Add testset for get_startup()

Author: ufechner7

test/test_utils.jl

@@ -32,4 +32,11 @@ end
     x = -22
     @limit x 10
     @test x == -22
+end
+
+@testset "get_startup" begin
+    wcs = WCSettings(dt=0.02)
+    startup_signal = get_startup(wcs, 1000)
+    @test length(startup_signal) == 1000
+    @test all(startup_signal[14:end] .== 1.0)
 end