feat: add pkg to start postgres container
This commit is contained in:
parent
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GPG Key ID:
852BCC170D81A982
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@ -0,0 +1,285 @@
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package database
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import (
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"context"
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"database/sql"
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"errors"
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"fmt"
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"net/url"
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"strconv"
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"strings"
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"testing"
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"time"
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"git.cryptic.systems/volker.raschek/flucky/pkg/testutils/dockerutils"
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"github.com/docker/docker/api/types"
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uuid "github.com/satori/go.uuid"
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"github.com/stretchr/testify/require"
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)
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var (
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ErrInvalidAttr = errors.New("Invalid DatabaseOption attribute")
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)
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type PostgresOptions struct {
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ContainerEnv map[string]string
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ContainerImage string
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ContainerLabels map[string]string
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ContainerName string
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ContainerNetworks map[string][]string
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ContainerNetworkLabels map[string]map[string]string
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ContainerPort string
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Driver string
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DSN string
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HostPort string
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}
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// Validate the DatabaseOption struct, if all required atrributes are valid
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func (dbOptions *PostgresOptions) Validate() error {
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// Required strings
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for _, values := range [][]string{
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0: {"ContainerImage", dbOptions.ContainerImage},
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1: {"ContainerPort", dbOptions.ContainerPort},
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2: {"Driver", dbOptions.Driver},
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3: {"HostPort", dbOptions.HostPort},
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} {
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if len(values[1]) <= 0 {
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return fmt.Errorf("%w: Attribute %v is empty", ErrInvalidAttr, values[0])
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}
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}
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// Require initialized maps
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for key, value := range map[string]interface{}{
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"ContainerEnv": dbOptions.ContainerEnv,
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"ContainerLabels": dbOptions.ContainerLabels,
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"ContainerNetworks": dbOptions.ContainerNetworks,
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"ContainerNetworkLabels": dbOptions.ContainerNetworkLabels,
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} {
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if value == nil {
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return fmt.Errorf("%w: Attribut %v is not initialized", ErrInvalidAttr, key)
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}
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}
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// Required postgres environment variables
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for _, key := range []string{
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"POSTGRES_PASSWORD",
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"POSTGRES_USER",
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"POSTGRES_DB",
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} {
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if _, present := dbOptions.ContainerEnv[key]; !present {
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return fmt.Errorf("%w: Required env %v not defined", ErrInvalidAttr, key)
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}
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}
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// Supported drivers
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found := false
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for _, supportedDriver := range []string{
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"postgres",
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} {
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if supportedDriver == dbOptions.Driver {
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found = true
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break
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}
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}
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if !found {
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return fmt.Errorf("%w: Driver %v not supported", ErrInvalidAttr, dbOptions.Driver)
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}
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// Protect well-known ports
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hostPort, err := strconv.ParseInt(dbOptions.HostPort, 10, 64)
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if err != nil {
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return fmt.Errorf("Failed to parse hostport %v: %w", dbOptions.HostPort, err)
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}
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if hostPort > 0 && hostPort < 1024 {
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return fmt.Errorf("%w: ContainerPort %v: Protect well-known ports between 1-1023", ErrInvalidAttr, dbOptions.HostPort)
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}
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return nil
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}
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// NewPostgresDatabase starts a new postgres database based on default values
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func NewPostgresDatabase(t *testing.T) (*PostgresOptions, func()) {
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return StartPostgres(t, NewPostgresOptions())
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}
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// NewPostgresOptions returns a new PostgresOptions structs with default values
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func NewPostgresOptions() *PostgresOptions {
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return &PostgresOptions{
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ContainerEnv: map[string]string{
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"POSTGRES_PASSWORD": "postgres",
