test: change A matrix

Author: jcarpent

unittest/python/test_MINRES.py

@@ -4,13 +4,11 @@
 import numpy.linalg as la
 
 dim = 100
-A = np.random.rand(dim,dim)
-
-A = (A + A.T)*0.5 + np.diag(10. + np.random.rand(dim))
+A = np.eye(dim)
 
 minres = eigenpy.MINRES(A)
 
 X = np.random.rand(dim,20)
 B = A.dot(X)
 X_est = minres.solve(B)
-assert eigenpy.is_approx(A.dot(X_est),B)
+assert eigenpy.is_approx(A.dot(X_est),B,1e-6)