test_runner: display failed test stack trace with dot reporter

lib/internal/test_runner/reporter/dot.js

@@ -1,18 +1,22 @@
 'use strict';
-
 const {
+  ArrayPrototypePush,
   MathMax,
 } = primordials;
+const colors = require('internal/util/colors');
+const { formatTestReport } = require('internal/test_runner/reporter/utils');
 
 module.exports = async function* dot(source) {
   let count = 0;
   let columns = getLineLength();
-  for await (const { type } of source) {
+  const failedTests = [];
+  for await (const { type, data } of source) {
     if (type === 'test:pass') {
       yield '.';
     }
     if (type === 'test:fail') {
       yield 'X';
+      ArrayPrototypePush(failedTests, data);
     }
     if ((type === 'test:fail' || type === 'test:pass') && ++count === columns) {
       yield '\n';
@@ -23,6 +27,12 @@ module.exports = async function* dot(source) {
     }
   }
   yield '\n';
+  if (failedTests.length > 0) {
+    yield `\n${colors.red}Failed tests:${colors.white}\n\n`;
+    for (const test of failedTests) {
+      yield formatTestReport('test:fail', test);
+    }
+  }
 };
 
 function getLineLength() {

lib/internal/test_runner/reporter/spec.js

@@ -1,97 +1,35 @@
 'use strict';
-
 const {
   ArrayPrototypeJoin,
   ArrayPrototypePop,
   ArrayPrototypePush,
   ArrayPrototypeShift,
   ArrayPrototypeUnshift,
-  RegExpPrototypeSymbolSplit,
-  SafeMap,
-  StringPrototypeRepeat,
-  hardenRegExp,
 } = primordials;
 const assert = require('assert');
 const Transform = require('internal/streams/transform');
-const { inspectWithNoCustomRetry } = require('internal/errors');
 const colors = require('internal/util/colors');
 const { kSubtestsFailed } = require('internal/test_runner/test');
 const { getCoverageReport } = require('internal/test_runner/utils');
 const { relative } = require('path');
+const {
+  formatTestReport,
+  indent,
+  reporterColorMap,
+  reporterUnicodeSymbolMap,
+} = require('internal/test_runner/reporter/utils');
 
-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 = [];
   #cwd = process.cwd();
-  #inspectOptions;
-  #colors;
 
   constructor() {
     super({ __proto__: null, writableObjectMode: true });
     colors.refresh();
-    this.#inspectOptions = { __proto__: null, colors: colors.shouldColorize(process.stdout), breakLength: Infinity };
-    this.#colors = {
-      '__proto__': null,
-      'test:fail': colors.red,
-      'test:pass': colors.green,
-      'test:diagnostic': colors.blue,
-    };
   }
 
-  #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, this.#inspectOptions),
-      ), `\n${indent}  `);
-    return `\n${indent}  ${message}\n`;
-  }
-  #formatTestReport(type, data, prefix = '', indent = '', hasChildren = false) {
-    let color = this.#colors[type] ?? colors.white;
-    let symbol = symbols[type] ?? ' ';
-    const { skip, todo } = data;
-    const duration_ms = data.details?.duration_ms ? ` ${colors.gray}(${data.details.duration_ms}ms)${colors.white}` : '';
-    let title = `${data.name}${duration_ms}`;
-
-    if (skip !== undefined) {
-      title += ` # ${typeof skip === 'string' && skip.length ? skip : 'SKIP'}`;
-    } else if (todo !== undefined) {
-      title += ` # ${typeof todo === 'string' && todo.length ? todo : 'TODO'}`;
-    }
-    const error = this.#formatError(data.details?.error, indent);
-    if (hasChildren) {
-      // If this test has had children - it was already reported, so slightly modify the output
-      const err = !error || data.details?.error?.failureType === 'subtestsFailed' ? '' : `\n${error}`;
-      return `${prefix}${indent}${color}${symbols['arrow:right']}${colors.white}${title}${err}`;
-    }
-    if (skip !== undefined) {
-      color = colors.gray;
-      symbol = symbols['hyphen:minus'];
-    }
-    return `${prefix}${indent}${color}${symbol}${title}${colors.white}${error}`;
-  }
   #handleTestReportEvent(type, data) {
     const subtest = ArrayPrototypeShift(this.#stack); // This is the matching `test:start` event
     if (subtest) {
@@ -106,15 +44,15 @@ class SpecReporter extends Transform {
       assert(parent.type === 'test:start');
       const msg = parent.data;
       ArrayPrototypeUnshift(this.#reported, msg);
-      prefix += `${this.#indent(msg.nesting)}${symbols['arrow:right']}${msg.name}\n`;
+      prefix += `${indent(msg.nesting)}${reporterUnicodeSymbolMap['arrow:right']}${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 indent = this.#indent(data.nesting);
-    return `${this.#formatTestReport(type, data, prefix, indent, hasChildren)}\n`;
+    const indentation = indent(data.nesting);
+    return `${formatTestReport(type, data, prefix, indentation, hasChildren)}\n`;
   }
   #handleEvent({ type, data }) {
     switch (type) {
@@ -132,9 +70,10 @@ class SpecReporter extends Transform {
       case 'test:stdout':
         return data.message;
       case 'test:diagnostic':
-        return `${this.#colors[type]}${this.#indent(data.nesting)}${symbols[type]}${data.message}${colors.white}\n`;
+        return `${reporterColorMap[type]}${indent(data.nesting)}${reporterUnicodeSymbolMap[type]}${data.message}${colors.white}\n`;
       case 'test:coverage':
-        return getCoverageReport(this.#indent(data.nesting), data.summary, symbols['test:coverage'], colors.blue, true);
+        return getCoverageReport(indent(data.nesting), data.summary,
+                                 reporterUnicodeSymbolMap['test:coverage'], colors.blue, true);
     }
   }
   _transform({ type, data }, encoding, callback) {
@@ -145,10 +84,10 @@ class SpecReporter extends Transform {
       callback(null, '');
       return;
     }
-    const results = [`\n${this.#colors['test:fail']}${symbols['test:fail']}failing tests:${colors.white}\n`];
+    const results = [`\n${reporterColorMap['test:fail']}${reporterUnicodeSymbolMap['test:fail']}failing tests:${colors.white}\n`];
     for (let i = 0; i < this.#failedTests.length; i++) {
       const test = this.#failedTests[i];
-      const formattedErr = this.#formatTestReport('test:fail', test);
+      const formattedErr = formatTestReport('test:fail', test);
 
