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Viewing file:     to-have-class.js (2.36 KB)      -rw-r--r--

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.toHaveClass = toHaveClass;

var _utils = require("./utils");

function getExpectedClassNamesAndOptions(params) {
  const lastParam = params.pop();
  let expectedClassNames, options;

  if (typeof lastParam === 'object') {
    expectedClassNames = params;
    options = lastParam;
  } else {
    expectedClassNames = params.concat(lastParam);
    options = {
      exact: false
    };
  }

  return {
    expectedClassNames,
    options
  };
}

function splitClassNames(str) {
  if (!str) {
    return [];
  }

  return str.split(/\s+/).filter(s => s.length > 0);
}

function isSubset(subset, superset) {
  return subset.every(item => superset.includes(item));
}

function toHaveClass(htmlElement, ...params) {
  (0, _utils.checkHtmlElement)(htmlElement, toHaveClass, this);
  const {
    expectedClassNames,
    options
  } = getExpectedClassNamesAndOptions(params);
  const received = splitClassNames(htmlElement.getAttribute('class'));
  const expected = expectedClassNames.reduce((acc, className) => acc.concat(splitClassNames(className)), []);

  if (options.exact) {
    return {
      pass: isSubset(expected, received) && expected.length === received.length,
      message: () => {
        const to = this.isNot ? 'not to' : 'to';
        return (0, _utils.getMessage)(this, this.utils.matcherHint(`${this.isNot ? '.not' : ''}.toHaveClass`, 'element', this.utils.printExpected(expected.join(' '))), `Expected the element ${to} have EXACTLY defined classes`, expected.join(' '), 'Received', received.join(' '));
      }
    };
  }

  return expected.length > 0 ? {
    pass: isSubset(expected, received),
    message: () => {
      const to = this.isNot ? 'not to' : 'to';
      return (0, _utils.getMessage)(this, this.utils.matcherHint(`${this.isNot ? '.not' : ''}.toHaveClass`, 'element', this.utils.printExpected(expected.join(' '))), `Expected the element ${to} have class`, expected.join(' '), 'Received', received.join(' '));
    }
  } : {
    pass: this.isNot ? received.length > 0 : false,
    message: () => this.isNot ? (0, _utils.getMessage)(this, this.utils.matcherHint('.not.toHaveClass', 'element', ''), 'Expected the element to have classes', '(none)', 'Received', received.join(' ')) : [this.utils.matcherHint(`.toHaveClass`, 'element'), 'At least one expected class must be provided.'].join('\n')
  };
}