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spec.js
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spec.js
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'use strict';
const {
ArrayPrototypeJoin,
ArrayPrototypePop,
ArrayPrototypePush,
ArrayPrototypeShift,
ArrayPrototypeUnshift,
hardenRegExp,
RegExpPrototypeSymbolSplit,
SafeMap,
StringPrototypeRepeat,
} = primordials;
const assert = require('assert');
const Transform = require('internal/streams/transform');
const { inspectWithNoCustomRetry } = require('internal/errors');
const { green, blue, red, white, gray } = require('internal/util/colors');
const { getCoverageReport } = require('internal/test_runner/utils');
const inspectOptions = { __proto__: null, colors: true, breakLength: Infinity };
const colors = {
'__proto__': null,
'test:fail': red,
'test:pass': green,
'test:diagnostic': blue,
};
const symbols = {
'__proto__': null,
'test:fail': '\u2716 ',
'test:pass': '\u2714 ',
'test:diagnostic': '\u2139 ',
'test:coverage': '\u2139 ',
'arrow:right': '\u25B6 ',
'hyphen:minus': '\uFE63 ',
};
class SpecReporter extends Transform {
#stack = [];
#reported = [];
#indentMemo = new SafeMap();
#failedTests = [];
constructor() {
super({ writableObjectMode: true });
}
#indent(nesting) {
let value = this.#indentMemo.get(nesting);
if (value === undefined) {
value = StringPrototypeRepeat(' ', nesting);
this.#indentMemo.set(nesting, value);
}
return value;
}
#formatError(error, indent) {
if (!error) return '';
const err = error.code === 'ERR_TEST_FAILURE' ? error.cause : error;
const message = ArrayPrototypeJoin(
RegExpPrototypeSymbolSplit(
hardenRegExp(/\r?\n/),
inspectWithNoCustomRetry(err, inspectOptions),
), `\n${indent} `);
return `\n${indent} ${message}\n`;
}
#formatTestReport(type, data, prefix = '', indent = '', hasChildren = false, skippedSubtest = false) {
let color = colors[type] ?? white;
let symbol = symbols[type] ?? ' ';
const duration_ms = data.details?.duration_ms ? ` ${gray}(${data.details.duration_ms}ms)${white}` : '';
const title = `${data.name}${duration_ms}${skippedSubtest ? ' # SKIP' : ''}`;
if (hasChildren) {
// If this test has had children - it was already reported, so slightly modify the output
return `${prefix}${indent}${color}${symbols['arrow:right']}${white}${title}\n`;
}
const error = this.#formatError(data.details?.error, indent);
if (skippedSubtest) {
color = gray;
symbol = symbols['hyphen:minus'];
}
return `${prefix}${indent}${color}${symbol}${title}${white}${error}`;
}
#handleTestReportEvent(type, data) {
const subtest = ArrayPrototypeShift(this.#stack); // This is the matching `test:start` event
if (subtest) {
assert(subtest.type === 'test:start');
assert(subtest.data.nesting === data.nesting);
assert(subtest.data.name === data.name);
}
let prefix = '';
while (this.#stack.length) {
// Report all the parent `test:start` events
const parent = ArrayPrototypePop(this.#stack);
assert(parent.type === 'test:start');
const msg = parent.data;
ArrayPrototypeUnshift(this.#reported, msg);
prefix += `${this.#indent(msg.nesting)}${symbols['arrow:right']}${msg.name}\n`;
}
let hasChildren = false;
if (this.#reported[0] && this.#reported[0].nesting === data.nesting && this.#reported[0].name === data.name) {
ArrayPrototypeShift(this.#reported);
hasChildren = true;
}
const skippedSubtest = subtest && data.skip && data.skip !== undefined;
const indent = this.#indent(data.nesting);
return `${this.#formatTestReport(type, data, prefix, indent, hasChildren, skippedSubtest)}\n`;
}
#handleEvent({ type, data }) {
switch (type) {
case 'test:fail':
ArrayPrototypePush(this.#failedTests, data);
return this.#handleTestReportEvent(type, data);
case 'test:pass':
return this.#handleTestReportEvent(type, data);
case 'test:start':
ArrayPrototypeUnshift(this.#stack, { __proto__: null, data, type });
break;
case 'test:diagnostic':
return `${colors[type]}${this.#indent(data.nesting)}${symbols[type]}${data.message}${white}\n`;
case 'test:coverage':
return getCoverageReport(this.#indent(data.nesting), data.summary, symbols['test:coverage'], blue);
}
}
_transform({ type, data }, encoding, callback) {
callback(null, this.#handleEvent({ type, data }));
}
_flush(callback) {
if (this.#failedTests.length === 0) {
callback(null, '');
return;
}
const results = [`\n${colors['test:fail']}${symbols['test:fail']}failing tests:${white}\n`];
for (let i = 0; i < this.#failedTests.length; i++) {
ArrayPrototypePush(results, this.#formatTestReport(
'test:fail',
this.#failedTests[i],
));
}
callback(null, ArrayPrototypeJoin(results, '\n'));
}
}
module.exports = SpecReporter;