Introduce regression test for kinetic energy distribution check

[ptmerz]

Description

This introduces a regression test which checks that the output (return value, printed output, plot) does not differ between code versions.

Refs #59

Status

• [x] Ready to go

[codecov[bot]]

Codecov Report

Merging #112 (f7d391a) into master (eb65cd0) will increase coverage by 3.72%. The diff coverage is n/a.