package daemon import ( "encoding/json" "io/ioutil" "os" "path" "path/filepath" "testing" "github.com/docker/docker/container" "github.com/docker/docker/pkg/graphdb" "github.com/docker/docker/pkg/stringid" containertypes "github.com/docker/engine-api/types/container" ) func TestMigrateLegacySqliteLinks(t *testing.T) { tmpDir, err := ioutil.TempDir("", "legacy-qlite-links-test") if err != nil { t.Fatal(err) } defer os.RemoveAll(tmpDir) name1 := "test1" c1 := &container.Container{ CommonContainer: container.CommonContainer{ ID: stringid.GenerateNonCryptoID(), Name: name1, HostConfig: &containertypes.HostConfig{}, }, } c1.Root = tmpDir name2 := "test2" c2 := &container.Container{ CommonContainer: container.CommonContainer{ ID: stringid.GenerateNonCryptoID(), Name: name2, }, } store := &contStore{ s: map[string]*container.Container{ c1.ID: c1, c2.ID: c2, }, } d := &Daemon{root: tmpDir, containers: store} db, err := graphdb.NewSqliteConn(filepath.Join(d.root, "linkgraph.db")) if err != nil { t.Fatal(err) } if _, err := db.Set("/"+name1, c1.ID); err != nil { t.Fatal(err) } if _, err := db.Set("/"+name2, c2.ID); err != nil { t.Fatal(err) } alias := "hello" if _, err := db.Set(path.Join(c1.Name, alias), c2.ID); err != nil { t.Fatal(err) } if err := d.migrateLegacySqliteLinks(db, c1); err != nil { t.Fatal(err) } if len(c1.HostConfig.Links) != 1 { t.Fatal("expected links to be populated but is empty") } expected := name2 + ":" + alias actual := c1.HostConfig.Links[0] if actual != expected { t.Fatalf("got wrong link value, expected: %q, got: %q", expected, actual) } // ensure this is persisted b, err := ioutil.ReadFile(filepath.Join(c1.Root, "hostconfig.json")) if err != nil { t.Fatal(err) } type hc struct { Links []string } var cfg hc if err := json.Unmarshal(b, &cfg); err != nil { t.Fatal(err) } if len(cfg.Links) != 1 { t.Fatalf("expected one entry in links, got: %d", len(cfg.Links)) } if cfg.Links[0] != expected { // same expected as above t.Fatalf("got wrong link value, expected: %q, got: %q", expected, cfg.Links[0]) } }