add tests

Author: CarloLucibello

test/data.jl

@@ -75,3 +75,52 @@
     Flux.train!(loss, [θ], ncycle(d, 10), Descent(0.1))
     @test norm(θ .- 1) < 1e-10
 end
+
+
+@testset "CMUDict" begin
+    @test cmudict()["CATASTROPHE"] == :[K,AH0,T,AE1,S,T,R,AH0,F,IY0].args
+
+    @test length(CMUDict.phones()) == 39
+
+    @test length(CMUDict.symbols()) == 84
+end
+
+@testset "MNIST" begin
+    @test MNIST.images()[1] isa Matrix
+    @test MNIST.labels() isa Vector{Int64}
+end
+
+@testset "FashionMNIST" begin
+    @test FashionMNIST.images()[1] isa Matrix
+    @test FashionMNIST.labels() isa Vector{Int64}
+end
+
+@testset "Sentiment" begin
+    @test Data.Sentiment.train() isa Vector{Data.Tree{Any}}
+end
+
+@testset "Iris" begin
+    @test Iris.features() isa Matrix
+    @test size(Iris.features()) == (4,150)
+
+    @test Iris.labels() isa Vector{String}
+    @test size(Iris.labels()) == (150,)
+end
+
+
+@testset "Housing" begin
+    @test Housing.features() isa Matrix # test broken due to SSL certifate expiration problem
+    @test size(Housing.features()) == (506, 13)
+
+    @test Housing.targets() isa Array{Float64}
+    @test size(Housing.targets()) == (506, 1)
+end
+
+@testset "Tree show" begin
+    # testcase for issue #1354
+    # testing that methods(Base.show) does not throw. Having something more specific would be too fragile
+    buf = IOBuffer()
+    Base.show(buf, filter(x->x.module == Flux, methods(Base.show).ms))
+    str_repr = String(take!(buf))
+    @test !isempty(str_repr)
+end