gem 'minitest'
require 'minitest/autorun'
require 'ruby2js/filter/functions'
require 'ruby2js/filter/node'
require 'ruby2js/filter/require'

describe "sourcemap" do

  def to_sm(string, *filters)
    _(Ruby2JS.convert(string, filters: filters, file: __FILE__).sourcemap)
  end

  it "should handle null input" do
    to_sm("").
      must_equal(
        version: 3,
        file: __FILE__,
        sources: [],
        names: [],
        mappings: ""
      )
  end

  describe "simple filters" do
    it "should work without filters" do
      to_sm("x = 123; puts x").
        must_equal(
          version: 3, 
          file: __FILE__, 
          sources: [__FILE__], 
          names: ["x"],
          mappings: "AAAAA,QAAI,GAAJ,EAAS,KAAKA,CAAL"
        )
    end

    it "should produce different results with a filter" do
      to_sm("x = 123; puts x", Ruby2JS::Filter::Functions).
        must_equal(
          version: 3,
          file: __FILE__,
          sources: [__FILE__],
          names: ["x"],
          mappings: "AAAAA,QAAI,GAAJ,SAAS,KAAKA,CAAL"
        )
    end
  end

  describe "prepended imports" do
    it "should work without filters" do
      to_sm("system 'echo hi'\n").
        must_equal(
          version: 3,
          file: __FILE__,
          sources: [__FILE__],
          names: [],
          mappings: "AAAA,OAAO,SAAP"
        )
    end
  
    it "should work with a filter that inserts import statements" do
      to_sm("system 'echo hi'\n", Ruby2JS::Filter::Node).
        must_equal(
          version: 3,
          file: __FILE__,
          sources: [__FILE__],
          names: [],
          mappings: ";aAAA,UAAO,SAAP"
        )
    end
  end

  it "should handle requires" do
    dir = File.join(__dir__, 'require')
    sources = [File.join(dir, "test2.rb"), File.join(dir, "test1.rb"), File.join(dir, "test3.js.rb")]
    to_sm('require "require/test1.rb"', Ruby2JS::Filter::Require).
      must_equal(
        version: 3,
        file: __FILE__,
        sources: sources,
        names: ['console'],
        mappings: "AAAAA,YAAY,OAAZ,eEAY,OAAZ"
      )
  end
end