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  • Operating mode
  • Managing assertions
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Stored procedures
Checks whether an expression is Null in assertive programming and in automated test mode.
Remark: This function is equivalent to dbgCheckNull.
Example
// Si ChercheClient est une procédure qui cherche un client par son nom et qui renvoie
// l'objet CClient correspondant au client si le client est connu et Null sinon
// Il ne faudrait pas ajouter un client qui existe déjà
TestCheckNull(ChercheClient(NomClient), "Le client '%1' est déjà connu", NomClient)
// Ajoute le client
AjouteClient(NomClient)
Syntax
TestCheckNull(<Expression> [, <Comments> [, <Parameter 1> [... [, <Parameter N>]]]])
<Expression>: Character string
Expression that must be checked.
<Comments>: Character string
Character string in the format defined by StringBuild.
<Parameter 1>: Any type
First parameter expected by <Comments>.
<Parameter N>: Any type
Nth parameter expected by <Comments>.
Remarks

Operating mode

When the expression is not Null:
  • WINDEVWEBDEV - Server code in test mode automatic, an error is added to the test report (equivalent to the TestWriteResult function).
  • in manual test mode, an assertion is displayed (equivalent to dbgAssert).
  • in runtime mode, an assertion is displayed if the assertions have been enabled (equivalent to dbgAssert).
When running an application, the expression is not evaluated if the assertions are not enabled.
dbgOnError allows you to automatically start a WLanguage procedure used to retrieve the comment linked to the error.
AndroidAndroid Widget

Managing assertions

The messages of TestCheckNull will be written into the ADB log (at "Assert" level). For more details, see Managing ADB logs.
Component: wd270vm.dll
See also
Minimum version required
  • Version 23
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