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"POSTGRES_USER": "postgres",
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"POSTGRES_DB": "postgres",
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},
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ContainerImage: "docker.io/library/postgres:13-alpine",
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ContainerLabels: make(map[string]string, 0),
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ContainerName: uuid.NewV4().String(),
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ContainerNetworks: make(map[string][]string, 0),
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ContainerNetworkLabels: make(map[string]map[string]string, 0),
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ContainerPort: "5432",
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Driver: "postgres",
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DSN: "postgres://postgres:postgres@localhost:5432/postgres?sslmode=disable",
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HostPort: "0",
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}
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}
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// StartPostgres starts a postgres container image based on the PostgresOption
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// struct
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func StartPostgres(t *testing.T, pgOptions *PostgresOptions) (*PostgresOptions, func()) {
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var (
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ctx = context.Background()
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require = require.New(t)
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cleanupLabels = map[string]string{
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uuid.NewV4().String(): uuid.NewV4().String(),
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}
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)
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dockerClient, err := dockerutils.New()
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require.NoError(err)
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// Validate the PostgresOptions struct
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require.NoError(pgOptions.Validate())
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// Pre-Define DSN based on the pgOption attributes
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pgOptions.DSN = fmt.Sprintf("postgres://%v:%v@localhost:%v/%v?sslmode=disable",
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pgOptions.ContainerEnv["POSTGRES_USER"],
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pgOptions.ContainerEnv["POSTGRES_PASSWORD"],
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pgOptions.HostPort,
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pgOptions.ContainerEnv["POSTGRES_DB"],
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)
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// Create missing networks
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// The dockerutils package check only if the network exist and append the
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// container with his aliasses as network endpoint. Additionally every network
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// get his own network labels. If no network labels are defined, new labels
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// will be generated. This is required to remove the networks by their labels.
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networks, err := dockerClient.NetworkList(ctx, types.NetworkListOptions{})
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require.NoError(err)
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for networkName := range pgOptions.ContainerNetworks {
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found := false
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for _, network := range networks {
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if network.Name == networkName {
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found = true
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break
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}
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}
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if !found {
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// Create network labels if there are no one defined
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if _, present := pgOptions.ContainerNetworkLabels[networkName]; !present {
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pgOptions.ContainerNetworkLabels[networkName] = make(map[string]string, 0)
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}
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// Append cleanup labels to the network
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for key, value := range cleanupLabels {
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pgOptions.ContainerNetworkLabels[networkName][key] = value
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}
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_, err := dockerClient.NetworkCreate(ctx, networkName, types.NetworkCreate{
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Labels: pgOptions.ContainerNetworkLabels[networkName],
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})
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require.NoError(err)
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}
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}
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// Append cleanup labels to the container
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for key, value := range cleanupLabels {
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pgOptions.ContainerLabels[key] = value
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}
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// Build database container
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databaseContainerBuilder := dockerClient.NewBuilder(pgOptions.ContainerImage).
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Env(pgOptions.ContainerEnv).
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Labels(pgOptions.ContainerLabels).
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Port(fmt.Sprintf("%s:%s", pgOptions.HostPort, pgOptions.ContainerPort)).
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Pull().
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WithName(pgOptions.ContainerName)
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networkNames := make([]string, 0)
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for networkName, aliasses := range pgOptions.ContainerNetworks {
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if aliasses == nil {
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aliasses = make([]string, 0)
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}
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if len(aliasses) <= 0 {
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aliasses = append(aliasses, pgOptions.ContainerName)
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}
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databaseContainerBuilder.Network(networkName, aliasses...)
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pgOptions.ContainerNetworks[networkName] = aliasses
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networkNames = append(networkNames, networkName)
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}
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dbContainerID, err := databaseContainerBuilder.Start(ctx)
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require.NoError(err)
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// cleanupFunction to remove the database container with all defined networks.
