require "helper"
require "inspec/utils/erlang_parser"

describe ErlangParser do
  def parse(c)
    ErlangParser.new.parse(c)
  end

  def parsestr(c)
    parse(c).to_s
  end

  def parse_file(f)
    parse(File.read(f))
  end

  it "parses an empty rabbit file" do
    _(parsestr("")).must_equal ""
  end

  it "parses a file with a comment" do
    _(parsestr("%% -*- mode: erlang -*-\n%%\n")).must_equal "%% -*- mode: erlang -*-\n%%\n"
  end

  it "parse simple root array" do
    _(parsestr("[].\n")).must_equal "{:array=>nil}"
  end

  it "parses a root array with an int" do
    _(parsestr("[1].")).must_equal '{:array=>[{:integer=>"1"@1}]}'
  end

  it "parses a root array with a float" do
    _(parsestr("[1.1].")).must_equal '{:array=>[{:float=>{:integer=>"1"@1, :e=>".1"@2}}]}'
  end

  it "parses a root array with a double quoted string" do
    _(parsestr('["st\"r"].')).must_equal '{:array=>[{:string=>"st\\\\\\"r"@2}]}'
  end

  it "parses a root array with a single quoted string" do
    _(parsestr("['st\\'r'].")).must_equal '{:array=>[{:string=>"st\\\\\'r"@2}]}'
  end

  it "parses a root array with an empty binary" do
    _(parsestr("[<<>>].")).must_equal "{:array=>[{:binary=>nil}]}"
  end

  it "parses a root array with a bit-stream with a string" do
    _(parsestr('[<<"pwd">>].')).must_equal '{:array=>[{:binary=>[{:string=>"pwd"@4, :size=>nil, :type=>nil}]}]}'
  end

  it "parses a root array with a bit-stream with a string and type" do
    _(parsestr('[<<"pwd"/utf8>>].')).must_equal '{:array=>[{:binary=>[{:string=>"pwd"@4, :size=>nil, :type=>{:identifier=>"utf8"@9}}]}]}'
  end

  it "parses a root array with a bit-stream of numbers" do
    _(parsestr("[<<0, 1, 2>>].")).must_equal '{:array=>[{:binary=>[{:integer=>"0"@3, :size=>nil, :type=>nil}, {:integer=>"1"@6, :size=>nil, :type=>nil}, {:integer=>"2"@9, :size=>nil, :type=>nil}]}]}'
  end

  it "parses a root array with a mixed bit-stream of string+numbers" do
    _(parsestr('[<<97, "b", 99>>].')).must_equal '{:array=>[{:binary=>[{:integer=>"97"@3, :size=>nil, :type=>nil}, {:string=>"b"@8, :size=>nil, :type=>nil}, {:integer=>"99"@12, :size=>nil, :type=>nil}]}]}'
  end

  it "parses a root array with a bit-stream of value:size" do
    _(parsestr('[<<0, 1:8, "2":16>>].')).must_equal '{:array=>[{:binary=>[{:integer=>"0"@3, :size=>nil, :type=>nil}, {:integer=>"1"@6, :size=>{:integer=>"8"@8}, :type=>nil}, {:string=>"2"@12, :size=>{:integer=>"16"@15}, :type=>nil}]}]}'
  end

  it "parses a root array with a boolean" do
    _(parsestr("[true].")).must_equal '{:array=>[{:bool=>"true"@1}]}'
  end

  it "parses a root array with an identifier" do
    _(parsestr("[hello_world123].")).must_equal '{:array=>[{:identifier=>"hello_world123"@1}]}'
  end

  it "parses a root array with multiple elements" do
    _(parsestr("[1, \"a\" %%\n, true\n\t].")).must_equal '{:array=>[{:integer=>"1"@1}, {:string=>"a"@5}, {:bool=>"true"@13}]}'
  end

  it "parses a root array with an tuple" do
    _(parsestr("[{}].")).must_equal "{:array=>[{:tuple=>nil}]}"
  end

  it "parses a root array with an tuple" do
    _(parsestr("[{handshake_timeout, 100}].")).must_equal '{:array=>[{:tuple=>[{:identifier=>"handshake_timeout"@2}, {:integer=>"100"@21}]}]}'
  end

  it "parses a root array with a stringy tuple" do
    _(parsestr('[{ab, [{"c", 1},{"d",2}]}].')).must_equal '{:array=>[{:tuple=>[{:identifier=>"ab"@2}, {:array=>[{:tuple=>[{:string=>"c"@9}, {:integer=>"1"@13}]}, {:tuple=>[{:string=>"d"@18}, {:integer=>"2"@21}]}]}]}]}'
  end

