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Split test into separate files
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232
test/index.js
232
test/index.js
@@ -1,228 +1,4 @@
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//mock tools
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const Op = {
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eq: 'eq'
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};
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const books = {
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findAll: async args => {
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let arr = [
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{ id: 1, title: 'Outlander', published: '1991', rating: 9.5 },
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{ id: 2, title: 'Dragonfly in Amber', published: '1992', rating: 9.5 },
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{ id: 3, title: 'Voyager', published: '1993', rating: 9.5 },
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{ id: 4, title: 'Drums of Autumn', published: '1996', rating: 9.5 },
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{ id: 5, title: 'The Fiery Cross', published: '2000', rating: 9.5 }, //Incorrect, the correct publish date is 2001
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{ id: 6, title: 'The Breath of Snow and Ashes', published: '2005', rating: 9.5 },
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{ id: 7, title: 'An Echo in the Bone', published: '2009', rating: 9.5 },
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{ id: 8, title: 'Written in my Own Heart\'s Blood', published: '2014', rating: 9.5 },
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{ id: 9, title: 'Go Tell the Bees That I Am Gone', published: null, rating: 9.5 },
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{ id: 10, title: 'The Forest of Silence', published: '2000', rating: 9.5 },
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{ id: 11, title: 'The Lake of Tears', published: '2000', rating: 9.5 },
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{ id: 12, title: 'The City of Rats', published: '2000', rating: 9.5 },
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{ id: 13, title: 'The Shifting Sands', published: '2000', rating: 9.5 },
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{ id: 14, title: 'Dread Mountain', published: '2000', rating: 9.5 },
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{ id: 15, title: 'The Maze of the Beast', published: '2000', rating: 9.5 },
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{ id: 16, title: 'The Valley of the Lost', published: '2000', rating: 9.5 },
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{ id: 17, title: 'Return to Del', published: '2000', rating: 9.5 },
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{ id: 18, title: 'The Wind in the Willows', published: '1908', rating: 9.5 },
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];
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const { attributes, where } = args;
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//filter out non-matching elements
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arr = arr.filter(element => {
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if (Object.keys(where).length == 0) {
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return true;
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}
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return Object.keys(where).reduce((result, key) => {
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return result && (element[key] || 'null').toString() == where[key].eq.toString();
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}, true);
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});
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//filter out non-used attributes
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arr = arr.map(element => {
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//only they element keys that are in attributes
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const keys = Object.keys(element).filter(key => attributes.includes(key));
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//determine which fields to carry over
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const ret = {};
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keys.forEach(key => ret[key] = element[key]);
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return ret;
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});
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return arr;
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}
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}
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const authors = {
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findAll: async args => {
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let arr = [
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{ id: 1, name: 'Diana Gabaldon', books: [1, 2, 3, 4, 5, 6, 7, 8, 9] },
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{ id: 2, name: 'Emily Rodda', books: [10, 11, 12, 13, 14, 15, 16, 17] },
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{ id: 3, name: 'Kenneth Grahame', books: [18] }
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];
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const { attributes, where } = args;
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//filter out non-matching elements
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arr = arr.filter(element => {
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if (Object.keys(where).length == 0) {
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return true;
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}
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return Object.keys(where).reduce((result, key) => {
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return result && (element[key] || 'null').toString() == where[key].eq.toString();
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}, true);
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});
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//filter out non-used attributes
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arr = arr.map(element => {
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//only they element keys that are in attributes
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const keys = Object.keys(element).filter(key => attributes.includes(key));
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//determine which fields to carry over
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const ret = {};
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keys.forEach(key => ret[key] = element[key]);
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return ret;
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});
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return arr;
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}
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}
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//the handler functions return arrays for each type, containing every element that satisfies the queries
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//the "query" argument contains the object built from the sineQL query
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//the "graph" argument contains the typeGraph
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//the task of the handler functions is to query the database, and return the correct results
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/* possible values for "query" include:
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{
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typeName: 'Author',
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name: { typeName: 'String', scalar: true, match: 'Kenneth Grahame' },
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books: { typeName: 'Book', match: {
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typeName: 'Book',
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title: { typeName: 'String', scalar: true, match: 'The wind in the Willows' }
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published: { typeName: 'Date', scalar: true }
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}
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}
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*/
