@@ -215,7 +215,7 @@ describe('addExceptionMechanism', () => {
215215
216216 addExceptionMechanism ( event ) ;
217217
218- expect ( event . exception . values [ 0 ] ? .mechanism ) . toEqual ( defaultMechanism ) ;
218+ expect ( event . exception . values [ 0 ] . mechanism ) . toEqual ( defaultMechanism ) ;
219219 } ) ;
220220
221221 it ( 'prefers current values to defaults' , ( ) => {
@@ -226,7 +226,7 @@ describe('addExceptionMechanism', () => {
226226
227227 addExceptionMechanism ( event ) ;
228228
229- expect ( event . exception . values [ 0 ] ? .mechanism ) . toEqual ( nonDefaultMechanism ) ;
229+ expect ( event . exception . values [ 0 ] . mechanism ) . toEqual ( nonDefaultMechanism ) ;
230230 } ) ;
231231
232232 it ( 'prefers incoming values to current values' , ( ) => {
@@ -239,7 +239,7 @@ describe('addExceptionMechanism', () => {
239239 addExceptionMechanism ( event , newMechanism ) ;
240240
241241 // the new `handled` value took precedence
242- expect ( event . exception . values [ 0 ] ? .mechanism ) . toEqual ( { type : 'instrument' , handled : true , synthetic : true } ) ;
242+ expect ( event . exception . values [ 0 ] . mechanism ) . toEqual ( { type : 'instrument' , handled : true , synthetic : true } ) ;
243243 } ) ;
244244
245245 it ( 'merges data values' , ( ) => {
@@ -251,7 +251,7 @@ describe('addExceptionMechanism', () => {
251251
252252 addExceptionMechanism ( event , newMechanism ) ;
253253
254- expect ( event . exception . values [ 0 ] ? .mechanism . data ) . toEqual ( {
254+ expect ( event . exception . values [ 0 ] . mechanism . data ) . toEqual ( {
255255 function : 'addEventListener' ,
256256 handler : 'organizeShoes' ,
257257 target : 'closet' ,
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