pgx/conn_test.go

package pgx

import (
	"strings"
	"testing"
)

var SharedConnection *Connection

func getSharedConnection() (c *Connection) {
	if SharedConnection == nil {
		var err error
		SharedConnection, err = Connect(map[string]string{"socket": "/private/tmp/.s.PGSQL.5432", "user": "pgx_none", "database": "pgx_test"})
		if err != nil {
			panic("Unable to establish connection")
		}

	}
	return SharedConnection
}

func TestConnect(t *testing.T) {
	conn, err := Connect(map[string]string{"socket": "/private/tmp/.s.PGSQL.5432", "user": "pgx_none", "database": "pgx_test"})
	if err != nil {
		t.Fatal("Unable to establish connection")
	}

	if _, present := conn.runtimeParams["server_version"]; !present {
		t.Error("Runtime parameters not stored")
	}

	if conn.pid == 0 {
		t.Error("Backend PID not stored")
	}

	if conn.secretKey == 0 {
		t.Error("Backend secret key not stored")
	}

	var rows []map[string]string
	rows, err = conn.SelectRows("select current_database()")
	if err != nil || rows[0]["current_database"] != "pgx_test" {
		t.Error("Did not connect to specified database (pgx_text)")
	}

	rows, err = conn.SelectRows("select current_user")
	if err != nil || rows[0]["current_user"] != "pgx_none" {
		t.Error("Did not connect as specified user (pgx_none)")
	}

	err = conn.Close()
	if err != nil {
		t.Fatal("Unable to close connection")
	}
}

func TestConnectWithInvalidUser(t *testing.T) {
	_, err := Connect(map[string]string{"socket": "/private/tmp/.s.PGSQL.5432", "user": "invalid_user", "database": "pgx_test"})
	pgErr := err.(PgError)
	if pgErr.Code != "28000" {
		t.Fatal("Did not receive expected error when connecting with invalid user")
	}
}

func TestConnectWithPlainTextPassword(t *testing.T) {
	conn, err := Connect(map[string]string{"socket": "/private/tmp/.s.PGSQL.5432", "user": "pgx_pw", "password": "secret", "database": "pgx_test"})
	if err != nil {
		t.Fatal("Unable to establish connection: " + err.Error())
	}

	err = conn.Close()
	if err != nil {
		t.Fatal("Unable to close connection")
	}
}

func TestConnectWithMD5Password(t *testing.T) {
	conn, err := Connect(map[string]string{"socket": "/private/tmp/.s.PGSQL.5432", "user": "pgx_md5", "password": "secret", "database": "pgx_test"})
	if err != nil {
		t.Fatal("Unable to establish connection: " + err.Error())
	}

	err = conn.Close()
	if err != nil {
		t.Fatal("Unable to close connection")
	}
}

func TestExecute(t *testing.T) {
	conn := getSharedConnection()

	results, err := conn.Execute("create temporary table foo(id serial primary key);")
	if err != nil {
		t.Fatal("Execute failed: " + err.Error())
	}
	if results != "CREATE TABLE" {
		t.Error("Unexpected results from Execute")
	}

	results, err = conn.Execute("drop table foo;")
	if err != nil {
		t.Fatal("Execute failed: " + err.Error())
	}
	if results != "DROP TABLE" {
		t.Error("Unexpected results from Execute")
	}

	// Multiple statements can be executed -- last command tag is returned
	results, err = conn.Execute("create temporary table foo(id serial primary key); drop table foo;")
	if err != nil {
		t.Fatal("Execute failed: " + err.Error())
	}
	if results != "DROP TABLE" {
		t.Error("Unexpected results from Execute")
	}
}

func TestSelectFunc(t *testing.T) {
	conn := getSharedConnection()

	rowCount := 0
	onDataRow := func(r *messageReader, fields []fieldDescription) error {
		rowCount++
		return nil
	}

	err := conn.SelectFunc("select generate_series(1,10)", onDataRow)
	if err != nil {
		t.Fatal("Select failed: " + err.Error())
	}
	if rowCount != 10 {
		t.Fatal("Select called onDataRow wrong number of times")
	}
}

func TestSelectRows(t *testing.T) {
	conn := getSharedConnection()

	rows, err := conn.SelectRows("select 'Jack' as name, null as position")
	if err != nil {
		t.Fatal("Query failed")
	}

	if len(rows) != 1 {
		t.Fatal("Received wrong number of rows")
	}

	if rows[0]["name"] != "Jack" {
		t.Error("Received incorrect name")
	}

	value, presence := rows[0]["position"]
	if value != "" {
		t.Error("Should have received empty string for null")
	}
	if presence != false {
		t.Error("Null value shouldn't have been present in map")
	}
}

func TestSelectString(t *testing.T) {
	conn := getSharedConnection()

	s, err := conn.SelectString("select 'foo'")
	if err != nil {
		t.Error("Unable to select string: " + err.Error())
	} else if s != "foo" {
		t.Error("Received incorrect string")
	}

	_, err = conn.SelectString("select null")
	if err == nil {
		t.Error("Should have received error on null")
	}
}

func TestSelectInt64(t *testing.T) {
	conn := getSharedConnection()

	i, err := conn.SelectInt64("select 1")
	if err != nil {
		t.Fatal("Unable to select int64: " + err.Error())
	}

	if i != 1 {
		t.Error("Received incorrect int64")
	}

	i, err = conn.SelectInt64("select power(2,65)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number greater than max int64")
	}

	i, err = conn.SelectInt64("select -power(2,65)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number less than min int64")
	}

