don't test cont. time

lib/ControlSystemsBase/test/test_discrete.jl

@@ -184,26 +184,26 @@ Qd3, Rd3 = c2d(sysd, Qc, Rc; opt=:c) # Discrete system as input
 
 
 # NOTE: these tests are not run due to OrdinaryDiffEq latency, they should pass
-using OrdinaryDiffEq
-L = lqr(sysc, Qc, Rc)
-dynamics = function (xc, p, t)
-    x = xc[1:sysc.nx]
-    u = -L*x
-    dx = sysc.A*x + sysc.B*u
-    dc = dot(x, Qc, x) + dot(u, Rc, u)
-    return [dx; dc]
-end
-prob = ODEProblem(dynamics, [x0; 0], (0.0, 10.0))
-sol = solve(prob, Tsit5(), reltol=1e-8, abstol=1e-8)
-cc = sol.u[end][end]
-Ld = lqr(sysd, Qd, Rd)
-sold = lsim(sysd, (x, t) -> -Ld*x, 0:Ts:10, x0 = x0)
-function cost(x, u, Q, R)
-    dot(x, Q, x) + dot(u, R, u)
-end
-cd = cost(sold.x, sold.u, Qd, Rd)
-@test cc ≈ cd rtol=0.01
-@test abs(cc-cd) < 1.0001*0.005531389319983315
+# using OrdinaryDiffEq
+# L = lqr(sysc, Qc, Rc)
+# dynamics = function (xc, p, t)
+#     x = xc[1:sysc.nx]
+#     u = -L*x
+#     dx = sysc.A*x + sysc.B*u
+#     dc = dot(x, Qc, x) + dot(u, Rc, u)
+#     return [dx; dc]
+# end
+# prob = ODEProblem(dynamics, [x0; 0], (0.0, 10.0))
+# sol = solve(prob, Tsit5(), reltol=1e-8, abstol=1e-8)
+# cc = sol.u[end][end]
+# Ld = lqr(sysd, Qd, Rd)
+# sold = lsim(sysd, (x, t) -> -Ld*x, 0:Ts:10, x0 = x0)
+# function cost(x, u, Q, R)
+#     dot(x, Q, x) + dot(u, R, u)
+# end
+# cd = cost(sold.x, sold.u, Qd, Rd)
+# @test cc ≈ cd rtol=0.01
+# @test abs(cc-cd) < 1.0001*0.005531389319983315
 
 
 # test case from paper