Complete a JUnit 4 test using the provided NumberSequence file -- 2

Prepare a JUnit 4 test within Eclipse, named TestNumberSequence, for the NumberSequence ADT. Prepare TestNumberSequence with the [login to view URL] package, and write tests against the function implementations within NumberSequence. Note: this will need to be completed within 24 hours. Looking at [login to view URL]() method: /** * Retrieve the first number in the sequence. * * @return first number as an `int` */ public int first() { // Not yet implemented. // This is an exercise in writing tests, not implementation. return 0; // this is a placeholder so that the code compiles. } This function retrieves the first number in the sequence. How is it stored? This is just an implementation question. The only concern is whether this function returns the expected first number as an int. The implementation details are not relevant to writing the test. Next, looking at [login to view URL]() method: /** * List all all numbers generated thus far, in order. * <p> * <b>Any formatting is acceptable.</b> */ @Override public String toString() { // Not yet implemented. // This is an exercise in writing tests, not implementation. return "This is a placeholder so that the code compiles."; } It states that any formatting is accepted, so the test does not need to assume specific formatting for toString. Nothing within the provided NumberSequence file needs to be edited. I will only need the [login to view URL] file that is created upon completion. I have provided a sample of test placeholders, but they are not complete. Overview: 1 - File returned ([login to view URL]) is placed within the [login to view URL] package. 2 - Using a completed correct implementation of NumberSequence, every single one of the tests pass. 3 - One test per mutator, the piece of code performs operations as designed and does not something it was not designed for. I will be running this through Eclipse Java, so it needs to run through that. However, feel free to use whichever methods you prefer as long as the outcome is the same.