Ionic/Karma/Jasmine unit testing ERROR [karma]: TypeError: preprocessors.shift(…) is no t a function

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Ionic 3 unit tesing - karma does not run the unit tests.
I was trying to implement unit testing framework using jasmine and karma in my project. Getting the below error while executing the test.

    >karma start ./karma.conf.js



    03 01 2019 15:59:07.178:WARN [preprocess]: Can not load "webpack"!

      Error: Can not resolve circular dependency! (Resolving: preprocess -> preproce

    ssor:webpack -> webpackPlugin -> fileList -> preprocess)

        at error 

03 01 2019 15:59:07.318:ERROR [karma]: TypeError: preprocessors.shift(...) is no

    t a function

        at nextPreprocessor (C:ProjectsMobileMobileApp_LatestAppsTHPnode_modul

    eskarmalibpreprocessor.js:73:28)

        at C:ProjectsMobileMobileApp_LatestAppsTHPnode_moduleskarmalibprepr

    ocessor.js:96:7

        at C:ProjectsMobileMobileApp_LatestAppsTHPnode_modulesgraceful-fsgra

    ceful-fs.js:78:16

        at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:511:3)

    npm ERR! code ELIFECYCLE

    npm ERR! errno 1

    npm ERR! ionic-hello-world@ test: `karma start ./karma.conf.js`

    npm ERR! Exit status 1

    npm ERR!

Ionic version is 3.20.0 and other packages version is as below

"@angular/cli": "1.0.0-rc.4",

        "@ngtools/webpack": "^1.3.0",

        "@types/jasmine": "^2.5.47",

        "jasmine": "^3.3.1",

        "jasmine-core": "3.2.1",

        "jasmine-spec-reporter": "^4.0.0",

        "karma": "0.13.9",

        "karma-chrome-launcher": "^2.0.0",

        "karma-coverage-istanbul-reporter": "^2.0.4",

        "karma-jasmine": "^1.1.0",

        "karma-jasmine-html-reporter": "^1.3.1",

        "karma-mocha-reporter": "2.2.3",

        "karma-phantomjs-launcher": "latest",

        "karma-remap-istanbul": "0.6.0",

        "karma-sourcemap-loader": "^0.3.7",

        "karma-spec-reporter": "latest",

        "karma-webpack": "1.6.0",

        "protractor": "^5.4.2",

        "ts-loader": "^5.3.2",

        "ts-node": "^3.0.2",

        "tslint": "5.1.0",

        "tslint-eslint-rules": "4.0.0",

        "typescript": "~2.2.1",

        "webpack": "2.2.0-rc.3"

Any suggestions..?

asked Jan 3 at 11:12

Praveen Muthusamy

add a comment |

Ionic 3 unit tesing - karma does not run the unit tests.
I was trying to implement unit testing framework using jasmine and karma in my project. Getting the below error while executing the test.

    >karma start ./karma.conf.js



    03 01 2019 15:59:07.178:WARN [preprocess]: Can not load "webpack"!

      Error: Can not resolve circular dependency! (Resolving: preprocess -> preproce

    ssor:webpack -> webpackPlugin -> fileList -> preprocess)

        at error 

03 01 2019 15:59:07.318:ERROR [karma]: TypeError: preprocessors.shift(...) is no

    t a function

        at nextPreprocessor (C:ProjectsMobileMobileApp_LatestAppsTHPnode_modul

    eskarmalibpreprocessor.js:73:28)

        at C:ProjectsMobileMobileApp_LatestAppsTHPnode_moduleskarmalibprepr

    ocessor.js:96:7

        at C:ProjectsMobileMobileApp_LatestAppsTHPnode_modulesgraceful-fsgra

    ceful-fs.js:78:16

        at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:511:3)

    npm ERR! code ELIFECYCLE

    npm ERR! errno 1

    npm ERR! ionic-hello-world@ test: `karma start ./karma.conf.js`

    npm ERR! Exit status 1

    npm ERR!

Ionic version is 3.20.0 and other packages version is as below

"@angular/cli": "1.0.0-rc.4",

        "@ngtools/webpack": "^1.3.0",

        "@types/jasmine": "^2.5.47",

        "jasmine": "^3.3.1",

        "jasmine-core": "3.2.1",

        "jasmine-spec-reporter": "^4.0.0",

        "karma": "0.13.9",

        "karma-chrome-launcher": "^2.0.0",

        "karma-coverage-istanbul-reporter": "^2.0.4",

        "karma-jasmine": "^1.1.0",

        "karma-jasmine-html-reporter": "^1.3.1",

        "karma-mocha-reporter": "2.2.3",

        "karma-phantomjs-launcher": "latest",

        "karma-remap-istanbul": "0.6.0",

        "karma-sourcemap-loader": "^0.3.7",

        "karma-spec-reporter": "latest",

        "karma-webpack": "1.6.0",

        "protractor": "^5.4.2",

        "ts-loader": "^5.3.2",

        "ts-node": "^3.0.2",

        "tslint": "5.1.0",

        "tslint-eslint-rules": "4.0.0",

        "typescript": "~2.2.1",

        "webpack": "2.2.0-rc.3"

Any suggestions..?

asked Jan 3 at 11:12

Praveen Muthusamy

add a comment |

Ionic 3 unit tesing - karma does not run the unit tests.
I was trying to implement unit testing framework using jasmine and karma in my project. Getting the below error while executing the test.

