Writes an error to the log if expression doesn't evaluate to true.
Mojo.require and Mojo.assert methods are very similar. The difference is that Mojo.require methods will throw an exception when their requirements aren't met, and are intended to be used in cases where the application cannot reasonably continue if the requirements aren't met.
Returns String containing the error message written to the log.
| Parameter | Type | Description |
|---|---|---|
| expression | Expression | Expression that must evaluate to true. |
| message | String | Custom message to use if the assertion fails. Message will be run through template evaluation against messageProperties so you can include details of the assertion failure in the message. |
| messageProperties | Object | Object containing values to use with template evaluation. |
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