$ASSERTS: Difference between revisions
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* This metacommand does not require a comment [[Apostrophe|']] or [[REM]] before it. There is no space between the metacommand name, the colon and the CONSOLE parameter. | * This metacommand does not require a comment ''[[Apostrophe|']]'' or [[REM]] before it. There is no space between the metacommand name, the colon and the CONSOLE parameter. | ||
* If this metacommand is used in a program and any of the set [[_ASSERT]] checkpoints will fail, then the program will stop with an '''{{Text|_ASSERT failed|red}}''' error. | * If this metacommand is used in a program and any of the set [[_ASSERT]] checkpoints will fail, then the program will stop with an '''{{Text|_ASSERT failed|red}}''' error. | ||
* Detailed error messages passed to the [[_ASSERT]] statement will be displayed in the console window, but only if '''$ASSERTS:CONSOLE''' is used. | * Detailed error messages passed to the [[_ASSERT]] statement will be displayed in the console window, but only if '''$ASSERTS:CONSOLE''' is used. | ||
Revision as of 07:08, 11 July 2022
The $ASSERTS metacommand enables debug tests with the _ASSERT macro.
Syntax
- $ASSERTS
- $ASSERTS:CONSOLE
Description
- This metacommand does not require a comment ' or REM before it. There is no space between the metacommand name, the colon and the CONSOLE parameter.
- If this metacommand is used in a program and any of the set _ASSERT checkpoints will fail, then the program will stop with an _ASSERT failed error.
- Detailed error messages passed to the _ASSERT statement will be displayed in the console window, but only if $ASSERTS:CONSOLE is used.
- Note
- This metacommand is the main switch to enable debug tests during development. Later just remove this metacommand to compile the program without debugging code, all the _ASSERT statements may remain in the code for later debugging sessions, they are simply ignored without this metacommand.
Availability
- QB64 v1.4 and up (QB64 Team)
- QB64-PE v0.5 and up (QB64 Phoenix Edition)
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