ASSERT: Difference between revisions
Jump to navigation
Jump to search
Navigation:
Main Page with Articles and Tutorials
Keyword Reference - Alphabetical
Keyword Reference - By usage
Report a broken link
m (Protected "ASSERT" ([Edit=Allow only autoconfirmed users] (indefinite) [Move=Allow only autoconfirmed users] (indefinite))) |
m (Removed protection from "ASSERT") |
(No difference)
| |
Revision as of 15:55, 1 June 2022
The _ASSERT statement can be used to perform tests in code that's in development, for debugging purposes.
Syntax
- _ASSERT condition[, errorMessage$]
Description
- condition is the condition that must be met in order to consider the _ASSERT valid.
- Optional errorMessage$ is the message to be displayed in the console window if $ASSERTS:CONSOLE is used.
- If the condition is not met (that is, if it evaluates to 0), an error occurs ("_ASSERT failed on line #") and program execution stops.
Availability
- Version 1.4 and up.
Examples
Example: Adding test checks for parameter inputs in a function.
$ASSERTS:CONSOLE DO a = INT(RND * 10) b$ = myFunc$(a) PRINT a, , b$ _LIMIT 3 LOOP UNTIL _KEYHIT FUNCTION myFunc$ (value AS SINGLE) _ASSERT value > 0, "Value cannot be zero" _ASSERT value <= 10, "Value cannot exceed 10" IF value > 1 THEN plural$ = "s" myFunc$ = STRING$(value, "*") + STR$(value) + " star" + plural$ + " :-)" END FUNCTION |
See also