	_, err = conn.SelectInt64("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectInt32(t *testing.T) {
	conn := getSharedConnection()

	i, err := conn.SelectInt32("select 1")
	if err != nil {
		t.Fatal("Unable to select int32: " + err.Error())
	}

	if i != 1 {
		t.Error("Received incorrect int32")
	}

	i, err = conn.SelectInt32("select power(2,33)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number greater than max int32")
	}

	i, err = conn.SelectInt32("select -power(2,33)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number less than min int32")
	}

	_, err = conn.SelectInt32("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectInt16(t *testing.T) {
	conn := getSharedConnection()

	i, err := conn.SelectInt16("select 1")
	if err != nil {
		t.Fatal("Unable to select int16: " + err.Error())
	}

	if i != 1 {
		t.Error("Received incorrect int16")
	}

	i, err = conn.SelectInt16("select power(2,17)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number greater than max int16")
	}

	i, err = conn.SelectInt16("select -power(2,17)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number less than min int16")
	}

	_, err = conn.SelectInt16("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectFloat64(t *testing.T) {
	conn := getSharedConnection()

	f, err := conn.SelectFloat64("select 1.23")
	if err != nil {
		t.Fatal("Unable to select float64: " + err.Error())
	}

	if f != 1.23 {
		t.Error("Received incorrect float64")
	}

	_, err = conn.SelectFloat64("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectFloat32(t *testing.T) {
	conn := getSharedConnection()

	f, err := conn.SelectFloat32("select 1.23")
	if err != nil {
		t.Fatal("Unable to select float32: " + err.Error())
	}

	if f != 1.23 {
		t.Error("Received incorrect float32")
	}

	_, err = conn.SelectFloat32("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectAllString(t *testing.T) {
	conn := getSharedConnection()

	s, err := conn.SelectAllString("select * from (values ('Matthew'), ('Mark'), ('Luke'), ('John')) t")
	if err != nil {
		t.Fatal("Unable to select all strings: " + err.Error())
	}

	if s[0] != "Matthew" || s[1] != "Mark" || s[2] != "Luke" || s[3] != "John" {
		t.Error("Received incorrect strings")
	}

	_, err = conn.SelectAllString("select * from (values ('Matthew'), (null)) t")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectAllInt64(t *testing.T) {
	conn := getSharedConnection()

	i, err := conn.SelectAllInt64("select * from (values (1), (2)) t")
	if err != nil {
		t.Fatal("Unable to select all int64: " + err.Error())
	}

	if i[0] != 1 || i[1] != 2 {
		t.Error("Received incorrect int64s")
	}

	i, err = conn.SelectAllInt64("select power(2,65)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number greater than max int64")
	}

	i, err = conn.SelectAllInt64("select -power(2,65)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number less than min int64")
	}

	_, err = conn.SelectAllInt64("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectAllInt32(t *testing.T) {
	conn := getSharedConnection()

	i, err := conn.SelectAllInt32("select * from (values (1), (2)) t")
	if err != nil {
		t.Fatal("Unable to select all int32: " + err.Error())
	}

	if i[0] != 1 || i[1] != 2 {
		t.Error("Received incorrect int32")
	}

	i, err = conn.SelectAllInt32("select power(2,33)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number greater than max int32")
	}

	i, err = conn.SelectAllInt32("select -power(2,33)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number less than min int32")
	}

	_, err = conn.SelectAllInt32("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectAllInt16(t *testing.T) {
	conn := getSharedConnection()

	i, err := conn.SelectAllInt16("select * from (values (1), (2)) t")
	if err != nil {
		t.Fatal("Unable to select all int16: " + err.Error())
	}

	if i[0] != 1 || i[1] != 2 {
		t.Error("Received incorrect int16")
	}

	i, err = conn.SelectAllInt16("select power(2,17)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number greater than max int16")
	}

	i, err = conn.SelectAllInt16("select -power(2,17)::numeric")
	if err == nil || !strings.Contains(err.Error(), "value out of range") {
		t.Error("Expected value out of range error when selecting number less than min int16")
	}

	_, err = conn.SelectAllInt16("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectAllFloat64(t *testing.T) {
	conn := getSharedConnection()

	f, err := conn.SelectAllFloat64("select * from (values (1.23), (4.56)) t")
	if err != nil {
		t.Fatal("Unable to select all float64: " + err.Error())
	}

	if f[0] != 1.23 || f[1] != 4.56 {
		t.Error("Received incorrect float64")
	}

	_, err = conn.SelectAllFloat64("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}

func TestSelectAllFloat32(t *testing.T) {
	conn := getSharedConnection()

	f, err := conn.SelectAllFloat32("select * from (values (1.23), (4.56)) t")
	if err != nil {
		t.Fatal("Unable to select all float32: " + err.Error())
	}

	if f[0] != 1.23 || f[1] != 4.56 {
		t.Error("Received incorrect float32")
	}

	_, err = conn.SelectAllFloat32("select null")
	if err == nil || !strings.Contains(err.Error(), "NULL") {
		t.Error("Should have received error on null")
	}
}