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packages/render/dom/__tests__/ReactComponentLifeCycle-test.js

Summary

Maintainability
F
6 days
Test Coverage

File ReactComponentLifeCycle-test.js has 969 lines of code (exceeds 250 allowed). Consider refactoring.
Open

'use strict';

let React;
let ReactDOM;
let ReactTestUtils;
Severity: Major
Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js - About 2 days to fix

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

      it('should warn if state is not initialized before getDerivedStateFromProps', () => {
    class MyComponent extends React.Component {
      static getDerivedStateFromProps() {
        return null;
      }
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 4 hrs to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 1144..1162

    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 121.

    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

      it('should warn if getSnapshotBeforeUpdate is defined with no componentDidUpdate', () => {
    class MyComponent extends React.Component {
      getSnapshotBeforeUpdate() {
        return null;
      }
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 4 hrs to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 905..923

    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 121.

    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

        class Component extends React.Component {
      state = {};
      static getDerivedStateFromProps() {
        return null;
      }
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 2 hrs to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 688..705

    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 85.

    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

        class Component extends React.Component {
      state = {};
      static getDerivedStateFromProps() {
        return null;
      }
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 2 hrs to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 634..651

    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 85.

    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 4 locations. Consider refactoring.
    Open

      beforeEach(() => {
    jest.resetModules();
    React = require('react');
    ReactDOM = require('react-dom');
    ReactTestUtils = require('test-utils');
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 3 other locations - About 1 hr to fix
    packages/render/dom/__tests__/ReactDOMSelect-test.js on lines 20..26
    packages/render/dom/__tests__/ReactMount-test.js on lines 11..18
    packages/render/dom/__tests__/ReactStatelessComponent-test.js on lines 13..19

    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 66.

    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

          componentWillUnmount() {
        this._testJournal.stateAtStartOfWillUnmount = clone(this.state);
        this._testJournal.lifeCycleAtStartOfWillUnmount = getLifeCycleState(
          this,
        );
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 1 hr to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 316..320

    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 65.

    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

          UNSAFE_componentWillMount() {
        this._testJournal.stateAtStartOfWillMount = clone(this.state);
        this._testJournal.lifeCycleAtStartOfWillMount = getLifeCycleState(this);
        this.state.hasWillMountCompleted = true;
      }
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 1 hr to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 342..348

    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 65.

    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

        expect(() => ReactDOM.render(<AllLegacyLifecycles />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'AllLegacyLifecycles uses getSnapshotBeforeUpdate() but also contains the following legacy lifecycles:\n' +
        '  componentWillMount\n' +
        '  UNSAFE_componentWillReceiveProps\n' +
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 1 hr to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 730..738

    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 57.

    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

        expect(() => ReactDOM.render(<AllLegacyLifecycles />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'AllLegacyLifecycles uses getDerivedStateFromProps() but also contains the following legacy lifecycles:\n' +
        '  componentWillMount\n' +
        '  UNSAFE_componentWillReceiveProps\n' +
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 1 hr to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 815..823

    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 57.

    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

        expect(() => {
      const instance = ReactTestUtils.renderIntoDocument(element);
      expect(instance._isMounted()).toBeTruthy();
    }).toWarnDev('Component is accessing isMounted inside its render()');
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 1 hr to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 227..230

    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 56.

    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

        expect(() => {
      const instance = ReactTestUtils.renderIntoDocument(element);
      expect(instance._isMounted()).toBeTruthy();
    }).toWarnDev('Component is accessing isMounted inside its render()');
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 1 hr to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 254..257

    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 56.

    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 3 locations. Consider refactoring.
    Open

        expect(() => ReactDOM.render(<WillMountAndUpdate />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillMountAndUpdate uses getDerivedStateFromProps() but also contains the following legacy lifecycles:\n' +
        '  componentWillMount\n' +
        '  UNSAFE_componentWillUpdate\n\n' +
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 2 other locations - About 55 mins to fix
    packages/render/dom/__tests__/ReactComponent-test.js on lines 619..626
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 854..861

    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 53.

