/*
 * Minio Cloud Storage, (C) 2016 Minio, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package main

import (
	"bytes"
	"errors"
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"strconv"
	"testing"
)

// Authenticate and get JWT token - will be called before every webrpc handler invocation
func getWebRPCToken(apiRouter http.Handler, accessKey, secretKey string) (token string, err error) {
	rec := httptest.NewRecorder()
	request := LoginArgs{Username: accessKey, Password: secretKey}
	reply := &LoginRep{}
	req, err := newTestWebRPCRequest("Web.Login", "", request)
	if err != nil {
		return "", err
	}
	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		return "", errors.New("Auth failed")
	}
	err = getTestWebRPCResponse(rec, &reply)
	if err != nil {
		return "", err
	}
	if reply.Token == "" {
		return "", errors.New("Auth failed")
	}
	return reply.Token, nil
}

// Wrapper for calling Login Web Handler
func TestWebHandlerLogin(t *testing.T) {
	ExecObjectLayerTest(t, testLoginWebHandler)
}

// testLoginWebHandler - Test login web handler
func testLoginWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	// test cases with sample input and expected output.
	testCases := []struct {
		username string
		password string
		success  bool
	}{
		{"", "", false},
		{"azerty", "foo", false},
		{"", "foo", false},
		{"azerty", "", false},
		{"azerty", "foo", false},
		{credentials.AccessKeyID, credentials.SecretAccessKey, true},
	}

	// Iterating over the test cases, calling the function under test and asserting the response.
	for i, testCase := range testCases {
		_, err := getWebRPCToken(apiRouter, testCase.username, testCase.password)
		if err != nil && testCase.success {
			t.Fatalf("Test %d: Expected to succeed but it failed, %v", i+1, err)
		}
		if err == nil && !testCase.success {
			t.Fatalf("Test %d: Expected to fail but it didn't, %v", i+1, err)
		}

	}
}

// Wrapper for calling StorageInfo Web Handler
func TestWebHandlerStorageInfo(t *testing.T) {
	ExecObjectLayerTest(t, testStorageInfoWebHandler)
}

// testStorageInfoWebHandler - Test StorageInfo web handler
func testStorageInfoWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// get random bucket name.
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	rec := httptest.NewRecorder()

	storageInfoRequest := GenericArgs{}
	storageInfoReply := &StorageInfoRep{}
	req, err := newTestWebRPCRequest("Web.StorageInfo", authorization, storageInfoRequest)
	if err != nil {
		t.Fatalf("Failed to create HTTP request: <ERROR> %v", err)
	}
	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("Expected the response status to be 200, but instead found `%d`", rec.Code)
	}
	err = getTestWebRPCResponse(rec, &storageInfoReply)
	if err != nil {
		t.Fatalf("Failed %v", err)
	}
	if storageInfoReply.StorageInfo.Total <= 0 {
		t.Fatalf("Got a zero or negative total free space disk")
	}
}

// Wrapper for calling ServerInfo Web Handler
func TestWebHandlerServerInfo(t *testing.T) {
	ExecObjectLayerTest(t, testServerInfoWebHandler)
}

// testServerInfoWebHandler - Test ServerInfo web handler
func testServerInfoWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	rec := httptest.NewRecorder()

	serverInfoRequest := GenericArgs{}
	serverInfoReply := &ServerInfoRep{}
	req, err := newTestWebRPCRequest("Web.ServerInfo", authorization, serverInfoRequest)
	if err != nil {
		t.Fatalf("Failed to create HTTP request: <ERROR> %v", err)
	}
	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("Expected the response status to be 200, but instead found `%d`", rec.Code)
	}
	err = getTestWebRPCResponse(rec, &serverInfoReply)
	if err != nil {
		t.Fatalf("Failed, %v", err)
	}
	if serverInfoReply.MinioVersion != minioVersion {
		t.Fatalf("Cannot get minio version from server info handler")
	}
}

// Wrapper for calling MakeBucket Web Handler
func TestWebHandlerMakeBucket(t *testing.T) {
	ExecObjectLayerTest(t, testMakeBucketWebHandler)
}

