AssertRelEqual

The AssertRelEqual method uses the IsRelEqual method to check whether two floating-point values (the result of the preparation step and the expected value) fall within a defined relative or absolute tolerance. If this is not the case, the test case fails and returns the specified error message.

Syntax

METHOD PROTECTED AssertRelEqual
VAR_INPUT
    actual         : LREAL;
    expected     : LREAL;
    precision     : LREAL;
    message        : STRING(255) := ''; // optional assert message
END_VAR

Inputs

Name	Type	Description
actual	LREAL	Value determined by executing the test case.
expected	LREAL	Expected value for the test case
precision	LREAL	Relative tolerance for comparison
message	STRING(255)	Error message if the test fails.

Example


AssertRelEqual(actual:= result, expected:= expectedValue, precision, message:= ‘Error message to be displayed in the client!')