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// Skip network if the network has an additional endpoint
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cleanupFunc := func() {
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err := dockerClient.ContainerRemove(ctx, dbContainerID, types.ContainerRemoveOptions{Force: true})
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require.NoError(err)
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for networkName := range pgOptions.ContainerNetworks {
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networks, err := dockerClient.NetworkListByLabels(ctx, pgOptions.ContainerNetworkLabels[networkName])
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require.NoError(err)
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for _, network := range networks {
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if len(network.Containers) <= 0 {
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err := dockerClient.NetworkRemove(ctx, network.ID)
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require.NoError(err)
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}
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}
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}
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}
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// Search for allocated port if public port is defined as random by 0
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if pgOptions.HostPort == "0" {
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containers, err := dockerClient.ContainerListByLabels(ctx, true, pgOptions.ContainerLabels)
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require.NoError(err)
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var pubPort string
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for _, port := range containers[0].Ports {
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if port.PrivatePort == 5432 {
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pubPort = strconv.Itoa(int(port.PublicPort))
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break
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}
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}
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require.Greater(len(pubPort), 0, "Failed to detect allocated random port of the postgres container")
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connectionURL, err := url.Parse(pgOptions.DSN)
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require.NoError(err)
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parts := strings.Split(connectionURL.Host, ":")
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connectionURL.Host = fmt.Sprintf("%v:%v", parts[0], pubPort)
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pgOptions.DSN = connectionURL.String()
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pgOptions.HostPort = pubPort
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}
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var db *sql.DB
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for i := 0; i < 10; i++ {
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db, err = sql.Open(pgOptions.Driver, pgOptions.DSN)
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if err != nil {
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t.Log("Database not ready - wait 10 seconds")
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time.Sleep(10 * time.Second)
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continue
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}
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err = db.Ping()
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if err != nil {
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t.Log("Database not ready - wait 10 seconds")
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db.Close()
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time.Sleep(10 * time.Second)
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continue
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}
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break
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}
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require.NoError(err)
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err = db.Close()
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require.NoError(err)
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return pgOptions, cleanupFunc
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}
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@ -0,0 +1,331 @@
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package database_test
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import (
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"context"
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"database/sql"
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"errors"
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"fmt"
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"testing"
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"git.cryptic.systems/volker.raschek/flucky/pkg/testutils/database"
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"git.cryptic.systems/volker.raschek/flucky/pkg/testutils/dockerutils"
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uuid "github.com/satori/go.uuid"
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"github.com/stretchr/testify/require"
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_ "github.com/lib/pq"
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)
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func requireCountNetworks(ctx context.Context, dockerClient *dockerutils.Client, dbOptions *database.PostgresOptions, equal int, t *testing.T) {
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require := require.New(t)
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containers, err := dockerClient.ContainerListByLabels(ctx, true, dbOptions.ContainerLabels)
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require.NoError(err)
