mirror of
https://github.com/denoland/deno.git
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576 lines
19 KiB
TypeScript
576 lines
19 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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// Adapted from Node.js. Copyright Joyent, Inc. and other Node contributors.
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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// TODO(schwarzkopfb): change this when `Deno.consoleSize()` will be stable
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interface DenoUnstable {
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consoleSize?(rid: number): { columns: number };
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}
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function getConsoleWidth(): number {
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return (Deno as DenoUnstable).consoleSize?.(Deno.stderr.rid).columns ?? 80;
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}
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import { inspect } from "./util.ts";
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import { stripColor as removeColors } from "../fmt/colors.ts";
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// TODO(schwarzkopfb): we should implement Node's concept of "primordials"
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// Ref: https://github.com/denoland/deno/issues/6040#issuecomment-637305828
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const MathMax = Math.max;
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const { Error } = globalThis;
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const {
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create: ObjectCreate,
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defineProperty: ObjectDefineProperty,
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getPrototypeOf: ObjectGetPrototypeOf,
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getOwnPropertyDescriptor: ObjectGetOwnPropertyDescriptor,
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keys: ObjectKeys,
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} = Object;
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import { ERR_INVALID_ARG_TYPE } from "./_errors.ts";
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let blue = "";
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let green = "";
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let red = "";
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let defaultColor = "";
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const kReadableOperator: { [key: string]: string } = {
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deepStrictEqual: "Expected values to be strictly deep-equal:",
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strictEqual: "Expected values to be strictly equal:",
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strictEqualObject: 'Expected "actual" to be reference-equal to "expected":',
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deepEqual: "Expected values to be loosely deep-equal:",
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notDeepStrictEqual: 'Expected "actual" not to be strictly deep-equal to:',
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notStrictEqual: 'Expected "actual" to be strictly unequal to:',
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notStrictEqualObject:
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'Expected "actual" not to be reference-equal to "expected":',
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notDeepEqual: 'Expected "actual" not to be loosely deep-equal to:',
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notIdentical: "Values have same structure but are not reference-equal:",
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notDeepEqualUnequal: "Expected values not to be loosely deep-equal:",
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};
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// Comparing short primitives should just show === / !== instead of using the
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// diff.
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const kMaxShortLength = 12;
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export function copyError(source: Error): Error {
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const keys = ObjectKeys(source);
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const target = ObjectCreate(ObjectGetPrototypeOf(source));
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for (const key of keys) {
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const desc = ObjectGetOwnPropertyDescriptor(source, key);
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if (desc !== undefined) {
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ObjectDefineProperty(target, key, desc);
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}
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}
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ObjectDefineProperty(target, "message", { value: source.message });
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return target;
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}
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export function inspectValue(val: unknown): string {
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// The util.inspect default values could be changed. This makes sure the
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// error messages contain the necessary information nevertheless.
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return inspect(
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val,
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{
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compact: false,
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customInspect: false,
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depth: 1000,
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maxArrayLength: Infinity,
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// Assert compares only enumerable properties (with a few exceptions).
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showHidden: false,
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// Assert does not detect proxies currently.
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showProxy: false,
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sorted: true,
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// Inspect getters as we also check them when comparing entries.
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getters: true,
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},
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);
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}
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export function createErrDiff(
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actual: unknown,
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expected: unknown,
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operator: string,
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): string {
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let other = "";
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let res = "";
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let end = "";
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let skipped = false;
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const actualInspected = inspectValue(actual);
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const actualLines = actualInspected.split("\n");
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const expectedLines = inspectValue(expected).split("\n");
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let i = 0;
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let indicator = "";
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// In case both values are objects or functions explicitly mark them as not
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// reference equal for the `strictEqual` operator.
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if (
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operator === "strictEqual" &&
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((typeof actual === "object" && actual !== null &&
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typeof expected === "object" && expected !== null) ||
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(typeof actual === "function" && typeof expected === "function"))
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) {
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operator = "strictEqualObject";
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}
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// If "actual" and "expected" fit on a single line and they are not strictly
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// equal, check further special handling.
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if (
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actualLines.length === 1 && expectedLines.length === 1 &&
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actualLines[0] !== expectedLines[0]
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) {
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// Check for the visible length using the `removeColors()` function, if
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// appropriate.
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const c = inspect.defaultOptions.colors;
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const actualRaw = c ? removeColors(actualLines[0]) : actualLines[0];
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const expectedRaw = c ? removeColors(expectedLines[0]) : expectedLines[0];
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const inputLength = actualRaw.length + expectedRaw.length;
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// If the character length of "actual" and "expected" together is less than
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// kMaxShortLength and if neither is an object and at least one of them is
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// not `zero`, use the strict equal comparison to visualize the output.
