test: Add test for database migration

tests/test_database.js

@@ -2,7 +2,7 @@ const assert = require('assert');
 const frappe = require('frappejs');
 const helpers = require('./helpers');
 
-describe('Database', () => {
+describe('Database CRUD', () => {
   before(async function() {
     await helpers.initSqlite();
   });

tests/test_migrate.js

@@ -0,0 +1,76 @@
+const assert = require('assert');
+const frappe = require('frappejs');
+const server = require('frappejs/server');
+const SQLite = require('frappejs/backends/sqlite');
+
+let Person = {
+  name: 'Person',
+  fields: [
+    {
+      label: 'Full Name',
+      fieldname: 'name',
+      fieldtype: 'Data'
+    },
+    {
+      label: 'Age',
+      fieldname: 'age',
+      fieldtype: 'Int'
+    },
+    {
+      label: 'Gender',
+      fieldname: 'gender',
+      fieldtype: 'Link',
+      target: 'Gender'
+    }
+  ]
+};
+
+let Gender = {
+  name: 'Gender',
+  fields: [
+    {
+      label: 'Name',
+      fieldname: 'name',
+      fieldtype: 'Data'
+    }
+  ]
+};
+
+describe('Database Migrate', () => {
+  it('should create tables for model definition', async () => {
+    let dbPath = '_migrate_test.db';
+    server.init();
+    let models = {
+      models: {
+        Person,
+        Gender
+      }
+    };
+    frappe.models = {};
+    frappe.registerModels(models);
+    frappe.db = new SQLite({ dbPath });
+    await frappe.db.connect();
+    await frappe.db.migrate();
+
+    let tables = await frappe.db
+      .knex('sqlite_master')
+      .select('name')
+      .where('type', 'table')
+      .orderBy('name')
+      .pluck('name');
+
+    // check if tables were created
+    assert.deepEqual(['Gender', 'Person'], tables);
+
+    let fields = await frappe.db.sql('PRAGMA table_info(??)', 'Person')
+    // check if standard fields and model fields were created
+    assert.equal(fields.length, 8);
+    assert.equal(fields.find(d => d.name === 'age').type, 'integer');
+
+    let foreignKeys = await frappe.db.sql('PRAGMA foreign_key_list(??)', 'Person')
+    // check for foreign keys
+    assert.equal(foreignKeys.length, 1);
+    assert.equal(foreignKeys[0].from, 'gender');
+    assert.equal(foreignKeys[0].table, 'Gender');
+  });
+});