Fix issue throwing MethodError on convert_response for brpop and similar functions

Author: vitornesello

src/client.jl

@@ -90,6 +90,14 @@ function convert_response(::Type{Union{T, Nothing}}, response) where {T <: Abstr
     return response
 end
 
+function convert_response(::Type{Union{Array{T, 1}, Nothing}}, response) where {T <: AbstractString}
+    if response == nothing
+        nothing
+    else
+        convert_response(Array{T, 1}, response)
+    end
+end
+
 # redundant
 function convert_response(::Type{Array{Union{T, Nothing}, 1}}, response) where {T<:Number}
     if response == nothing

src/commands.jl

@@ -86,9 +86,9 @@ end
 @redisfunction "hscan" Tuple{Integer, Dict{AbstractString, AbstractString}} key cursor::Integer options...
 
 # List commands
-@redisfunction "blpop" Array{AbstractString, 1} keys timeout
-@redisfunction "brpop" Array{AbstractString, 1} keys timeout
-@redisfunction "brpoplpush" AbstractString source destination timeout
+@redisfunction "blpop" Union{Array{AbstractString, 1}, Nothing} keys timeout
+@redisfunction "brpop" Union{Array{AbstractString, 1}, Nothing} keys timeout
+@redisfunction "brpoplpush" Union{AbstractString, Nothing} source destination timeout
 @redisfunction "lindex" Union{AbstractString, Nothing} key index
 @redisfunction "linsert" Integer key place pivot value
 @redisfunction "llen" Integer key