// testMakeBucketWebHandler - Test MakeBucket web handler
func testMakeBucketWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	rec := httptest.NewRecorder()

	bucketName := getRandomBucketName()

	testCases := []struct {
		bucketName string
		success    bool
	}{
		{"", false},
		{".", false},
		{"ab", false},
		{bucketName, true},
	}

	for i, testCase := range testCases {
		makeBucketRequest := MakeBucketArgs{BucketName: testCase.bucketName}
		makeBucketReply := &WebGenericRep{}
		req, err := newTestWebRPCRequest("Web.MakeBucket", authorization, makeBucketRequest)
		if err != nil {
			t.Fatalf("Test %d: Failed to create HTTP request: <ERROR> %v", i+1, err)
		}
		apiRouter.ServeHTTP(rec, req)
		if rec.Code != http.StatusOK {
			t.Fatalf("Test %d: Expected the response status to be 200, but instead found `%d`", i+1, rec.Code)
		}
		err = getTestWebRPCResponse(rec, &makeBucketReply)
		if testCase.success && err != nil {
			t.Fatalf("Test %d: Should succeed but it didn't, %v", i+1, err)
		}
		if !testCase.success && err == nil {
			t.Fatalf("Test %d: Should fail but it didn't (%s)", i+1, testCase.bucketName)
		}
	}
}

// Wrapper for calling ListBuckets Web Handler
func TestWebHandlerListBuckets(t *testing.T) {
	ExecObjectLayerTest(t, testListBucketsWebHandler)
}

// testListBucketsHandler - Test ListBuckets web handler
func testListBucketsWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	rec := httptest.NewRecorder()

	bucketName := getRandomBucketName()
	// Create bucket.
	err = obj.MakeBucket(bucketName)
	if err != nil {
		// failed to create newbucket, abort.
		t.Fatalf("%s : %s", instanceType, err)
	}

	listBucketsRequest := WebGenericArgs{}
	listBucketsReply := &ListBucketsRep{}
	req, err := newTestWebRPCRequest("Web.ListBuckets", authorization, listBucketsRequest)
	if err != nil {
		t.Fatalf("Failed to create HTTP request: <ERROR> %v", err)
	}
	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("Expected the response status to be 200, but instead found `%d`", rec.Code)
	}
	err = getTestWebRPCResponse(rec, &listBucketsReply)
	if err != nil {
		t.Fatalf("Failed, %v", err)
	}
	if len(listBucketsReply.Buckets) == 0 {
		t.Fatalf("Cannot find the bucket already created by MakeBucket")
	}
	if listBucketsReply.Buckets[0].Name != bucketName {
		t.Fatalf("Found another bucket other than already created by MakeBucket")
	}
}

// Wrapper for calling ListObjects Web Handler
func TestWebHandlerListObjects(t *testing.T) {
	ExecObjectLayerTest(t, testListObjectsWebHandler)
}

// testListObjectsHandler - Test ListObjects web handler
func testListObjectsWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	rec := httptest.NewRecorder()

	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	bucketName := getRandomBucketName()
	objectName := "object"
	objectSize := 1024

	// Create bucket.
	err = obj.MakeBucket(bucketName)
	if err != nil {
		// failed to create newbucket, abort.
		t.Fatalf("%s : %s", instanceType, err)
	}

	data := bytes.Repeat([]byte("a"), objectSize)

	_, err = obj.PutObject(bucketName, objectName, int64(len(data)), bytes.NewReader(data), map[string]string{"md5Sum": "c9a34cfc85d982698c6ac89f76071abd"})

	if err != nil {
		t.Fatalf("Was not able to upload an object, %v", err)
	}

	listObjectsRequest := ListObjectsArgs{BucketName: bucketName, Prefix: ""}
	listObjectsReply := &ListObjectsRep{}
	req, err := newTestWebRPCRequest("Web.ListObjects", authorization, listObjectsRequest)
	if err != nil {
		t.Fatalf("Failed to create HTTP request: <ERROR> %v", err)
	}
	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("Expected the response status to be 200, but instead found `%d`", rec.Code)
	}
	err = getTestWebRPCResponse(rec, &listObjectsReply)
	if err != nil {
		t.Fatalf("Failed, %v", err)
	}
	if len(listObjectsReply.Objects) == 0 {
		t.Fatalf("Cannot find the object")
	}
	if listObjectsReply.Objects[0].Key != objectName {
		t.Fatalf("Found another object other than already created by PutObject")
	}
	if listObjectsReply.Objects[0].Size != int64(objectSize) {
		t.Fatalf("Found a object with the same name but with a different size")
	}

