Tests the DOM.forceShowInterest method
1. Initial state:
State: {
    type : object
    value : {
        buttonInterestSource : false
        popoverOpen : false
        targetInterestTarget : false
    }
}

2. Call DOM.forceShowInterest(enable: true):
State after forceShowInterest(true): {
    type : object
    value : {
        buttonInterestSource : true
        popoverOpen : true
        targetInterestTarget : true
    }
}

3. Call DOM.forceShowInterest(enable: false):
State after forceShowInterest(false): {
    type : object
    value : {
        buttonInterestSource : false
        popoverOpen : false
        targetInterestTarget : false
    }
}