text: /**
   * @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
   * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
   */
  
  /* eslint-disable ckeditor5-rules/ckeditor-error-message */
  
  /* global console */
  
  import { default as CKEditorError, DOCUMENTATION_URL, logError, logWarning } from '../src/ckeditorerror';
  import { expectToThrowCKEditorError } from './_utils/utils';
  import testUtils from '@ckeditor/ckeditor5-core/tests/_utils/utils';
  
  describe( 'CKEditorError', () => {
  	it( 'inherits from Error', () => {
  		const error = new CKEditorError( 'foo', null );
  
  		expect( error ).to.be.an.instanceOf( Error );
  		expect( error ).to.be.an.instanceOf( CKEditorError );
  	} );
  
  	it( 'sets the name', () => {
  		const error = new CKEditorError( 'foo', null );
  
  		expect( error ).to.have.property( 'name', 'CKEditorError' );
  	} );
  
  	it( 'sets the message', () => {
  		const error = new CKEditorError( 'foo', null );
  
  		expect( error ).to.have.property( 'message' ).that.matches( /^foo/ );
  		expect( error.data ).to.be.undefined;
  	} );
  
  	it( 'sets the message and data', () => {
  		const data = { bar: 1 };
  		const error = new CKEditorError( 'foo', null, data );
  
  		expect( error ).to.have.property(
  			'message',
  			`foo {"bar":1}\nRead more: ${ DOCUMENTATION_URL }#error-foo`
  		);
  		expect( error ).to.have.property( 'data', data );
  	} );
  
  	it( 'sets the context of the error', () => {
  		const data = { bar: 1 };
  		const editor = {};
  		const error = new CKEditorError( 'foo', editor, data );
  
  		expect( error.context ).to.equal( editor );
  	} );
  
  	it( 'appends stringified data to the message', () => {
  		class Foo {
  			constructor() {
  				this.x = 1;
  			}
  		}
  
  		const data = {
  			bar: 'a',
  			bom: new Foo(),
  			bim: 10
  		};
  		const error = new CKEditorError( 'foo', null, data );
  
  		expect( error ).to.have.property(
  			'message',
  			`foo {"bar":"a","bom":{"x":1},"bim":10}\nRead more: ${ DOCUMENTATION_URL }#error-foo`
  		);
  		expect( error ).to.have.property( 'data', data );
  	} );
  
  	it( 'contains a link which leads to the documentation', () => {
  		const error = new CKEditorError( 'model-schema-no-item', null );
  
  		const errorMessage = `model-schema-no-item\nRead more: ${ DOCUMENTATION_URL }#error-model-schema-no-item`;
  
  		expect( error ).to.have.property( 'message', errorMessage );
  	} );
  
  	it( 'link to documentation is added after the additional data message', () => {
  		const error = new CKEditorError( 'model-schema-no-item', null, { foo: 1, bar: 2 } );
  
  		const errorMessage = `model-schema-no-item {"foo":1,"bar":2}\nRead more: ${ DOCUMENTATION_URL }#error-model-schema-no-item`;
  
  		expect( error ).to.have.property( 'message', errorMessage );
  	} );
  
  	describe( 'is()', () => {
  		it( 'checks if error is an instance of CKEditorError', () => {
  			const ckeditorError = new CKEditorError( 'foo', null );
  			const regularError = new Error( 'foo' );
  
  			expect( ( !!ckeditorError.is && ckeditorError.is( 'CKEditorError' ) ) ).to.be.true;
  			expect( ( !!regularError.is && regularError.is( 'CKEditorError' ) ) ).to.be.false;
  		} );
  	} );
  
  	describe( 'static rethrowUnexpectedError()', () => {
  		it( 'should rethrow the original CKEditorError as it is', () => {
  			const ckeditorError = new CKEditorError( 'foo', null );
  
  			expectToThrowCKEditorError( () => {
  				CKEditorError.rethrowUnexpectedError( ckeditorError, {} );
  			}, /foo/, null );
  		} );
  
  		it( 'should rethrow an unexpected error wrapped in CKEditorError', () => {
  			const error = new Error( 'foo' );
  			error.stack = 'bar';
  			const context = {};
  
  			expectToThrowCKEditorError( () => {
  				CKEditorError.rethrowUnexpectedError( error, context );
  			}, /foo/, context );
  		} );
  	} );
  
  	describe( 'logWarning()', () => {
  		beforeEach( () => {
  			testUtils.sinon.stub( console, 'warn' );
  		} );
  
  		afterEach( () => {
  			console.warn.restore();
  		} );
  
  		it( 'should log warning with data and link to the documentation', () => {
  			logWarning( 'foo', { name: 'foo' } );
  
  			sinon.assert.calledOnce( console.warn );
  			sinon.assert.calledWithExactly( console.warn,
  				sinon.match( 'foo' ),
  				{ name: 'foo' },
  				`\nRead more: ${ DOCUMENTATION_URL }#error-foo`
  			);
  		} );
  
  		it( 'should log warning without data and with a link to the documentation', () => {
  			logWarning( 'foo' );
  
  			sinon.assert.calledOnce( console.warn );
  			sinon.assert.calledWithExactly( console.warn,
  				sinon.match( 'foo' ),
  				`\nRead more: ${ DOCUMENTATION_URL }#error-foo`
  			);
  		} );
  	} );
  
  	describe( 'logError()', () => {
  		beforeEach( () => {
  			testUtils.sinon.stub( console, 'error' );
  		} );
  
  		afterEach( () => {
  			console.error.restore();
  		} );
  
  		it( 'should log error with data and link to the documentation', () => {
  			logError( 'foo', { name: 'foo' } );
  
  			sinon.assert.calledOnce( console.error );
  			sinon.assert.calledWithExactly( console.error,
  				sinon.match( 'foo' ),
  				{ name: 'foo' },
  				`\nRead more: ${ DOCUMENTATION_URL }#error-foo`
  			);
  		} );
  
  		it( 'should log error without data and with a link to the documentation', () => {
  			logError( 'foo' );
  
  			sinon.assert.calledOnce( console.error );
  			sinon.assert.calledWithExactly( console.error,
  				sinon.match( 'foo' ),
  				`\nRead more: ${ DOCUMENTATION_URL }#error-foo`
  			);
  		} );
  	} );
  } );
  