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require.Equal(equal, len(containers[0].NetworkSettings.Networks))
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}
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func requireContainerHasNetworksAndAliasses(ctx context.Context, dockerClient *dockerutils.Client, dbOptions *database.PostgresOptions, t *testing.T) {
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require := require.New(t)
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containers, err := dockerClient.ContainerListByNames(ctx, true, dbOptions.ContainerName)
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require.NoError(err)
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require.Contains(containers[0].Names, fmt.Sprintf("/%v", dbOptions.ContainerName))
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for networkName, _ := range dbOptions.ContainerNetworks {
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networks, err := dockerClient.NetworkListByNames(ctx, networkName)
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require.NoError(err)
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require.Equal(networkName, networks[0].Name)
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require.Equal(dbOptions.ContainerName, networks[0].Containers[containers[0].ID].Name)
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}
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}
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func requireTestCleanup(ctx context.Context, dockerClient *dockerutils.Client, cleanupLabels map[string]string, t *testing.T) {
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require := require.New(t)
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containers, err := dockerClient.ContainerListByLabels(ctx, true, cleanupLabels)
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require.NoError(err)
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require.NotNil(containers)
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require.Len(containers, 0)
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networks, err := dockerClient.NetworkListByLabels(ctx, cleanupLabels)
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require.NoError(err)
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require.NotNil(networks)
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require.Len(networks, 0)
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}
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func TestPostgresDatabase(t *testing.T) {
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require := require.New(t)
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dbOptions, cleanup := database.NewPostgresDatabase(t)
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t.Cleanup(func() { cleanup() })
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require.NotEqual(0, dbOptions.HostPort)
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dockerClient, err := dockerutils.New()
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require.NoError(err)
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dbContainers, err := dockerClient.ContainerListByLabels(context.Background(), true, dbOptions.ContainerLabels)
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require.NoError(err)
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require.NotNil(dbContainers)
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require.Len(dbContainers, 1)
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dbo, err := sql.Open(dbOptions.Driver, dbOptions.DSN)
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require.NoError(err)
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require.NoError(dbo.Ping())
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query := "SELECT 1"
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row := dbo.QueryRow(query)
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var i int
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err = row.Scan(&i)
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require.NoError(err)
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require.Equal(1, i)
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}
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func TestPostgresNetwork(t *testing.T) {
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var (
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ctx = context.Background()
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require = require.New(t)
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cleanupLabels = map[string]string{
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uuid.NewV4().String(): uuid.NewV4().String(),
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}
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)
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dockerClient, err := dockerutils.New()
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require.NoError(err)
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t.Cleanup(func() {
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dockerClient.ContainerRemoveByLabels(ctx, cleanupLabels)
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dockerClient.NetworkRemoveByLabels(ctx, cleanupLabels)
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dockerClient.Close()
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})
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// TestDefaultNetwork
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dbOptionsPointer, cleanup := database.NewPostgresDatabase(t)
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t.Cleanup(cleanup)
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require.NotNil(dbOptionsPointer.ContainerNetworks)
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require.Len(dbOptionsPointer.ContainerNetworks, 0)
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requireContainerHasNetworksAndAliasses(ctx, dockerClient, dbOptionsPointer, t)
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// TestRandomNetwork
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dbOptions := database.NewPostgresOptions()
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dbOptions.HostPort = "0"