  it "parses a complex deep array-tuple mix" do
    _(parsestr("[{rabbit,[{two,[]}]}].")).must_equal '{:array=>[{:tuple=>[{:identifier=>"rabbit"@2}, {:array=>[{:tuple=>[{:identifier=>"two"@11}, {:array=>nil}]}]}]}]}'
  end

  it "parses a complex multi array tuple mix" do
    _(parsestr("[{rabbit,[{two,[]}]}, 3, false].")).must_equal '{:array=>[{:tuple=>[{:identifier=>"rabbit"@2}, {:array=>[{:tuple=>[{:identifier=>"two"@11}, {:array=>nil}]}]}]}, {:integer=>"3"@22}, {:bool=>"false"@25}]}'
  end

  it "parses a complex array-tuple mix with comments" do
    s = '%% -*- mode: erlang -*-
[
  {rabbit,
    [%%

     %% some more text
     {tcp_listeners, [5672]}
   ]}].
'
    _(parsestr(s)).must_equal '{:array=>[{:tuple=>[{:identifier=>"rabbit"@29}, {:array=>[{:tuple=>[{:identifier=>"tcp_listeners"@75}, {:array=>[{:integer=>"5672"@91}]}]}]}]}]}'
  end
end

describe ErlangTransform do
  def parse(c)
    ErlangTransform.new.apply(ErlangParser.new.parse(c))
  end

  it "transforms and empty file" do
    _(parse("")).must_equal ""
  end

  it "transforms an empty array" do
    _(parse("[].")).must_equal []
  end

  it "transforms a simple array with one string" do
    _(parse('["one"].')).must_equal ["one"]
  end

  it "transforms a simple array with an empty string" do
    _(parse("[''].")).must_equal [""]
  end

  it "transforms a simple array with an empty binary" do
    _(parse("[<<>>].")).must_equal [""]
  end

  it "transforms a simple array with a binary string" do
    _(parse('[<<"Hello world!">>].')).must_equal ["Hello world!"]
  end

  it "transforms a simple array with a binary sequence" do
    _(parse('[<<97, "b", 99>>].')).must_equal ["abc"]
  end

  it "transforms a default ascii string" do
    _(parse('[<<"Łぁ">>].')).must_equal ["AA"]
  end

  it "transforms a utf-8 string" do
    _(parse('[<<"Łぁ"/utf8>>].')).must_equal ["Łぁ"]
  end

  it "transforms a utf-16 string" do
    _(parse('[<<"Łぁ"/utf16>>].')).must_equal ["\u0001\u0041\u0030\u0041"]
  end

  it "transforms a utf-32 string" do
    _(parse('[<<"Łぁ"/utf32>>].')).must_equal ["\u0000\u0000\u0001\u0041\u0000\u0000\u0030\u0041"]
  end

  it "transforms a partial bit number sequence" do
    _(parse("[<<1:2,1:6>>].")).must_equal ["A"]
  end

  it "prevents mixing size and type for bit-streams" do
    _(proc { parse("[<<1:8/utf8>>].") }).must_raise RuntimeError
  end

  it "transforms a simple array with multiple values" do
    _(parse('[1, 1.1, true, false, "ok"].')).must_equal [1, 1.1, true, false, "ok"]
  end

  it "transforms a deep array" do
    _(parse("[[[[1]]]].")).must_equal [[[[1]]]]
  end

  it "transforms an empty tuple" do
    _(parse("[{}].")).must_equal [ErlangTransform::Tuple.new]
  end

  it "transforms a tuple with one element" do
    _(parse("[{1}].")).must_equal [ErlangTransform::Tuple.new([1])]
  end

  it "transforms a tuple with multiple elements" do
    _(parse("[{id123, 1, 1.1}].")).must_equal [ErlangTransform::Tuple.new([ErlangTransform::Identifier.new("id123"), 1, 1.1])]
  end

  it "transforms a deep tuple" do
    _(parse("[{{{1}}}].")).must_equal [ErlangTransform::Tuple.new([ErlangTransform::Tuple.new([ErlangTransform::Tuple.new([1])])])]
  end

  it "transforms a deep mix of tuple and array" do
    _(parse("[{[{1}]}].")).must_equal [ErlangTransform::Tuple.new([[ErlangTransform::Tuple.new([1])]])]
  end
end