/
db_test.go
261 lines (229 loc) · 5.55 KB
/
db_test.go
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package gls
import (
"database/sql"
"github.com/bmizerany/pq"
"reflect"
"testing"
"time"
"strings"
)
func openTestDB(t *testing.T) *sql.DB {
cs, err := pq.ParseURL("postgres://localhost:5432/gls_test")
if err != nil {
t.Fatal(err)
}
cs += " sslmode=disable"
db, err := OpenDB(cs)
if err != nil {
t.Fatal(err)
}
return db
}
var sqlCreateTable = `
CREATE TABLE domains (
name text,
deleted boolean,
created_at timestamptz,
txid bigint DEFAULT txid_current()
);`
var sqlCreateView = `
CREATE OR REPLACE VIEW domains_lockstep AS SELECT txid_snapshot_xmin(txid_current_snapshot()) AS current_xmin, name, deleted, txid FROM domains
`
var sqlLoadData = `INSERT into domains ( name, deleted, txid, created_at ) VALUES
('a.com', 'f', 0, '2012-08-27 15:04:23-07'),
('b.com', 'f', 1, NULL),
('c.com', 'f', 2, NULL);
`
var sqlDropGeneratedView = `DROP VIEW IF EXISTS generated_series CASCADE`
func loadTestData(db *sql.DB) (err error) {
tx, err := db.Begin()
if err != nil {
return
}
defer tx.Rollback()
_, err = tx.Exec(sqlCreateTable)
if err != nil {
return
}
_, err = tx.Exec(sqlCreateView)
if err != nil {
return
}
_, err = tx.Exec(sqlLoadData)
if err != nil {
return
}
return tx.Commit()
}
func teardownTestDB(db *sql.DB) error {
_, err := db.Exec("DROP TABLE domains CASCADE")
if err != nil {
return err
}
_, err = db.Exec(sqlDropGeneratedView)
return err
}
func handleTestDBPrep(t *testing.T) *sql.DB {
db := openTestDB(t)
err := loadTestData(db)
if err != nil {
t.Errorf("DB Prep failed: %v", err.Error())
}
return db
}
func teardownAndCloseDB(t *testing.T, db *sql.DB) {
err := teardownTestDB(db)
if err != nil {
t.Fatalf("DB teardown failed: %v", err.Error())
}
db.Close()
return
}
func TestSelect(t *testing.T) {
db := openTestDB(t)
defer db.Close()
var i int
r := db.QueryRow("SELECT 1")
err := r.Scan(&i)
if err != nil {
t.Fatal(err)
}
if i != 1 {
t.Fatalf("SELECT 1 expected: 1, got: %v", i)
}
}
func TestPrep(t *testing.T) {
db := openTestDB(t)
defer db.Close()
err := loadTestData(db)
if err != nil {
t.Errorf("DB Prep failed: %v", err.Error())
}
err = teardownTestDB(db)
if err != nil {
t.Fatalf("DB teardown failed: %v", err.Error())
}
}
func TestGetTable(t *testing.T) {
db := handleTestDBPrep(t)
defer teardownAndCloseDB(t, db)
tables, err := getTables(db)
if err != nil {
t.Errorf("Error from getTables: %v", err.Error())
}
expected := []string{"domains", "domains_lockstep"}
if len(expected) != len(tables) {
t.Fatalf("getTables length mismatch, expected: %i, got: %i", len(expected), len(tables))
}
for i, c := range expected {
if tables[i] != c {
t.Errorf("getTables expected index %i: %s, got: %s", i, c, tables[i])
}
}
}
var domainscolumns = []struct {
name string
datatype reflect.Type
}{
{"name", reflect.TypeOf(new(string))},
{"txid", reflect.TypeOf(new(int64))},
{"deleted", reflect.TypeOf(new(bool))},
}
func TestDescribeTable(t *testing.T) {
db := handleTestDBPrep(t)
defer teardownAndCloseDB(t, db)
tables, _ := getTables(db)
for _, table := range tables {
data, err := describeTable(db, table)
if err != nil {
t.Fatalf("Error from describeTable: %v", err.Error())
}
for i, tt := range domainscolumns {
if data[tt.name] != tt.datatype {
t.Errorf("%d. describeTable(db, %q)[%q] => %q, want %q", i, table, tt.name, data[tt.name], tt.datatype)
}
}
}
}
func TestLoadTables(t *testing.T) {
db := handleTestDBPrep(t)
defer teardownAndCloseDB(t, db)
l := LockstepServer{db: db}
l.loadTables()
if len(l.tables) != 2 {
t.Fatalf("loadTables(), len(l.tables) => %d, want 2", len(l.tables))
}
expected := []string{"domains", "domains_lockstep"}
for name, _ := range l.tables {
success := false
for _, n2 := range expected {
if name == n2 {
success = true
}
}
if !success {
t.Errorf("loadTables() => %q, not included in list", name)
}
}
}
var sqlCreateGeneratedView = `
CREATE OR REPLACE VIEW generated_series AS
SELECT * FROM generate_series(0, 10) AS id;
`
func TestLockstepQueryStop(t *testing.T) {
db := handleTestDBPrep(t)
defer teardownAndCloseDB(t, db)
_, err := db.Exec(sqlCreateGeneratedView)
if err != nil {
t.Fatalf("Error creating generated view: %v", err)
}
l := LockstepServer{db: db}
l.loadTables()
rs := &ResultSet{make(chan map[string]interface{}), make(chan error)}
stopc := make(chan bool)
defer close(stopc)
go l.tables["generated_series"].lockstepQuery(rs, stopc)
stopc <- true
count := 0
for {
select {
case <-rs.Results:
count++
if count > 1 {
t.Errorf("Received too many results, query did not close")
return
}
default:
return
}
}
}
func TestLockstepQueryError(t *testing.T) {
db := handleTestDBPrep(t)
defer teardownAndCloseDB(t, db)
_, err := db.Exec(sqlCreateGeneratedView)
if err != nil {
t.Fatalf("Error creating generated view: %v", err)
}
l := LockstepServer{db: db}
l.loadTables()
// Drop the view before trying to query it, ensuring an error
_, err = db.Exec(sqlDropGeneratedView)
if err != nil {
t.Fatalf("Error dropping generated_series view: %v", err)
}
rs := &ResultSet{make(chan map[string]interface{}), make(chan error)}
stopc := make(chan bool)
defer close(stopc)
go l.tables["generated_series"].lockstepQuery(rs, stopc)
select {
case e := <-rs.Errors:
if !strings.Contains(e.Error(), "does not exist") {
t.Errorf("lockstepQuery returned an unexpected error: %v", e)
}
case r := <-rs.Results:
t.Errorf("lockstepQuery() expected an error, returned a result: %v", r)
case <-time.After(100e6):
t.Errorf("Error expected, none received")
}
}