Incorporate backward tests

Author: dannys4

test/complex_backward.jl

@@ -0,0 +1,7 @@
+using FFTA, Test
+
+@testset verbose = true "bfft 1D complex, size $N" for N in [8, 11, 15, 100]
+    x = ones(ComplexF64, N)
+    y = bfft(x)
+    @test y[1] ≈ N && y[2:end] ≈ 0*x[2:end] atol=1e-12
+end

test/ffta.jl renamed to test/complex_forward.jl

@@ -1,6 +1,6 @@
 using FFTA, Test
 
-for N in [8, 11, 15, 100]
+@testset verbose = true "fft 1D complex, size $N" for N in [8, 11, 15, 100]
     x = zeros(ComplexF64, N)
     x[1] = 1
     y = fft(x)

test/runtests.jl

@@ -1,5 +1,6 @@
 using Test
 
 @testset verbose = true "Unit Tests" begin
-    include("ffta.jl")
+    include("complex_forward.jl")
+    include("complex_backward.jl")
 end