using .ExpressionProcessing

expressions = Vector{Expr}(undef, 1)
variables = Matrix{Float64}(undef, 1,2)
parameters = Vector{Vector{Float64}}(undef, 1)

# Resulting value should be 10
expressions[1] = :(x1 + 1 * x2 + p1)
variables[1,1] = 2
variables[1,2] = 3
parameters[1] = Vector{Float64}(undef, 1)
parameters[1][1] = 5

@testset "Test conversion expression element" begin
	reference1 = ExpressionElement(FLOAT64, reinterpret(Int64, 1.0))
	reference2 = ExpressionElement(INDEX, reinterpret(Int64, 1))
	reference3 = ExpressionElement(OPERATOR, reinterpret(Int64, ADD))
	
	@test isequal(reference1, ExpressionProcessing.convert_to_ExpressionElement(1.0))
	@test isequal(reference2, ExpressionProcessing.convert_to_ExpressionElement(1))
	@test isequal(reference3, ExpressionProcessing.convert_to_ExpressionElement(ADD))
end

@testset "Test conversion to postfix" begin
	reference = PostfixType()

	append!(reference, [ExpressionProcessing.convert_to_ExpressionElement(1), ExpressionProcessing.convert_to_ExpressionElement(1.0), ExpressionProcessing.convert_to_ExpressionElement(2), ExpressionProcessing.convert_to_ExpressionElement(MULTIPLY), 
	ExpressionProcessing.convert_to_ExpressionElement(ADD), ExpressionProcessing.convert_to_ExpressionElement(-1), ExpressionProcessing.convert_to_ExpressionElement(ADD)])
	postfix = expr_to_postfix(expressions[1])

	@test isequal(reference, postfix)

	# TODO: Do more complex expressions because these have led to errors in the past
end