Verify the Apex Test Classes running or Execute Apex Tests

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Apex unit tests ensure good quality for your Apex code and let you meet requirements for deploying Apex.

Some of the benefits of Apex unit tests are:

  • To ensure that your Apex classes and triggers work as expected
  • Having a suite of regression tests that can be rerun every time classes and triggers are updated to ensure that future updates you make to your app don’t break existing functionality
  • Meeting the code coverage requirements for deploying Apex to production or distributing Apex to customers via packages
  • High-quality apps delivered to the production org, which makes production users more productive
  • High-quality apps delivered to package subscribers, which increase your customers trust

You have just select the Apex tests you want to run, then examine the results, analyze error messages, and inspect your source Apex code.

Example:

Class:

public class TemperatureConverter {

    // Takes a Fahrenheit temperature and returns the Celsius equivalent.

    public static Decimal FahrenheitToCelsius(Decimal fh) {

        Decimal cs = (fh - 32) * 5/9;

        return cs.setScale(2);

    }

}


Test Class:

@isTest

private class TemperatureConverterTest {

    @isTest static void testWarmTemp() {

        Decimal celsius = TemperatureConverter.FahrenheitToCelsius(70);

        System.assertEquals(21.11,celsius);

    }

    @isTest static void testFreezingPoint() {

        Decimal celsius = TemperatureConverter.FahrenheitToCelsius(32);

        System.assertEquals(0,celsius);

    }

    @isTest static void testBoilingPoint() {

        Decimal celsius = TemperatureConverter.FahrenheitToCelsius(212);        

        System.assertEquals(100,celsius,'Boiling point temperature is not expected.');

    } 

    @isTest static void testNegativeTemp() {

        Decimal celsius = TemperatureConverter.FahrenheitToCelsius(-10);

        System.assertEquals(-23.33,celsius);

    }

}


To view what's running now:

Setup | start typing Apex Test Execution in the Quick Find box | select Apex Test Execution


Steps to Execute Apex Tests:

Setup | start typing Apex Test Execution in the Quick Find box | select Apex Test Execution | Click Select Tests | Select the tests to run. (The list of tests includes only classes that contain test methods)(| To opt out of collecting code coverage information during test runs, select Skip Code Coverage) | Click Run.

You may open the Apex Class to check the coverage or from developer console.


Steps to run from Developer Console:

In developer console, Test | New Run | Select the Test Class | Run

Double click on the class name (as in attached visual) to see the coverage which is 100% here.


Visual: https://www.youtube.com/watch?v=A5ASrL_PZ_o


Reference:

https://help.salesforce.com/s/articleView?id=sf.code_test_execution.htm&type=5

https://trailhead.salesforce.com/content/learn/modules/apex_testing


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