    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 3 locations. Consider refactoring.
    Open

        expect(() => ReactDOM.render(<WillMountAndUpdate />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillMountAndUpdate uses getSnapshotBeforeUpdate() but also contains the following legacy lifecycles:\n' +
        '  componentWillMount\n' +
        '  UNSAFE_componentWillUpdate\n\n' +
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 2 other locations - About 55 mins to fix
    packages/render/dom/__tests__/ReactComponent-test.js on lines 619..626
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 771..778

    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 53.

    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

        class WillReceiveProps extends React.Component {
      state = {};
      getSnapshotBeforeUpdate() {}
      componentWillReceiveProps() {}
      componentDidUpdate() {}
    Severity: Minor
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 55 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 825..833

    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 53.

    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

        class WillMount extends React.Component {
      state = {};
      getSnapshotBeforeUpdate() {}
      UNSAFE_componentWillMount() {}
      componentDidUpdate() {}
    Severity: Minor
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 55 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 863..871

    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 53.

    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 5 locations. Consider refactoring.
    Open

        expect(() => ReactDOM.render(<WillMount />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillMount uses getSnapshotBeforeUpdate() but also contains the following legacy lifecycles:\n' +
        '  UNSAFE_componentWillMount\n\n' +
        'The above lifecycles should be removed. Learn more about this warning here:\n' +
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 4 other locations - About 40 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 751..757
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 791..797
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 873..879
    packages/render/dom/__tests__/ReactMultiChild-test.js on lines 289..295

    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 49.

    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 5 locations. Consider refactoring.
    Open

        expect(() => ReactDOM.render(<WillMount />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillMount uses getDerivedStateFromProps() but also contains the following legacy lifecycles:\n' +
        '  UNSAFE_componentWillMount\n\n' +
        'The above lifecycles should be removed. Learn more about this warning here:\n' +
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 4 other locations - About 40 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 791..797
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 835..841
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 873..879
    packages/render/dom/__tests__/ReactMultiChild-test.js on lines 289..295

    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 49.

    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 5 locations. Consider refactoring.
    Open

        expect(() => ReactDOM.render(<WillReceiveProps />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillReceiveProps uses getDerivedStateFromProps() but also contains the following legacy lifecycles:\n' +
        '  componentWillReceiveProps\n\n' +
        'The above lifecycles should be removed. Learn more about this warning here:\n' +
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 4 other locations - About 40 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 751..757
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 835..841
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 873..879
    packages/render/dom/__tests__/ReactMultiChild-test.js on lines 289..295

    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 49.

    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 5 locations. Consider refactoring.
    Open

        expect(() => ReactDOM.render(<WillReceiveProps />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillReceiveProps uses getSnapshotBeforeUpdate() but also contains the following legacy lifecycles:\n' +
        '  componentWillReceiveProps\n\n' +
        'The above lifecycles should be removed. Learn more about this warning here:\n' +
    Severity: Major
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 4 other locations - About 40 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 751..757
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 791..797
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 835..841
    packages/render/dom/__tests__/ReactMultiChild-test.js on lines 289..295

    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 49.

    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

        class WillMount extends React.Component {
      state = {};
      static getDerivedStateFromProps() {
        return null;
      }
    Severity: Minor
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 40 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 780..789

    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

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

        class WillReceiveProps extends React.Component {
      state = {};
      static getDerivedStateFromProps() {
        return null;
      }
    Severity: Minor
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 40 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 740..749

    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

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

            if (isInitialRender) {
          this._testJournal.stateInInitialRender = clone(this.state);
          this._testJournal.lifeCycleInInitialRender = getLifeCycleState(this);
        } else {
    Severity: Minor
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 30 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 333..336

    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 45.

    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

          render() {
        return (
          <div>
            <Inner x={this.props.x} />
          </div>
    Severity: Minor
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 30 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 576..582

    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 45.

    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

            } else {
          this._testJournal.stateInLaterRender = clone(this.state);
          this._testJournal.lifeCycleInLaterRender = getLifeCycleState(this);
        }
    Severity: Minor
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 30 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 330..333

    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 45.

    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

          render() {
        return (
          <div>
            <Inner x={this.props.x} />
          </div>
    Severity: Minor
    Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 1 other location - About 30 mins to fix
    packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 500..506

    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 45.

    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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