Started adding tests for missing coverage

Author: theogf

src/generic.jl

@@ -1,10 +1,9 @@
 @inline metric(κ::Kernel) = κ.metric
 
 ## Allows to iterate over kernels
-Base.length(::Kernel) = 1 #TODO Add test
-
-Base.iterate(k::Kernel) = (k,nothing) #TODO Add test
-Base.iterate(k::Kernel, ::Any) = nothing #TODO Add test
+Base.length(::Kernel) = 1
+Base.iterate(k::Kernel) = (k,nothing)
+Base.iterate(k::Kernel, ::Any) = nothing
 
 ### Syntactic sugar for creating matrices and using kernel functions
 for k in [:ExponentialKernel,:SqExponentialKernel,:GammaExponentialKernel,:MaternKernel,:Matern32Kernel,:Matern52Kernel,:LinearKernel,:PolynomialKernel,:ExponentiatedKernel,:ZeroKernel,:WhiteKernel,:ConstantKernel,:RationalQuadraticKernel,:GammaRationalQuadraticKernel]

src/transform/scaletransform.jl

@@ -52,4 +52,4 @@ _transform(t::ScaleTransform{<:AbstractVector{<:Real}},X::AbstractMatrix{<:Real}
 transform(t::ScaleTransform{<:Base.RefValue{<:Real}},x::AbstractVecOrMat,obsdim::Int=defaultobs) = t.s[] .* x
 
 Base.isequal(t::ScaleTransform{T},t2::ScaleTransform{T}) where {T<:Base.RefValue{<:Real}} = isequal(t.s[],t2.s[])
-Base.:==(t::ScaleTransform{T},t2::ScaleTransform{T}) where {T<:AbstractVector{<:Real}} = isequal(t.s,t2.s)
+Base.isequal(t::ScaleTransform{T},t2::ScaleTransform{T}) where {T<:AbstractVector{<:Real}} = isequal(t.s,t2.s)

test/runtests.jl

@@ -10,5 +10,6 @@ include("test_constructors.jl")
 include("test_transform.jl")
 include("test_distances.jl")
 include("test_kernels.jl")
+include("test_generic.jl")
     #include("types.jl")
 end

test/test_generic.jl

@@ -0,0 +1,9 @@
+using KernelFunctions
+
+k = SqExponentialKernel()
+
+@testset "Generic functions to test" begin
+    @test length(k) == 1
+    @test iterate(k) == (k,nothing)
+    @test iterate(k,1) == nothing
+end