Nikithauc/typescript beta mainnamespace

[nikithauc]

For beta version, the typescript typings top-level namespace is 'microsoftgraphbeta'. The existing code has main namespaces always set to 'microsoftgraph'. This PR brings in the following changes-

1. For the main namespace to be generated as 'microsoftgraphbeta' when generating beta version, we will be passing "typescript.namespacePostfix:beta" as a property '-p typescript.namespacePostfix:beta'.
2. During the generation of the typescript main namespace, the code will if the property 'typescript.namespacePostfix' exists and if present, will append the value to "microsoftgraph".

[zengin]

style: Please consider splitting this into multiple lines. And if you use null-conditional operator:

Suggested change

	return TypeScriptMainNamespaceNamePrefix + (ConfigurationService.Settings.Properties != null && ConfigurationService.Settings.Properties.ContainsKey("typescript.namespacePostfix") ? ConfigurationService.Settings.Properties["typescript.namespacePostfix"] : string.Empty);
	var properties = ConfigurationService.Settings?.Properties;
	return properties?.ContainsKey("typescript.namespacePostfix") == true
	? TypeScriptMainNamespaceNamePrefix + properties["typescript.namespacePostfix"]
	: TypeScriptMainNamespaceNamePrefix;

[ddyett]

not sure if case sensitivity matters here but for php would languageStr be "PHP" so the string ends up exactly the same. Since it's a passed in parameter i don't know that's guaranteed and if it matters.

[ddyett]

i think this is answered looking at how it's called from the PHPMultipleNamespaces file.

[zengin]

This is fed from an enum that is local to the tests, so nobody will be able to change it by changing a string parameter somewhere. The test caller needs to specify an enum value.

Also this is only used as part of a directory name where case doesn't matter as long as you are on Windows :)