Add a unit test for the mixing schemes

Nicolas Tancogne-Dejeanrequested to merge
unit_test_mixing into main

Description

Add a unit test for the mixing schemes

The method is tested in 1D for finding the fixed-point solution of a simple trigonometric function.

Tests on this function give the following results:

  • Broyden: 12 iterations
  • Linear: 54 iterations
  • diis: 14 iterations

Checklist

  • I have checked that my code follows the Octopus coding standards
  • I have added tests for all the new features added in this request.
Edited by Nicolas Tancogne-Dejean

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