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dbOptions.ContainerName = "Volker"
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dbOptions.ContainerLabels = cleanupLabels
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dbOptions.ContainerNetworks[uuid.NewV4().String()] = []string{
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uuid.NewV4().String(),
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uuid.NewV4().String(),
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}
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_, cleanup = database.StartPostgres(t, dbOptions)
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t.Cleanup(cleanup)
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requireCountNetworks(ctx, dockerClient, dbOptions, 1, t)
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requireContainerHasNetworksAndAliasses(ctx, dockerClient, dbOptions, t)
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// TestRandomMultipleNetworks
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containerNetworkNameA := uuid.NewV4().String()
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containerNetworkNameB := uuid.NewV4().String()
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containerNetworks := map[string][]string{
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containerNetworkNameA: {
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uuid.NewV4().String(),
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uuid.NewV4().String(),
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},
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containerNetworkNameB: {
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uuid.NewV4().String(),
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uuid.NewV4().String(),
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},
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}
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containerNetworkLabels := map[string]map[string]string{
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containerNetworkNameA: cleanupLabels,
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containerNetworkNameB: cleanupLabels,
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}
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dbOptions = database.NewPostgresOptions()
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dbOptions.HostPort = "0"
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dbOptions.ContainerName = "Raschek"
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dbOptions.ContainerNetworks = containerNetworks
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dbOptions.ContainerNetworkLabels = containerNetworkLabels
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dbOptions.ContainerLabels = cleanupLabels
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_, cleanup = database.StartPostgres(t, dbOptions)
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t.Cleanup(cleanup)
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requireCountNetworks(ctx, dockerClient, dbOptions, 2, t)
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requireContainerHasNetworksAndAliasses(ctx, dockerClient, dbOptions, t)
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// TestCleanup
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// Test if a network with an additional endpoint will not be removed
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containerNetwork := uuid.NewV4().String()
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containerNetworkA := map[string][]string{
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containerNetwork: {
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uuid.NewV4().String(),
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uuid.NewV4().String(),
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},
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}
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containerNetworkB := map[string][]string{
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containerNetwork: {
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uuid.NewV4().String(),
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uuid.NewV4().String(),
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},
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}
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containerNetworkLabels = map[string]map[string]string{
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containerNetwork: cleanupLabels,
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}
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dbOptions = database.NewPostgresOptions()
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dbOptions.HostPort = "0"
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dbOptions.ContainerName = "is"
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dbOptions.ContainerLabels = cleanupLabels
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dbOptions.ContainerNetworks = containerNetworkA
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dbOptions.ContainerNetworkLabels = containerNetworkLabels
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_, cleanup = database.StartPostgres(t, dbOptions)
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dbOptions = database.NewPostgresOptions()
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dbOptions.HostPort = "0"
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dbOptions.ContainerName = "the_best"
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dbOptions.ContainerLabels = cleanupLabels
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dbOptions.ContainerNetworks = containerNetworkB
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dbOptions.ContainerNetworkLabels = containerNetworkLabels
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_, cleanupSecond := database.StartPostgres(t, dbOptions)
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cleanup()
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networkResources, err := dockerClient.NetworkListByNames(ctx, containerNetwork)
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require.NoError(err)
