jashkenas--coffeescript/test/comments.coffee

# Comments
# --------

# * Single-Line Comments
# * Block Comments

# Note: awkward spacing seen in some tests is likely intentional.

test "comments in objects", ->
  obj1 = {
  # comment
    # comment
      # comment
    one: 1
  # comment
    two: 2
      # comment
  }

  ok Object::hasOwnProperty.call(obj1,'one')
  eq obj1.one, 1
  ok Object::hasOwnProperty.call(obj1,'two')
  eq obj1.two, 2

test "comments in YAML-style objects", ->
  obj2 =
  # comment
    # comment
      # comment
    three: 3
  # comment
    four: 4
      # comment

  ok Object::hasOwnProperty.call(obj2,'three')
  eq obj2.three, 3
  ok Object::hasOwnProperty.call(obj2,'four')
  eq obj2.four, 4

test "comments following operators that continue lines", ->
  sum =
    1 +
    1 + # comment
    1
  eq 3, sum

test "comments in functions", ->
  fn = ->
  # comment
    false
    false   # comment
    false
    # comment

  # comment
    true

  ok fn()

  fn2 = -> #comment
    fn()
    # comment

  ok fn2()

test "trailing comment before an outdent", ->
  nonce = {}
  fn3 = ->
    if true
      undefined # comment
    nonce

  eq nonce, fn3()

test "comments in a switch", ->
  nonce = {}
  result = switch nonce #comment
    # comment
    when false then undefined
    # comment
    when null #comment
      undefined
    else nonce # comment

  eq nonce, result

test "comment with conditional statements", ->
  nonce = {}
  result = if false # comment
    undefined
  #comment
  else # comment
    nonce
    # comment
  eq nonce, result

test "spaced comments with conditional statements", ->
  nonce = {}
  result = if false
    undefined

  # comment
  else if false
    undefined

  # comment
  else
    nonce

  eq nonce, result


# Block Comments

###
  This is a here-comment.
  Kind of like a heredoc.
###

test "block comments in objects", ->
  a = {}
  b = {}
  obj = {
    a: a
    ###
    comment
    ###
    b: b
  }

  eq a, obj.a
  eq b, obj.b

test "block comments in YAML-style", ->
  a = {}
  b = {}
  obj =
    a: a
    ###
    comment
    ###
    b: b

  eq a, obj.a
  eq b, obj.b


test "block comments in functions", ->
  nonce = {}

  fn1 = ->
    true
    ###
    false
    ###

  ok fn1()

  fn2 =  ->
    ###
    block comment
    ###
    nonce

  eq nonce, fn2()

  fn3 = ->
    nonce
  ###
  block comment
  ###

  eq nonce, fn3()

  fn4 = ->
    one = ->
      ###
        block comment
      ###
      two = ->
        three = ->
          nonce

  eq nonce, fn4()()()()

test "block comments inside class bodies", ->
  class A
    a: ->

    ###
    Comment
    ###
    b: ->

  ok A.prototype.b instanceof Function

  class B
    ###
    Comment
    ###
    a: ->
    b: ->

  ok B.prototype.a instanceof Function

test "#2037: herecomments shouldn't imply line terminators", ->
  do (-> ### ###; fail)

test "#2916: block comment before implicit call with implicit object", ->
  fn = (obj) -> ok obj.a
  ### ###
  fn
    a: yes

test "#3132: Format single-line block comment nicely", ->
  input = """
  ### Single-line block comment without additional space here => ###"""

  result = """

  /* Single-line block comment without additional space here => */


  """
  eq CoffeeScript.compile(input, bare: on), result

test "#3132: Format multi-line block comment nicely", ->
  input = """
  ###
  # Multi-line
  # block
  # comment
  ###"""

  result = """

  /*
   * Multi-line
   * block
   * comment
   */


  """
  eq CoffeeScript.compile(input, bare: on), result

test "#3132: Format simple block comment nicely", ->
  input = """
  ###
  No
  Preceding hash
  ###"""

  result = """

  /*
  No
  Preceding hash
   */


  """

  eq CoffeeScript.compile(input, bare: on), result

test "#3132: Format indented block-comment nicely", ->
  input = """
  fn = () ->
    ###
    # Indented
    Multiline
    ###
    1"""

  result = """
  var fn;

  fn = function() {

    /*
     * Indented
    Multiline
     */
    return 1;
  };

  """
  eq CoffeeScript.compile(input, bare: on), result

# Although adequately working, block comment-placement is not yet perfect.
# (Considering a case where multiple variables have been declared …)
test "#3132: Format jsdoc-style block-comment nicely", ->
  input = """
  ###*
  # Multiline for jsdoc-"@doctags"
  # 
  # @type {Function}
  ###
  fn = () -> 1
  """

  result = """
  
  /**
   * Multiline for jsdoc-"@doctags"
   * 
   * @type {Function}
   */
  var fn;
  
  fn = function() {
    return 1;
  };
  
  """
  eq CoffeeScript.compile(input, bare: on), result

# Although adequately working, block comment-placement is not yet perfect.
# (Considering a case where multiple variables have been declared …)
test "#3132: Format hand-made (raw) jsdoc-style block-comment nicely", ->
  input = """
  ###*
   * Multiline for jsdoc-"@doctags"
   * 
   * @type {Function}
  ###
  fn = () -> 1
  """

  result = """
  
  /**
   * Multiline for jsdoc-"@doctags"
   * 
   * @type {Function}
   */
  var fn;
  
  fn = function() {
    return 1;
  };
  
  """
  eq CoffeeScript.compile(input, bare: on), result

# Although adequately working, block comment-placement is not yet perfect.
# (Considering a case where multiple variables have been declared …)
test "#3132: Place block-comments nicely", ->
  input = """
  ###*
  # A dummy class definition
  # 
  # @class
  ###
  class DummyClass
    
    ###*
    # @constructor
    ###
    constructor: ->
  
    ###*
    # Singleton reference
    # 
    # @type {DummyClass}
    ###
    @instance = new DummyClass()
  
  """

  result = """
  
  /**
   * A dummy class definition
   * 
   * @class
   */
  var DummyClass;
  
  DummyClass = (function() {
  
    /**
     * @constructor
     */
    function DummyClass() {}
  
  
    /**
     * Singleton reference
     * 
     * @type {DummyClass}
     */
  
    DummyClass.instance = new DummyClass();
  
    return DummyClass;
  
  })();
  
  """
  eq CoffeeScript.compile(input, bare: on), result

test "#3638: Demand a whitespace after # symbol", ->
  input = """
  ###
  #No
  #whitespace
  ###"""

  result = """

  /*
  #No
  #whitespace
   */


  """

  eq CoffeeScript.compile(input, bare: on), result