|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace RoaveTest\BackwardCompatibility\Command; |
|
6
|
|
|
|
|
7
|
|
|
use Assert\AssertionFailedException; |
|
8
|
|
|
use PHPUnit\Framework\MockObject\MockObject; |
|
9
|
|
|
use PHPUnit\Framework\TestCase; |
|
10
|
|
|
use Roave\BackwardCompatibility\Change; |
|
11
|
|
|
use Roave\BackwardCompatibility\Changes; |
|
12
|
|
|
use Roave\BackwardCompatibility\Command\AssertBackwardsCompatible; |
|
13
|
|
|
use Roave\BackwardCompatibility\CompareApi; |
|
14
|
|
|
use Roave\BackwardCompatibility\Factory\ComposerInstallationReflectorFactory; |
|
15
|
|
|
use Roave\BackwardCompatibility\Git\CheckedOutRepository; |
|
16
|
|
|
use Roave\BackwardCompatibility\Git\GetVersionCollection; |
|
17
|
|
|
use Roave\BackwardCompatibility\Git\ParseRevision; |
|
18
|
|
|
use Roave\BackwardCompatibility\Git\PerformCheckoutOfRevision; |
|
19
|
|
|
use Roave\BackwardCompatibility\Git\PickVersionFromVersionCollection; |
|
20
|
|
|
use Roave\BackwardCompatibility\Git\Revision; |
|
21
|
|
|
use Roave\BackwardCompatibility\LocateDependencies\LocateDependencies; |
|
22
|
|
|
use Roave\BackwardCompatibility\LocateSources\LocateSourcesViaComposerJson; |
|
23
|
|
|
use Roave\BetterReflection\BetterReflection; |
|
24
|
|
|
use Roave\BetterReflection\SourceLocator\Type\AggregateSourceLocator; |
|
25
|
|
|
use Symfony\Component\Console\Input\InputInterface; |
|
26
|
|
|
use Symfony\Component\Console\Output\ConsoleOutputInterface; |
|
27
|
|
|
use Symfony\Component\Console\Output\OutputInterface; |
|
28
|
|
|
use Version\Version; |
|
29
|
|
|
use Version\VersionCollection; |
|
30
|
|
|
use function Safe\chdir; |
|
31
|
|
|
use function Safe\realpath; |
|
32
|
|
|
use function sha1; |
|
33
|
|
|
use function uniqid; |
|
34
|
|
|
|
|
35
|
|
|
/** |
|
36
|
|
|
* @covers \Roave\BackwardCompatibility\Command\AssertBackwardsCompatible |
|
37
|
|
|
*/ |
|
38
|
|
|
final class AssertBackwardsCompatibleTest extends TestCase |
|
39
|
|
|
{ |
|
40
|
|
|
/** @var CheckedOutRepository */ |
|
41
|
|
|
private $sourceRepository; |
|
42
|
|
|
|
|
43
|
|
|
/** @var InputInterface&MockObject */ |
|
44
|
|
|
private $input; |
|
45
|
|
|
|
|
46
|
|
|
/** @var ConsoleOutputInterface&MockObject */ |
|
47
|
|
|
private $output; |
|
48
|
|
|
|
|
49
|
|
|
/** @var OutputInterface&MockObject */ |
|
50
|
|
|
private $stdErr; |
|
51
|
|
|
|
|
52
|
|
|
/** @var PerformCheckoutOfRevision&MockObject */ |
|
53
|
|
|
private $performCheckout; |
|
54
|
|
|
|
|
55
|
|
|
/** @var ParseRevision&MockObject */ |
|
56
|
|
|
private $parseRevision; |
|
57
|
|
|
|
|
58
|
|
|
/** @var GetVersionCollection&MockObject */ |
|
59
|
|
|
private $getVersions; |
|
60
|
|
|
|
|
61
|
|
|
/** @var PickVersionFromVersionCollection&MockObject */ |
|
62
|
|
|
private $pickVersion; |
|
63
|
|
|
|
|
64
|
|
|
/** @var LocateDependencies&MockObject */ |
|
65
|
|
|
private $locateDependencies; |
|
66
|
|
|
|
|
67
|
|
|
/** @var CompareApi&MockObject */ |
|
68
|
|
|
private $compareApi; |
|
69
|
|
|
|
|
70
|
|
|
/** @var AggregateSourceLocator */ |
|
71
|
|
|
