No type completions after case keyword in switch expressions/statements with type pattern matching

[gayanper]

Given the source code

Number n;

switch(n) {
   case 
}

No type completions are provided after case

[gayanper]

@stephan-herrmann test case we can use

	public void testGH2260() throws JavaModelException {
		this.workingCopies = new ICompilationUnit[1];
		this.workingCopies[0] = getWorkingCopy("/Completion/src/SwitchTypePattern.java", """
				public class SwitchTypePattern  {
					public foo(Number n) {
						switch(n) {
							case I
						}
					}
				}\
				""");
		CompletionTestsRequestor2 requestor = new CompletionTestsRequestor2(true);
		requestor.allowAllRequiredProposals();
		String str = this.workingCopies[0].getSource();
		String completeBehind = "case I";
		int cursorLocation = str.lastIndexOf(completeBehind) + completeBehind.length();
		this.workingCopies[0].codeComplete(cursorLocation, requestor, this.wcOwner);
		assertResults("""
				Integer[TYPE]{Integer, null, null, Ljava.lang.Integer, null, 49}\
					""", requestor.getResults());
	}	

[stephan-herrmann]

I prefer to first get an overview of the big picture before resolving individual test cases, because otherwise we will have to refactor the same code region over and over again. But surely we can use this test case as one example in #1531 :)