CompileAndTestRequest

The compileAndTest() call contains this object, a request with information about the Apex to be compiled.

A CompileAndTestRequest object has the following properties:

Name	Type	Description
checkOnly	boolean	If set to `true`, the Apex classes and triggers submitted are not saved to your organization, whether or not the code successfully compiles and unit tests pass.
classes	string	Content of the class or classes to be compiled.
deleteClasses	string	Name of the class or classes to be deleted.
deleteTriggers	string	Name of the trigger or triggers to be deleted.
runTestsRequest	RunTestsRequest	Specifies information about the Apex to be tested. If this request is sent in a production organization, this property is ignored and all unit tests are run for your entire organization.
triggers	string	Content of the trigger or triggers to be compiled.

Note the following about this object:

This object contains the RunTestsRequest property. If the request is run in a production organization, the property is ignored and all tests are run.
If any errors occur during compile, delete, testing, or if the goal of 75% code coverage is missed, no classes or triggers are saved to your organization. This is the same requirement as Force.com AppExchange package testing.
All triggers must have code coverage. If a trigger has no code coverage, no classes or triggers are saved to your organization.