# encoding: UTF-8

require 'spec_helper'
require 'date'

describe "FFI_Yajl::Encoder" do

  let(:options) { {} }

  let(:encoder) { FFI_Yajl::Encoder.new(options) }

  it "encodes hashes in keys as strings", :ruby_gte_193 => true do
    ruby = { {'a' => 'b'} => 2 }
    expect(encoder.encode(ruby)).to eq('{"{\"a\"=>\"b\"}":2}')
  end

  it "encodes arrays in keys as strings", :ruby_gte_193 => true do
    ruby = { [0,1] => 2 }
    expect(encoder.encode(ruby)).to eq('{"[0, 1]":2}')
  end

  it "encodes nil in keys as strings" do
    ruby = { nil => 2 }
    expect(encoder.encode(ruby)).to eq('{"":2}')
  end

  it "encodes true in keys as strings" do
    ruby = { true => 2 }
    expect(encoder.encode(ruby)).to eq('{"true":2}')
  end

  it "encodes false in keys as strings" do
    ruby = { false => 2 }
    expect(encoder.encode(ruby)).to eq('{"false":2}')
  end

  it "encodes fixnums in keys as strings" do
    ruby = { 1 => 2 }
    expect(encoder.encode(ruby)).to eq('{"1":2}')
  end

  it "encodes floats in keys as strings" do
    ruby = { 1.1 => 2 }
    expect(encoder.encode(ruby)).to eq('{"1.1":2}')
  end

  it "encodes bignums in keys as strings" do
    ruby = { 12345678901234567890 => 2 }
    expect(encoder.encode(ruby)).to eq('{"12345678901234567890":2}')
  end

  it "encodes objects in keys as strings" do
    o = Object.new
    ruby = { o => 2 }
    expect(encoder.encode(ruby)).to eq(%Q{{"#{o.to_s}":2}})
  end

  it "encodes an object in a key which has a #to_json method as strings" do
    class Thing
      def to_json(*a)
        "{}"
      end
    end
    o = Thing.new
    ruby = { o => 2 }
    expect(encoder.encode(ruby)).to eq(%Q{{"#{o.to_s}":2}})
  end

  # XXX: 127 == YAJL_MAX_DEPTH hardcodedness, zero control for us, it isn't even a twiddleable #define
  it "raises an exception for deeply nested arrays" do
    root = []
    a = root
    127.times { |_| a << []; a = a[0] }
    expect{ encoder.encode(root) }.to raise_error(FFI_Yajl::EncodeError)
  end

  it "raises an exception for deeply nested hashes" do
    root = {}
    a = root
    127.times {|_| a["a"] = {}; a = a["a"] }
    expect{ encoder.encode(root) }.to raise_error(FFI_Yajl::EncodeError)
  end

  it "encodes symbols in keys as strings" do
    ruby = { :thing => 1 }
    expect(encoder.encode(ruby)).to eq('{"thing":1}')
  end

  it "encodes symbols in values as strings" do
    ruby = { "thing" => :one }
    expect(encoder.encode(ruby)).to eq('{"thing":"one"}')
  end

  it "can encode 32-bit unsigned ints" do
    ruby = { "gid"=>4294967294 }
    expect(encoder.encode(ruby)).to eq('{"gid":4294967294}')
  end

  context "when the encoder has nil passed in for options" do
    let(:encoder) { FFI_Yajl::Encoder.new(nil) }

    it "does not throw an exception" do
      ruby = { "foo" => "bar" }
      expect(encoder.encode(ruby)).to eq("{\"foo\":\"bar\"}")
    end
  end

  it "can encode Date objects" do
    ruby = Date.parse('2001-02-03')
    expect(encoder.encode(ruby)).to eq( %q{"2001-02-03"} )
  end

  context "when encoding Time objects in UTC timezone" do
    before do
      @saved_tz = ENV['TZ']
      ENV['TZ'] = 'UTC'
    end

    after do
      ENV['TZ'] = @saved_tz
    end

    it "encodes them correctly" do
      ruby = Time.local(2001, 02, 02, 21, 05, 06)
      expect(encoder.encode(ruby)).to eq( %q{"2001-02-02 21:05:06 +0000"} )
    end
  end

  it "can encode DateTime objects" do
    ruby = DateTime.parse('2001-02-03T04:05:06.1+07:00')
    expect(encoder.encode(ruby)).to eq( %q{"2001-02-03T04:05:06+07:00"} )
  end

  describe "testing .to_json for Objects" do
    class NoToJson; end
    class HasToJson
      def to_json(*args)
        "{}"
      end
    end

    it "calls .to_s for objects without .to_json" do
      expect(encoder.encode(NoToJson.new)).to match(/^"#<NoToJson:\w+>"$/)
    end

    it "calls .to_json for objects wit .to_json" do
      expect(encoder.encode(HasToJson.new)).to eq("{}")
    end
  end

  context "when encoding invalid utf-8" do
    ruby = {
      "automatic"=>{
        "etc"=>{
          "passwd"=>{
            "root"=>{"dir"=>"/root", "gid"=>0, "uid"=>0, "shell"=>"/bin/sh", "gecos"=>"Elan Ruusam\xc3\xa4e"},
            "glen"=>{"dir"=>"/home/glen", "gid"=>500, "uid"=>500, "shell"=>"/bin/bash", "gecos"=>"Elan Ruusam\xE4e"},
          }
        },
      },
    }

    it "raises an error on invalid json" do
      expect{ encoder.encode(ruby) }.to raise_error(FFI_Yajl::EncodeError, "Invalid UTF-8 string: cannot encode to UTF-8")
    end

    context "when validate_utf8 is off" do
      let(:options) {  { :validate_utf8 => false } }

      it "does not raise an error" do
        expect{ encoder.encode(ruby) }.not_to raise_error
      end
    end
  end
end