}

// Wrapper for calling RemoveObject Web Handler
func TestWebHandlerRemoveObject(t *testing.T) {
	ExecObjectLayerTest(t, testRemoveObjectWebHandler)
}

// testRemoveObjectWebHandler - Test RemoveObject web handler
func testRemoveObjectWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	rec := httptest.NewRecorder()
	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	bucketName := getRandomBucketName()
	objectName := "object"
	objectSize := 1024

	// Create bucket.
	err = obj.MakeBucket(bucketName)
	if err != nil {
		// failed to create newbucket, abort.
		t.Fatalf("%s : %s", instanceType, err)
	}

	data := bytes.Repeat([]byte("a"), objectSize)

	_, err = obj.PutObject(bucketName, objectName, int64(len(data)), bytes.NewReader(data), map[string]string{"md5Sum": "c9a34cfc85d982698c6ac89f76071abd"})

	if err != nil {
		t.Fatalf("Was not able to upload an object, %v", err)
	}

	removeObjectRequest := RemoveObjectArgs{BucketName: bucketName, ObjectName: objectName}
	removeObjectReply := &WebGenericRep{}
	req, err := newTestWebRPCRequest("Web.RemoveObject", authorization, removeObjectRequest)
	if err != nil {
		t.Fatalf("Failed to create HTTP request: <ERROR> %v", err)
	}
	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("Expected the response status to be 200, but instead found `%d`", rec.Code)
	}
	err = getTestWebRPCResponse(rec, &removeObjectReply)
	if err != nil {
		t.Fatalf("Failed, %v", err)
	}
}

// Wrapper for calling Generate Auth Handler
func TestWebHandlerGenerateAuth(t *testing.T) {
	ExecObjectLayerTest(t, testGenerateAuthWebHandler)
}

// testGenerateAuthWebHandler - Test GenerateAuth web handler
func testGenerateAuthWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	rec := httptest.NewRecorder()
	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	generateAuthRequest := WebGenericArgs{}
	generateAuthReply := &GenerateAuthReply{}
	req, err := newTestWebRPCRequest("Web.GenerateAuth", authorization, generateAuthRequest)
	if err != nil {
		t.Fatalf("Failed to create HTTP request: <ERROR> %v", err)
	}
	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("Expected the response status to be 200, but instead found `%d`", rec.Code)
	}
	err = getTestWebRPCResponse(rec, &generateAuthReply)
	if err != nil {
		t.Fatalf("Failed, %v", err)
	}

	if generateAuthReply.AccessKey == "" || generateAuthReply.SecretKey == "" {
		t.Fatalf("Failed to generate auth keys")
	}
}

// Wrapper for calling Set Auth Handler
func TestWebHandlerSetAuth(t *testing.T) {
	ExecObjectLayerTest(t, testSetAuthWebHandler)
}

// testSetAuthWebHandler - Test SetAuth web handler
func testSetAuthWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	rec := httptest.NewRecorder()
	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	testCases := []struct {
		username string
		password string
		success  bool
	}{
		{"", "", false},
		{"azerty", "foooooooooooooo", true},
	}

	// Iterating over the test cases, calling the function under test and asserting the response.
	for i, testCase := range testCases {

		setAuthRequest := SetAuthArgs{AccessKey: testCase.username, SecretKey: testCase.password}
		setAuthReply := &SetAuthReply{}
		req, err := newTestWebRPCRequest("Web.SetAuth", authorization, setAuthRequest)
		if err != nil {
			t.Fatalf("Test %d: Failed to create HTTP request: <ERROR> %v", i+1, err)
		}
		apiRouter.ServeHTTP(rec, req)
		if rec.Code != http.StatusOK {
			t.Fatalf("Test %d: Expected the response status to be 200, but instead found `%d`", i+1, rec.Code)
		}
		err = getTestWebRPCResponse(rec, &setAuthReply)
		if testCase.success && err != nil {
			t.Fatalf("Test %d: Supposed to succeed but failed, %v", i+1, err)
		}
		if !testCase.success && err == nil {
			t.Fatalf("Test %d: Supposed to fail but succeeded, %v", i+1, err)
		}
		if testCase.success && setAuthReply.Token == "" {
			t.Fatalf("Test %d: Failed to set auth keys", i+1)
		}
	}
}

