Add assembleStorage and disassembleStorage tests for CSR

[KyleVaughn]

Description:

To allow conversion between the CSR format and other SpMV formats (and vice versa), we require assembleStorage and disassembleStorage methods. This issue will develop tests to ensure these CSR methods are functioning correctly.

Tasks:

• [ ] Ensure the assembleStorage and disassembleStorage methods for CSR have been written
• [ ] Have multiple datasets in original (COO) format
• [ ] Use CSR assembleStorage method
• [ ] Get row location i by iterating through row pointers
• [ ] For each i, get column location j by iterating through column ID array
• [ ] For each i, get value val by iterating through value array
• [ ] Compare extracted (i,j) and val to original (COO) format. If all values match, print pass otherwise fail
• [ ] Once CSR assembleStorage method passes, use CSR disassembleStorage method
• [ ] Compare new (COO) format to original (COO) format. If all values match, print pass otherwise fail

Definition of done:

This issue is considered done when the CSR assembleStorage and disassembleStorage tests all pass.

[KyleVaughn]

Review by @lwh1106

[lwh1106]

Recommend to refer to the interface or data structure of SparseMatrix and implement some of them in CSR, especially for the assembleStorage() function.

[lwh1106]

The description and tasks look great! I would have a question about one of the tasks. By saying the dataset in COO format, do we need to create all these examples by ourselves? Or are there other ways? We can demonstrate a bit of these here. Overall, it is good. You may also need to refer to your front end and back end when developing and finishing your tasks.

[lwh1106]

Hi @AnvayPradhan I can see the test for the accessor, matvec, and view methods. It seems that the test for assembleStorage and disassembleStorage is still not pushed, right? Just let me know once you finish this so that I can review your work, thanks!