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<!DOCTYPE html>
<!--
Copyright (c) 2014 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<link rel="import" href="/tracing/base/iteration_helpers.html">
<script>
'use strict';
tr.b.unittest.testSuite(function() {
var comparePossiblyUndefinedValues = tr.b.comparePossiblyUndefinedValues;
var compareArrays = tr.b.compareArrays;
var asArray = tr.b.asArray;
var getOnlyElement = tr.b.getOnlyElement;
var every = tr.b.every;
var getFirstElement = tr.b.getFirstElement;
test('asArray_indexed', function() {
assert.deepEqual(asArray({'0': 2, '1': 4, '2': 6, 'length': 3}), [2, 4, 6]);
});
test('asArray_iterable', function() {
function *iterfunc() {
yield 2;
yield 4;
yield 6;
}
assert.deepEqual(asArray({[Symbol.iterator]: iterfunc}), [2, 4, 6]);
});
test('comparePossiblyUndefinedValues', function() {
function cmp(x, y) {
assert.isDefined(x);
assert.isDefined(y);
return x - y;
}
assert.isBelow(comparePossiblyUndefinedValues(0, 1, cmp), 0);
assert.isAbove(comparePossiblyUndefinedValues(1, 0, cmp), 0);
assert.equal(comparePossiblyUndefinedValues(1, 1, cmp), 0);
assert.isBelow(comparePossiblyUndefinedValues(0, undefined, cmp), 0);
assert.isAbove(comparePossiblyUndefinedValues(undefined, 0, cmp), 0);
assert.equal(comparePossiblyUndefinedValues(undefined, undefined, cmp), 0);
});
test('compareArrays', function() {
function cmp(x, y) {
assert.isDefined(x);
assert.isDefined(y);
return x - y;
}
assert.isBelow(compareArrays([1], [2], cmp), 0);
assert.isAbove(compareArrays([2], [1], cmp), 0);
assert.isBelow(compareArrays([1], [1, 2], cmp), 0);
assert.isAbove(compareArrays([1, 2], [1], cmp), 0);
assert.isBelow(compareArrays([], [1], cmp), 0);
assert.isAbove(compareArrays([1], [], cmp), 0);
assert.isAbove(compareArrays([2], [1], cmp), 0);
assert.equal(compareArrays([], [], cmp), 0);
assert.equal(compareArrays([1], [1], cmp), 0);
});
test('every_empty', function() {
assert.isTrue(every([], x => false));
});
test('every_true', function() {
assert.isTrue(every([2, 4, 6], x => x % 2 === 0));
});
test('every_false', function() {
assert.isTrue(!every([2, 3, 4], x => x % 2 === 0));
});
test('getOnlyElement_throwsIfEmpty', function() {
assert.throws(() => getOnlyElement([]),
'getOnlyElement was passed an empty iterable.');
});
test('getOnlyElement_oneItem', function() {
assert.equal(getOnlyElement([1]), 1);
});
test('getOnlyElement_twoItems', function() {
assert.throws(() => getOnlyElement([1, 2]),
'getOnlyElement was passed an iterable with multiple elements.');
});
test('getFirstElement_throwsIfEmpty', function() {
assert.throws(() => getFirstElement([]),
'getFirstElement was passed an empty iterable.');
});
test('getFirstElement_oneItem', function() {
assert.equal(getFirstElement([1]), 1);
});
test('getFirstElement_twoItems', function() {
assert.equal(getFirstElement([1, 2]), 1);
});
test('group', function() {
// Empty array
var srcArray = [];
var fn = function(curr) { return (curr % 2); };
var dstDict = {};
assert.deepEqual(tr.b.group(srcArray, fn), dstDict);
// Non-empty array
var srcArray = [0, 1, 2, 3, 4, 5, 6];
var dstDict = {
0: [0, 2, 4, 6],
1: [1, 3, 5]
};
assert.deepEqual(tr.b.group(srcArray, fn), dstDict);
});
test('mapItems', function() {
// Empty dictionary.
var srcDict = {};
var dstDict = tr.b.mapItems(srcDict, function(key, value) {
return value;
});
assert.lengthOf(Object.keys(srcDict), 0);
assert.lengthOf(Object.keys(dstDict), 0);
assert.notStrictEqual(dstDict, srcDict);
// Non-empty dictionary.
var srcDict = {a: 0, b: 30};
var dstDict = tr.b.mapItems(srcDict, function(key, value) {
return 9 * value / 5 + 32;
});
assert.lengthOf(Object.keys(srcDict), 2);
assert.equal(srcDict.a, 0);
assert.equal(srcDict.b, 30);
assert.lengthOf(Object.keys(dstDict), 2);
assert.equal(dstDict.a, 32);
assert.equal(dstDict.b, 86);
assert.notStrictEqual(dstDict, srcDict);
// Optional 'this' argument.
var srcDict = {c: '?', d: '!', e: '.'};
var dstDict = tr.b.mapItems(srcDict, function(key, value) {
return key + this.delimiter + value;
}, {delimiter: '='});
assert.lengthOf(Object.keys(srcDict), 3);
assert.equal(srcDict.c, '?');
assert.equal(srcDict.d, '!');
assert.equal(srcDict.e, '.');
assert.lengthOf(Object.keys(dstDict), 3);
assert.equal(dstDict.c, 'c=?');
assert.equal(dstDict.d, 'd=!');
assert.equal(dstDict.e, 'e=.');
assert.notStrictEqual(dstDict, srcDict);
// Inherited properties should not be mapped.