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require.Len(networkResources[0].Containers, 1)
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cleanupSecond()
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requireTestCleanup(ctx, dockerClient, cleanupLabels, t)
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}
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func TestPostgresOptionsValidate(t *testing.T) {
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require := require.New(t)
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// ContainerImage is empty
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dbOptions := database.PostgresOptions{}
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err := dbOptions.Validate()
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require.Error(err)
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require.True(errors.Is(err, database.ErrInvalidAttr))
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require.EqualError(err, "Invalid DatabaseOption attribute: Attribute ContainerImage is empty")
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// ContainerPort is empty
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dbOptions = database.PostgresOptions{
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ContainerImage: "docker.io/library/postgres:13-alpine",
|
||||
}
|
||||
err = dbOptions.Validate()
|
||||
require.Error(err)
|
||||
require.True(errors.Is(err, database.ErrInvalidAttr))
|
||||
require.EqualError(err, "Invalid DatabaseOption attribute: Attribute ContainerPort is empty")
|
||||
|
||||
// Driver is empty
|
||||
dbOptions = database.PostgresOptions{
|
||||
ContainerImage: "docker.io/library/postgres:13-alpine",
|
||||
ContainerPort: "5432",
|
||||
}
|
||||
err = dbOptions.Validate()
|
||||
require.Error(err)
|
||||
require.True(errors.Is(err, database.ErrInvalidAttr))
|
||||
require.EqualError(err, "Invalid DatabaseOption attribute: Attribute Driver is empty")
|
||||
|
||||
// HostPort is empty
|
||||
dbOptions = database.PostgresOptions{
|
||||
ContainerImage: "docker.io/library/postgres:13-alpine",
|
||||
ContainerPort: "5432",
|
||||
Driver: "sdfsdfsdf",
|
||||
}
|
||||
err = dbOptions.Validate()
|
||||
require.Error(err)
|
||||
require.True(errors.Is(err, database.ErrInvalidAttr))
|
||||
require.EqualError(err, "Invalid DatabaseOption attribute: Attribute HostPort is empty")
|
||||
|
||||
// ContainerEnv: POSTGRES_PASSWORD
|
||||
dbOptions = database.PostgresOptions{
|
||||
ContainerImage: "docker.io/library/postgres:13-alpine",
|
||||
ContainerPort: "5432",
|
||||
Driver: "sdfsdfsdf",
|
||||
HostPort: "asdasd",
|
||||
}
|
||||
err = dbOptions.Validate()
|
||||
require.Error(err)
|
||||
require.True(errors.Is(err, database.ErrInvalidAttr))
|
||||
require.EqualError(err, "Invalid DatabaseOption attribute: Required env POSTGRES_PASSWORD not defined")
|
||||
|
||||
// ContainerEnv: POSTGRES_USER
|
||||
dbOptions = database.PostgresOptions{
|
||||
ContainerEnv: map[string]string{
|
||||
"POSTGRES_PASSWORD": "HelloWorld",
|
||||
},
|
||||
ContainerImage: "docker.io/library/postgres:13-alpine",
|
||||
ContainerPort: "5432",
|
||||
Driver: "sdfsdfsdf",
|
||||
HostPort: "asdasd",
|
||||
}
|
||||
err = dbOptions.Validate()
|
||||
require.Error(err)
|
||||
require.True(errors.Is(err, database.ErrInvalidAttr))
|
||||
require.EqualError(err, "Invalid DatabaseOption attribute: Required env POSTGRES_USER not defined")
|
||||
|
||||
// ContainerEnv: POSTGRES_USER
|
||||
dbOptions = database.PostgresOptions{
|
||||
ContainerEnv: map[string]string{
|
||||
"POSTGRES_PASSWORD": "postgres",
|
||||
"POSTGRES_USER": "postgres",
|
||||
},
|
||||
ContainerImage: "docker.io/library/postgres:13-alpine",
|
||||
ContainerPort: "5432",
|
||||
Driver: "sdfsdfsdf",
|
||||
HostPort: "asdasd",
|
||||
}
|
||||
err = dbOptions.Validate()
|
||||
require.Error(err)
|
||||
require.True(errors.Is(err, database.ErrInvalidAttr))
|
||||
require.EqualError(err, "Invalid DatabaseOption attribute: Required env POSTGRES_DB not defined")
|
||||
|
||||
// Driver not supported
|
||||
dbOptions = database.PostgresOptions{
|
||||
ContainerEnv: map[string]string{
|
||||
"POSTGRES_PASSWORD": "postgres",
|
||||
"POSTGRES_USER": "postgres",
|
||||
"POSTGRES_DB": "postgres",
|
||||
},
|
||||
ContainerImage: "docker.io/library/postgres:13-alpine",
|
||||
ContainerPort: "5432",
|
||||
Driver: "sdfsdfsdf",
|
||||
HostPort: "asdasd",
|
||||
}
|
||||
err = dbOptions.Validate()
|
||||
require.Error(err)
|
||||
require.True(errors.Is(err, database.ErrInvalidAttr))
|
||||
require.EqualError(err, "Invalid DatabaseOption attribute: Driver sdfsdfsdf not supported")
|
||||
|
||||
// HostPort: Failed to parse
|
||||
dbOptions = database.PostgresOptions{
|
||||
ContainerEnv: map[string]string{
|
||||
"POSTGRES_PASSWORD": "postgres",
|
||||
"POSTGRES_USER": "postgres",
|
||||
"POSTGRES_DB": "postgres",
|
||||
},
|
||||
ContainerImage: "docker.io/library/postgres:13-alpine",
|
||||
ContainerPort: "5432",
|
||||
Driver: "postgres",
|
||||
HostPort: "asdasd",
|
||||
}
|
||||
err = dbOptions.Validate()
|
||||
require.Error(err)
|
||||
require.EqualError(err, "Failed to parse hostport asdasd: strconv.ParseInt: parsing \"asdasd\": invalid syntax")
|
||||
|
||||
// HostPort: Well-Known port
|
||||
dbOptions = database.PostgresOptions{
|
||||
ContainerEnv: map[string]string{
|
||||
"POSTGRES_PASSWORD": "postgres",
|
||||
"POSTGRES_USER": "postgres",
|
||||
"POSTGRES_DB": "postgres",
|
||||
},
|
||||
ContainerImage: "docker.io/library/postgres:13-alpine",
|
||||
ContainerPort: "5432",
|
||||
Driver: "postgres",
|
||||
HostPort: "443",
|
||||
}
|
||||
err = dbOptions.Validate()
|
||||
require.Error(err)
|
||||
require.EqualError(err, "Invalid DatabaseOption attribute: ContainerPort 443: Protect well-known ports between 1-1023")
|
||||
}
|
||||
|
|
@ -31,7 +31,8 @@ func (client *Client) Close() error {
|
|||
if client.watcher != nil {
|
||||
client.watcher.stop()
|
||||
}
|
||||
return client.Close()
|
||||
|
||||
return client.Client.Close()
|
||||
}
|
||||
|
||||
// ContainerListByLabels returns only containers which match by given labels
|
||||
|
|
|
|||
Loading…
Reference in New Issue