Move testhelper imports to the top of test files (#1336)

This is a matter of style, but it makes it easier to see which test
helpers are being imported. This also helps avoid duplicate imports in
the test files.

Author: jishnub

test/adjtrans.jl

@@ -11,6 +11,9 @@ const BASE_TEST_PATH = joinpath(Sys.BINDIR, "..", "share", "julia", "test")
 isdefined(Main, :OffsetArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "OffsetArrays.jl"))
 using .Main.OffsetArrays
 
+isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
+using .Main.ImmutableArrays
+
 @testset "Adjoint and Transpose inner constructor basics" begin
     intvec, intmat = [1, 2], [1 2; 3 4]
     # Adjoint/Transpose eltype must match the type of the Adjoint/Transpose of the input eltype
@@ -250,9 +253,6 @@ end
     @test convert(Transpose{Float64,Matrix{Float64}}, Transpose(intmat))::Transpose{Float64,Matrix{Float64}} == Transpose(intmat)
 end
 
-isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
-using .Main.ImmutableArrays
-
 @testset "Adjoint and Transpose convert methods to AbstractArray" begin
     # tests corresponding to #34995
     intvec, intmat = [1, 2], [1 2 3; 4 5 6]
@@ -593,9 +593,6 @@ end
     @test pointer(Transpose(D)) === pointer(D)
 end
 
-isdefined(Main, :OffsetArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "OffsetArrays.jl"))
-using .Main.OffsetArrays
-
 @testset "offset axes" begin
     s = Base.Slice(-3:3)'
     @test axes(s) === (Base.OneTo(1), Base.IdentityUnitRange(-3:3))

test/bidiag.jl

@@ -24,6 +24,9 @@ using .Main.OffsetArrays
 isdefined(Main, :SizedArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "SizedArrays.jl"))
 using .Main.SizedArrays
 
+isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
+using .Main.ImmutableArrays
+
 include("testutils.jl") # test_approx_eq_modphase
 
 n = 10 #Size of test matrix
@@ -787,9 +790,6 @@ end
     @test c \ A ≈ c \ Matrix(A)
 end
 
-isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
-using .Main.ImmutableArrays
-
 @testset "Conversion to AbstractArray" begin
     # tests corresponding to #34995
     dv = ImmutableArray([1, 2, 3, 4])

test/diagonal.jl

@@ -21,6 +21,9 @@ using .Main.FillArrays
 isdefined(Main, :SizedArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "SizedArrays.jl"))
 using .Main.SizedArrays
 
+isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
+using .Main.ImmutableArrays
+
 const n=12 # Size of matrix problem to test
 Random.seed!(1)
 
@@ -1127,10 +1130,6 @@ end
     end
 end
 
-const BASE_TEST_PATH = joinpath(Sys.BINDIR, "..", "share", "julia", "test")
-isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
-using .Main.ImmutableArrays
-
 @testset "Conversion to AbstractArray" begin
     # tests corresponding to #34995
     d = ImmutableArray([1, 2, 3, 4])

test/hessenberg.jl

@@ -10,6 +10,9 @@ const BASE_TEST_PATH = joinpath(Sys.BINDIR, "..", "share", "julia", "test")
 isdefined(Main, :SizedArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "SizedArrays.jl"))
 using .Main.SizedArrays
 
+isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
+using .Main.ImmutableArrays
+
 # for tuple tests below
 ≅(x,y) = all(p -> p[1] ≈ p[2], zip(x,y))
 
@@ -218,9 +221,6 @@ end
     end
 end
 
-isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
-using .Main.ImmutableArrays
-
 @testset "Conversion to AbstractArray" begin
     # tests corresponding to #34995
     A = ImmutableArray([1 2 3; 4 5 6; 7 8 9])

test/symmetric.jl

@@ -14,6 +14,9 @@ using .Main.Quaternions
 isdefined(Main, :SizedArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "SizedArrays.jl"))
 using .Main.SizedArrays
 
+isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
+using .Main.ImmutableArrays
+
 Random.seed!(1010)
 
 @testset "Pauli σ-matrices: $σ" for σ in map(Hermitian,
@@ -722,10 +725,6 @@ end
     end
 end
 
-const BASE_TEST_PATH = joinpath(Sys.BINDIR, "..", "share", "julia", "test")
-isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
-using .Main.ImmutableArrays
-
 @testset "Conversion to AbstractArray" begin
     # tests corresponding to #34995
     immutablemat = ImmutableArray([1 2 3; 4 5 6; 7 8 9])

test/triangular.jl

@@ -15,6 +15,9 @@ using .Main.SizedArrays
 isdefined(Main, :FillArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "FillArrays.jl"))
 using .Main.FillArrays
 
+isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
+using .Main.ImmutableArrays
+
 n = 9
 Random.seed!(123)
 
@@ -243,9 +246,6 @@ end
 # dimensional correctness:
 const BASE_TEST_PATH = joinpath(Sys.BINDIR, "..", "share", "julia", "test")
 
-isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
-using .Main.ImmutableArrays
-
 @testset "AbstractArray constructor should preserve underlying storage type" begin
     # tests corresponding to #34995
     local m = 4

test/tridiag.jl

@@ -23,6 +23,9 @@ using .Main.OffsetArrays
 isdefined(Main, :SizedArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "SizedArrays.jl"))
 using .Main.SizedArrays
 
+isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
+using .Main.ImmutableArrays
+
 include("testutils.jl") # test_approx_eq_modphase
 
 #Test equivalence of eigenvectors/singular vectors taking into account possible phase (sign) differences
@@ -769,9 +772,6 @@ end
     @test ishermitian(S)
 end
 
-isdefined(Main, :ImmutableArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "ImmutableArrays.jl"))
-using .Main.ImmutableArrays
-
 @testset "Conversion to AbstractArray" begin
     # tests corresponding to #34995
     v1 = ImmutableArray([1, 2])
@@ -796,8 +796,6 @@ end
     end
 end
 
-isdefined(Main, :SizedArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "SizedArrays.jl"))
-using .Main.SizedArrays
 @testset "non-number eltype" begin
     @testset "sum for SymTridiagonal" begin
         dv = [SizedArray{(2,2)}(rand(1:2048,2,2)) for i in 1:10]