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yahoo/blink-diff

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index.js

Summary

Maintainability
F
1 wk
Test Coverage

File index.js has 507 lines of code (exceeds 250 allowed). Consider refactoring.
Open

// Copyright 2014-2015 Yahoo! Inc.
// Copyrights licensed under the Mit License. See the accompanying LICENSE file for terms.

var assert = require('assert'),
    PNGImage = require('pngjs-image'),
Severity: Major
Found in index.js - About 1 day to fix

Function run has 95 lines of code (exceeds 25 allowed). Consider refactoring.
Open

    run: function (fn) {

        var promise = Promise.resolve(), result;

        PNGImage.log = function (text) {
Severity: Major
Found in index.js - About 3 hrs to fix

Function runSync has 88 lines of code (exceeds 25 allowed). Consider refactoring.
Open

    runSync: function () {

        var result, gamma, i, len, rect, color;

        PNGImage.log = function (text) {
Severity: Major
Found in index.js - About 3 hrs to fix

prototype has 25 functions (exceeds 20 allowed). Consider refactoring.
Open

BlinkDiff.prototype = {

    /**
     * Runs the comparison with a promise
     *
Severity: Minor
Found in index.js - About 2 hrs to fix

Function BlinkDiff has 61 lines of code (exceeds 25 allowed). Consider refactoring.
Open

function BlinkDiff (options) {

    this._imageA = options.imageA;
    this._imageAPath = options.imageAPath;
    assert.ok(options.imageAPath || options.imageA, "Image A not given.");
Severity: Major
Found in index.js - About 2 hrs to fix

Function runSync has a Cognitive Complexity of 18 (exceeds 5 allowed). Consider refactoring.
Open

    runSync: function () {

        var result, gamma, i, len, rect, color;

        PNGImage.log = function (text) {
Severity: Minor
Found in index.js - About 2 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 _shiftCompare has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

    _shiftCompare: function (x, y, color, deltaThreshold, imageA, imageB, width, height, hShift, vShift, perceptual, gamma) {

        var i, xOffset, xLow, xHigh, yOffset, yLow, yHigh, delta, color1, color2, localDeltaThreshold;

        if ((hShift > 0) || (vShift > 0)) {
Severity: Minor
Found in index.js - About 2 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 _pixelCompare has 13 arguments (exceeds 4 allowed). Consider refactoring.
Open

    _pixelCompare: function (imageA, imageB, imageOutput, deltaThreshold, width, height, outputMaskColor, outputShiftColor, backgroundColor, hShift, vShift, perceptual, gamma) {
Severity: Major
Found in index.js - About 1 hr to fix

Function _shiftCompare has 12 arguments (exceeds 4 allowed). Consider refactoring.
Open

    _shiftCompare: function (x, y, color, deltaThreshold, imageA, imageB, width, height, hShift, vShift, perceptual, gamma) {
Severity: Major
Found in index.js - About 1 hr to fix

Function _pixelCompare has a Cognitive Complexity of 12 (exceeds 5 allowed). Consider refactoring.
Open

    _pixelCompare: function (imageA, imageB, imageOutput, deltaThreshold, width, height, outputMaskColor, outputShiftColor, backgroundColor, hShift, vShift, perceptual, gamma) {
        var difference = 0, i, x, y, delta, color1, color2;

        for (x = 0; x < width; x++) {
            for (y = 0; y < height; y++) {
Severity: Minor
Found in index.js - About 1 hr 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 _compare has 11 arguments (exceeds 4 allowed). Consider refactoring.
Open

    _compare: function (imageA, imageB, imageOutput, deltaThreshold, outputMaskColor, outputShiftColor, backgroundColor, hShift, vShift, perceptual, gamma) {
Severity: Major
Found in index.js - About 1 hr to fix

Function _compare has 26 lines of code (exceeds 25 allowed). Consider refactoring.
Open

    _compare: function (imageA, imageB, imageOutput, deltaThreshold, outputMaskColor, outputShiftColor, backgroundColor, hShift, vShift, perceptual, gamma) {

        var result = {
            code: BlinkDiff.RESULT_UNKNOWN,
            differences: undefined,
Severity: Minor
Found in index.js - About 1 hr to fix

Consider simplifying this complex logical expression.
Open

            if (this._gamma || this._gammaR || this._gammaG || this._gammaB) {
                gamma = {
                    r: this._gammaR || this._gamma, g: this._gammaG || this._gamma, b: this._gammaB || this._gamma
                };
            }
Severity: Major
Found in index.js - About 1 hr to fix

