Merge pull request #74 from fkautz/pr_out_adding_more_tests_including_ordering_of_objects_in_prefix

pkg/storage/inmemory/inmemory.go

@@ -5,6 +5,7 @@ import (
 	"crypto/sha256"
 	"fmt"
 	"io"
+	"sort"
 	"strings"
 	"time"
 
@@ -89,10 +90,18 @@ func (storage *storage) StoreBucket(bucketName string) error {
 func (storage *storage) ListObjects(bucket, prefix string, count int) ([]mstorage.ObjectMetadata, bool, error) {
 	// TODO prefix and count handling
 	var results []mstorage.ObjectMetadata
-	for key, object := range storage.objectdata {
+	var keys []string
+	for key := range storage.objectdata {
+		if strings.HasPrefix(key, bucket+":"+prefix) {
+			keys = append(keys, key)
+		}
+	}
+	sort.Strings(keys)
+	for _, key := range keys {
 		if len(results) == count {
 			return results, true, nil
 		}
+		object := storage.objectdata[key]
 		if bucket == object.metadata.Bucket {
 			if strings.HasPrefix(key, bucket+":") {
 				results = append(results, object.metadata)

pkg/storage/storage_api_suite.go

@@ -25,7 +25,7 @@ func testMultipleObjectCreation(c *C, create func() Storage) {
 	objects := make(map[string][]byte)
 	storage := create()
 	err := storage.StoreBucket("bucket")
-	c.Check(err, IsNil)
+	c.Assert(err, IsNil)
 	for i := 0; i < 10; i++ {
 		randomPerm := rand.Perm(10)
 		randomString := ""
@@ -35,22 +35,22 @@ func testMultipleObjectCreation(c *C, create func() Storage) {
 		key := "obj" + strconv.Itoa(i)
 		objects[key] = []byte(randomString)
 		err := storage.StoreObject("bucket", key, bytes.NewBufferString(randomString))
-		c.Check(err, IsNil)
+		c.Assert(err, IsNil)
 	}
 
-	// ensure no duplicates
+	// ensure no duplicate etags
 	etags := make(map[string]string)
 	for key, value := range objects {
 		var byteBuffer bytes.Buffer
 		storage.CopyObjectToWriter(&byteBuffer, "bucket", key)
-		c.Check(bytes.Equal(value, byteBuffer.Bytes()), Equals, true)
+		c.Assert(bytes.Equal(value, byteBuffer.Bytes()), Equals, true)
 
 		metadata, err := storage.GetObjectMetadata("bucket", key)
-		c.Check(err, IsNil)
-		c.Check(metadata.Size, Equals, int64(len(value)))
+		c.Assert(err, IsNil)
+		c.Assert(metadata.Size, Equals, int64(len(value)))
 
