Evaluate logical expression
assert( evaluates a logical
expression)expression. Logical expressions evaluate to true
or false. If the assert statement evaluates to
false, simulation stops and returns an error.
assert(
returns the specified error message string (expression,errmsg)errmsg) for the failed
assert statement. If you run the test in the Test Manager, the error
message appears in the simulation log. If you run the test outside the Test Manager, the
message appears in the Diagnostic Viewer.
assert statements can be used in the Test Sequence and Test
Assessment blocks and in Stateflow® charts. assert in Model Reference blocks works in Normal
mode, but not in Rapid Accelerator mode simulations.
When comparing floating-point data in assert statements, consider
the precision limitations associated with floating-point numbers. If you need to use
floating-point data, define a tolerance for the assessment. See Floating-Point Numbers.
For example, instead of assert(x == 5), assert x
within a tolerance of 0.001:
assert(abs(x-5) < 0.001)