40 lines
1.3 KiB
TypeScript
40 lines
1.3 KiB
TypeScript
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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function stringify(value: any) {
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return typeof value === 'string' ? `"${value}"` : '' + value;
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}
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export function assertNumber(actual: any, condition: string) {
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(typeof actual != 'number') && assertThrow(actual, 'number', condition, 'typeof ==');
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}
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export function assertEqual<T>(
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actual: T, expected: T, condition: string, serializer?: ((v: T) => string)) {
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(actual != expected) && assertThrow(actual, expected, condition, '==', serializer);
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}
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export function assertLessThan<T>(actual: T, expected: T, condition: string) {
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(actual < expected) && assertThrow(actual, expected, condition, '>');
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}
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export function assertNotNull<T>(actual: T, condition: string) {
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assertNotEqual(actual, null, condition);
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}
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export function assertNotEqual<T>(actual: T, expected: T, condition: string) {
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(actual == expected) && assertThrow(actual, expected, condition, '!=');
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}
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export function assertThrow<T>(
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actual: T, expected: T, condition: string, operator: string,
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serializer: ((v: T) => string) = stringify) {
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throw new Error(
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`ASSERT: expected ${condition} ${operator} ${serializer(expected)} but was ${serializer(actual)}!`);
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}
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