Consider simplifying this complex logical expression.
Open

            if (this._gamma || this._gammaR || this._gammaG || this._gammaB) {
                gamma = {
                    r: this._gammaR || this._gamma, g: this._gammaG || this._gamma, b: this._gammaB || this._gamma
                };
            }
Severity: Major
Found in index.js - About 1 hr to fix

Avoid deeply nested control flow statements.
Open

                        if ((Math.abs(delta - localDeltaThreshold) < deltaThreshold) && (localDeltaThreshold > deltaThreshold)) {
                            return true;
                        }
Severity: Major
Found in index.js - About 45 mins to fix

Function _correctGamma has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

    _correctGamma: function (color, gamma) {

        // Convert to range [0, 1]
        var result = {
            c1: color.c1 / 255, c2: color.c2 / 255, c3: color.c3 / 255, c4: color.c4
Severity: Minor
Found in index.js - About 35 mins 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 BlinkDiff has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

function BlinkDiff (options) {

    this._imageA = options.imageA;
    this._imageAPath = options.imageAPath;
    assert.ok(options.imageAPath || options.imageA, "Image A not given.");
Severity: Minor
Found in index.js - About 25 mins 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 _clip has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

    _clip: function (imageA, imageB) {

        var minWidth, minHeight;

        if ((imageA.getWidth() != imageB.getWidth()) || (imageA.getHeight() != imageB.getHeight())) {
Severity: Minor
Found in index.js - About 25 mins 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

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

            result = this._compare(this._imageACompare, this._imageBCompare, this._imageOutput, this._delta, { // Output-Mask color
                    red: this._outputMaskRed,
                    green: this._outputMaskGreen,
                    blue: this._outputMaskBlue,
                    alpha: this._outputMaskAlpha,
Severity: Major
Found in index.js and 1 other location - About 1 day to fix
index.js on lines 559..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 201.

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

            result = this._compare(this._imageACompare, this._imageBCompare, this._imageOutput, this._delta,
                { // Output-Mask color
                    red: this._outputMaskRed,
                    green: this._outputMaskGreen,
                    blue: this._outputMaskBlue,
Severity: Major
Found in index.js and 1 other location - About 1 day to fix
index.js on lines 432..450

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 201.

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

            if (((width > height) && !this._composeLeftToRight) || this._composeTopToBottom) {
                image = PNGImage.createImage(width, height * 3);

                imageA.getImage().bitblt(image.getImage(), 0, 0, imageA.getWidth(), imageA.getHeight(), 0, 0);
                imageOutput.getImage().bitblt(image.getImage(), 0, 0, imageOutput.getWidth(), imageOutput.getHeight(), 0, height);
Severity: Major
Found in index.js and 1 other location - About 6 hrs to fix
lib/configuration/output.js on lines 233..245

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 163.

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

            for (i = 0, len = this._blockOut.length; i < len; i++) {
                rect = this._blockOut[i];

                // Make sure the block-out parameters fit
                this._correctDimensions(this._imageACompare.getWidth(), this._imageACompare.getHeight(), rect);
Severity: Major
Found in index.js and 1 other location - About 6 hrs to fix
index.js on lines 403..411

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 162.

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

            for (i = 0, len = this._blockOut.length; i < len; i++) {
                rect = this._blockOut[i];

                // Make sure the block-out parameters fit
                this._correctDimensions(this._imageACompare.getWidth(), this._imageACompare.getHeight(), rect);
Severity: Major
Found in index.js and 1 other location - About 6 hrs to fix
index.js on lines 530..538

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 162.

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

            if (this._gamma || this._gammaR || this._gammaG || this._gammaB) {
                gamma = {
                    r: this._gammaR || this._gamma, g: this._gammaG || this._gamma, b: this._gammaB || this._gamma
                };
            }
Severity: Major
Found in index.js and 1 other location - About 3 hrs to fix
index.js on lines 425..429

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 98.

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

            if (this._gamma || this._gammaR || this._gammaG || this._gammaB) {
                gamma = {
                    r: this._gammaR || this._gamma, g: this._gammaG || this._gamma, b: this._gammaB || this._gamma
                };
            }
Severity: Major
Found in index.js and 1 other location - About 3 hrs to fix
index.js on lines 552..556

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 98.

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

            if (this._copyImageAToOutput) {
                this._copyImage(this._debug ? this._imageACompare : this._imageA, this._imageOutput);
            } else if (this._copyImageBToOutput) {
                this._copyImage(this._debug ? this._imageBCompare : this._imageB, this._imageOutput);
            }
Severity: Major
Found in index.js and 1 other location - About 3 hrs to fix
index.js on lines 541..545

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 95.

