improved test coverage

Author: andreapasquale94

test/Definitions/planetary.jl

@@ -9,7 +9,10 @@ function Bodies.body_rotational_elements(::Number, ::Val{-1})
 end
 
 frames = FrameSystem{4, Float64}()
+@test_throws Exception add_axes_bci2000!(frames, :BCI, -1, -1)
+@test_throws Exception add_axes_bcrtod!(frames, :BCR, -2, -1)
 add_axes_icrf!(frames)
+
 @test_nowarn add_axes_bci2000!(frames, :BCI, -1, -1)
 
 R = rotation12(frames, :ICRF, :BCI, 12.345)
@@ -27,3 +30,6 @@ R = rotation12(frames, :ICRF, :BCR, 12.345)
 @test R[2] ≈ DCM(0.0I)
 @test R[3] ≈ DCM(0.0I)
 @test R[4] ≈ DCM(0.0I) 
+
+@test_throws Exception add_axes_bci2000!(frames, :BCR, -2, -10)
+@test_throws Exception add_axes_bcrtod!(frames, :BCR, -2, -10)