add test to VECTOR_TO_NUMBER_FUNCS

Author: jrevels

src/DiffTests.jl

@@ -68,6 +68,7 @@ vec2num_3(x) = vecnorm(x' .* x)
 vec2num_4(x) = ((sum(x) + prod(x)); 1)
 vec2num_5(x) = sum((-x).^3)
 vec2num_6(x) = sum([ifelse(i > 0, i, 0) for i in x])
+vec2num_7(x) = sum(map(y -> x[1] * y, x))
 
 function rosenbrock_1(x)
     a = one(eltype(x))
@@ -110,8 +111,9 @@ end
 self_weighted_logit(x) = inv(1.0 + exp(-dot(x, x)))
 
 const VECTOR_TO_NUMBER_FUNCS = (vec2num_1, vec2num_2,  vec2num_3, vec2num_4, vec2num_5,
-                                vec2num_6, rosenbrock_1, rosenbrock_2, rosenbrock_3,
-                                rosenbrock_4, ackley, self_weighted_logit, first)
+                                vec2num_6, vec2num_7, rosenbrock_1, rosenbrock_2,
+                                rosenbrock_3, rosenbrock_4, ackley, self_weighted_logit,
+                                first)
 
 ########################
 # f(x::Matrix)::Number #