LD How value comparison works

Value Comparison

This document specifies the rules to follow when comparing values returned by the System Under Test and the values expected by the field expert.

Comparing character strings

Rule 1 : String comparison is case sensitive

Comparing numbers

 Rule 2 : When comparing numeric values, leading zeros are ignored. When comparing decimal values, trailing zeros are ignored.

Comparing boolean values

 Rule 3 : true and yes both represent the true value. no and false both represent the false value.  Comparison is case insensitive.

Comparing to a null value 

Rule 4 : We can specify that we expect a nil value using the keywords null and nothing.

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Comparing to a type

Rule 5 : We can compare to a specific type (i.e. an instance of a class, an interface or a subclass of a class) using the name of the type.

Comparing to errors 

Rule 6 : We can use the keyword error when we expect an exception to occur within the system.