       if (test.file) {
         const relPath = relative(this.#cwd, test.file);

lib/internal/test_runner/reporter/utils.js

@@ -0,0 +1,93 @@
+'use strict';
+const {
+  ArrayPrototypeJoin,
+  RegExpPrototypeSymbolSplit,
+  SafeMap,
+  StringPrototypeRepeat,
+  hardenRegExp,
+} = primordials;
+const colors = require('internal/util/colors');
+const { inspectWithNoCustomRetry } = require('internal/errors');
+const indentMemo = new SafeMap();
+
+const inspectOptions = {
+  __proto__: null,
+  colors: colors.shouldColorize(process.stdout),
+  breakLength: Infinity,
+};
+
+const reporterUnicodeSymbolMap = {
+  '__proto__': null,
+  'test:fail': '\u2716 ',
+  'test:pass': '\u2714 ',
+  'test:diagnostic': '\u2139 ',
+  'test:coverage': '\u2139 ',
+  'arrow:right': '\u25B6 ',
+  'hyphen:minus': '\uFE63 ',
+};
+
+const reporterColorMap = {
+  '__proto__': null,
+  get 'test:fail'() {
+    return colors.red;
+  },
+  get 'test:pass'() {
+    return colors.green;
+  },
+  get 'test:diagnostic'() {
+    return colors.blue;
+  },
+};
+
+function indent(nesting) {
+  let value = indentMemo.get(nesting);
+  if (value === undefined) {
+    value = StringPrototypeRepeat('  ', nesting);
+    indentMemo.set(nesting, value);
+  }
+  return value;
+}
+
+function 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`;
+}
+
+function formatTestReport(type, data, prefix = '', indent = '', hasChildren = false) {
+  let color = reporterColorMap[type] ?? colors.white;
+  let symbol = reporterUnicodeSymbolMap[type] ?? ' ';
+  const { skip, todo } = data;
+  const duration_ms = data.details?.duration_ms ? ` ${colors.gray}(${data.details.duration_ms}ms)${colors.white}` : '';
+  let title = `${data.name}${duration_ms}`;
+
+  if (skip !== undefined) {
+    title += ` # ${typeof skip === 'string' && skip.length ? skip : 'SKIP'}`;
+  } else if (todo !== undefined) {
+    title += ` # ${typeof todo === 'string' && todo.length ? todo : 'TODO'}`;
+  }
+  const error = formatError(data.details?.error, indent);
+  if (hasChildren) {
+    // If this test has had children - it was already reported, so slightly modify the output
+    const err = !error || data.details?.error?.failureType === 'subtestsFailed' ? '' : `\n${error}`;
+    return `${prefix}${indent}${color}${reporterUnicodeSymbolMap['arrow:right']}${colors.white}${title}${err}`;
+  }
+  if (skip !== undefined) {
+    color = colors.gray;
+    symbol = reporterUnicodeSymbolMap['hyphen:minus'];
+  }
+  return `${prefix}${indent}${color}${symbol}${title}${colors.white}${error}`;
+}
+
+module.exports = {
+  __proto__: null,
+  reporterUnicodeSymbolMap,
+  reporterColorMap,
+  formatTestReport,
+  indent,
+};