/deps/assert.ts | lume@v2.1.1

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x/lume/deps/assert.ts

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import * as lume from "https://deno.land/x/lume@v2.1.1/deps/assert.ts";

A library of assertion functions. If the assertion is false an AssertionError will be thrown which will result in pretty-printed diff of failing assertion.

This module is browser compatible, but do not rely on good formatting of values for AssertionError messages in browsers.

Classes

AssertionError

Error thrown when an assertion fails.

Functions

f assert	Make an assertion, error will be thrown if `expr` does not have truthy value.
f assertAlmostEquals	Make an assertion that `actual` and `expected` are almost equal numbers through a given tolerance. It can be used to take into account IEEE-754 double-precision floating-point representation limitations. If the values are not almost equal then throw.
f assertArrayIncludes	Make an assertion that `actual` includes the `expected` values. If not then an error will be thrown.
f assertEquals	Make an assertion that `actual` and `expected` are equal, deeply. If not deeply equal, then throw.
f assertExists	Make an assertion that actual is not null or undefined. If not then throw.
f assertFalse	Make an assertion, error will be thrown if `expr` have truthy value.
f assertGreater	Make an assertion that `actual` is greater than `expected`. If not then throw.
f assertGreaterOrEqual	Make an assertion that `actual` is greater than or equal to `expected`. If not then throw.
f assertInstanceOf	Make an assertion that `obj` is an instance of `type`. If not then throw.
f assertIsError	Make an assertion that `error` is an `Error`. If not then an error will be thrown. An error class and a string that should be included in the error message can also be asserted.
f assertLess	Make an assertion that `actual` is less than `expected`. If not then throw.
f assertLessOrEqual	Make an assertion that `actual` is less than or equal to `expected`. If not then throw.
f assertMatch	Make an assertion that `actual` match RegExp `expected`. If not then throw.
f assertNotEquals	Make an assertion that `actual` and `expected` are not equal, deeply. If not then throw.
f assertNotInstanceOf	Make an assertion that `obj` is not an instance of `type`. If so, then throw.
f assertNotMatch	Make an assertion that `actual` not match RegExp `expected`. If match then throw.
f assertNotStrictEquals	Make an assertion that `actual` and `expected` are not strictly equal. If the values are strictly equal then throw.
f assertObjectMatch	Make an assertion that `actual` object is a subset of `expected` object, deeply. If not, then throw.
f assertRejects	Executes a function which returns a promise, expecting it to reject.
f assertStrictEquals	Make an assertion that `actual` and `expected` are strictly equal. If not then throw.
f assertStringIncludes	Make an assertion that actual includes expected. If not then throw.
f assertThrows	Executes a function, expecting it to throw. If it does not, then it throws.
f equal	Deep equality comparison used in assertions
f fail	Forcefully throws a failed assertion.
f unimplemented	Use this to stub out methods that will throw when invoked.
f unreachable	Use this to assert unreachable code.

Type Aliases

T AnyConstructor	Any constructor
T ArrayLikeArg	An array-like object (`Array`, `Uint8Array`, `NodeList`, etc.) that is not a string
T Falsy	Assertion condition for `assertFalse`.
T GetConstructorType	Gets constructor type