var srcDict = {__proto__: {a: 10}};
var dstDict = tr.b.mapItems(srcDict, function(key, value) {
return value;
});
assert.lengthOf(Object.keys(srcDict), 0);
assert.lengthOf(Object.keys(dstDict), 0);
});
test('filterItemsSimple', function() {
var someThisArg = {};
var srcDict = {a: 0, b: 30};
var dstDict = tr.b.filterItems(srcDict, function(key, value) {
assert.equal(this, someThisArg);
return value >= 30;
}, someThisArg);
assert.lengthOf(Object.keys(dstDict), 1);
assert.equal(dstDict.b, 30);
});
test('filterItemsInheritedProps', function() {
var srcDict = {
a: 0,
b: 30,
__proto__: {
c: 40
}
};
var dstDict = tr.b.filterItems(srcDict, function(key, value) {
return value >= 30;
});
assert.lengthOf(Object.keys(dstDict), 1);
assert.equal(dstDict.b, 30);
});
test('invertArrayOfDicts_defaultGetter', function() {
var array = [
{a: 6, b: 5},
undefined,
{a: 4, b: 3, c: 2},
{b: 1, c: 0}
];
var dict = tr.b.invertArrayOfDicts(array);
assert.sameMembers(Object.keys(dict), ['a', 'b', 'c']);
assert.deepEqual(tr.b.asArray(dict['a']), [6, undefined, 4, undefined]);
assert.deepEqual(tr.b.asArray(dict['b']), [5, undefined, 3, 1]);
assert.deepEqual(tr.b.asArray(dict['c']), [undefined, undefined, 2, 0]);
});
test('invertArrayOfDicts_customGetter', function() {
var fakeThis = { itemToDict: JSON.parse };
var array = [
'{"a": "test", "b": true}',
'{}',
'{invalid-json}',
'{"a": 42, "c": false}'
];
var dict = tr.b.invertArrayOfDicts(array, function(item) {
try {
return this.itemToDict(item);
} catch (e) {
return undefined;
}
}, fakeThis);
assert.sameMembers(Object.keys(dict), ['a', 'b', 'c']);
assert.deepEqual(
tr.b.asArray(dict['a']), ['test', undefined, undefined, 42]);
assert.deepEqual(
tr.b.asArray(dict['b']), [true, undefined, undefined, undefined]);
assert.deepEqual(
tr.b.asArray(dict['c']), [undefined, undefined, undefined, false]);
});
test('arrayToDict', function() {
var fakeThis = { prefix: 'key_' };
var array = [5, undefined, 'test'];
var dict = tr.b.arrayToDict(array, function(value) {
return this.prefix + value;
}, fakeThis);
assert.deepEqual(dict, {
'key_5': 5,
'key_undefined': undefined,
'key_test': 'test'
});
});
test('identity', function() {
// Undefined value.
assert.isUndefined(tr.b.identity(undefined));
// Primitive value.
assert.equal(tr.b.identity(-273.15), -273.15);
// List.
var list = ['list', 'with', 1, undefined, 'value'];
assert.strictEqual(tr.b.identity(list), list);
// Object.
var object = {'hasItems': true};
assert.strictEqual(tr.b.identity(object), object);
});
test('findFirstKeyInDictMatching', function() {
var dict = {a: 1, b: 2, c: 3};
var that = this;
var k = tr.b.findFirstKeyInDictMatching(dict, function(key, value) {
assert.equal(this, that);
return value == 2;
}, this);
assert.equal(k, 'b');
var k = tr.b.findFirstKeyInDictMatching(dict, function(key, value) {
assert.equal(this, that);
return false;
}, this);
assert.equal(k, undefined);
});
test('dictionaryContainsValue', function() {
var emptyDict = {};
assert.isFalse(tr.b.dictionaryContainsValue(emptyDict, 'missing'));
var nonEmptyDict = {a: 42, b: 'value'};
assert.isTrue(tr.b.dictionaryContainsValue(nonEmptyDict, 42));
assert.isTrue(tr.b.dictionaryContainsValue(nonEmptyDict, 'value'));
assert.isFalse(tr.b.dictionaryContainsValue(nonEmptyDict, 'a'));
assert.isFalse(tr.b.dictionaryContainsValue(nonEmptyDict, 'b'));
assert.isFalse(tr.b.dictionaryContainsValue(nonEmptyDict, 'missing'));
});
test('mapValues', function() {
var map = new Map();
map.set('a', 1);
map.set('b', 2);
map.set('c', 3);
var values = tr.b.mapValues(map);
assert.strictEqual(values.length, 3);
assert.sameMembers([1, 2, 3], values);
});
test('iterMapItems', function() {
var map = new Map();
map.set('a', 'aa');
map.set('b', 'bb');
map.set('c', 'cc');
var counter = 0;
var keyCheck = ['a', 'b', 'c'];
var valueCheck = ['aa', 'bb', 'cc'];
tr.b.iterMapItems(map, function(key, value) {
assert.strictEqual(key, keyCheck[counter]);
assert.strictEqual(value, valueCheck[counter]);
++counter;
});
assert.strictEqual(counter, 3);
// Optional 'this' argument.
var retObj = {delimiter: '=', result: {}};
assert.lengthOf(Object.keys(retObj.result), 0);
tr.b.iterMapItems(map, function(key, value) {
this.result[key] = key + this.delimiter + value;
}, retObj);
assert.lengthOf(Object.keys(retObj.result), 3);
assert.equal(retObj.result.a, 'a=aa');
assert.equal(retObj.result.b, 'b=bb');
assert.equal(retObj.result.c, 'c=cc');
});
});
</script>
|
