test: improve watch.

test/watch.js

@@ -1,6 +1,7 @@
 
 var lib = require('./_lib')
 var inst = require('./_inst')
+var stream = require('./_stream')
 
 describe('watch', () =>
 {
@@ -15,4 +16,68 @@ describe('watch', () =>
 	{
 		inst(watch, 'watch')
 	})
+
+	describe('works', () =>
+	{
+		/*
+			This test case only ensures that stream is working,
+			it does not test watch engine itself.
+			The watch functionality provided by `chokidar`,
+			please consult its tests for details
+			https://www.npmjs.com/package/chokidar
+		 */
+		var lil = __dirname + '/lil-fs'
+
+		it('watch(string)', () =>
+		{
+			var s = watch('*', { cwd: lil })
+
+			setTimeout(() => s.end(true), 250)
+
+			return stream.streamEquals(s,
+			[
+				[ 'addDir', 'dir' ],
+				[ 'add', 'file-2.txt' ],
+				[ 'add', 'file.txt' ]
+			])
+		})
+
+		it('watch(string)', () =>
+		{
+			var s = watch('**/*', { cwd: lil })
+
+			setTimeout(() => s.end(true), 250)
+
+			return stream.streamEquals(s,
+			[
+				[ 'addDir', 'dir' ],
+				[ 'add', 'file-2.txt' ],
+				[ 'add', 'file.txt' ],
+				[ 'add', 'dir/file.txt' ]
+			])
+		})
+
+		it('watch(array of strings)', () =>
+		{
+			var s = watch([ '*.txt', '*/*' ], { cwd: lil })
+
+			setTimeout(() => s.end(true), 250)
+
+			return stream.streamEquals(s,
+			[
+				[ 'add', 'file-2.txt' ],
+				[ 'add', 'file.txt' ],
+				[ 'add', 'dir/file.txt' ]
+			])
+		})
+
+		it('watch(empty array)', () =>
+		{
+			var s = watch([], { cwd: lil })
+
+			setTimeout(() => s.end(true), 250)
+
+			return stream.streamEquals(s, [])
+		})
+	})
 })