Test Class for Business Hours Check

Question

I am trying to build a test class for my new trigger and part of the trigger is to check current time against the org business hours then set it as a boolean yes/no.

Code:

DateTime now =system.Now();
BusinessHours bh = [SELECT Id FROM BusinessHours WHERE IsDefault=true];
Boolean isWithin= BusinessHours.isWithin(bh.id, now);

How would I write this as a test class to test if it is or is not within the org business hours?

Answer 1

This is a case where you will need to modify the code under test to test it. You will need a class if your trigger logic isn't already in a class:

public class Triggers {

    @TestVisible
    private static DateTime nowOverride;

    public static DateTime now() {
        return nowOverride == null ? System.now() : nowOverride;

    }
}

then your trigger gets its "now" from that class:

DateTime now = Triggers.now();
BusinessHours bh = ...;
...

then in your various test cases you can inject your own "now":

@IsTest
static void insideBusinessHours() {

    Triggers.nowOverride = DateTime.newInstance 2019, 9, 20, 10, 0, 0);

    // Get trigger to run
    // Asset results
}