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de9f8d2db1
This commit adds a new function `assertNever` to the `assert` submodule. This function is particularly useful when we want to check whether we properly handle all the variants of a discriminated union. Ref: https://www.typescriptlang.org/docs/handbook/unions-and-intersections.html#union-exhaustiveness-checking --------- Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>
49 lines
1.5 KiB
TypeScript
49 lines
1.5 KiB
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// This module is browser compatible.
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/** A library of assertion functions.
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* If the assertion is false an `AssertionError` will be thrown which will
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* result in pretty-printed diff of failing assertion.
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*
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* This module is browser compatible, but do not rely on good formatting of
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* values for AssertionError messages in browsers.
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*
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* ```ts no-eval
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* import { assert } from "@std/assert";
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*
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* assert("I am truthy"); // Doesn't throw
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* assert(false); // Throws `AssertionError`
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* ```
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*
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* @module
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*/
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export * from "./almost_equals.ts";
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export * from "./array_includes.ts";
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export * from "./equals.ts";
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export * from "./exists.ts";
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export * from "./false.ts";
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export * from "./greater_or_equal.ts";
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export * from "./greater.ts";
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export * from "./instance_of.ts";
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export * from "./is_error.ts";
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export * from "./less_or_equal.ts";
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export * from "./less.ts";
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export * from "./match.ts";
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export * from "./never.ts";
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export * from "./not_equals.ts";
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export * from "./not_instance_of.ts";
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export * from "./not_match.ts";
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export * from "./not_strict_equals.ts";
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export * from "./object_match.ts";
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export * from "./rejects.ts";
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export * from "./strict_equals.ts";
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export * from "./string_includes.ts";
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export * from "./throws.ts";
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export * from "./assert.ts";
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export * from "./assertion_error.ts";
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export * from "./equal.ts";
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export * from "./fail.ts";
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export * from "./unimplemented.ts";
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export * from "./unreachable.ts";
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