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if (inputLength <= kMaxShortLength) {
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if (
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(typeof actual !== "object" || actual === null) &&
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(typeof expected !== "object" || expected === null) &&
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(actual !== 0 || expected !== 0)
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) { // -0 === +0
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return `${kReadableOperator[operator]}\n\n` +
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`${actualLines[0]} !== ${expectedLines[0]}\n`;
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}
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} else if (operator !== "strictEqualObject") {
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// If the stderr is a tty and the input length is lower than the current
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// columns per line, add a mismatch indicator below the output. If it is
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// not a tty, use a default value of 80 characters.
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const maxLength = Deno.isatty(Deno.stderr.rid) ? getConsoleWidth() : 80;
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if (inputLength < maxLength) {
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while (actualRaw[i] === expectedRaw[i]) {
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i++;
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}
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// Ignore the first characters.
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if (i > 2) {
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// Add position indicator for the first mismatch in case it is a
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// single line and the input length is less than the column length.
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indicator = `\n ${" ".repeat(i)}^`;
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i = 0;
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}
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}
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}
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}
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// Remove all ending lines that match (this optimizes the output for
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// readability by reducing the number of total changed lines).
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let a = actualLines[actualLines.length - 1];
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let b = expectedLines[expectedLines.length - 1];
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while (a === b) {
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if (i++ < 3) {
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end = `\n ${a}${end}`;
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} else {
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other = a;
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}
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actualLines.pop();
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expectedLines.pop();
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if (actualLines.length === 0 || expectedLines.length === 0) {
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break;
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}
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a = actualLines[actualLines.length - 1];
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b = expectedLines[expectedLines.length - 1];
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}
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const maxLines = MathMax(actualLines.length, expectedLines.length);
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// Strict equal with identical objects that are not identical by reference.
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// E.g., assert.deepStrictEqual({ a: Symbol() }, { a: Symbol() })
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if (maxLines === 0) {
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// We have to get the result again. The lines were all removed before.
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const actualLines = actualInspected.split("\n");
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// Only remove lines in case it makes sense to collapse those.
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if (actualLines.length > 50) {
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actualLines[46] = `${blue}...${defaultColor}`;
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while (actualLines.length > 47) {
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actualLines.pop();
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}
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}
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return `${kReadableOperator.notIdentical}\n\n${actualLines.join("\n")}\n`;
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}
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// There were at least five identical lines at the end. Mark a couple of
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// skipped.
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if (i >= 5) {
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end = `\n${blue}...${defaultColor}${end}`;
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skipped = true;
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}
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if (other !== "") {
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end = `\n ${other}${end}`;
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other = "";
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}
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let printedLines = 0;
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let identical = 0;
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const msg = kReadableOperator[operator] +
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`\n${green}+ actual${defaultColor} ${red}- expected${defaultColor}`;
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const skippedMsg = ` ${blue}...${defaultColor} Lines skipped`;
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let lines = actualLines;
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let plusMinus = `${green}+${defaultColor}`;
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let maxLength = expectedLines.length;
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if (actualLines.length < maxLines) {
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lines = expectedLines;
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plusMinus = `${red}-${defaultColor}`;
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maxLength = actualLines.length;
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}
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for (i = 0; i < maxLines; i++) {
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if (maxLength < i + 1) {
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// If more than two former lines are identical, print them. Collapse them
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// in case more than five lines were identical.
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if (identical > 2) {
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if (identical > 3) {
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if (identical > 4) {
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if (identical === 5) {
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res += `\n ${lines[i - 3]}`;
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printedLines++;
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} else {
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res += `\n${blue}...${defaultColor}`;
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skipped = true;
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}
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}
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res += `\n ${lines[i - 2]}`;
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printedLines++;
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}
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res += `\n ${lines[i - 1]}`;
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printedLines++;
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}
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// No identical lines before.
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identical = 0;
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// Add the expected line to the cache.
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if (lines === actualLines) {
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res += `\n${plusMinus} ${lines[i]}`;
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} else {
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other += `\n${plusMinus} ${lines[i]}`;
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}
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printedLines++;
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// Only extra actual lines exist
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// Lines diverge
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} else {
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const expectedLine = expectedLines[i];
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let actualLine = actualLines[i];
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// If the lines diverge, specifically check for lines that only diverge by
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// a trailing comma. In that case it is actually identical and we should
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// mark it as such.
