update swagger, fix minor issues in test

docs/swagger.yaml

@@ -1,5 +1,3 @@
-# this is an example of the Uber API
-# as a demonstration of an API spec in YAML
 swagger: '2.0'
 info:
   title: Harbor API
@@ -786,6 +784,32 @@ paths:
           description: Retrieved manifests from a relevant repository not found.
         500:
           description: Unexpected internal errors.
+  /repositories/signatures:
+    get:
+      summary: Get signature information of a repository
+      description: |
+        This endpoint aims to retrieve signature information of a repository, the data is
+        from the nested notary instance of Harbor.
+        If the repository does not have any signature information in notary, this API will
+        return an empty list with response code 200, instead of 404
+      parameters:
+        - name: repo_name
+          in: query
+          type: string
+          required: true
+          description: repository name.
+      tags:
+        - Products
+      responses:
+        200:
+          description: Retrieved signatures.
+          schema:
+            type: array
+            items:
+              $ref: '#/definitions/RepoSignature'
+        500:
+          description: Server side error.
+      
   /repositories/top:
     get:
       summary: Get public repositories which are accessed most.
@@ -2025,3 +2049,12 @@ definitions:
       email_identity:
         type: string
         description: The dentity of email server.
+  RepoSignature:
+    type: object
+    properties:
+      tag:
+        type: string
+        description: The tag of image.
+      hashes:
+        type: object
+        description: The JSON object of the hash of the image.

src/common/utils/notary/helper_test.go

@@ -5,6 +5,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	notarytest "github.com/vmware/harbor/src/common/utils/notary/test"
 
+	"os"
 	"path"
 	"testing"
 )
@@ -16,7 +17,10 @@ func TestMain(m *testing.M) {
 	defer notaryServer.Close()
 	notaryEndpoint = notaryServer.URL
 	notaryCachePath = "/tmp/notary"
-	m.Run()
+	result := m.Run()
+	if result != 0 {
+		os.Exit(result)
+	}
 }
 
 func TestGetTargets(t *testing.T) {

src/common/utils/notary/test/server.go

@@ -37,7 +37,6 @@ func NewNotaryServer(endpoint string) *httptest.Server {
 	validRoot := fmt.Sprintf("/v2/%s/notary-demo/busybox/_trust/tuf/", endpoint)
 	invalidRoot := fmt.Sprintf("/v2/%s/notary-demo/fail/_trust/tuf/", endpoint)
 	p := currPath()
-	fmt.Printf("valid web root: %s, local path: %s\n", validRoot, path.Join(p, "valid"))
 	mux.Handle(validRoot, http.StripPrefix(validRoot, http.FileServer(http.Dir(path.Join(p, "valid")))))
 	mux.Handle(invalidRoot, http.StripPrefix(invalidRoot, http.FileServer(http.Dir(path.Join(p, "invalid")))))
 	return httptest.NewServer(mux)