support pg-promise init options

spec/PostgresInitOptions.spec.js

@@ -1 +1,59 @@
+const Parse = require('parse/node').Parse;
+const PostgresStorageAdapter = require('../src/Adapters/Storage/Postgres/PostgresStorageAdapter');
+const postgresURI = 'postgres://username:password@localhost:5432/db-name';
 
+//public schema
+const databaseOptions1 = {
+	initOptions: {
+		connect: function (client, dc, isFresh) {
+			if (isFresh) {
+				client.query('SET search_path = public');
+			}
+		}
+	}
+};
+
+
+//not exists schema
+const databaseOptions2 = {
+	initOptions: {
+		connect: function (client, dc, isFresh) {
+			if (isFresh) {
+				client.query('SET search_path = not_exists_schema');
+			}
+		}
+	}
+};
+
+
+const GameScore = Parse.Object.extend({
+	className: "GameScore"
+});
+
+describe('Postgres database init options', () => {
+	it('create server with public schema databaseOptions,shoud be ok', (done) => {
+		reconfigureServer({
+			databaseAdapter: new PostgresStorageAdapter({
+				uri: postgresURI, collectionPrefix: 'test_',
+				databaseOptions: databaseOptions1
+			})
+		}).then(done, fail);
+	});
+
+	it("save new GameScore in public schema", function (done) {
+		var score = new GameScore({ "score": 1337, "playerName": "Sean Plott", "cheatMode": false });
+		score.save().then(done, fail);
+	});
+
+	it('create server with not exists schema databaseOptions,shoud be fail', (done) => {
+		reconfigureServer({
+			databaseAdapter: new PostgresStorageAdapter({
+				uri: postgresURI, collectionPrefix: 'test_',
+				databaseOptions: databaseOptions2
+			})
+		}).catch(error => {
+			expect(error.code).toEqual('3F000');
+			done();
+		});
+	});
+});