private $dependencies; |
|
72
|
|
|
|
|
73
|
|
|
/** @var AssertBackwardsCompatible */ |
|
74
|
|
|
private $compare; |
|
75
|
|
|
|
|
76
|
|
|
public function setUp() : void |
|
77
|
|
|
{ |
|
78
|
|
|
$repositoryPath = realpath(__DIR__ . '/../../../'); |
|
79
|
|
|
|
|
80
|
|
|
$this->sourceRepository = CheckedOutRepository::fromPath($repositoryPath); |
|
81
|
|
|
|
|
82
|
|
|
chdir($this->sourceRepository->__toString()); |
|
83
|
|
|
|
|
84
|
|
|
$this->input = $this->createMock(InputInterface::class); |
|
85
|
|
|
$this->output = $this->createMock(ConsoleOutputInterface::class); |
|
86
|
|
|
$this->stdErr = $this->createMock(OutputInterface::class); |
|
87
|
|
|
$this->performCheckout = $this->createMock(PerformCheckoutOfRevision::class); |
|
88
|
|
|
$this->parseRevision = $this->createMock(ParseRevision::class); |
|
89
|
|
|
$this->getVersions = $this->createMock(GetVersionCollection::class); |
|
90
|
|
|
$this->pickVersion = $this->createMock(PickVersionFromVersionCollection::class); |
|
91
|
|
|
$this->locateDependencies = $this->createMock(LocateDependencies::class); |
|
92
|
|
|
$this->dependencies = new AggregateSourceLocator(); |
|
93
|
|
|
$this->compareApi = $this->createMock(CompareApi::class); |
|
94
|
|
|
$this->compare = new AssertBackwardsCompatible( |
|
95
|
|
|
$this->performCheckout, |
|
96
|
|
|
new ComposerInstallationReflectorFactory(new LocateSourcesViaComposerJson((new BetterReflection())->astLocator())), |
|
97
|
|
|
$this->parseRevision, |
|
98
|
|
|
$this->getVersions, |
|
99
|
|
|
$this->pickVersion, |
|
100
|
|
|
$this->locateDependencies, |
|
101
|
|
|
$this->compareApi |
|
102
|
|
|
); |
|
103
|
|
|
|
|
104
|
|
|
$this |
|
105
|
|
|
->output |
|
106
|
|
|
->expects(self::any()) |
|
107
|
|
|
->method('getErrorOutput') |
|
108
|
|
|
->willReturn($this->stdErr); |
|
109
|
|
|
} |
|
110
|
|
|
|
|
111
|
|
|
public function testDefinition() : void |
|
112
|
|
|
{ |
|
113
|
|
|
self::assertSame( |
|
114
|
|
|
'roave-backwards-compatibility-check:assert-backwards-compatible', |
|
115
|
|
|
$this->compare->getName() |
|
116
|
|
|
); |
|
117
|
|
|
|
|
118
|
|
|
$usages = $this->compare->getUsages(); |
|
119
|
|
|
|
|
120
|
|
|
self::assertCount(1, $usages); |
|
121
|
|
|
self::assertStringStartsWith( |
|
122
|
|
|
'roave-backwards-compatibility-check:assert-backwards-compatible', |
|
123
|
|
|
$usages[0] |
|
124
|
|
|
); |
|
125
|
|
|
self::assertStringContainsString('Without arguments, this command will attempt to detect', $usages[0]); |
|
126
|
|
|
self::assertStringStartsWith('Verifies that the revision being', $this->compare->getDescription()); |
|
127
|
|
|
|
|
128
|
|
|
self::assertSame( |
|
129
|
|
|
'[--from [FROM]] [--to TO] [--format [FORMAT]]', |
|
130
|
|
|
$this->compare |
|
131
|
|
|
->getDefinition() |
|
132
|
|
|
->getSynopsis() |
|
133
|
|
|
); |
|
134
|
|
|
} |
|
135
|
|
|
|
|
136
|
|
|
public function testExecuteWhenRevisionsAreProvidedAsOptions() : void |
|
137
|
|
|
{ |
|
138
|
|
|
$fromSha = sha1('fromRevision', false); |
|
139
|
|
|
$toSha = sha1('toRevision', false); |
