Added direct form IIR tests and updated file for 100% coverage

Added tests for direct form IIR 1 and 2, made small changes to the generators, added multi-tone test for fft and removed unused code for 100 percent test coverage.

Closes: #275 (closed)

added SFG generators Testing labels

requested review from @oscgu95

assigned to @simbj106

changed the description

enabled an automatic merge when all merge checks for 3c28f2eb pass

I added scipy as a test dependency to compare against their iir filter. What do you think about it? @oscgu95

aborted the automatic merge because target branch was updated

approved this merge request

added 2 commits

• 047b6e91 - 1 commit from branch master
• f0c1bba8 - added tests for direct form IIR 1 and 2, made small changes to the generators,...

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enabled an automatic merge when all merge checks for f0c1bba8 pass

aborted the automatic merge because target branch was updated

added 2 commits

• 3c28f2eb - added tests for direct form IIR 1 and 2, made small changes to the generators,...
• ae9402aa - Merge branch 'add-direct-form-iir-tests' of gitlab.liu.se:da/B-ASIC into add-direct-form-iir-tests

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added 1 commit

• c8ae8b7a - fixes from merge with master

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reset approvals from @oscgu95 by pushing to the branch

added 3 commits

• 27020564 - 1 commit from branch master
• 876649c8 - added tests for direct form IIR 1 and 2, made small changes to the generators,...
• a5eacf88 - fixes from merge with master

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@oscgu95 Did small change to make pipeline past post rebase. New approve needed.

enabled an automatic merge when all merge checks for a5eacf88 pass

approved this merge request

merged