wrote a test to ensure the service works and deserializes 11 employees

Signed-off-by: Matt Bruce <mbrucedogs@gmail.com>

EmployeeDirectoryTests/EmployeeDirectoryTests.swift

@@ -10,8 +10,13 @@ import Testing
 
 struct EmployeeDirectoryTests {
 
-    @Test func example() async throws {
+    @Test func getEmployeesValid() async throws {
-        // Write your test here and use APIs like `#expect(...)` to check expected conditions.
+        let employees = try await EmployeeService().getEmployees()
+        #expect(employees.count == 11)
+    }
+    
+    @Test func getEmployeesInValid() async throws {
+        let employees = try await EmployeeService().getEmployees()
+        #expect(employees.count == 11)
     }
-
 }