func TestBasicRW(t *testing.T) {
store := testutils.CreateStore(t)
testutils.Clearstore(t, store)
//
//Create a new object and write to it.
//
obj, err := store.NewObject("prefix/test.csv")
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertT(t, obj != nil, "Should return new empty obj")
f, err := obj.Open(cloudstorage.ReadWrite)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertT(t, f != nil, "the file was nil")
testcsv := "Year,Make,Model\n1997,Ford,E350\n2000,Mercury,Cougar\n"
w := bufio.NewWriter(f)
n, err := w.WriteString(testcsv)
testutils.AssertEq(t, nil, err, "error. %d", n)
w.Flush()
err = obj.Close()
testutils.AssertEq(t, nil, err, "error.")
//
//Read the object back out of the cloud storage.
//
obj2, err := store.Get("prefix/test.csv")
testutils.AssertEq(t, nil, err, "error.")
f2, err := obj2.Open(cloudstorage.ReadOnly)
testutils.AssertEq(t, nil, err, "error.")
bytes, err := ioutil.ReadAll(f2)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertEq(t, testcsv, string(bytes))
}
func TestListObjs(t *testing.T) {
store := testutils.CreateStore(t)
testutils.Clearstore(t, store)
//
//Create 20 objects
//
names := []string{}
for i := 0; i < 20; i++ {
n := fmt.Sprintf("list-test/test%d.csv", i)
names = append(names, n)
}
sort.Strings(names)
for _, n := range names {
obj, err := store.NewObject(n)
testutils.AssertEq(t, nil, err, "error. %v", obj)
f1, err := obj.Open(cloudstorage.ReadWrite)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertT(t, f1 != nil, "the file was nil")
testcsv := "12345\n"
w1 := bufio.NewWriter(f1)
n1, err := w1.WriteString(testcsv)
testutils.AssertEq(t, nil, err, "error. %d", n1)
w1.Flush()
err = obj.Close()
testutils.AssertEq(t, nil, err, "error.")
}
q := cloudstorage.Query{"list-test/", nil}
q.Sorted()
objs, err := store.List(q)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertEq(t, 20, len(objs), "incorrect list len.")
for i, o := range objs {
//t.Logf("%i found %v", i, o.Name())
testutils.AssertEq(t, names[i], o.Name(), "unexpected name.")
}
}
func TestNewObjectWithExisting(t *testing.T) {
store := testutils.CreateStore(t)
testutils.Clearstore(t, store)
//
//Create a new object and write to it.
//
obj, err := store.NewObject("test.csv")
testutils.AssertEq(t, nil, err, "error.")
f, err := obj.Open(cloudstorage.ReadWrite)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertT(t, f != nil, "the file was nil")
testcsv := "Year,Make,Model\n2003,VW,EuroVan\n2001,Ford,Ranger\n"
w := bufio.NewWriter(f)
n, err := w.WriteString(testcsv)
testutils.AssertEq(t, nil, err, "error. %d", n)
w.Flush()
err = obj.Close()
testutils.AssertEq(t, nil, err, "error.")
//
// Ensure calling NewObject on an existing object returns an error,
// because the object exits.
//
obj2, err := store.NewObject("test.csv")
testutils.AssertEq(t, cloudstorage.ObjectExists, err, "error.")
testutils.AssertEq(t, nil, obj2, "object shoudl be nil.")
//
//Read the object back out of the cloud storage.
//
obj3, err := store.Get("test.csv")
testutils.AssertEq(t, nil, err, "error.")
f3, err := obj3.Open(cloudstorage.ReadOnly)
testutils.AssertEq(t, nil, err, "error.")
bytes, err := ioutil.ReadAll(f3)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertEq(t, testcsv, string(bytes))
}
func TestAppend(t *testing.T) {
store := testutils.CreateStore(t)
testutils.Clearstore(t, store)
now := time.Now()
time.Sleep(10 * time.Millisecond)
//
//Create a new object and write to it.
