Fix #3 url without db and trailing slash

Author: porsager

lib/index.js

@@ -456,7 +456,7 @@ function parseOptions(uri, options) {
     host,
     port,
     path        : o.path || host.indexOf('/') > -1 && host + '/.s.PGSQL.' + port,
-    database    : o.database || o.db || url.pathname.slice(1) || env.PGDATABASE || 'postgres',
+    database    : o.database || o.db || (url.pathname || '').slice(1) || env.PGDATABASE || 'postgres',
     user        : o.user || o.username || auth[0] || env.PGUSERNAME || os.userInfo().username,
     pass        : o.pass || o.password || auth[1] || env.PGPASSWORD || '',
     max         : o.max || url.query.max || Math.max(1, os.cpus().length),

tests/index.js

@@ -47,6 +47,14 @@ t('Connects with no options', async() => {
   return [1, result]
 })
 
+t('Uses default database without slash', async() =>
+  ['postgres', postgres('postgres://localhost').options.database]
+)
+
+t('Uses default database with slash', async() =>
+  ['postgres', postgres('postgres://localhost/').options.database]
+)
+
 t('Result is array', async() =>
   [true, Array.isArray(await sql`select 1`)]
 )