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

            if (this._debug) {
                this._imageACompare = this._imageA;
                this._imageBCompare = this._imageB;
            } else {
                this._imageACompare = PNGImage.copyImage(this._imageA);
Severity: Major
Found in index.js and 1 other location - About 3 hrs to fix
index.js on lines 514..520

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 95.

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

            if (this._debug) {
                this._imageACompare = this._imageA;
                this._imageBCompare = this._imageB;
            } else {
                this._imageACompare = PNGImage.copyImage(this._imageA);
Severity: Major
Found in index.js and 1 other location - About 3 hrs to fix
index.js on lines 387..393

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 95.

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

            if (this._copyImageAToOutput) {
                this._copyImage(this._debug ? this._imageACompare : this._imageA, this._imageOutput);
            } else if (this._copyImageBToOutput) {
                this._copyImage(this._debug ? this._imageBCompare : this._imageB, this._imageOutput);
            }
Severity: Major
Found in index.js and 1 other location - About 3 hrs to fix
index.js on lines 414..418

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 95.

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

            if (this._debug) {
                this._imageOutput = this._createComposition(this._imageACompare, this._imageBCompare, this._imageOutput);
            } else {
                this._imageOutput = this._createComposition(this._imageA, this._imageB, this._imageOutput);
            }
Severity: Major
Found in index.js and 1 other location - About 2 hrs to fix
index.js on lines 453..457

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

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

            if (this._debug) {
                this._imageOutput = this._createComposition(this._imageACompare, this._imageBCompare, this._imageOutput);
            } else {
                this._imageOutput = this._createComposition(this._imageA, this._imageB, this._imageOutput);
            }
Severity: Major
Found in index.js and 1 other location - About 2 hrs to fix
index.js on lines 585..589

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

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

            if (this._cropImageB) {
                this._correctDimensions(this._imageB.getWidth(), this._imageB.getHeight(), this._cropImageB);
                this._crop("Image-B", this._imageB, this._cropImageB);
            }
Severity: Major
Found in index.js and 1 other location - About 1 hr to fix
index.js on lines 376..379

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 73.

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

            if (this._cropImageA) {
                this._correctDimensions(this._imageA.getWidth(), this._imageA.getHeight(), this._cropImageA);
                this._crop("Image-A", this._imageA, this._cropImageA);
            }
Severity: Major
Found in index.js and 1 other location - About 1 hr to fix
index.js on lines 372..375

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 73.

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

            if (this._cropImageA) {
                this._correctDimensions(this._imageA.getWidth(), this._imageA.getHeight(), this._cropImageA);
                this._crop("Image-A", this._imageA, this._cropImageA);
            }
Severity: Major
Found in index.js and 1 other location - About 1 hr to fix
index.js on lines 499..502

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 73.

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

            if (this._cropImageB) {
                this._correctDimensions(this._imageB.getWidth(), this._imageB.getHeight(), this._cropImageB);
                this._crop("Image-B", this._imageB, this._cropImageB);
            }
Severity: Major
Found in index.js and 1 other location - About 1 hr to fix
index.js on lines 503..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 73.

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

            color = {
                red: this._blockOutRed,
                green: this._blockOutGreen,
                blue: this._blockOutBlue,
                alpha: this._blockOutAlpha,
Severity: Major
Found in index.js and 1 other location - About 1 hr to fix
index.js on lines 396..402

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 55.

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

            color = {
                red: this._blockOutRed,
                green: this._blockOutGreen,
                blue: this._blockOutBlue,
                alpha: this._blockOutAlpha,
Severity: Major
Found in index.js and 1 other location - About 1 hr to fix
index.js on lines 523..529

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 55.

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

        PNGImage.log = function (text) {
            this.log('ERROR: ' + text);
            throw new Error('ERROR: ' + text);
        }.bind(this);
Severity: Minor
Found in index.js and 1 other location - About 50 mins to fix
index.js on lines 353..356

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 51.

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 if (this.isAboveThreshold(result.differences, result.dimension)) {
            this.log("Images are visibly different");
            this.log(result.differences + " pixels are different");
            result.code = BlinkDiff.RESULT_DIFFERENT;
            return result;
Severity: Minor
Found in index.js and 1 other location - About 50 mins to fix
index.js on lines 1205..1210

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 51.

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

        PNGImage.log = function (text) {
            this.log('ERROR: ' + text);
            throw new Error('ERROR: ' + text);
        }.bind(this);
Severity: Minor
Found in index.js and 1 other location - About 50 mins to fix
index.js on lines 489..492

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 51.

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.log("Images are similar");
            this.log(result.differences + " pixels are different");
            result.code = BlinkDiff.RESULT_SIMILAR;
            return result;
Severity: Minor
Found in index.js and 1 other location - About 50 mins to fix
index.js on lines 1199..1205

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 51.

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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