Setting order when retrieving buckets

pkg/storage/inmemory/inmemory.go

@@ -111,6 +111,12 @@ func (storage *storage) ListObjects(bucket, prefix string, count int) ([]mstorag
 	return results, false, nil
 }
 
+type ByBucketName []mstorage.BucketMetadata
+
+func (b ByBucketName) Len() int           { return len(b) }
+func (b ByBucketName) Swap(i, j int)      { b[i], b[j] = b[j], b[i] }
+func (b ByBucketName) Less(i, j int) bool { return b[i].Name < b[j].Name }
+
 func (storage *storage) ListBuckets(prefix string) ([]mstorage.BucketMetadata, error) {
 	var results []mstorage.BucketMetadata
 	for key, bucket := range storage.bucketdata {
@@ -118,6 +124,7 @@ func (storage *storage) ListBuckets(prefix string) ([]mstorage.BucketMetadata, e
 			results = append(results, bucket.metadata)
 		}
 	}
+	sort.Sort(ByBucketName(results))
 	return results, nil
 }
 

pkg/storage/storage_api_suite.go

@@ -17,6 +17,7 @@ func APITestSuite(c *C, create func() Storage) {
 	testBucketRecreateFails(c, create)
 	testPutObjectInSubdir(c, create)
 	testListBuckets(c, create)
+	testListBucketsOrder(c, create)
 }
 
 func testCreateBucket(c *C, create func() Storage) {
@@ -193,3 +194,18 @@ func testListBuckets(c *C, create func() Storage) {
 	c.Assert(len(buckets), Equals, 2)
 	c.Assert(err, IsNil)
 }
+
+func testListBucketsOrder(c *C, create func() Storage) {
+	for i := 0; i < 10; i++ {
+		storage := create()
+		// add one and test exists
+		storage.StoreBucket("bucket1")
+		storage.StoreBucket("bucket2")
+
+		buckets, err := storage.ListBuckets("bucket")
+		c.Assert(len(buckets), Equals, 2)
+		c.Assert(err, IsNil)
+		c.Assert(buckets[0].Name, Equals, "bucket1")
+		c.Assert(buckets[1].Name, Equals, "bucket2")
+	}
+}

pkg/webapi/minioapi/minioapi_test.go

@@ -23,7 +23,6 @@ import (
 	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
-	"sort"
 	"strconv"
 	"testing"
 	"time"
@@ -323,12 +322,9 @@ func (s *MySuite) TestListBuckets(c *C) {
 	listResponse, err = readListBucket(response.Body)
 	c.Assert(err, IsNil)
 	c.Assert(len(listResponse.Buckets.Bucket), Equals, 2)
-	var buckets []string
-	buckets = append(buckets, listResponse.Buckets.Bucket[0].Name)
-	buckets = append(buckets, listResponse.Buckets.Bucket[1].Name)
-	sort.Strings(buckets)
-	c.Assert(buckets[0], Equals, "bar")
-	c.Assert(buckets[1], Equals, "foo")
+
+	c.Assert(listResponse.Buckets.Bucket[0].Name, Equals, "bar")
+	c.Assert(listResponse.Buckets.Bucket[1].Name, Equals, "foo")
 }
 
 func readListBucket(reader io.Reader) (BucketListResponse, error) {