// Wrapper for calling Get Auth Handler
func TestWebHandlerGetAuth(t *testing.T) {
	ExecObjectLayerTest(t, testGetAuthWebHandler)
}

// testGetAuthWebHandler - Test GetAuth web handler
func testGetAuthWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	rec := httptest.NewRecorder()
	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	getAuthRequest := WebGenericArgs{}
	getAuthReply := &GetAuthReply{}
	req, err := newTestWebRPCRequest("Web.GetAuth", authorization, getAuthRequest)
	if err != nil {
		t.Fatalf("Failed to create HTTP request: <ERROR> %v", err)
	}
	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("Expected the response status to be 200, but instead found `%d`", rec.Code)
	}
	err = getTestWebRPCResponse(rec, &getAuthReply)
	if err != nil {
		t.Fatalf("Failed, %v", err)
	}
	if getAuthReply.AccessKey != credentials.AccessKeyID || getAuthReply.SecretKey != credentials.SecretAccessKey {
		t.Fatalf("Failed to get correct auth keys")
	}
}

// Wrapper for calling Upload Handler
func TestWebHandlerUpload(t *testing.T) {
	ExecObjectLayerTest(t, testUploadWebHandler)
}

// testUploadWebHandler - Test Upload web handler
func testUploadWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	rec := httptest.NewRecorder()
	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	objectName := "test.file"
	bucketName := getRandomBucketName()
	// Create bucket.
	err = obj.MakeBucket(bucketName)
	if err != nil {
		// failed to create newbucket, abort.
		t.Fatalf("%s : %s", instanceType, err)
	}

	content := []byte("temporary file's content")

	req, err := http.NewRequest("PUT", "/minio/upload/"+bucketName+"/"+objectName, nil)
	req.Header.Set("Authorization", "Bearer "+authorization)
	req.Header.Set("Content-Length", strconv.Itoa(len(content)))
	req.Header.Set("x-amz-date", "20160814T114029Z")
	req.Header.Set("Accept", "*/*")
	req.Body = ioutil.NopCloser(bytes.NewReader(content))

	if err != nil {
		t.Fatalf("Cannot create upload request, %v", err)
	}

	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("Expected the response status to be 200, but instead found `%d`", rec.Code)
	}

	var byteBuffer bytes.Buffer
	err = obj.GetObject(bucketName, objectName, 0, int64(len(content)), &byteBuffer)
	if err != nil {
		t.Fatalf("Failed, %v", err)
	}

	if bytes.Compare(byteBuffer.Bytes(), content) != 0 {
		t.Fatalf("The upload file is different from the download file")
	}
}

// Wrapper for calling Upload Handler
func TestWebHandlerDownload(t *testing.T) {
	ExecObjectLayerTest(t, testDownloadWebHandler)
}

// testDownloadWebHandler - Test Download web handler
func testDownloadWebHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
	// Register the API end points with XL/FS object layer.
	apiRouter := initTestWebRPCEndPoint(obj)
	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	rootPath, err := newTestConfig("us-east-1")
	if err != nil {
		t.Fatalf("Init Test config failed")
	}
	// remove the root folder after the test ends.
	defer removeAll(rootPath)

	credentials := serverConfig.GetCredential()

	rec := httptest.NewRecorder()
	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
	if err != nil {
		t.Fatal("Cannot authenticate")
	}

	objectName := "test.file"
	bucketName := getRandomBucketName()
	// Create bucket.
	err = obj.MakeBucket(bucketName)
	if err != nil {
		// failed to create newbucket, abort.
		t.Fatalf("%s : %s", instanceType, err)
	}

	content := []byte("temporary file's content")
	_, err = obj.PutObject(bucketName, objectName, int64(len(content)), bytes.NewReader(content), map[string]string{"md5Sum": "01ce59706106fe5e02e7f55fffda7f34"})
	if err != nil {
		t.Fatalf("Was not able to upload an object, %v", err)
	}

	req, err := http.NewRequest("GET", "/minio/download/"+bucketName+"/"+objectName+"?token="+authorization, nil)

	if err != nil {
		t.Fatalf("Cannot create upload request, %v", err)
	}

	apiRouter.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("Expected the response status to be 200, but instead found `%d`", rec.Code)
	}

	if bytes.Compare(rec.Body.Bytes(), content) != 0 {
		t.Fatalf("The downloaded file is corrupted")
	}
}