|
140
|
|
|
|
|
141
|
|
|
$this->input->expects(self::any())->method('getOption')->willReturnMap([ |
|
142
|
|
|
['from', $fromSha], |
|
143
|
|
|
['to', $toSha], |
|
144
|
|
|
]); |
|
145
|
|
|
$this->input->expects(self::any())->method('getArgument')->willReturnMap([ |
|
146
|
|
|
['sources-path', 'src'], |
|
147
|
|
|
]); |
|
148
|
|
|
|
|
149
|
|
|
$this->performCheckout->expects(self::at(0)) |
|
150
|
|
|
->method('checkout') |
|
151
|
|
|
->with($this->sourceRepository, $fromSha) |
|
152
|
|
|
->willReturn($this->sourceRepository); |
|
153
|
|
|
$this->performCheckout->expects(self::at(1)) |
|
154
|
|
|
->method('checkout') |
|
155
|
|
|
->with($this->sourceRepository, $toSha) |
|
156
|
|
|
->willReturn($this->sourceRepository); |
|
157
|
|
|
$this->performCheckout->expects(self::at(2)) |
|
158
|
|
|
->method('remove') |
|
159
|
|
|
->with($this->sourceRepository); |
|
160
|
|
|
$this->performCheckout->expects(self::at(3)) |
|
161
|
|
|
->method('remove') |
|
162
|
|
|
->with($this->sourceRepository); |
|
163
|
|
|
|
|
164
|
|
|
$this->parseRevision->expects(self::at(0)) |
|
165
|
|
|
->method('fromStringForRepository') |
|
166
|
|
|
->with($fromSha) |
|
167
|
|
|
->willReturn(Revision::fromSha1($fromSha)); |
|
168
|
|
|
$this->parseRevision->expects(self::at(1)) |
|
169
|
|
|
->method('fromStringForRepository') |
|
170
|
|
|
->with($toSha) |
|
171
|
|
|
->willReturn(Revision::fromSha1($toSha)); |
|
172
|
|
|
|
|
173
|
|
|
$this |
|
174
|
|
|
->locateDependencies |
|
175
|
|
|
->expects(self::any()) |
|
176
|
|
|
->method('__invoke') |
|
177
|
|
|
->with((string) $this->sourceRepository) |
|
178
|
|
|
->willReturn($this->dependencies); |
|
179
|
|
|
|
|
180
|
|
|
$this->compareApi->expects(self::once())->method('__invoke')->willReturn(Changes::empty()); |
|
181
|
|
|
|
|
182
|
|
|
self::assertSame(0, $this->compare->execute($this->input, $this->output)); |
|
183
|
|
|
} |
|
184
|
|
|
|
|
185
|
|
|
public function testExecuteReturnsNonZeroExitCodeWhenChangesAreDetected() : void |
|
186
|
|
|
{ |
|
187
|
|
|
$fromSha = sha1('fromRevision', false); |
|
188
|
|
|
$toSha = sha1('toRevision', false); |
|
189
|
|
|
|
|
190
|
|
|
$this->input->expects(self::any())->method('getOption')->willReturnMap([ |
|
191
|
|
|
['from', $fromSha], |
|
192
|
|
|
['to', $toSha], |
|
193
|
|
|
]); |
|
194
|
|
|
$this->input->expects(self::any())->method('getArgument')->willReturnMap([ |
|
195
|
|
|
['sources-path', 'src'], |
|
196
|
|
|
]); |
|
197
|
|
|
|
|
198
|
|
|
$this->performCheckout->expects(self::at(0)) |
|
199
|
|
|
->method('checkout') |
|
200
|
|
|
->with($this->sourceRepository, $fromSha) |
|
201
|
|
|
->willReturn($this->sourceRepository); |
|
202
|
|
|
$this->performCheckout->expects(self::at(1)) |
|
203
|
|
|
->method('checkout') |
|
204
|
|
|
->with($this->sourceRepository, $toSha) |
|
205
|
|
|
->willReturn($this->sourceRepository); |
|
206
|
|
|
$this->performCheckout->expects(self::at(2)) |
|
207
|
|
|
->method('remove') |
|
208
|
|
|
->with($this->sourceRepository); |
|
209
|
|
|
$this->performCheckout->expects(self::at(3)) |
