195 lines
7.8 KiB
JavaScript
195 lines
7.8 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var tslib_1 = require("tslib");
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var memoize_1 = require("./memoize");
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describe('memoizeFunction', function () {
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it('can return a cached result with a no args function', function () {
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var _timesCalled = 0;
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var memoizeFunctiondTimesCalled = (0, memoize_1.memoizeFunction)(function () { return ++_timesCalled; });
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expect(memoizeFunctiondTimesCalled()).toEqual(1);
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expect(memoizeFunctiondTimesCalled()).toEqual(1);
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});
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it('can return a cached result with a 2 arg function', function () {
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var _timesCalled = 0;
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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var combine = (0, memoize_1.memoizeFunction)(function (obj1, obj2) { return obj1.val + obj2.val + ++_timesCalled; });
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var objA = { val: 'a' };
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var objB = { val: 'b' };
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expect(combine(objA, objA)).toEqual('aa1');
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expect(combine(objA, objA)).toEqual('aa1');
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expect(combine(objA, objB)).toEqual('ab2');
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expect(combine(objA, objB)).toEqual('ab2');
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expect(combine(objB, objA)).toEqual('ba3');
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expect(combine(objB, objA)).toEqual('ba3');
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});
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it('do not use a cached result if the function is different', function () {
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var _timesCalled = 0;
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var test = (0, memoize_1.memoizeFunction)(function (fn) {
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fn();
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return ++_timesCalled;
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});
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function createFunctionArg() {
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return function () { return 'test'; };
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}
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var fnA = createFunctionArg();
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var fnB = createFunctionArg();
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expect(test(fnA)).toEqual(1);
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expect(test(fnA)).toEqual(1);
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expect(test(fnB)).toEqual(2);
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expect(test(fnA)).toEqual(1);
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expect(test(fnB)).toEqual(2);
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expect(test(fnB)).toEqual(2);
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});
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it('can return a cached result with falsy args', function () {
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var _timesCalled = 0;
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var combine = (0, memoize_1.memoizeFunction)(
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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function (obj1, obj2) { return (obj1 ? obj1.val : '') + (obj2 ? obj2.val : '') + ++_timesCalled; });
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var objA = { val: 'a' };
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var objB = { val: 'b' };
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expect(combine(objA, objA)).toEqual('aa1');
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expect(combine(objA, undefined)).toEqual('a2');
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expect(combine(null, objB)).toEqual('b3');
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expect(combine(false, 0)).toEqual('4');
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});
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it('works if you pass less arguments on subsequent calls', function () {
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var count = 0;
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var func = (0, memoize_1.memoizeFunction)(function (a, b) {
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if (a === void 0) { a = ''; }
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if (b === void 0) { b = ''; }
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return a + b + count++;
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});
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expect(func('hi', 'world')).toEqual('hiworld0');
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expect(func('hi', 'world')).toEqual('hiworld0');
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expect(func('hi')).toEqual('hi1');
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expect(func('hi')).toEqual('hi1');
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expect(func()).toEqual('2');
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expect(func()).toEqual('2');
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});
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it('works if you pass more arguments on subsequent calls', function () {
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var count = 0;
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var func = (0, memoize_1.memoizeFunction)(function (a, b) {
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if (a === void 0) { a = ''; }
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if (b === void 0) { b = ''; }
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return a + b + count++;
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});
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expect(func()).toEqual('0');
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expect(func()).toEqual('0');
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expect(func('hi')).toEqual('hi1');
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expect(func('hi')).toEqual('hi1');
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expect(func('hi', 'world')).toEqual('hiworld2');
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expect(func('hi', 'world')).toEqual('hiworld2');
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});
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it('resets after resetCount limit is reached.', function () {
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var count = 0;
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var func = (0, memoize_1.memoizeFunction)(function (a) { return a + count++; }, 1);
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expect(func('a')).toEqual('a0');
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expect(func('a')).toEqual('a0');
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expect(func('b')).toEqual('b1');
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expect(func('b')).toEqual('b2');
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expect(func('b')).toEqual('b2');
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expect(func('a')).toEqual('a3');
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expect(func('a')).toEqual('a4');
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expect(func('a')).toEqual('a4');
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});
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it('updates the cache if the cached value is null', function () {
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var returnNull = true;
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var callback = function () {
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if (returnNull) {
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return null;
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}
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return 1;
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};
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var func = (0, memoize_1.memoizeFunction)(function () { return callback(); }, undefined, true /*ignoreNullOrUndefinedResult */);
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expect(func()).toEqual(null);
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returnNull = false;
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expect(func()).toEqual(1);
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});
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it('updates the cache if the cached value is undefined', function () {
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var returnUndefined = true;
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var callback = function () {
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if (returnUndefined) {
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return undefined;
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}
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return 1;
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};
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var func = (0, memoize_1.memoizeFunction)(function () { return callback(); }, undefined, true /*ignoreNullOrUndefinedResult */);
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expect(func()).toEqual(undefined);
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returnUndefined = false;
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expect(func()).toEqual(1);
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});
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it('caches and preserves if the falsey value returned by the callback method is 0', function () {
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var returnZero = true;
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var callback = function () {
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if (returnZero) {
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return 0;
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}
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return 1;
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};
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var func = (0, memoize_1.memoizeFunction)(function () { return callback(); }, undefined, true /*ignoreNullOrUndefinedResult */);
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expect(func()).toEqual(0);
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returnZero = false;
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expect(func()).toEqual(0);
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});
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it('caches and preserves if the falsey value returned by the callback method is NaN', function () {
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var returnNaN = true;
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var callback = function () {
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if (returnNaN) {
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return NaN;
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}
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return 1;
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};
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var func = (0, memoize_1.memoizeFunction)(function () { return callback(); }, undefined, true /*ignoreNullOrUndefinedResult */);
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expect(func()).toEqual(NaN);
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returnNaN = false;
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expect(func()).toEqual(NaN);
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});
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it('caches and preserves if the falsey value returned by the callback method is false', function () {
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var returnFalse = true;
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var callback = function () {
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if (returnFalse) {
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return false;
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}
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return 1;
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};
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var func = (0, memoize_1.memoizeFunction)(function () { return callback(); }, undefined, true /*ignoreNullOrUndefinedResult */);
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expect(func()).toEqual(false);
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returnFalse = false;
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expect(func()).toEqual(false);
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});
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it('caches and preserves if the falsey value returned by the callback method is empty string', function () {
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var returnEmptyString = true;
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var callback = function () {
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if (returnEmptyString) {
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return '';
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}
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return 1;
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};
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var func = (0, memoize_1.memoizeFunction)(function () { return callback(); }, undefined, true /*ignoreNullOrUndefinedResult */);
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expect(func()).toEqual('');
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returnEmptyString = false;
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expect(func()).toEqual('');
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});
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});
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describe('memoize', function () {
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it('can work on multiple instances of a class', function () {
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var _count = 0;
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var Foo = /** @class */ (function () {
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function Foo() {
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}
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Foo.prototype.bar = function (val) {
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return val + _count++;
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};
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tslib_1.__decorate([
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memoize_1.memoize
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], Foo.prototype, "bar", null);
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return Foo;
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}());
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var f = new Foo();
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expect(f.bar('hi')).toEqual('hi0');
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expect(f.bar('hi')).toEqual('hi0');
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expect(f.bar('bye')).toEqual('bye1');
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expect(f.bar('bye')).toEqual('bye1');
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});
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});
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//# sourceMappingURL=memoize.test.js.map
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