Flux.jl/test/layers/conv.jl

using Flux, Test
using Flux: maxpool, meanpool

@testset "Pooling" begin
  x = randn(Float32, 10, 10, 3, 2)
  mp = MaxPool((2, 2))
  @test mp(x) == maxpool(x, (2,2))
  mp = MeanPool((2, 2))
  @test mp(x) == meanpool(x, (2,2))
end

@testset "CNN" begin
  r = zeros(Float32, 28, 28, 1, 5)
  m = Chain(
    Conv((2, 2), 1=>16, relu),
    MaxPool((2,2)),
    Conv((2, 2), 16=>8, relu),
    MaxPool((2,2)),
    x -> reshape(x, :, size(x, 4)),
    Dense(288, 10), softmax)

  @test size(m(r)) == (10, 5)
end

@testset "Depthwise Conv" begin
  r = zeros(Float32, 28, 28, 3, 5)

  m1 = DepthwiseConv((2, 2), 3=>5)

  @test size(m1(r), 3) == 15

  m2 = DepthwiseConv((2, 2), 3)

  @test size(m2(r), 3) == 3
end