[FileFormats.CBF] tidy test/FileFormats/CBF/CBF.jl (#2486)

Author: odow

src/functions.jl

@@ -914,6 +914,11 @@ function Base.isapprox(
     )
 end
 
+# This method is used by CBF in testing.
+function Base.isapprox(f::VectorOfVariables, g::VectorAffineFunction; kwargs...)
+    return isapprox(convert(typeof(g), f), g; kwargs...)
+end
+
 _is_approx(x, y; kwargs...) = isapprox(x, y; kwargs...)
 
 function _is_approx(x::AbstractArray, y::AbstractArray; kwargs...)