|
210
|
|
|
->method('remove') |
|
211
|
|
|
->with($this->sourceRepository); |
|
212
|
|
|
|
|
213
|
|
|
$this->parseRevision->expects(self::at(0)) |
|
214
|
|
|
->method('fromStringForRepository') |
|
215
|
|
|
->with($fromSha) |
|
216
|
|
|
->willReturn(Revision::fromSha1($fromSha)); |
|
217
|
|
|
$this->parseRevision->expects(self::at(1)) |
|
218
|
|
|
->method('fromStringForRepository') |
|
219
|
|
|
->with($toSha) |
|
220
|
|
|
->willReturn(Revision::fromSha1($toSha)); |
|
221
|
|
|
|
|
222
|
|
|
$this |
|
223
|
|
|
->locateDependencies |
|
224
|
|
|
->expects(self::any()) |
|
225
|
|
|
->method('__invoke') |
|
226
|
|
|
->with((string) $this->sourceRepository) |
|
227
|
|
|
->willReturn($this->dependencies); |
|
228
|
|
|
|
|
229
|
|
|
$this->compareApi->expects(self::once())->method('__invoke')->willReturn(Changes::fromList( |
|
230
|
|
|
Change::added(uniqid('added', true), true) |
|
231
|
|
|
)); |
|
232
|
|
|
|
|
233
|
|
|
$this |
|
234
|
|
|
->stdErr |
|
235
|
|
|
->expects(self::exactly(3)) |
|
236
|
|
|
->method('writeln') |
|
237
|
|
|
->with(self::logicalOr( |
|
238
|
|
|
self::matches('Comparing from %a to %a...'), |
|
239
|
|
|
self::matches('[BC] ADDED: added%a'), |
|
240
|
|
|
self::matches('<error>1 backwards-incompatible changes detected</error>') |
|
241
|
|
|
)); |
|
242
|
|
|
|
|
243
|
|
|
self::assertSame(3, $this->compare->execute($this->input, $this->output)); |
|
244
|
|
|
} |
|
245
|
|
|
|
|
246
|
|
|
public function testProvidingMarkdownOptionWritesMarkdownOutput() : void |
|
247
|
|
|
{ |
|
248
|
|
|
$fromSha = sha1('fromRevision', false); |
|
249
|
|
|
$toSha = sha1('toRevision', false); |
|
250
|
|
|
|
|
251
|
|
|
$this->input->expects(self::any())->method('getOption')->willReturnMap([ |
|
252
|
|
|
['from', $fromSha], |
|
253
|
|
|
['to', $toSha], |
|
254
|
|
|
['format', ['markdown']], |
|
255
|
|
|
]); |
|
256
|
|
|
$this->input->expects(self::any())->method('getArgument')->willReturnMap([ |
|
257
|
|
|
['sources-path', 'src'], |
|
258
|
|
|
]); |
|
259
|
|
|
|
|
260
|
|
|
$this->performCheckout->expects(self::at(0)) |
|
261
|
|
|
->method('checkout') |
|
262
|
|
|
->with($this->sourceRepository, $fromSha) |
|
263
|
|
|
->willReturn($this->sourceRepository); |
|
264
|
|
|
$this->performCheckout->expects(self::at(1)) |
|
265
|
|
|
->method('checkout') |
|
266
|
|
|
->with($this->sourceRepository, $toSha) |
|
267
|
|
|
->willReturn($this->sourceRepository); |
|
268
|
|
|
$this->performCheckout->expects(self::at(2)) |
|
269
|
|
|
->method('remove') |
|
270
|
|
|
->with($this->sourceRepository); |
|
271
|
|
|
$this->performCheckout->expects(self::at(3)) |
|
272
|
|
|
->method('remove') |
|
273
|
|
|
->with($this->sourceRepository); |
|
274
|
|
|
|
|
275
|
|
|
$this->parseRevision->expects(self::at(0)) |
|
276
|
|
|
->method('fromStringForRepository') |
|
277
|
|
|
->with($fromSha) |
|
278
|
|
|
->willReturn(Revision::fromSha1($fromSha)); |
|
279
|
|
|
$this->parseRevision->expects(self::at(1)) |
|
280
|
|
|
->method('fromStringForRepository') |
|
281
|
|
|
->with($toSha) |
