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'use strict';
const assert = require('assert');const prepareDiscriminatorPipeline = require('../../lib/helpers/aggregate/prepareDiscriminatorPipeline');const stringifyFunctionOperators = require('../../lib/helpers/aggregate/stringifyFunctionOperators');
describe('stringifyFunctionOperators', function() {  it('converts accumulator args to strings (gh-9364)', function() {    const pipeline = [{      $group: {        _id: '$author',        avgCopies: {          $accumulator: {            init: function() {              return { count: 0, sum: 0 };            },            accumulate: function(state, numCopies) {              return {                count: state.count + 1,                sum: state.sum + numCopies              };            },            accumulateArgs: ['$copies'],            merge: function(state1, state2) {              return {                count: state1.count + state2.count,                sum: state1.sum + state2.sum              };            },            finalize: function(state) {              return (state.sum / state.count);            },            lang: 'js'          }        }      }    }];
    stringifyFunctionOperators(pipeline);
    assert.equal(typeof pipeline[0].$group.avgCopies.$accumulator.init, 'string');    assert.equal(typeof pipeline[0].$group.avgCopies.$accumulator.accumulate, 'string');    assert.equal(typeof pipeline[0].$group.avgCopies.$accumulator.merge, 'string');    assert.equal(typeof pipeline[0].$group.avgCopies.$accumulator.finalize, 'string');  });
  it('converts function args to strings (gh-9897)', function() {    const pipeline = [{      $addFields: {        newField: {          $function: {            body: function() {              return true;            },            args: ['$oldField'],            lang: 'js'          }        }      }    }];
    stringifyFunctionOperators(pipeline);
    assert.equal(typeof pipeline[0].$addFields.newField.$function.body, 'string');  });});
describe('prepareDiscriminatorPipeline', function() {  it('handles case where initial $match includes the discriminator key (gh-12478)', function() {    const pipeline = [      {        $match: {          partition: 'Child',          $text: {            $search: 'test'          }        }      }    ];    const fakeSchema = { discriminatorMapping: { isRoot: false, key: 'partition', value: 'Child' } };
    prepareDiscriminatorPipeline(pipeline, fakeSchema);
    assert.deepStrictEqual(pipeline, [      {        $match: {          partition: 'Child',          $text: {            $search: 'test'          }        }      }    ]);  });});