Test Case Method Identifier
getNodeSet
Test Items
The purpose of the test is to check that the set of nodes that is retrieved by getNodeSet() is immutable, as claimed in the method specification.
Input Specification
To test the getNodeSet method, we created a SingleGraph (in the setup() method) and modified its nodeSet (removing/adding an element to the set).
Output Specification
Assert that the test case raises an UnsupportedOperationException.