|
282
|
|
|
->willReturn(Revision::fromSha1($toSha)); |
|
283
|
|
|
|
|
284
|
|
|
$this |
|
285
|
|
|
->locateDependencies |
|
286
|
|
|
->method('__invoke') |
|
|
|
|
|
|
287
|
|
|
->with((string) $this->sourceRepository) |
|
288
|
|
|
->willReturn($this->dependencies); |
|
289
|
|
|
|
|
290
|
|
|
$changeToExpect = uniqid('changeToExpect', true); |
|
291
|
|
|
$this->compareApi->expects(self::once())->method('__invoke')->willReturn(Changes::fromList( |
|
292
|
|
|
Change::removed($changeToExpect, true) |
|
293
|
|
|
)); |
|
294
|
|
|
|
|
295
|
|
|
$this->output |
|
296
|
|
|
->expects(self::once()) |
|
297
|
|
|
->method('writeln') |
|
298
|
|
|
->willReturnCallback(static function (string $output) use ($changeToExpect) : void { |
|
299
|
|
|
self::assertStringContainsString(' [BC] ' . $changeToExpect, $output); |
|
300
|
|
|
}); |
|
301
|
|
|
|
|
302
|
|
|
$this->compare->execute($this->input, $this->output); |
|
303
|
|
|
} |
|
304
|
|
|
|
|
305
|
|
|
public function testExecuteWithDefaultRevisionsNotProvidedAndNoDetectedTags() : void |
|
306
|
|
|
{ |
|
307
|
|
|
$this->input->expects(self::any())->method('getOption')->willReturnMap([ |
|
308
|
|
|
['from', null], |
|
309
|
|
|
['to', 'HEAD'], |
|
310
|
|
|
]); |
|
311
|
|
|
$this->input->expects(self::any())->method('getArgument')->willReturnMap([ |
|
312
|
|
|
['sources-path', 'src'], |
|
313
|
|
|
]); |
|
314
|
|
|
|
|
315
|
|
|
$this |
|
316
|
|
|
->performCheckout |
|
317
|
|
|
->expects(self::never()) |
|
318
|
|
|
->method('checkout'); |
|
319
|
|
|
$this |
|
320
|
|
|
->parseRevision |
|
321
|
|
|
->expects(self::never()) |
|
322
|
|
|
->method('fromStringForRepository'); |
|
323
|
|
|
|
|
324
|
|
|
$this |
|
325
|
|
|
->getVersions |
|
326
|
|
|
->expects(self::once()) |
|
327
|
|
|
->method('fromRepository') |
|
328
|
|
|
->willReturn(new VersionCollection()); |
|
329
|
|
|
$this |
|
330
|
|
|
->pickVersion |
|
331
|
|
|
->expects(self::never()) |
|
332
|
|
|
->method('forVersions'); |
|
333
|
|
|
$this |
|
334
|
|
|
->compareApi |
|
335
|
|
|
->expects(self::never()) |
|
336
|
|
|
->method('__invoke'); |
|
337
|
|
|
|
|
338
|
|
|
$this->expectException(AssertionFailedException::class); |
|
339
|
|
|
|
|
340
|
|
|
$this->compare->execute($this->input, $this->output); |
|
341
|
|
|
} |
|
342
|
|
|
|
|
343
|
|
|
/** |
|
344
|
|
|
* @dataProvider validVersionCollections |
|
345
|
|
|
*/ |
|
346
|
|
|
public function testExecuteWithDefaultRevisionsNotProvided(VersionCollection $versions) : void |
|
347
|
|
|
{ |
|
348
|
|
|
$fromSha = sha1('fromRevision', false); |
|
349
|
|
|
$toSha = sha1('toRevision', false); |
|
350
|
|
|
$pickedVersion = Version::fromString('1.0.0'); |
|
351
|
|
|
|
|
352
|
|
|
$this->input->expects(self::any())->method('getOption')->willReturnMap([ |
|
353
|
|
|
['from', null], |
|
354
|
|
|
['to', 'HEAD'], |
|
355
|
|
|
]); |
|
356
|
|
|
$this->input->expects(self::any())->method('getArgument')->willReturnMap([ |
|
357
|
|
|
['sources-path', 'src'], |
|
358
|
|
|
]); |
|
359
|
|
|
|
|
360
|
|
|
$this->performCheckout->expects(self::at(0)) |
