Tests that the expected events are received.
Background Fetch Success:
[
    [0] : {
        eventMetadata : [
            [0] : {
                key : Start Paused
                value : No
            }
            [1] : {
                key : Total Requests
                value : 1
            }
        ]
        eventName : Background Fetch registered
        instanceId : my-fetch-success
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [1] : {
        eventMetadata : [
        ]
        eventName : Background Fetch started
        instanceId : my-fetch-success
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [2] : {
        eventMetadata : [
            [0] : {
                key : Request Index
                value : 0
            }
            [1] : {
                key : URL
                value : http://127.0.0.1:8000/inspector-protocol/background-services/resources/background-fetch.txt
            }
        ]
        eventName : Request processing started
        instanceId : my-fetch-success
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [3] : {
        eventMetadata : [
            [0] : {
                key : Request Index
                value : 0
            }
            [1] : {
                key : Response Size (bytes)
                value : 16
            }
            [2] : {
                key : Response Status
                value : 200
            }
            [3] : {
                key : URL
                value : http://127.0.0.1:8000/inspector-protocol/background-services/resources/background-fetch.txt
            }
        ]
        eventName : Request processing completed
        instanceId : my-fetch-success
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [4] : {
        eventMetadata : [
            [0] : {
                key : Event Type
                value : BackgroundFetchSuccessEvent
            }
        ]
        eventName : Background Fetch completed
        instanceId : my-fetch-success
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
]
Background Fetch Failure:
[
    [0] : {
        eventMetadata : [
            [0] : {
                key : Start Paused
                value : No
            }
            [1] : {
                key : Total Requests
                value : 1
            }
        ]
        eventName : Background Fetch registered
        instanceId : my-fetch-failure
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [1] : {
        eventMetadata : [
        ]
        eventName : Background Fetch started
        instanceId : my-fetch-failure
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [2] : {
        eventMetadata : [
            [0] : {
                key : Request Index
                value : 0
            }
            [1] : {
                key : URL
                value : http://127.0.0.1:8000/missing/
            }
        ]
        eventName : Request processing started
        instanceId : my-fetch-failure
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [3] : {
        eventMetadata : [
            [0] : {
                key : Request Index
                value : 0
            }
            [1] : {
                key : Response Size (bytes)
                value : 0
            }
            [2] : {
                key : Response Status
                value : 404
            }
            [3] : {
                key : URL
                value : http://127.0.0.1:8000/missing/
            }
        ]
        eventName : Request processing completed
        instanceId : my-fetch-failure
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [4] : {
        eventMetadata : [
            [0] : {
                key : Event Type
                value : BackgroundFetchFailEvent
            }
            [1] : {
                key : Failure Reason
                value : BAD_STATUS
            }
        ]
        eventName : Background Fetch completed
        instanceId : my-fetch-failure
        origin : http://127.0.0.1:8000/
        service : backgroundFetch
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
]
Background Sync Success:
[
    [0] : {
        eventMetadata : [
        ]
        eventName : Registered sync
        instanceId : background-sync-resolve
        origin : http://127.0.0.1:8000/
        service : backgroundSync
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [1] : {
        eventMetadata : [
            [0] : {
                key : Last Chance
                value : No
            }
        ]
        eventName : Dispatched sync event
        instanceId : background-sync-resolve
        origin : http://127.0.0.1:8000/
        service : backgroundSync
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [2] : {
        eventMetadata : [
            [0] : {
                key : Status
                value : succeeded
            }
        ]
        eventName : Sync completed
        instanceId : background-sync-resolve
        origin : http://127.0.0.1:8000/
        service : backgroundSync
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
]
Background Sync Failure:
[
    [0] : {
        eventMetadata : [
        ]
        eventName : Registered sync
        instanceId : background-sync-reject
        origin : http://127.0.0.1:8000/
        service : backgroundSync
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [1] : {
        eventMetadata : [
            [0] : {
                key : Last Chance
                value : No
            }
        ]
        eventName : Dispatched sync event
        instanceId : background-sync-reject
        origin : http://127.0.0.1:8000/
        service : backgroundSync
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
    [2] : {
        eventMetadata : [
            [0] : {
                key : Failure Reason
                value : waitUntil rejected
            }
            [1] : {
                key : Next Attempt Delay (ms)
                value : 300000
            }
        ]
        eventName : sync event failed
        instanceId : background-sync-reject
        origin : http://127.0.0.1:8000/
        service : backgroundSync
        storageKey : http://127.0.0.1:8000/
        timestamp : <number>
    }
]