Report for Assignment 1

Project chosen

Name: pysnmp

URL: https://github.com/lextudio/pysnmp

Number of lines of code and the tool used to count it: 24961 (lizard pysnmp)

Programming language: Python

Coverage measurement

Existing tool

coverage.py + pytest-cov was used for coverage

poetry run pytest --cov=pysnmp --cov-report=xml:coverage.xml

Overview

Functions - Ari

Functions - Rares

NetworkAddress.clone(): pysnmp/proto/rfc1155.py

TypeCoercionHackMixIn._verifyComponent(): pysnmp/proto/rfc1155.py

Your own coverage tool

Ari Ionescu

Bits.prettyIn(): pysnmp/proto/rfc1902.py

Bits.prettyOut(): pysnmp/proto/rfc1902.py

Link to commit: 43798f4e

IDs represent lines where the instrumentation was added.

IDs 664 - 675: Bits.prettyIn() IDs 685 - 694: Bits.prettyOut()

Rares David

Link to commit: 9a715db6

IDs represent lines where the instrumentation was added from rfc1155.py.

Coverage improvement

Individual tests

Ari Ionescu

Test 1

Both sets of tests are in commit 293cd1aa.

Before

coverage.py:

Own tool:

After

coverage.py:

Own tool:

Coverage improvement was from 0% to 100% branch coverage for both functions, as the different tests exercies all tested cases.

Rares David

Tests

Both tests are in commit 9a715db6.

Before

After

Coverage improvement is from 0% to 85%. One branch is not reached since we couldn't figure out how to trigger that exact scenario, or if it's even possible.

Overall

Before

After

Overall improvement of 66% -> 73% line coverage.

Statement of individual contributions

Ari Ionescu

Coverage tool 2 functions instrumented + tested

Rares David

Repo fork + project setup 2 functions instrumented + tested