 		_, ok := etags[metadata.ETag]
-		c.Check(ok, Equals, false)
+		c.Assert(ok, Equals, false)
 		etags[metadata.ETag] = metadata.ETag
 	}
 }
@@ -60,24 +60,58 @@ func testPaging(c *C, create func() Storage) {
 	storage.StoreBucket("bucket")
 	storage.ListObjects("bucket", "", 5)
 	objects, isTruncated, err := storage.ListObjects("bucket", "", 5)
-	c.Check(len(objects), Equals, 0)
-	c.Check(isTruncated, Equals, false)
-	c.Check(err, IsNil)
-	for i := 1; i <= 5; i++ {
+	c.Assert(len(objects), Equals, 0)
+	c.Assert(isTruncated, Equals, false)
+	c.Assert(err, IsNil)
+	// check before paging occurs
+	for i := 0; i < 5; i++ {
 		key := "obj" + strconv.Itoa(i)
 		storage.StoreObject("bucket", key, bytes.NewBufferString(key))
 		objects, isTruncated, err = storage.ListObjects("bucket", "", 5)
-		c.Check(len(objects), Equals, i)
-		c.Check(isTruncated, Equals, false)
-		c.Check(err, IsNil)
+		c.Assert(len(objects), Equals, i+1)
+		c.Assert(isTruncated, Equals, false)
+		c.Assert(err, IsNil)
 	}
+	// check after paging occurs pages work
 	for i := 6; i <= 10; i++ {
 		key := "obj" + strconv.Itoa(i)
 		storage.StoreObject("bucket", key, bytes.NewBufferString(key))
 		objects, isTruncated, err = storage.ListObjects("bucket", "", 5)
-		c.Check(len(objects), Equals, 5)
-		c.Check(isTruncated, Equals, true)
-		c.Check(err, IsNil)
+		c.Assert(len(objects), Equals, 5)
+		c.Assert(isTruncated, Equals, true)
+		c.Assert(err, IsNil)
+	}
+	// check paging with prefix at end returns less objects
+	{
+		storage.StoreObject("bucket", "newPrefix", bytes.NewBufferString("prefix1"))
+		storage.StoreObject("bucket", "newPrefix2", bytes.NewBufferString("prefix2"))
+		objects, isTruncated, err = storage.ListObjects("bucket", "new", 5)
+		c.Assert(len(objects), Equals, 2)
+	}
+
+	// check ordering of pages
+	{
+		objects, isTruncated, err = storage.ListObjects("bucket", "", 5)
+		c.Assert(objects[0].Key, Equals, "newPrefix")
+		c.Assert(objects[1].Key, Equals, "newPrefix2")
+		c.Assert(objects[2].Key, Equals, "obj0")
+		c.Assert(objects[3].Key, Equals, "obj1")
+		c.Assert(objects[4].Key, Equals, "obj10")
+	}
+	// check ordering of results with prefix
+	{
+		objects, isTruncated, err = storage.ListObjects("bucket", "obj", 5)
+		c.Assert(objects[0].Key, Equals, "obj0")
+		c.Assert(objects[1].Key, Equals, "obj1")
+		c.Assert(objects[2].Key, Equals, "obj10")
+		c.Assert(objects[3].Key, Equals, "obj2")
+		c.Assert(objects[4].Key, Equals, "obj3")
+	}
+	// check ordering of results with prefix and no paging
+	{
+		objects, isTruncated, err = storage.ListObjects("bucket", "new", 5)
+		c.Assert(objects[0].Key, Equals, "newPrefix")
+		c.Assert(objects[1].Key, Equals, "newPrefix2")
 	}
 }
 
@@ -85,26 +119,26 @@ func testObjectOverwriteFails(c *C, create func() Storage) {
 	storage := create()
 	storage.StoreBucket("bucket")
 	err := storage.StoreObject("bucket", "object", bytes.NewBufferString("one"))
-	c.Check(err, IsNil)
+	c.Assert(err, IsNil)
 	err = storage.StoreObject("bucket", "object", bytes.NewBufferString("three"))
-	c.Check(err, Not(IsNil))
+	c.Assert(err, Not(IsNil))
 	var bytesBuffer bytes.Buffer
 	length, err := storage.CopyObjectToWriter(&bytesBuffer, "bucket", "object")
-	c.Check(length, Equals, int64(len("one")))
-	c.Check(err, IsNil)
-	c.Check(string(bytesBuffer.Bytes()), Equals, "one")
+	c.Assert(length, Equals, int64(len("one")))
+	c.Assert(err, IsNil)
+	c.Assert(string(bytesBuffer.Bytes()), Equals, "one")
 }
 
 func testNonExistantBucketOperations(c *C, create func() Storage) {
 	storage := create()
 	err := storage.StoreObject("bucket", "object", bytes.NewBufferString("one"))
-	c.Check(err, Not(IsNil))
+	c.Assert(err, Not(IsNil))
 }
 
 func testBucketRecreateFails(c *C, create func() Storage) {
 	storage := create()
 	err := storage.StoreBucket("string")
-	c.Check(err, IsNil)
+	c.Assert(err, IsNil)
 	err = storage.StoreBucket("string")
-	c.Check(err, Not(IsNil))
+	c.Assert(err, Not(IsNil))
 }