//
obj, err := store.NewObject("test.csv")
testutils.AssertEq(t, nil, err, "error.")
f1, err := obj.Open(cloudstorage.ReadWrite)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertT(t, f1 != nil, "the file was nil")
testcsv := "Year,Make,Model\n2003,VW,EuroVan\n2001,Ford,Ranger\n"
w1 := bufio.NewWriter(f1)
n1, err := w1.WriteString(testcsv)
testutils.AssertEq(t, nil, err, "error. %d", n1)
w1.Flush()
err = obj.Close()
testutils.AssertEq(t, nil, err, "error.")
//
//get the object and append to it...
//
morerows := "2013,VW,Jetta\n2011,Dodge,Caravan\n"
obj2, err := store.Get("test.csv")
testutils.AssertEq(t, nil, err, "error.")
// get updated time
updated := obj2.Updated()
testutils.AssertT(t, updated.After(now), "updated time was not set")
time.Sleep(10 * time.Millisecond)
f2, err := obj2.Open(cloudstorage.ReadWrite)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertT(t, f2 != nil, "the file was nil")
w2 := bufio.NewWriter(f2)
n2, err := w2.WriteString(morerows)
testutils.AssertEq(t, nil, err, "error. %d", n2)
w2.Flush()
err = obj2.Close()
testutils.AssertEq(t, nil, err, "error.")
//
//Read the object back out of the cloud storage.
//
obj3, err := store.Get("test.csv")
testutils.AssertEq(t, nil, err, "error.")
updated3 := obj3.Updated()
testutils.AssertT(t, updated3.After(updated), "updated time not updated")
f3, err := obj3.Open(cloudstorage.ReadOnly)
testutils.AssertEq(t, nil, err, "error.")
bytes, err := ioutil.ReadAll(f3)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertEq(t, testcsv+morerows, string(bytes), "not the rows we expected.")
}
func TestTruncate(t *testing.T) {
store := testutils.CreateStore(t)
testutils.Clearstore(t, store)
//
//Create a new object and write to it.
//
obj, err := store.NewObject("test.csv")
testutils.AssertEq(t, nil, err, "error.")
f1, err := obj.Open(cloudstorage.ReadWrite)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertT(t, f1 != nil, "the file was nil")
testcsv := "Year,Make,Model\n2003,VW,EuroVan\n2001,Ford,Ranger\n"
w1 := bufio.NewWriter(f1)
n1, err := w1.WriteString(testcsv)
testutils.AssertEq(t, nil, err, "error. %d", n1)
w1.Flush()
err = obj.Close()
testutils.AssertEq(t, nil, err, "error.")
//
//get the object and replace it...
//
newtestcsv := "Year,Make,Model\n2013,VW,Jetta\n"
obj2, err := store.Get("test.csv")
testutils.AssertEq(t, nil, err, "error.")
f2, err := obj2.Open(cloudstorage.ReadWrite)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertT(t, f2 != nil, "the file was nil")
// Truncating the file will zero out the file
f2.Truncate(0)
// We also want to start writing from the beginning of the file
f2.Seek(0, 0)
w2 := bufio.NewWriter(f2)
n2, err := w2.WriteString(newtestcsv)
testutils.AssertEq(t, nil, err, "error. %d", n2)
w2.Flush()
err = obj2.Close()
testutils.AssertEq(t, nil, err, "error.")
//
//Read the object back out of the cloud storage.
//
obj3, err := store.Get("test.csv")
testutils.AssertEq(t, nil, err, "error.")
f3, err := obj3.Open(cloudstorage.ReadOnly)
testutils.AssertEq(t, nil, err, "error.")
bytes, err := ioutil.ReadAll(f3)
testutils.AssertEq(t, nil, err, "error.")
testutils.AssertEq(t, newtestcsv, string(bytes), "not the rows we expected.")
}