text: var test = require("tape")
      , forEach = require("..")
  
  test("forEach calls each iterator", function (t) {
      var count = 0
      t.plan(4)
      forEach({ a: 1, b: 2 }, function (value, key) {
          if (count === 0) {
              t.equal(value, 1)
              t.equal(key, "a")
          } else {
              t.equal(value, 2)
              t.equal(key, "b")
          }
          count++
      })
  })
  
  test("forEach calls iterator with correct this value", function (t) {
      var thisValue = {}
  
      t.plan(1)
  
      forEach([0], function () {
          t.equal(this, thisValue)
      }, thisValue)
  })
  
  test('second argument: iterator', function (t) {
      var arr = []
      t.throws(function () { forEach(arr) }, TypeError, 'undefined is not a function')
      t.throws(function () { forEach(arr, null) }, TypeError, 'null is not a function')
      t.throws(function () { forEach(arr, '') }, TypeError, 'string is not a function')
      t.throws(function () { forEach(arr, /a/) }, TypeError, 'regex is not a function')
      t.throws(function () { forEach(arr, true) }, TypeError, 'true is not a function')
      t.throws(function () { forEach(arr, false) }, TypeError, 'false is not a function')
      t.throws(function () { forEach(arr, NaN) }, TypeError, 'NaN is not a function')
      t.throws(function () { forEach(arr, 42) }, TypeError, '42 is not a function')
      t.doesNotThrow(function () { forEach(arr, function () {}) }, 'function is a function')
      t.doesNotThrow(function () { forEach(arr, setTimeout) }, 'setTimeout is a function')
      if (typeof window !== 'undefined') {
          t.doesNotThrow(function () { forEach(arr, window.alert) }, 'alert is a function')
      }
      t.end()
  })
  
  test('array', function (t) {
      var arr = [1, 2, 3]
  
      t.test('iterates over every item', function (st) {
          var index = 0
          forEach(arr, function () { index += 1 })
          st.equal(index, arr.length, 'iterates ' + arr.length + ' times')
          st.end()
      })
  
      t.test('first iterator argument', function (st) {
          var index = 0
          st.plan(arr.length)
          forEach(arr, function (item) {
              st.equal(arr[index], item, 'item ' + index + ' is passed as first argument')
              index += 1
          })
          st.end();
      })
  
      t.test('second iterator argument', function (st) {
          var counter = 0
          st.plan(arr.length)
          forEach(arr, function (item, index) {
              st.equal(counter, index, 'index ' + index + ' is passed as second argument')
              counter += 1
          })
          st.end();
      })
  
      t.test('third iterator argument', function (st) {
          st.plan(arr.length)
          forEach(arr, function (item, index, array) {
              st.deepEqual(arr, array, 'array is passed as third argument')
          })
          st.end();
      })
  
      t.test('context argument', function (st) {
          var context = {}
          forEach([], function () {
              st.equal(this, context, '"this" is the passed context')
          }, context)
          st.end()
      })
  
      t.end()
  })
  
  test('object', function (t) {
      var obj = {
          a: 1,
          b: 2,
          c: 3
      }
      var keys = ['a', 'b', 'c']
  
      var F = function () {
          this.a = 1
          this.b = 2
      }
      F.prototype.c = 3
      var fKeys = ['a', 'b']
  
      t.test('iterates over every object literal key', function (st) {
          var counter = 0
          forEach(obj, function () { counter += 1 })
          st.equal(counter, keys.length, 'iterated ' + counter + ' times')
          st.end()
      })
  
      t.test('iterates only over own keys', function (st) {
          var counter = 0
          forEach(new F(), function () { counter += 1 })
          st.equal(counter, fKeys.length, 'iterated ' + fKeys.length + ' times')
          st.end()
      })
  
      t.test('first iterator argument', function (st) {
          var index = 0
          st.plan(keys.length)
          forEach(obj, function (item) {
              st.equal(obj[keys[index]], item, 'item at key ' + keys[index] + ' is passed as first argument')
              index += 1
          })
          st.end()
      })
  
      t.test('second iterator argument', function (st) {
          var counter = 0
          st.plan(keys.length)
          forEach(obj, function (item, key) {
              st.equal(keys[counter], key, 'key ' + key + ' is passed as second argument')
              counter += 1
          })
          st.end()
      })
  
      t.test('third iterator argument', function (st) {
          st.plan(keys.length)
          forEach(obj, function (item, key, object) {
              st.deepEqual(obj, object, 'object is passed as third argument')
          })
          st.end()
      })
  
      t.test('context argument', function (st) {
          var context = {}
          forEach({}, function () {
              st.equal(this, context, '"this" is the passed context')
          }, context)
          st.end()
      })
  
      t.end()
  })
  
  
  test('string', function (t) {
      var str = 'str'
      t.test('second iterator argument', function (st) {
          var counter = 0
          st.plan(str.length * 2 + 1)
          forEach(str, function (item, index) {
              st.equal(counter, index, 'index ' + index + ' is passed as second argument')
              st.equal(str.charAt(index), item)
              counter += 1
          })
          st.equal(counter, str.length, 'iterates ' + str.length + ' times')
          st.end()
      })
      t.end()
  })
  
  