approx couple of tests

Author: shashi

test/sdesystem.jl

@@ -174,13 +174,13 @@ fdif!(du,u0,p,t)
 sys2 = stochastic_integral_transform(sys,1//2)
 fdrift = eval(generate_function(sys2)[1])
 fdif = eval(generate_diffusion_function(sys2)[1])
-@test fdrift(u0,p,t) ==  @. sin(t) + cos(u0) + 1//2*1/(1 + u0^2)*(pi + atan(u0))
+@test fdrift(u0,p,t) ≈  @. sin(t) + cos(u0) + 1//2*1/(1 + u0^2)*(pi + atan(u0))
 @test fdif(u0,p,t) == pi .+ atan.(u0)
 fdrift! = eval(generate_function(sys2)[2])
 fdif! = eval(generate_diffusion_function(sys2)[2])
 du = similar(u0)
 fdrift!(du,u0,p,t)
-@test  du ==  @. sin(t) + cos(u0) + 1//2*1/(1 + u0^2)*(pi + atan(u0))
+@test  du ≈  @. sin(t) + cos(u0) + 1//2*1/(1 + u0^2)*(pi + atan(u0))
 fdif!(du,u0,p,t)
 @test du == pi .+ atan.(u0)