Version 1

[yaffs-website] / node_modules / for-each / test / test.js

diff --git a/node_modules/for-each/test/test.js b/node_modules/for-each/test/test.js
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+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()
+})
+