Step execution scripts
Summarize
Summary of Step Execution Scripts
Step execution scripts in ServiceNow's Automated Test Framework (ATF) define the behavior of a test step during execution. They access input and output variables and determine the success or failure of a step based on specified conditions.
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Key Features
- Step Inputs: Access input variables from the inputs related list using the expression
inputs.variableName. - Step Outputs: Define output variables from the outputs related list with the expression
outputs.variableName. - Step Result Management: Use
stepResultto control the outcome of the step. Methods include:setSuccess()to mark the step as successful.setFailed()to mark the step as failed.setOutputMessage(message)to log a message associated with the step result.
Key Outcomes
By effectively utilizing step execution scripts, ServiceNow customers can:
- Automate test steps with precise control over input and output variables.
- Log meaningful messages for both successful and failed steps, aiding in debugging.
- Incorporate asynchronous logic handling, enhancing the robustness of test scenarios.
These capabilities lead to more reliable testing processes, enabling faster application deployment and improved quality assurance.
In a step configuration record, the step execution script field determines what a step with this configuration does when it runs.
Step inputs
The input variables to a step are determined by the inputs related list in the step
configuration record. The inputs parameter to
executeScript() gives the script access to these variables. For example, if
the inputs related list contains two records, var1 and
var2, the script can reference var1 with the expression
inputs.var1 and can reference var2 with
inputs.var2.
Step outputs
The output variables to a step are determined by the outputs related list in the step
configuration record. The outputs parameter to
executeScript() gives the script access to these variables. For example, if
the outputs related list contains two records, out1 and
out2, the script can reference out1 with the expression
outputs.out1 and can reference out2 with
outputs.out2.
Step result
The stepResult parameter provides access to an API that controls whether the step passes or fails. It also determines the message the step writes to the log.
The method stepResult.setSuccess() causes the step to succeed. The method
stepResult.setFailed() causes the step to fail.
The method stepResult.setOutputMessage() sets the message to write to the log
when the step succeeds or fails. It takes one parameter: the string to write to the log. If the
script calls stepResult.setOutputMessage() more than once, the most recent
value set overwrites any previous value.
Record Query step execution script
(function executeStep(inputs, outputs, stepResult) {
if (gs.nil(inputs.table)) {
stepResult.setOutputMessage(gs.getMessage("The '{0}' input variable was not specified",
'table'));
stepResult.setFailed();
return;
}
var query = new GlideRecord(inputs.table);
query.addEncodedQuery(inputs.field_values);
query.query();
if (!query.next()) {
stepResult.setOutputMessage(gs.getMessage("No records matching query:\n{0}",
inputs.field_values));
stepResult.setFailed();
} else {
stepResult.setSuccess();
outputs.table = inputs.table;
outputs.first_record = query.getUniqueValue();
stepResult.setOutputMessage(gs.getMessage("Found {0} {1} records matching query:\n{2}",
[query.getRowCount(),
inputs.table,
inputs.field_values]));
}
}(inputs, outputs, stepResult));
Custom scripted step configs
((function executeStep(inputs, outputs, stepResult, timeout) {
// Waits up to the timeout for some asynchronous logic to finish
// This script checks for completion once a second for up to 60 seconds
var counter = 1;
// Try for up to 60 seconds
while (counter <= timeout) {
// If the asynchronous logic is finished, return "true" to pass the step
// isMyAsyncLogicFinished() can be replaced with any asynchronous event that needs to be tested
if (isMyAsyncLogicFinished()) {
stepResult.setOutputMessage("Success!");
stepResult.setSuccess();
return;
}
// Wait one second, and log the total number of seconds waited
gs.info("Waited " + counter + " seconds for asynchronous logic to finish");
sn_atf.AutomatedTestingFramework.waitOneSecond();
counter++;
}
// If this point is reached, the retry loop ran out of tries; return false to fail the step
stepResult.setOutputMessage("FAILURE: Timed out after waiting for " + timeout + " seconds");
stepResult.setFailed();
}(inputs, outputs, stepResult, timeout));
stepResult.setSuccess()” and stepResult.setFailed() with
return true and return false.