fix MutationWrapper (view -> viewer), add test

Author: alyst

src/genetic_operators/crossover/mutation_wrapper.jl

@@ -11,7 +11,7 @@ end
 
 function apply!(wrapper::MutationWrapper, target::Individual, targetIndex::Int, pop, parentIndices)
     @assert length(parentIndices) == 1
-    apply!(wrapper.inner, copy!(target, view(pop, parentIndices[1])), targetIndex)
+    apply!(wrapper.inner, copy!(target, viewer(pop, parentIndices[1])), targetIndex)
 end
 
 Base.show(io::IO, xover::MutationWrapper) = print(io, "MutationWrapper(", xover.inner, ")")

test/test_crossover_operators.jl

@@ -62,4 +62,15 @@ context("DiffEvoRandBin1") do
   end
 end
 
+context("MutationWrapper") do
+    ss = symmetric_search_space(2, (0.0, 10.0))
+    pop = reshape(collect(1.0:8.0), 2, 4)
+    gibbs = UniformMutation(ss)
+    gibbs_wrapper = BlackBoxOptim.MutationWrapper(gibbs)
+    @fact numchildren(gibbs_wrapper) --> 1
+    @fact numparents(gibbs_wrapper) --> 1
+    mut_res = BlackBoxOptim.apply!(gibbs_wrapper, [0.0, 0.0], 1, pop, [2])
+    @fact sum(mut_res .== BlackBoxOptim.viewer(pop, 2)) --> 0
+end
+
 end