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let divergingLines = actualLine !== expectedLine &&
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(!actualLine.endsWith(",") ||
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actualLine.slice(0, -1) !== expectedLine);
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// If the expected line has a trailing comma but is otherwise identical,
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// add a comma at the end of the actual line. Otherwise the output could
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// look weird as in:
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//
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// [
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// 1 // No comma at the end!
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// + 2
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// ]
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//
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if (
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divergingLines &&
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expectedLine.endsWith(",") &&
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expectedLine.slice(0, -1) === actualLine
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) {
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divergingLines = false;
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actualLine += ",";
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}
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if (divergingLines) {
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// If more than two former lines are identical, print them. Collapse
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// them in case more than five lines were identical.
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if (identical > 2) {
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if (identical > 3) {
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if (identical > 4) {
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if (identical === 5) {
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res += `\n ${actualLines[i - 3]}`;
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printedLines++;
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} else {
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res += `\n${blue}...${defaultColor}`;
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skipped = true;
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}
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}
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res += `\n ${actualLines[i - 2]}`;
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printedLines++;
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}
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res += `\n ${actualLines[i - 1]}`;
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printedLines++;
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}
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// No identical lines before.
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identical = 0;
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// Add the actual line to the result and cache the expected diverging
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// line so consecutive diverging lines show up as +++--- and not +-+-+-.
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res += `\n${green}+${defaultColor} ${actualLine}`;
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other += `\n${red}-${defaultColor} ${expectedLine}`;
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printedLines += 2;
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// Lines are identical
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} else {
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// Add all cached information to the result before adding other things
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// and reset the cache.
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res += other;
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other = "";
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identical++;
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// The very first identical line since the last diverging line is be
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// added to the result.
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if (identical <= 2) {
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res += `\n ${actualLine}`;
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printedLines++;
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}
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}
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}
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// Inspected object to big (Show ~50 rows max)
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if (printedLines > 50 && i < maxLines - 2) {
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return `${msg}${skippedMsg}\n${res}\n${blue}...${defaultColor}${other}\n` +
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`${blue}...${defaultColor}`;
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}
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}
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return `${msg}${skipped ? skippedMsg : ""}\n${res}${other}${end}${indicator}`;
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}
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export interface AssertionErrorDetailsDescriptor {
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message: string;
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actual: unknown;
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expected: unknown;
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operator: string;
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stack: Error;
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}
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export interface AssertionErrorConstructorOptions {
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message?: string;
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actual?: unknown;
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expected?: unknown;
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operator?: string;
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details?: AssertionErrorDetailsDescriptor[];
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// deno-lint-ignore ban-types
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stackStartFn?: Function;
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// Compatibility with older versions.
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// deno-lint-ignore ban-types
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stackStartFunction?: Function;
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}
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interface ErrorWithStackTraceLimit extends ErrorConstructor {
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stackTraceLimit: number;
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}
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export class AssertionError extends Error {
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[key: string]: unknown
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// deno-lint-ignore constructor-super
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constructor(options: AssertionErrorConstructorOptions) {
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if (typeof options !== "object" || options === null) {
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throw new ERR_INVALID_ARG_TYPE("options", "Object", options);
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}
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const {
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message,
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operator,
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stackStartFn,
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details,
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// Compatibility with older versions.
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stackStartFunction,
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} = options;
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let {
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actual,
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expected,
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} = options;
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// TODO(schwarzkopfb): `stackTraceLimit` should be added to `ErrorConstructor` in
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// cli/dts/lib.deno.shared_globals.d.ts
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const limit = (Error as ErrorWithStackTraceLimit).stackTraceLimit;
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(Error as ErrorWithStackTraceLimit).stackTraceLimit = 0;
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if (message != null) {
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super(String(message));
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} else {
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if (Deno.isatty(Deno.stderr.rid)) {
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// Reset on each call to make sure we handle dynamically set environment
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// variables correct.
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if (Deno.noColor) {
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blue = "";
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green = "";
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defaultColor = "";
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red = "";
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} else {
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blue = "\u001b[34m";
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green = "\u001b[32m";
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defaultColor = "\u001b[39m";
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red = "\u001b[31m";
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}
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}
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// Prevent the error stack from being visible by duplicating the error
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// in a very close way to the original in case both sides are actually
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// instances of Error.
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if (
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typeof actual === "object" && actual !== null &&
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typeof expected === "object" && expected !== null &&
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"stack" in actual && actual instanceof Error &&
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"stack" in expected && expected instanceof Error
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) {
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actual = copyError(actual);
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expected = copyError(expected);
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}
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if (operator === "deepStrictEqual" || operator === "strictEqual") {
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super(createErrDiff(actual, expected, operator));
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} else if (
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operator === "notDeepStrictEqual" ||
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operator === "notStrictEqual"
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) {
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// In case the objects are equal but the operator requires unequal, show
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// the first object and say A equals B
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let base = kReadableOperator[operator];
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const res = inspectValue(actual).split("\n");
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// In case "actual" is an object or a function, it should not be
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// reference equal.
