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lts/lib/internal/process/promises.js

Summary

Maintainability
F
4 days
Test Coverage

Function processPromiseRejections has a Cognitive Complexity of 22 (exceeds 5 allowed). Consider refactoring.
Open

function processPromiseRejections() {
  let maybeScheduledTicksOrMicrotasks = asyncHandledRejections.length > 0;

  while (asyncHandledRejections.length > 0) {
    const { promise, warning } = asyncHandledRejections.shift();
Severity: Minor
Found in lts/lib/internal/process/promises.js - About 3 hrs to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function processPromiseRejections has 49 lines of code (exceeds 25 allowed). Consider refactoring.
Open

function processPromiseRejections() {
  let maybeScheduledTicksOrMicrotasks = asyncHandledRejections.length > 0;

  while (asyncHandledRejections.length > 0) {
    const { promise, warning } = asyncHandledRejections.shift();
Severity: Minor
Found in lts/lib/internal/process/promises.js - About 1 hr to fix

    Identical blocks of code found in 2 locations. Consider refactoring.
    Open

    function handledRejection(promise) {
  const promiseInfo = maybeUnhandledPromises.get(promise);
  if (promiseInfo !== undefined) {
    maybeUnhandledPromises.delete(promise);
    if (promiseInfo.warned) {
    Severity: Major
    Found in lts/lib/internal/process/promises.js and 1 other location - About 7 hrs to fix
    current/lib/internal/process/promises.js on lines 132..151

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 183.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

    Identical blocks of code found in 2 locations. Consider refactoring.
    Open

    function emitUnhandledRejectionWarning(uid, reason) {
  const warning = getErrorWithoutStack(
    unhandledRejectionErrName,
    'Unhandled promise rejection. This error originated either by ' +
      'throwing inside of an async function without a catch block, ' +
    Severity: Major
    Found in lts/lib/internal/process/promises.js and 1 other location - About 5 hrs to fix
    current/lib/internal/process/promises.js on lines 154..176

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 140.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

    Identical blocks of code found in 2 locations. Consider refactoring.
    Open

    function getErrorWithoutStack(name, message) {
  // Reset the stack to prevent any overhead.
  const tmp = Error.stackTraceLimit;
  Error.stackTraceLimit = 0;
  // eslint-disable-next-line no-restricted-syntax
    Severity: Major
    Found in lts/lib/internal/process/promises.js and 1 other location - About 2 hrs to fix
    current/lib/internal/process/promises.js on lines 262..276

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 93.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

    Identical blocks of code found in 2 locations. Consider refactoring.
    Open

    function promiseRejectHandler(type, promise, reason) {
  if (unhandledRejectionsMode === undefined) {
    unhandledRejectionsMode = getUnhandledRejectionsMode();
  }
  switch (type) {
    Severity: Major
    Found in lts/lib/internal/process/promises.js and 1 other location - About 2 hrs to fix
    current/lib/internal/process/promises.js on lines 93..111

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 89.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

    Identical blocks of code found in 2 locations. Consider refactoring.
    Open

    function generateUnhandledRejectionError(reason) {
  const message =
    'This error originated either by ' +
    'throwing inside of an async function without a catch block, ' +
    'or by rejecting a promise which was not handled with .catch().' +
    Severity: Major
    Found in lts/lib/internal/process/promises.js and 1 other location - About 1 hr to fix
    current/lib/internal/process/promises.js on lines 278..289

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 71.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

    Similar blocks of code found in 2 locations. Consider refactoring.
    Open

          case kThrowUnhandledRejections: {
        const err = reason instanceof Error ?
          reason : generateUnhandledRejectionError(reason);
        triggerUncaughtException(err, true /* fromPromise */);
        const handled = process.emit('unhandledRejection', reason, promise);
    Severity: Major
    Found in lts/lib/internal/process/promises.js and 1 other location - About 1 hr to fix
    current/lib/internal/process/promises.js on lines 210..217

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 70.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

    Identical blocks of code found in 2 locations. Consider refactoring.
    Open

      while (asyncHandledRejections.length > 0) {
    const { promise, warning } = asyncHandledRejections.shift();
    if (!process.emit('rejectionHandled', promise)) {
      process.emitWarning(warning);
    }
    Severity: Major
    Found in lts/lib/internal/process/promises.js and 1 other location - About 1 hr to fix
    current/lib/internal/process/promises.js on lines 193..198

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 69.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

    Identical blocks of code found in 2 locations. Consider refactoring.
    Open

          case kDefaultUnhandledRejections: {
        const handled = process.emit('unhandledRejection', reason, promise);
        if (!handled) {
          emitUnhandledRejectionWarning(uid, reason);
          if (!deprecationWarned) {
    Severity: Major
    Found in lts/lib/internal/process/promises.js and 1 other location - About 1 hr to fix
    current/lib/internal/process/promises.js on lines 244..254

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 64.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

    Identical blocks of code found in 2 locations. Consider refactoring.
    Open

    function unhandledRejection(promise, reason) {
  maybeUnhandledPromises.set(promise, {
    reason,
    uid: ++lastPromiseId,
    warned: false
    Severity: Major
    Found in lts/lib/internal/process/promises.js and 1 other location - About 1 hr to fix
    current/lib/internal/process/promises.js on lines 121..130

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 62.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

    Identical blocks of code found in 2 locations. Consider refactoring.
    Open

    const {
  tickInfo,
  promiseRejectEvents: {
    kPromiseRejectWithNoHandler,
    kPromiseHandlerAddedAfterReject,
    Severity: Minor
    Found in lts/lib/internal/process/promises.js and 1 other location - About 40 mins to fix
    current/lib/internal/process/promises.js on lines 9..18

    Duplicated Code

    Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

    Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

    When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

    Tuning

    This issue has a mass of 48.

    We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

    The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

    If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

    See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

    Refactorings

    Further Reading

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