robot-simulator: ensure mutating functions return robot (JuliaLang#259)

Closes JuliaLang#224.
cmcaine · Sep 28, 2020 · 6adc8ef · 6adc8ef
1 parent d86b8b8
commit 6adc8ef
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diff --git a/exercises/robot-simulator/robot-simulator.ipynb b/exercises/robot-simulator/robot-simulator.ipynb
diff --git a/exercises/robot-simulator/runtests.jl b/exercises/robot-simulator/runtests.jl
@@ -12,6 +12,14 @@ include("robot-simulator.jl")
     @test heading(r) == SOUTH
 end
 
+@testset "mutating functions should return robot" begin
+    r = Robot((0, 0), NORTH)
+    @test r == turn_right!(r)
+    @test r == turn_left!(r)
+    @test r == advance!(r)
+    @test r == move!(r, "A")
+end
+
 @testset "rotate +π/2" begin
     r = Robot((0, 0), NORTH)
     turn_right!(r)