    >karma start ./karma.conf.js



    03 01 2019 15:59:07.178:WARN [preprocess]: Can not load "webpack"!

      Error: Can not resolve circular dependency! (Resolving: preprocess -> preproce

    ssor:webpack -> webpackPlugin -> fileList -> preprocess)

        at error 

03 01 2019 15:59:07.318:ERROR [karma]: TypeError: preprocessors.shift(...) is no

    t a function

        at nextPreprocessor (C:ProjectsMobileMobileApp_LatestAppsTHPnode_modul

    eskarmalibpreprocessor.js:73:28)

        at C:ProjectsMobileMobileApp_LatestAppsTHPnode_moduleskarmalibprepr

    ocessor.js:96:7

        at C:ProjectsMobileMobileApp_LatestAppsTHPnode_modulesgraceful-fsgra

    ceful-fs.js:78:16

        at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:511:3)

    npm ERR! code ELIFECYCLE

    npm ERR! errno 1

    npm ERR! ionic-hello-world@ test: `karma start ./karma.conf.js`

    npm ERR! Exit status 1

    npm ERR!

Ionic version is 3.20.0 and other packages version is as below

"@angular/cli": "1.0.0-rc.4",

        "@ngtools/webpack": "^1.3.0",

        "@types/jasmine": "^2.5.47",

        "jasmine": "^3.3.1",

        "jasmine-core": "3.2.1",

        "jasmine-spec-reporter": "^4.0.0",

        "karma": "0.13.9",

        "karma-chrome-launcher": "^2.0.0",

        "karma-coverage-istanbul-reporter": "^2.0.4",

        "karma-jasmine": "^1.1.0",

        "karma-jasmine-html-reporter": "^1.3.1",

        "karma-mocha-reporter": "2.2.3",

        "karma-phantomjs-launcher": "latest",

        "karma-remap-istanbul": "0.6.0",

        "karma-sourcemap-loader": "^0.3.7",

        "karma-spec-reporter": "latest",

        "karma-webpack": "1.6.0",

        "protractor": "^5.4.2",

        "ts-loader": "^5.3.2",

        "ts-node": "^3.0.2",

        "tslint": "5.1.0",

        "tslint-eslint-rules": "4.0.0",

        "typescript": "~2.2.1",

        "webpack": "2.2.0-rc.3"

Any suggestions..?

asked Jan 3 at 11:12

Praveen Muthusamy

Ionic 3 unit tesing - karma does not run the unit tests.
I was trying to implement unit testing framework using jasmine and karma in my project. Getting the below error while executing the test.

    >karma start ./karma.conf.js



    03 01 2019 15:59:07.178:WARN [preprocess]: Can not load "webpack"!

      Error: Can not resolve circular dependency! (Resolving: preprocess -> preproce

    ssor:webpack -> webpackPlugin -> fileList -> preprocess)

        at error 

03 01 2019 15:59:07.318:ERROR [karma]: TypeError: preprocessors.shift(...) is no

    t a function

        at nextPreprocessor (C:ProjectsMobileMobileApp_LatestAppsTHPnode_modul

    eskarmalibpreprocessor.js:73:28)

        at C:ProjectsMobileMobileApp_LatestAppsTHPnode_moduleskarmalibprepr

    ocessor.js:96:7

        at C:ProjectsMobileMobileApp_LatestAppsTHPnode_modulesgraceful-fsgra

    ceful-fs.js:78:16

        at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:511:3)

    npm ERR! code ELIFECYCLE

    npm ERR! errno 1

    npm ERR! ionic-hello-world@ test: `karma start ./karma.conf.js`

    npm ERR! Exit status 1

    npm ERR!

Ionic version is 3.20.0 and other packages version is as below

"@angular/cli": "1.0.0-rc.4",

        "@ngtools/webpack": "^1.3.0",

        "@types/jasmine": "^2.5.47",

        "jasmine": "^3.3.1",

        "jasmine-core": "3.2.1",

        "jasmine-spec-reporter": "^4.0.0",

        "karma": "0.13.9",

        "karma-chrome-launcher": "^2.0.0",

        "karma-coverage-istanbul-reporter": "^2.0.4",

        "karma-jasmine": "^1.1.0",

        "karma-jasmine-html-reporter": "^1.3.1",

        "karma-mocha-reporter": "2.2.3",

        "karma-phantomjs-launcher": "latest",

        "karma-remap-istanbul": "0.6.0",

        "karma-sourcemap-loader": "^0.3.7",

        "karma-spec-reporter": "latest",

        "karma-webpack": "1.6.0",

        "protractor": "^5.4.2",

        "ts-loader": "^5.3.2",

        "ts-node": "^3.0.2",

        "tslint": "5.1.0",

        "tslint-eslint-rules": "4.0.0",

        "typescript": "~2.2.1",

        "webpack": "2.2.0-rc.3"

Any suggestions..?

ionic3 karma-jasmine karma-webpack

asked Jan 3 at 11:12

Praveen Muthusamy

asked Jan 3 at 11:12

Praveen Muthusamy

asked Jan 3 at 11:12

Praveen Muthusamy

asked Jan 3 at 11:12

Praveen Muthusamy

asked Jan 3 at 11:12

Praveen Muthusamy

add a comment |

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