Add COO view tests

[KyleVaughn]

Description:

This test will check the successful implementation of a COO view method from the class. It will also determine the correctness of the outputs from the method.

Tasks:

• [ ] Check that the COO view method is implemented.
• [ ] Understand the I/O of the method and be able to call the function correctly.
• [ ] Prepare some reference outputs with corresponding inputs.
• [ ] Initialize matrices with desired sizes and collects the output matrix value from the COO view method.
• [ ] Compare the reference values and COO view method output values (from specified inputs) by computing the error in L2 norm.
• [ ] Print an error message if the error exceeds the tolerance and illustrates the reason why the test fails (size inconsistency, value missing, etc.).

Definition of done:

The test will give desired outputs (pass or fail) with messages based on the test provided.

[KyleVaughn]

Review by @AshrayMohit

[AshrayMohit]

Sound implementation, could use a couple of more tests,

• [ ] Check if the view method works itself
• [ ] Provide a error message stating why the view method returned a false value

These would make it an easier debugging implementation