|
361
|
|
|
->method('checkout') |
|
362
|
|
|
->with($this->sourceRepository, $fromSha) |
|
363
|
|
|
->willReturn($this->sourceRepository); |
|
364
|
|
|
$this->performCheckout->expects(self::at(1)) |
|
365
|
|
|
->method('checkout') |
|
366
|
|
|
->with($this->sourceRepository, $toSha) |
|
367
|
|
|
->willReturn($this->sourceRepository); |
|
368
|
|
|
$this->performCheckout->expects(self::at(2)) |
|
369
|
|
|
->method('remove') |
|
370
|
|
|
->with($this->sourceRepository); |
|
371
|
|
|
$this->performCheckout->expects(self::at(3)) |
|
372
|
|
|
->method('remove') |
|
373
|
|
|
->with($this->sourceRepository); |
|
374
|
|
|
|
|
375
|
|
|
$this->parseRevision->expects(self::at(0)) |
|
376
|
|
|
->method('fromStringForRepository') |
|
377
|
|
|
->with((string) $pickedVersion) |
|
378
|
|
|
->willReturn(Revision::fromSha1($fromSha)); |
|
379
|
|
|
$this->parseRevision->expects(self::at(1)) |
|
380
|
|
|
->method('fromStringForRepository') |
|
381
|
|
|
->with('HEAD') |
|
382
|
|
|
->willReturn(Revision::fromSha1($toSha)); |
|
383
|
|
|
|
|
384
|
|
|
$this->getVersions->expects(self::once()) |
|
385
|
|
|
->method('fromRepository') |
|
386
|
|
|
->with(self::callback(function (CheckedOutRepository $checkedOutRepository) : bool { |
|
387
|
|
|
self::assertEquals($this->sourceRepository, $checkedOutRepository); |
|
388
|
|
|
|
|
389
|
|
|
return true; |
|
390
|
|
|
})) |
|
391
|
|
|
->willReturn($versions); |
|
392
|
|
|
$this->pickVersion->expects(self::once()) |
|
393
|
|
|
->method('forVersions') |
|
394
|
|
|
->with($versions) |
|
395
|
|
|
->willReturn($pickedVersion); |
|
396
|
|
|
|
|
397
|
|
|
$this |
|
398
|
|
|
->stdErr |
|
399
|
|
|
->expects(self::exactly(3)) |
|
400
|
|
|
->method('writeln') |
|
401
|
|
|
->with(self::logicalOr( |
|
402
|
|
|
'Detected last minor version: 1.0.0', |
|
403
|
|
|
self::matches('Comparing from %a to %a...'), |
|
404
|
|
|
self::matches('<info>No backwards-incompatible changes detected</info>') |
|
405
|
|
|
)); |
|
406
|
|
|
|
|
407
|
|
|
$this->compareApi->expects(self::once())->method('__invoke')->willReturn(Changes::empty()); |
|
408
|
|
|
|
|
409
|
|
|
self::assertSame(0, $this->compare->execute($this->input, $this->output)); |
|
410
|
|
|
} |
|
411
|
|
|
|
|
412
|
|
|
/** @return VersionCollection[][] */ |
|
413
|
|
|
public function validVersionCollections() : array |
|
414
|
|
|
{ |
|
415
|
|
|
return [ |
|
416
|
|
|
[new VersionCollection( |
|
417
|
|
|
Version::fromString('1.0.0'), |
|
418
|
|
|
Version::fromString('1.0.1'), |
|
419
|
|
|
Version::fromString('1.0.2') |
|
420
|
|
|
), |
|
421
|
|
|
], |
|
422
|
|
|
[new VersionCollection( |
|
423
|
|
|
Version::fromString('1.0.0'), |
|
424
|
|
|
Version::fromString('1.0.1') |
|
425
|
|
|
), |
|
426
|
|
|
], |
|
427
|
|
|
[new VersionCollection(Version::fromString('1.0.0'))], |
|
428
|
|
|
]; |
|
429
|
|
|
} |
|
430
|
|
|
} |
|
431
|
|
|
|
Roave /
BackwardCompatibilityCheck
This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces.
This is most likely a typographical error or the method has been renamed.