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testing.go
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testing.go
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package gateway
import (
"database/sql"
"fmt"
"github.com/benalexau/ibconnect/core"
"github.com/gofinance/ib"
"sync"
"testing"
"time"
)
// TestFeedContext supports writing tests that require a FeedContext.
type TestFeedContext struct {
closed sync.Once
ctx *core.Context
FC *FeedContext
}
// NewTestFeedContext provides a simple way of producing a FeedContext for tests.
func NewTestFeedContext(t *testing.T) *TestFeedContext {
c := core.NewTestConfig(t)
ctx, err := core.NewContext(c)
if err != nil {
t.Fatal(err)
}
engine, err := ib.NewEngine(ib.NewEngineOptions{Gateway: c.IbGws[0]})
if err != nil {
t.Fatal(err)
}
fc := &FeedContext{
Errors: make(chan FeedError),
DB: ctx.DB,
N: ctx.N,
Eng: engine,
}
return &TestFeedContext{
ctx: ctx,
FC: fc,
}
}
func (f *TestFeedContext) Close() {
f.closed.Do(func() {
if f.FC.Eng != nil {
defer f.FC.Eng.Stop()
}
defer f.ctx.Close()
})
}
func Count(t *testing.T, db *sql.DB, table string) int {
count := 0
query := fmt.Sprintf("SELECT COUNT(*) FROM %s", table)
row := db.QueryRow(query)
if err := row.Scan(&count); err != nil {
t.Fatal(err)
}
return count
}
// TestSimpleFeedInsertsDataOnStartup ensures the Feed will grow the table before timeout.
// The table must grow by at least one row. Any error will fail the test.
func TestSimpleFeedInsertsDataOnStartup(t *testing.T, ff *FeedFactory, table string, timeout time.Duration) {
tfc := NewTestFeedContext(t)
defer tfc.Close()
before := Count(t, tfc.FC.DB, table)
feed := (*ff).NewFeed(tfc.FC)
defer (*feed).Close()
kill := time.Now().Add(timeout)
for {
select {
case err := <-tfc.FC.Errors:
t.Fatal(err)
return
default:
count := Count(t, tfc.FC.DB, table)
if count >= before+1 {
return
}
if time.Now().After(kill) {
t.Fatalf("Table %s did not update in time (was %d; now %d)", table, before, count)
return
}
time.Sleep(50 * time.Millisecond)
}
}
}
// TestSimpleFeedHandlesEngineTermination ensures the Feed will detect Engine failures.
// The Feed must report an error before the timeout.
func TestSimpleFeedHandlesEngineTermination(t *testing.T, ff *FeedFactory, timeout time.Duration) {
tfc := NewTestFeedContext(t)
defer tfc.Close()
tfc.FC.Eng.Stop()
feed := (*ff).NewFeed(tfc.FC)
defer (*feed).Close()
for {
select {
case <-tfc.FC.Errors:
return
case <-time.After(timeout):
t.Fatal("Timeout reached and engine failure never reported")
}
}
}
// TestSimpleFeedHandlesNoEngine ensures the Feed will detect a missing Engine.
// The Feed must report an error within 1 second of being started.
func TestSimpleFeedHandlesNoEngine(t *testing.T, ff *FeedFactory) {
tfc := NewTestFeedContext(t)
defer tfc.Close()
tfc.FC.Eng = nil
feed := (*ff).NewFeed(tfc.FC)
defer (*feed).Close()
for {
select {
case <-tfc.FC.Errors:
return
case <-time.After(1 * time.Second):
t.Fatal("Timeout reached and engine nil never reported")
}
}
}
// TestSimpleFeedPublishesDoneMessage ensures the Feed will report it is done.
func TestSimpleFeedPublishesDoneMessage(t *testing.T, ff *FeedFactory, timeout time.Duration) {
tfc := NewTestFeedContext(t)
defer tfc.Close()
feed := (*ff).NewFeed(tfc.FC)
defer (*feed).Close()
notifications := make(chan *core.Notification)
tfc.FC.N.Subscribe(notifications)
defer tfc.FC.N.Unsubscribe(notifications)
for {
select {
case err := <-tfc.FC.Errors:
t.Fatal(err)
return
case event := <-notifications:
if event.Type == (*ff).Done() {
return
}
case <-time.After(timeout):
t.Fatal("Timeout reached and feed never reported as done")
}
}
}