable and visually useful, outputs of
`screenattr()` are coded with single character symbols. Those are taken from
94 characters (ASCII codes between 33 and 126), so there will be duplicates
in case of more than 94 different ways text is displayed on screen.
Return~
`(table|nil)` Screenshot table with the following fields:
- <text> - "2d array" (row-column) of single characters displayed at
particular cells.
- <attr> - "2d array" (row-column) of symbols representing how text is
displayed (basically, "coded" appearance/highlighting). They should be
used only in relation to each other: same/different symbols for two
cells mean same/different visual appearance. Note: there will be false
positives if there are more than 94 different attribute values.
It also can be used with `tostring()` to convert to single string (used
for writing to reference file). It results into two visual parts
(separated by empty line), for `text` and `attr`. Each part has "ruler"
above content and line numbers for each line.
Returns `nil` if couldn't get a reasonable screenshot.
Usage~
>
local screenshot = child.get_screenshot()
-- Show character displayed row=3 and column=4
print(screenshot.text[3][4])
-- Convert to string
tostring(screenshot)
vim:tw=78:ts=8:noet:ft=help:norl: