[BUG] Create a Service Bus Subscription with a default Rule

[brunomace]

Describe the bug
When creating a new Subscription with a first Rule, the Rule isn't taken into account a the default Rule is created.
The method called is ServiceBusAdministrationClient. createSubscription(String topicName, String subscriptionName, String ruleName, CreateSubscriptionOptions subscriptionOptions, CreateRuleOptions ruleOptions).
It works if I create a new Subscription, then create the Rule, then delete the default Rule. But the Subscription can collect other messages (see this issue: #29885).
The HTTP payload seems correct, it contains all the rule informations. So the problem is maybe on the server side.

Exception or Stack Trace
No error or exception is raised.

To Reproduce
Execute the code snippet.

Code Snippet

ServiceBusAdministrationClient asbClient = getClientViaConnectionString();
String topicName = "distribution.commun";
String subscriptionName = "test-" + System.currentTimeMillis();
CreateSubscriptionOptions subOpts = new CreateSubscriptionOptions();
String defaultRuleName = "document-recu";
CorrelationRuleFilter ruleFilter = new CorrelationRuleFilter();
ruleFilter.setLabel("1.1.evenement.document.recu");
CreateRuleOptions defaultRuleOpts = new CreateRuleOptions() //
		.setFilter(ruleFilter) //
		.setAction(new EmptyRuleAction());
// Create the Subscription with a default Rule
asbClient.createSubscription(topicName, subscriptionName, defaultRuleName, subOpts, defaultRuleOpts);
// Check
Collection<RuleProperties> rules = asbClient.listRules(topicName, subscriptionName).stream().toList();
if (rules.size() != 1) {
	System.err.println("" + rules);
	System.exit(1);
}
RuleProperties rule = rules.iterator().next();
if (!rule.getName().equals(defaultRuleName)) {
	// Will fail here
	System.err.println("" + rule.getName());
	System.exit(1);
}

Expected behavior
The default Rule isn't created, the specified Rule is created.

Setup:

• Library/Libraries: com.azure:azure-messaging-servicebus:7.14.6 (the latest version available)
• Java version: 17

Information Checklist
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• Bug Description Added
• Repro Steps Added
• Setup information Added

[brunomace]

Apparently there is no unit test for this method.

[anuchandy]

Root cause: The generated model used the name "RuleDescription" to serialize the rule instead of "DefaultRuleDescription". This requires some analysis in the code generator.