Tests for Array.prototype.find

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS Array.prototype.find.length is 1
PASS Array.prototype.find.name is 'find'
PASS [undefined, 0, null, false, ''].find(passUndefined) is undefined
PASS [undefined, 0, null, false, ''].find(passZero) is 0
PASS [undefined, 0, null, false, ''].find(passNull) is null
PASS [undefined, 0, null, false, ''].find(passFalse) is false
PASS [undefined, 0, null, false, ''].find(passEmptyString) is ''
PASS [0, null, false, ''].find(passUndefined) is undefined
PASS [undefined, 0, false, ''].find(passNull) is undefined
PASS [undefined, 0, null, ''].find(passFalse) is undefined
PASS [undefined, 0, null, false].find(passEmptyString) is undefined
PASS [undefined, null, false, ''].find(passZero) is undefined
Array with holes
PASS (new Array(20)).find(passUndefined) is undefined
PASS arrayWithHoles.find(passUndefined) is undefined
PASS arrayWithHoles.find(passZero) is 0
PASS arrayWithHoles.find(passNull) is null
PASS arrayWithHoles.find(passFalse) is false
PASS arrayWithHoles.find(passEmptyString) is ''
Generic Object
PASS toObject([undefined, 0, null, false, '']).find(passUndefined) is undefined
PASS toObject([undefined, 0, null, false, '']).find(passZero) is 0
PASS toObject([undefined, 0, null, false, '']).find(passNull) is null
PASS toObject([undefined, 0, null, false, '']).find(passFalse) is false
PASS toObject([undefined, 0, null, false, '']).find(passEmptyString) is ''
PASS toObject([0, null, false, '']).find(passUndefined) is undefined
PASS toObject([undefined, 0, false, '']).find(passNull) is undefined
PASS toObject([undefined, 0, null, '']).find(passFalse) is undefined
PASS toObject([undefined, 0, null, false]).find(passEmptyString) is undefined
PASS toObject([undefined, null, false, '']).find(passZero) is undefined
PASS toObject(new Array(20)).find(passUndefined) is undefined
Array-like object with invalid lengths
PASS var obj = { 0: 1, 1: 2, 2: 3, length: 0 }; Array.prototype.find.call(obj, throwError) is undefined.
PASS var obj = { 0: 1, 1: 2, 2: 3, length: -0 }; Array.prototype.find.call(obj, throwError) is undefined.
PASS var obj = { 0: 1, 1: 2, 2: 3, length: -3 }; Array.prototype.find.call(obj, throwError) is undefined.
Modification during search
PASS [0,1,2,3,4,5,6,7,8,9].find(findItemAddedDuringSearch) is undefined
PASS [0,1,2,3,4,5,6,7,8,9].find(findItemRemovedDuringSearch) is undefined
Exceptions
PASS Array.prototype.find.call(undefined, function() {}) threw exception TypeError: Array.prototype.find requires that |this| not be null or undefined.
PASS Array.prototype.find.call(null, function() {}) threw exception TypeError: Array.prototype.find requires that |this| not be null or undefined.
PASS [].find(1) threw exception TypeError: Array.prototype.find callback must be a function.
PASS [].find('hello') threw exception TypeError: Array.prototype.find callback must be a function.
PASS [].find([]) threw exception TypeError: Array.prototype.find callback must be a function.
PASS [].find({}) threw exception TypeError: Array.prototype.find callback must be a function.
PASS [].find(null) threw exception TypeError: Array.prototype.find callback must be a function.
PASS [].find(undefined) threw exception TypeError: Array.prototype.find callback must be a function.
Callbacks in the expected order and *not* skipping holes
find callback called with index 0
find callback called with index 1
find callback called with index 2
find callback called with index 3
find callback called with index 4
find callback called with index 5
find callback called with index 6
find callback called with index 7
PASS numberOfCallbacksInFindInArrayWithHoles() is 8
PASS successfullyParsed is true

TEST COMPLETE