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getOperator.js
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getOperator.js
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var type = require('type-detect');
var flag = require('./flag');
function isObjectType(obj) {
var objectType = type(obj);
var objectTypes = ['Array', 'Object', 'function'];
return objectTypes.indexOf(objectType) !== -1;
}
/**
* ### .getOperator(message)
*
* Extract the operator from error message.
* Operator defined is based on below link
* https://nodejs.org/api/assert.html#assert_assert.
*
* Returns the `operator` or `undefined` value for an Assertion.
*
* @param {Object} object (constructed Assertion)
* @param {Arguments} chai.Assertion.prototype.assert arguments
* @namespace Utils
* @name getOperator
* @api public
*/
module.exports = function getOperator(obj, args) {
var operator = flag(obj, 'operator');
var negate = flag(obj, 'negate');
var expected = args[3];
var msg = negate ? args[2] : args[1];
if (operator) {
return operator;
}
if (typeof msg === 'function') msg = msg();
msg = msg || '';
if (!msg) {
return undefined;
}
if (/\shave\s/.test(msg)) {
return undefined;
}
var isObject = isObjectType(expected);
if (/\snot\s/.test(msg)) {
return isObject ? 'notDeepStrictEqual' : 'notStrictEqual';
}
return isObject ? 'deepStrictEqual' : 'strictEqual';
};