Added ability to connect to databases by name

Add documentation to readme on how to set up tests

README.md

@@ -2,3 +2,8 @@ pgx
 ===
 
 Experimental PostgreSQL client library for Go
+
+Testing
+-------
+
+To setup the test environment create a database named pgx_test.

conn.go

@@ -17,6 +17,9 @@ type conn struct {
 	txStatus      byte
 }
 
+// options:
+//   socket: path to unix domain socket
+//   database: name of database
 func Connect(options map[string]string) (c *conn, err error) {
 	c = new(conn)
 
@@ -35,7 +38,12 @@ func Connect(options map[string]string) (c *conn, err error) {
 
 	// conn, err := net.Dial("tcp", "localhost:5432")
 
+	var database string
+
 	msg := newStartupMessage()
+	if database, present = options["database"]; present {
+		msg.options["database"] = database
+	}
 	msg.options["user"] = "jack"
 	c.txStartupMessage(msg)
 

conn_test.go

@@ -5,7 +5,7 @@ import (
 )
 
 func TestConnect(t *testing.T) {
-	conn, err := Connect(map[string]string{"socket": "/private/tmp/.s.PGSQL.5432"})
+	conn, err := Connect(map[string]string{"socket": "/private/tmp/.s.PGSQL.5432", "database": "pgx_test"})
 	if err != nil {
 		t.Fatal("Unable to establish connection")
 	}
@@ -22,6 +22,12 @@ func TestConnect(t *testing.T) {
 		t.Error("Backend secret key not stored")
 	}
 
+	var rows []map[string]string
+	rows, err = conn.Query("select current_database()")
+	if err != nil || rows[0]["current_database"] != "pgx_test" {
+		t.Error("Did not connect to specified database (pgx_text)")
+	}
+
 	err = conn.Close()
 	if err != nil {
 		t.Fatal("Unable to close connection")