@@ -183,4 +183,126 @@ describe('Launcher', () => {
183183 const chromeInstance = new Launcher ( { chromePath : '' } ) ;
184184 chromeInstance . launch ( ) . catch ( ( ) => done ( ) ) ;
185185 } ) ;
186+
187+ describe ( 'waitForTarget method' , ( ) => {
188+ function getChromeInstance ( targetList : unknown , waitForInspectableTarget ?: number ) {
189+ const chromeInstance = new Launcher ( { waitForInspectableTarget : typeof waitForInspectableTarget === 'number' ? waitForInspectableTarget : 100 } ) ;
190+ const getTargetListStub = stub ( chromeInstance , 'getTargetList' ) . returns ( Promise . resolve ( targetList ) ) ;
191+
192+ return {
193+ chromeInstance,
194+ getTargetListStub
195+ } ;
196+ }
197+
198+ it ( 'returns promise that is resolved with the same value as promise returned by getTargetList method' , ( ) => {
199+ const response = {
200+ body : [ 'test' , 'list' ]
201+ } ;
202+ const { chromeInstance, getTargetListStub} = getChromeInstance ( response ) ;
203+
204+ return chromeInstance . waitForTarget ( ) . then ( ( result ) => {
205+ assert . ok ( getTargetListStub . calledOnce ) ;
206+ assert . strictEqual ( result , response ) ;
207+ } ) ;
208+ } ) ;
209+
210+ it ( 'returns promise that is resolved with the same value as promise returned by getTargetList method after interval specified in waitForInspectableTarget option' , ( ) => {
211+ const response = {
212+ body : [ ]
213+ } ;
214+ const waitTime = 90 ;
215+ const { chromeInstance, getTargetListStub} = getChromeInstance ( response , waitTime ) ;
216+ chromeInstance . getTargetRetryTimeout = 50 ;
217+ const startTime = new Date ( ) . getTime ( ) ;
218+
219+ return chromeInstance . waitForTarget ( ) . then ( ( result ) => {
220+ assert . ok ( getTargetListStub . callCount === 3 ) ;
221+ assert . ok ( new Date ( ) . getTime ( ) - startTime > waitTime ) ;
222+ assert . strictEqual ( result , response ) ;
223+ } ) ;
224+ } ) ;
225+
226+ it ( 'returns promise that is rejected with the same value as promise returned by getTargetList method after interval specified in waitForInspectableTarget option' , ( ) => {
227+ const reason = 'No target' ;
228+ const waitTime = 100 ;
229+ const { chromeInstance, getTargetListStub} = getChromeInstance ( Promise . reject ( reason ) , waitTime ) ;
230+ chromeInstance . getTargetRetryTimeout = 40 ;
231+ const startTime = new Date ( ) . getTime ( ) ;
232+
233+ return chromeInstance . waitForTarget ( ) . catch ( ( result ) => {
234+ assert . ok ( getTargetListStub . callCount === 4 ) ;
235+ assert . ok ( new Date ( ) . getTime ( ) - startTime > waitTime ) ;
236+ assert . strictEqual ( result , reason ) ;
237+ } ) ;
238+ } ) ;
239+ } ) ;
240+
241+ describe ( 'waitForInspectableTarget option' , ( ) => {
242+ function getChromeInstance ( options ?: Options ) {
243+ const chromeInstance = new Launcher ( options ) ;
244+ stub ( chromeInstance , 'isDebuggerReady' ) . returns ( Promise . resolve ( ) ) ;
245+
246+ return chromeInstance ;
247+ }
248+
249+ it ( 'waitUntilReady does not call waitForTarget method when the option is not set' , ( ) => {
250+ const chromeInstance = getChromeInstance ( ) ;
251+ const waitForTargetSpy = spy ( chromeInstance , 'waitForTarget' ) ;
252+
253+ return chromeInstance . waitUntilReady ( ) . then ( ( ) => {
254+ assert . ok ( waitForTargetSpy . notCalled ) ;
255+ } ) ;
256+ } ) ;
257+
258+ it ( 'waitUntilReady does not call waitForTarget method when 0 is set for the option' , ( ) => {
259+ const chromeInstance = getChromeInstance ( { waitForInspectableTarget : 0 } ) ;
260+ const waitForTargetSpy = spy ( chromeInstance , 'waitForTarget' ) ;
261+
262+ return chromeInstance . waitUntilReady ( ) . then ( ( ) => {
263+ assert . ok ( waitForTargetSpy . notCalled ) ;
264+ } ) ;
265+ } ) ;
266+
267+ it ( 'waitUntilReady does not call waitForTarget method when negative value is set for the option' , ( ) => {
268+ const chromeInstance = getChromeInstance ( { waitForInspectableTarget : - 1 } ) ;
269+ const waitForTargetSpy = spy ( chromeInstance , 'waitForTarget' ) ;
270+
271+ return chromeInstance . waitUntilReady ( ) . then ( ( ) => {
272+ assert . ok ( waitForTargetSpy . notCalled ) ;
273+ } ) ;
274+ } ) ;
275+
276+ it ( 'waitUntilReady calls waitForTarget method when the option is set' , ( ) => {
277+ const chromeInstance = getChromeInstance ( { waitForInspectableTarget : 1000 } ) ;
278+ const response = {
279+ body : [ {
280+ description : '' ,
281+ devtoolsFrontendUrl : '/devtools/inspector.html?ws=127.0.0.1:54321/devtools/page/1C2C62A45591F2DECB9CC50E7C3B1FA5' ,
282+ id : '1C2C62A45591F2DECB9CC50E7C3B1FA5' ,
283+ title : '' ,
284+ type : 'page' ,
285+ url : 'about:blank' ,
286+ webSocketDebuggerUrl : 'ws://127.0.0.1:54321/devtools/page/1C2C62A45591F2DECB9CC50E7C3B1FA5'
287+ } ]
288+ } ;
289+ const waitForTargetStub = stub ( chromeInstance , 'waitForTarget' ) . returns ( Promise . resolve ( response ) ) ;
290+
291+ return chromeInstance . waitUntilReady ( ) . then ( ( result ) => {
292+ assert . ok ( waitForTargetStub . calledOnce ) ;
293+ assert . deepEqual ( result , response . body ) ;
294+ } ) ;
295+ } ) ;
296+
297+ it ( 'waitUntilReady rejects when waitForTarget method returns rejected promise' , ( ) => {
298+ const chromeInstance = getChromeInstance ( { waitForInspectableTarget : 1 } ) ;
299+ const reason = 'No targets' ;
300+ const waitForTargetStub = stub ( chromeInstance , 'waitForTarget' ) . returns ( Promise . reject ( reason ) ) ;
301+
302+ return chromeInstance . waitUntilReady ( ) . catch ( ( result ) => {
303+ assert . ok ( waitForTargetStub . calledOnce ) ;
304+ assert . strictEqual ( result , reason ) ;
305+ } ) ;
306+ } ) ;
307+ } ) ;
186308} ) ;
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