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if (
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operator === "notStrictEqual" &&
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((typeof actual === "object" && actual !== null) ||
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typeof actual === "function")
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) {
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base = kReadableOperator.notStrictEqualObject;
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}
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// Only remove lines in case it makes sense to collapse those.
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if (res.length > 50) {
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res[46] = `${blue}...${defaultColor}`;
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while (res.length > 47) {
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res.pop();
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}
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}
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// Only print a single input.
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if (res.length === 1) {
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super(`${base}${res[0].length > 5 ? "\n\n" : " "}${res[0]}`);
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} else {
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super(`${base}\n\n${res.join("\n")}\n`);
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}
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} else {
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let res = inspectValue(actual);
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let other = inspectValue(expected);
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const knownOperator = kReadableOperator[operator ?? ""];
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if (operator === "notDeepEqual" && res === other) {
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res = `${knownOperator}\n\n${res}`;
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if (res.length > 1024) {
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res = `${res.slice(0, 1021)}...`;
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}
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super(res);
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} else {
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if (res.length > 512) {
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res = `${res.slice(0, 509)}...`;
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}
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if (other.length > 512) {
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other = `${other.slice(0, 509)}...`;
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}
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if (operator === "deepEqual") {
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res = `${knownOperator}\n\n${res}\n\nshould loosely deep-equal\n\n`;
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} else {
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const newOp = kReadableOperator[`${operator}Unequal`];
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if (newOp) {
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res = `${newOp}\n\n${res}\n\nshould not loosely deep-equal\n\n`;
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} else {
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other = ` ${operator} ${other}`;
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}
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}
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super(`${res}${other}`);
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}
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}
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}
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(Error as ErrorWithStackTraceLimit).stackTraceLimit = limit;
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this.generatedMessage = !message;
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ObjectDefineProperty(this, "name", {
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value: "AssertionError [ERR_ASSERTION]",
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enumerable: false,
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writable: true,
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configurable: true,
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});
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this.code = "ERR_ASSERTION";
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if (details) {
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this.actual = undefined;
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this.expected = undefined;
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this.operator = undefined;
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for (let i = 0; i < details.length; i++) {
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|
this["message " + i] = details[i].message;
|
|
this["actual " + i] = details[i].actual;
|
|
this["expected " + i] = details[i].expected;
|
|
this["operator " + i] = details[i].operator;
|
|
this["stack trace " + i] = details[i].stack;
|
|
}
|
|
} else {
|
|
this.actual = actual;
|
|
this.expected = expected;
|
|
this.operator = operator;
|
|
}
|
|
|
|
Error.captureStackTrace(this, stackStartFn || stackStartFunction);
|
|
// Create error message including the error code in the name.
|
|
this.stack;
|
|
// Reset the name.
|
|
this.name = "AssertionError";
|
|
}
|
|
|
|
toString() {
|
|
return `${this.name} [${this.code}]: ${this.message}`;
|
|
}
|
|
|
|
[inspect.custom](recurseTimes: number, ctx: Record<string, unknown>) {
|
|
// Long strings should not be fully inspected.
|
|
const tmpActual = this.actual;
|
|
const tmpExpected = this.expected;
|
|
|
|
for (const name of ["actual", "expected"]) {
|
|
if (typeof this[name] === "string") {
|
|
const value = (this[name] as string);
|
|
const lines = value.split("\n");
|
|
if (lines.length > 10) {
|
|
lines.length = 10;
|
|
this[name] = `${lines.join("\n")}\n...`;
|
|
} else if (value.length > 512) {
|
|
this[name] = `${value.slice(512)}...`;
|
|
}
|
|
}
|
|
}
|
|
|
|
// This limits the `actual` and `expected` property default inspection to
|
|
// the minimum depth. Otherwise those values would be too verbose compared
|
|
// to the actual error message which contains a combined view of these two
|
|
// input values.
|
|
const result = inspect(this, {
|
|
...ctx,
|
|
customInspect: false,
|
|
depth: 0,
|
|
});
|
|
|
|
// Reset the properties after inspection.
|
|
this.actual = tmpActual;
|
|
this.expected = tmpExpected;
|
|
|
|
return result;
|
|
}
|
|
}
|
|
|
|
export default AssertionError;
|