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//depth-first search seems to be the best option
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//Each query shouldn't know if it's a sub-query
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const queryHandlers = {
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//complex compound
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Author: async (query, graph) => {
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//DEBUGGING
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// console.log('Author():', query);
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//get the fields alone
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const { typeName, ...fields } = query;
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//hack the id into the fields list (if it's not there already)
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fields['id'] = fields['id'] || { typeName: 'Integer', scalar: true };
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//get the names of matched fields (fields to find)
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const matchedNames = Object.keys(fields).filter(field => fields[field].match);
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//short-circuit if querying everything
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const where = {};
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if (matchedNames.length > 0) {
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//build the "where" object
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matchedNames.forEach(mn => {
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if (query[mn].match !== true) { //true means it's a compound type
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where[mn] = { [Op.eq]: query[mn].match };
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}
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});
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}
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//these are field names
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const scalars = Object.keys(fields).filter(field => graph[fields[field].typeName].scalar);
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const nonScalars = Object.keys(fields).filter(field => !graph[fields[field].typeName].scalar);
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let authorResults = await authors.findAll({
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attributes: Object.keys(fields), //fields to find (keys)
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where: where
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}); //sequelize ORM model
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const promiseArray = nonScalars.map(async nonScalar => {
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//delegate to a deeper part of the tree
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const nonScalarArray = await queryHandlers[fields[nonScalar].typeName](fields[nonScalar], graph);
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//for each author, update this non-scalar field with the non-scalar's recursed value
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authorResults.forEach(author => {
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author[nonScalar] = nonScalarArray.filter(ns => author[nonScalar].includes(ns.id)); //using the hacked-in ID field (JOIN)
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});
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//prune the authors when matching, but their results are empty
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authorResults = authorResults.filter(author => {
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return !(fields[nonScalar].match && author[nonScalar].length == 0);
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});
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});
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await Promise.all(promiseArray);
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//finally, return the results
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return authorResults;
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},
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//simple compound
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Book: async (query, graph) => {
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// console.log('Book():', query);
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//get the fields alone
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const { typeName, ...fields } = query;
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//hack the id into the fields list (if it's not there already)
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fields['id'] = fields['id'] || { typeName: 'Integer', scalar: true }; //TODO: should this be automatic?
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//get the names of matched fields
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const matchedNames = Object.keys(fields).filter(field => fields[field].match);
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//short-circuit if querying everything
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const where = {};
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if (matchedNames.length > 0) {
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//build the "where" object
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matchedNames.forEach(mn => {
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if (query[mn].match !== true) {
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where[mn] = { [Op.eq]: query[mn].match };
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}
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});
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}
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//return the result
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return await books.findAll({
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attributes: Object.keys(fields), //fields to find
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where: where
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}); //sequelize ORM model
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}
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};
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//the matching schema
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const schema = `
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scalar Date
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type Book {
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String title
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Date published
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Float rating
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}
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type Author {
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String name
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Book books
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}
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`;
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//input tool
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//input tools
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const readline = require('readline');
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const rl = readline.createInterface({
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@@ -247,7 +23,11 @@ const question = (prompt, def = null) => {
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//the library to test
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const sineQL = require('../source/index.js');
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//run the function in debug mode (builds type graph)
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//the arguments to the library
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const schema = require('./schema');
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const queryHandlers = require('./query-handlers');
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//run the setup function to create the closure (creates the type graph)
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const sine = sineQL(schema, { queryHandlers }, { debug: false });
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//actually ask the question
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