require "test_helper"

class SourceLineTest < Test::Unit::TestCase
  def test_line_that_begins_with_double_slash_should_be_a_comment
    assert source_line("//").comment?
    assert source_line("//test").comment?
    assert source_line("//= require").comment?
    assert source_line("//= require <foo>").comment?
    assert source_line(" //").comment?
    assert source_line("\t//").comment?
  end

  def test_line_that_begins_a_multiline_comment
    assert source_line(" /*").begins_multiline_comment?
    assert source_line(" /**").begins_multiline_comment?
  end

  def test_line_that_begins_a_pdoc_comment
    assert !source_line(" /*").begins_pdoc_comment?
    assert source_line(" /**").begins_pdoc_comment?
  end

  def test_line_that_ends_a_multiline_comment
    assert source_line(" */").ends_multiline_comment?
    assert source_line(" **/").ends_multiline_comment?
  end

  def test_line_that_ends_a_pdoc_comment
    assert !source_line(" */").ends_pdoc_comment?
    assert source_line(" **/").ends_pdoc_comment?
  end

  def test_line_that_contains_but_does_not_begin_with_double_slash_should_not_be_a_comment
    assert !source_line("f //").comment?
    assert !source_line("f //= require <foo>").comment?
  end

  def test_comment_should_be_extracted_from_comment_lines
    assert_equal "test", source_line("//test").comment
    assert_equal " test", source_line("// test").comment
    assert_equal nil, source_line("f //test").comment
  end
  
  def test_line_that_contains_require_comment_should_be_a_require
    assert source_line("//= require <foo>").require?
    assert !source_line("//= require<foo>").require?
    assert source_line("//= require \"foo\"").require?
    assert !source_line("//= require <foo> f").require?
  end
  
  def test_require_should_be_extracted_from_require_lines
    assert_nil source_line("//= require").require
    assert_equal "<foo>", source_line("//= require <foo>").require
    assert_equal "<foo>", source_line("//= require   <foo> ").require
    assert_equal "\"foo\"", source_line("//= require \"foo\"").require
  end

  def test_line_that_contains_a_provide_comment_should_be_a_provide
    assert source_line("//= provide \"../assets\"").provide?
    assert !source_line("//= provide").provide?
    assert !source_line("//= provide <../assets>").provide?
  end
  
  def test_provide_should_be_extracted_from_provide_lines
    assert_nil source_line("//= provide").provide
    assert_equal "../assets", source_line("//= provide \"../assets\"").provide
  end

  def test_inspect_should_include_source_file_location_and_line_number
    environment = environment_for_fixtures
    pathname    = Sprockets::Pathname.new(environment, "/a/b/c.js")
    source_file = Sprockets::SourceFile.new(environment, pathname)
    assert_equal "line 25 of #{File.expand_path("/a/b/c.js")}", source_line("hello", source_file, 25).inspect
  end
  
  def test_interpolation_of_constants
    assert_equal %(var VERSION = "1.0";\n), source_line('var VERSION = "<%= VERSION %>";').to_s("VERSION" => "1.0")
  end
  
  def test_interpolation_of_missing_constant_raises_undefined_constant_error
    assert_raises(Sprockets::UndefinedConstantError) do
      source_line('<%= NONEXISTENT %>').to_s("VERSION" => "1.0")
    end
  end
  
  def test_to_s_should_strip_trailing_whitespace_before_adding_line_ending
    assert_equal "hello();\n", source_line("hello();     \t  \r\n").to_s({})
  end
end