139 lines
3.8 KiB
Go
139 lines
3.8 KiB
Go
// Copyright 2019 The Go Cloud Development Kit Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package postgres
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import (
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"bytes"
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"context"
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"fmt"
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"io/ioutil"
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"net/url"
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"os"
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"os/exec"
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"os/user"
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"path/filepath"
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"runtime"
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"testing"
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"time"
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)
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func TestOpen(t *testing.T) {
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if runtime.GOOS == "windows" {
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t.Skip("Can't use Unix sockets on Windows")
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}
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postgresPath, err := exec.LookPath("postgres")
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if err != nil {
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t.Skip("Can't find postgres:", err)
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}
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initdbPath, err := exec.LookPath("initdb")
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if err != nil {
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t.Skip("Can't find initdb:", err)
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}
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// Create a temporary database data directory.
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currUser, err := user.Current()
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if err != nil {
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t.Fatal(err)
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}
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dir, err := ioutil.TempDir("", "gocloud_postgres_test")
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if err != nil {
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t.Fatal(err)
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}
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defer func() {
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if err := os.RemoveAll(dir); err != nil {
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t.Errorf("Cleaning up: %v", err)
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}
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}()
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dataDir := filepath.Join(dir, "data")
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initdbCmd := exec.Command(initdbPath, "-U", currUser.Username, "-D", dataDir)
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initdbOutput := new(bytes.Buffer)
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initdbCmd.Stdout = initdbOutput
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initdbCmd.Stderr = initdbOutput
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err = initdbCmd.Run()
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if err != nil {
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t.Log(initdbOutput)
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t.Fatal(err)
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}
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// Configure the database server to listen on a Unix socket located in the temporary directory.
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socketDir, err := filepath.Abs(filepath.Join(dir, "socket"))
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if err != nil {
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t.Fatal(err)
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}
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if err := os.Mkdir(socketDir, 0777); err != nil {
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t.Fatal(err)
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}
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confData := new(bytes.Buffer)
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fmt.Fprintf(confData, "unix_socket_directories = '%s'\n", socketDir)
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err = ioutil.WriteFile(filepath.Join(dataDir, "postgresql.conf"), confData.Bytes(), 0666)
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if err != nil {
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t.Fatal(err)
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}
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// Start the database server (and arrange for it to be stopped at test end).
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server := exec.Command(postgresPath, "-D", dataDir)
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serverOutput := new(bytes.Buffer)
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server.Stdout = serverOutput
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server.Stderr = serverOutput
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if err := server.Start(); err != nil {
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t.Fatal(err)
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}
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serverSignaled := false
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defer func() {
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if !serverSignaled {
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if err := server.Process.Kill(); err != nil {
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t.Error("Stopping server:", err)
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}
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}
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// Wait for server to exit, but ignore the expected failure error code.
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server.Wait()
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if t.Failed() {
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t.Log(serverOutput)
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}
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}()
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// Now the actual test: can we connect to the database via URL opener?
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ctx := context.Background()
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dbURL := &url.URL{
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Scheme: "blablabla", // Intentionally not "postgres" to ensure any scheme works.
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User: url.User(currUser.Username),
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Path: "/postgres",
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// Use the query parameter to avoid https://github.com/lib/pq/issues/796
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RawQuery: url.Values{"host": {socketDir}}.Encode(),
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}
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t.Logf("PostgreSQL URL: %s", dbURL)
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db, err := new(URLOpener).OpenPostgresURL(ctx, dbURL)
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if err != nil {
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t.Fatal(err)
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}
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// Developing a realistic query would be hard, so instead we trust that the
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// PostgreSQL library reports healthy correctly. Since there's no way to
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// synchronize the server start and the ping, we might have to ping a few
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// times before it is healthy. (The overall test runner timeout will interrupt
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// if this takes too long.)
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for {
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err := db.Ping()
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if err == nil {
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break
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}
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t.Log("Ping:", err)
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time.Sleep(100 * time.Millisecond)
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}
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if err := db.Close(); err != nil {
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t.Error("Close:", err)
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}
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server.Process.Signal(os.Interrupt)
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serverSignaled = true
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}
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