Press n or j to go to the next uncovered block, b, p or k for the previous block.
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const {
ArrayPrototypeForEach,
ArrayPrototypeJoin,
ArrayPrototypeMap,
ArrayPrototypePush,
ArrayPrototypeShift,
ObjectEntries,
StringPrototypeReplaceAll,
StringPrototypeSplit,
RegExpPrototypeSymbolReplace,
} = primordials;
const { inspectWithNoCustomRetry } = require('internal/errors');
const Readable = require('internal/streams/readable');
const { isError, kEmptyObject } = require('internal/util');
const kFrameStartRegExp = /^ {4}at /;
const kLineBreakRegExp = /\n|\r\n/;
const inspectOptions = { colors: false, breakLength: Infinity };
let testModule; // Lazy loaded due to circular dependency.
function lazyLoadTest() {
testModule ??= require('internal/test_runner/test');
return testModule;
}
class TapStream extends Readable {
#buffer;
#canPush;
constructor() {
super();
this.#buffer = [];
this.#canPush = true;
}
_read() {
this.#canPush = true;
while (this.#buffer.length > 0) {
const line = ArrayPrototypeShift(this.#buffer);
if (!this.#tryPush(line)) {
return;
}
}
}
bail(message) {
this.#tryPush(`Bail out!${message ? ` ${tapEscape(message)}` : ''}\n`);
}
fail(indent, testNumber, name, duration, error, directive) {
this.emit('test:fail', { __proto__: null, name, testNumber, duration, ...directive, error });
this.#test(indent, testNumber, 'not ok', name, directive);
this.#details(indent, duration, error);
}
ok(indent, testNumber, name, duration, directive) {
this.emit('test:pass', { __proto__: null, name, testNumber, duration, ...directive });
this.#test(indent, testNumber, 'ok', name, directive);
this.#details(indent, duration, null);
}
plan(indent, count, explanation) {
const exp = `${explanation ? ` # ${tapEscape(explanation)}` : ''}`;
this.#tryPush(`${indent}1..${count}${exp}\n`);
}
getSkip(reason) {
return { __proto__: null, skip: reason };
}
getTodo(reason) {
return { __proto__: null, todo: reason };
}
subtest(indent, name) {
this.#tryPush(`${indent}# Subtest: ${tapEscape(name)}\n`);
}
#details(indent, duration, error) {
let details = `${indent} ---\n`;
details += jsToYaml(indent, 'duration_ms', duration);
details += jsToYaml(indent, null, error);
details += `${indent} ...\n`;
this.#tryPush(details);
}
diagnostic(indent, message) {
this.emit('test:diagnostic', message);
this.#tryPush(`${indent}# ${tapEscape(message)}\n`);
}
version() {
this.#tryPush('TAP version 13\n');
}
#test(indent, testNumber, status, name, directive = kEmptyObject) {
let line = `${indent}${status} ${testNumber}`;
if (name) {
line += ` ${tapEscape(`- ${name}`)}`;
}
line += ArrayPrototypeJoin(ArrayPrototypeMap(ObjectEntries(directive), ({ 0: key, 1: value }) => (
` # ${key.toUpperCase()}${value ? ` ${tapEscape(value)}` : ''}`
)), '');
line += '\n';
this.#tryPush(line);
}
#tryPush(message) {
if (this.#canPush) {
this.#canPush = this.push(message);
} else {
ArrayPrototypePush(this.#buffer, message);
}
return this.#canPush;
}
}
// In certain places, # and \ need to be escaped as \# and \\.
function tapEscape(input) {
return StringPrototypeReplaceAll(
StringPrototypeReplaceAll(input, '\\', '\\\\'), '#', '\\#'
);
}
function jsToYaml(indent, name, value) {
if (value === null || value === undefined) {
return '';
}
if (typeof value !== 'object') {
const prefix = `${indent} ${name}: `;
if (typeof value !== 'string') {
return `${prefix}${inspectWithNoCustomRetry(value, inspectOptions)}\n`;
}
const lines = StringPrototypeSplit(value, kLineBreakRegExp);
if (lines.length === 1) {
return `${prefix}${inspectWithNoCustomRetry(value, inspectOptions)}\n`;
}
let str = `${prefix}|-\n`;
for (let i = 0; i < lines.length; i++) {
str += `${indent} ${lines[i]}\n`;
}
return str;
}
const entries = ObjectEntries(value);
const isErrorObj = isError(value);
let result = '';
for (let i = 0; i < entries.length; i++) {
const { 0: key, 1: value } = entries[i];
if (isErrorObj && (key === 'cause' || key === 'code')) {
continue;
}
result += jsToYaml(indent, key, value);
}
if (isErrorObj) {
const { kTestCodeFailure, kUnwrapErrors } = lazyLoadTest();
const {
cause,
code,
failureType,
message,
stack,
} = value;
let errMsg = message ?? '<unknown error>';
let errStack = stack;
let errCode = code;
// If the ERR_TEST_FAILURE came from an error provided by user code,
// then try to unwrap the original error message and stack.
if (code === 'ERR_TEST_FAILURE' && kUnwrapErrors.has(failureType)) {
errStack = cause?.stack ?? errStack;
errCode = cause?.code ?? errCode;
if (failureType === kTestCodeFailure) {
errMsg = cause?.message ?? errMsg;
}
}
result += jsToYaml(indent, 'error', errMsg);
if (errCode) {
result += jsToYaml(indent, 'code', errCode);
}
if (typeof errStack === 'string') {
const frames = [];
ArrayPrototypeForEach(
StringPrototypeSplit(errStack, kLineBreakRegExp),
(frame) => {
const processed = RegExpPrototypeSymbolReplace(
kFrameStartRegExp, frame, ''
);
if (processed.length > 0 && processed.length !== frame.length) {
ArrayPrototypePush(frames, processed);
}
}
);
if (frames.length > 0) {
const frameDelimiter = `\n${indent} `;
result += `${indent} stack: |-${frameDelimiter}`;
result += `${ArrayPrototypeJoin(frames, `${frameDelimiter}`)}\n`;
}
}
}
return result;
}
module.exports = { TapStream };
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