fix: empty SearchOptions causing malformed request

prevents empty SearchOptions from being interpolated into the JIRA REST
request when calling Search on the Issue Service

Author: Rambatino

issue.go

@@ -905,8 +905,22 @@ func (s *IssueService) Search(jql string, options *SearchOptions) ([]Issue, *Res
 	if options == nil {
 		u = fmt.Sprintf("rest/api/2/search?jql=%s", url.QueryEscape(jql))
 	} else {
-		u = fmt.Sprintf("rest/api/2/search?jql=%s&startAt=%d&maxResults=%d&expand=%s&fields=%s&validateQuery=%s", url.QueryEscape(jql),
-			options.StartAt, options.MaxResults, options.Expand, strings.Join(options.Fields, ","), options.ValidateQuery)
+		u = "rest/api/2/search?jql=" + url.QueryEscape(jql)
+		if options.StartAt != 0 {
+			u += fmt.Sprintf("&startAt=%d", options.StartAt)
+		}
+		if options.MaxResults != 0 {
+			u += fmt.Sprintf("&maxResults=%d", options.MaxResults)
+		}
+		if options.Expand != "" {
+			u += fmt.Sprintf("&expand=%s", options.Expand)
+		}
+		if strings.Join(options.Fields, ",") != "" {
+			u += fmt.Sprintf("&fields=%s", strings.Join(options.Fields, ","))
+		}
+		if options.ValidateQuery != "" {
+			u += fmt.Sprintf("&validateQuery=%s", options.ValidateQuery)
+		}
 	}
 
 	req, err := s.client.NewRequest("GET", u, nil)

issue_test.go

@@ -635,15 +635,15 @@ func TestIssueService_SearchPages(t *testing.T) {
 	defer teardown()
 	testMux.HandleFunc("/rest/api/2/search", func(w http.ResponseWriter, r *http.Request) {
 		testMethod(t, r, "GET")
-		if r.URL.String() == "/rest/api/2/search?jql=something&startAt=1&maxResults=2&expand=foo&fields=&validateQuery=warn" {
+		if r.URL.String() == "/rest/api/2/search?jql=something&startAt=1&maxResults=2&expand=foo&validateQuery=warn" {
 			w.WriteHeader(http.StatusOK)
 			fmt.Fprint(w, `{"expand": "schema,names","startAt": 1,"maxResults": 2,"total": 6,"issues": [{"expand": "html","id": "10230","self": "http://kelpie9:8081/rest/api/2/issue/BULK-62","key": "BULK-62","fields": {"summary": "testing","timetracking": null,"issuetype": {"self": "http://kelpie9:8081/rest/api/2/issuetype/5","id": "5","description": "The sub-task of the issue","iconUrl": "http://kelpie9:8081/images/icons/issue_subtask.gif","name": "Sub-task","subtask": true},"customfield_10071": null}},{"expand": "html","id": "10004","self": "http://kelpie9:8081/rest/api/2/issue/BULK-47","key": "BULK-47","fields": {"summary": "Cheese v1 2.0 issue","timetracking": null,"issuetype": {"self": "http://kelpie9:8081/rest/api/2/issuetype/3","id": "3","description": "A task that needs to be done.","iconUrl": "http://kelpie9:8081/images/icons/task.gif","name": "Task","subtask": false}}}]}`)
 			return
-		} else if r.URL.String() == "/rest/api/2/search?jql=something&startAt=3&maxResults=2&expand=foo&fields=&validateQuery=warn" {
+		} else if r.URL.String() == "/rest/api/2/search?jql=something&startAt=3&maxResults=2&expand=foo&validateQuery=warn" {
 			w.WriteHeader(http.StatusOK)
 			fmt.Fprint(w, `{"expand": "schema,names","startAt": 3,"maxResults": 2,"total": 6,"issues": [{"expand": "html","id": "10230","self": "http://kelpie9:8081/rest/api/2/issue/BULK-62","key": "BULK-62","fields": {"summary": "testing","timetracking": null,"issuetype": {"self": "http://kelpie9:8081/rest/api/2/issuetype/5","id": "5","description": "The sub-task of the issue","iconUrl": "http://kelpie9:8081/images/icons/issue_subtask.gif","name": "Sub-task","subtask": true},"customfield_10071": null}},{"expand": "html","id": "10004","self": "http://kelpie9:8081/rest/api/2/issue/BULK-47","key": "BULK-47","fields": {"summary": "Cheese v1 2.0 issue","timetracking": null,"issuetype": {"self": "http://kelpie9:8081/rest/api/2/issuetype/3","id": "3","description": "A task that needs to be done.","iconUrl": "http://kelpie9:8081/images/icons/task.gif","name": "Task","subtask": false}}}]}`)
 			return
-		} else if r.URL.String() == "/rest/api/2/search?jql=something&startAt=5&maxResults=2&expand=foo&fields=&validateQuery=warn" {
+		} else if r.URL.String() == "/rest/api/2/search?jql=something&startAt=5&maxResults=2&expand=foo&validateQuery=warn" {
 			w.WriteHeader(http.StatusOK)
 			fmt.Fprint(w, `{"expand": "schema,names","startAt": 5,"maxResults": 2,"total": 6,"issues": [{"expand": "html","id": "10230","self": "http://kelpie9:8081/rest/api/2/issue/BULK-62","key": "BULK-62","fields": {"summary": "testing","timetracking": null,"issuetype": {"self": "http://kelpie9:8081/rest/api/2/issuetype/5","id": "5","description": "The sub-task of the issue","iconUrl": "http://kelpie9:8081/images/icons/issue_subtask.gif","name": "Sub-task","subtask": true},"customfield_10071": null}}]}`)
 			return