test: add tests for watcher check filter

Signed-off-by: Robin Appelman <[email protected]>

[skip ci]

Author: icewind1991

tests/lib/Files/Cache/WatcherTest.php

@@ -191,4 +191,43 @@ private function getTestStorage($scan = true) {
 		$this->storages[] = $storage;
 		return $storage;
 	}
+
+	public static function checkFilterProvider(): array {
+		return [
+			[null, [
+				'' => true,
+				'foo' => true,
+				'foo.txt' => true,
+			]],
+			['/^.+$/', [
+				'' => false,
+				'foo' => true,
+				'foo.txt' => true,
+			]],
+			['/^.+\..+$/', [
+				'' => false,
+				'foo' => false,
+				'foo.txt' => true,
+			]]
+		];
+	}
+
+	#[DataProvider('checkFilterProvider')]
+	public function testCheckFilter($filter, $paths) {
+		$storage = $this->createMock(IStorage::class);
+		$storage->method('hasUpdated')
+			->willReturn(true);
+		$watcher = new Watcher($storage);
+		$watcher->setPolicy(IWatcher::CHECK_ALWAYS);
+
+		$watcher->setCheckFilter($filter);
+
+		$entry = new CacheEntry([
+			'storage_mtime' => 0,
+		]);
+
+		foreach ($paths as $patch => $shouldUpdate) {
+			$this->assertEquals($shouldUpdate, $watcher->needsUpdate($patch, $entry));
+		}
+	}
 }