admin: adds paging to global user list

Currently there is a limit of 1000 users in the global
user list. This change introduces paging so that an
admin can see all users and not just the first 1000.

Adds a new route to the api - /api/users/search that
returns a list of users and a total count. It takes
two parameters perpage and page that enable paging.

Fixes #7469

pkg/api/user_test.go

@@ -0,0 +1,109 @@
+package api
+
+import (
+	"testing"
+
+	"github.com/grafana/grafana/pkg/models"
+
+	"github.com/grafana/grafana/pkg/bus"
+	"github.com/grafana/grafana/pkg/components/simplejson"
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestUserApiEndpoint(t *testing.T) {
+	Convey("Given a user is logged in", t, func() {
+		mockResult := models.SearchUserQueryResult{
+			Users: []*models.UserSearchHitDTO{
+				{Name: "user1"},
+				{Name: "user2"},
+			},
+			TotalCount: 2,
+		}
+
+		loggedInUserScenario("When calling GET on", "/api/users", func(sc *scenarioContext) {
+			var sentLimit int
+			var sendPage int
+			bus.AddHandler("test", func(query *models.SearchUsersQuery) error {
+				query.Result = mockResult
+
+				sentLimit = query.Limit
+				sendPage = query.Page
+
+				return nil
+			})
+
+			sc.handlerFunc = SearchUsers
+			sc.fakeReqWithParams("GET", sc.url, map[string]string{}).exec()
+
+			So(sentLimit, ShouldEqual, 1000)
+			So(sendPage, ShouldEqual, 1)
+
+			respJSON, err := simplejson.NewJson(sc.resp.Body.Bytes())
+			So(err, ShouldBeNil)
+			So(len(respJSON.MustArray()), ShouldEqual, 2)
+		})
+
+		loggedInUserScenario("When calling GET with page and limit querystring parameters on", "/api/users", func(sc *scenarioContext) {
+			var sentLimit int
+			var sendPage int
+			bus.AddHandler("test", func(query *models.SearchUsersQuery) error {
+				query.Result = mockResult
+
+				sentLimit = query.Limit
+				sendPage = query.Page
+
+				return nil
+			})
+
+			sc.handlerFunc = SearchUsers
+			sc.fakeReqWithParams("GET", sc.url, map[string]string{"perpage": "10", "page": "2"}).exec()
+
+			So(sentLimit, ShouldEqual, 10)
+			So(sendPage, ShouldEqual, 2)
+		})
+
+		loggedInUserScenario("When calling GET on", "/api/users/search", func(sc *scenarioContext) {
+			var sentLimit int
+			var sendPage int
+			bus.AddHandler("test", func(query *models.SearchUsersQuery) error {
+				query.Result = mockResult
+
+				sentLimit = query.Limit
+				sendPage = query.Page
+
+				return nil
+			})
+
+			sc.handlerFunc = SearchUsersWithPaging
+			sc.fakeReqWithParams("GET", sc.url, map[string]string{}).exec()
+
+			So(sentLimit, ShouldEqual, 1000)
+			So(sendPage, ShouldEqual, 1)
+
+			respJSON, err := simplejson.NewJson(sc.resp.Body.Bytes())
+			So(err, ShouldBeNil)
+
+			So(respJSON.Get("totalCount").MustInt(), ShouldEqual, 2)
+			So(len(respJSON.Get("users").MustArray()), ShouldEqual, 2)
+		})
+
+		loggedInUserScenario("When calling GET with page and perpage querystring parameters on", "/api/users/search", func(sc *scenarioContext) {
+			var sentLimit int
+			var sendPage int
+			bus.AddHandler("test", func(query *models.SearchUsersQuery) error {
+				query.Result = mockResult
+
+				sentLimit = query.Limit
+				sendPage = query.Page
+
+				return nil
+			})
+
+			sc.handlerFunc = SearchUsersWithPaging
+			sc.fakeReqWithParams("GET", sc.url, map[string]string{"perpage": "10", "page": "2"}).exec()
+
+			So(sentLimit, ShouldEqual, 10)
+			So(sendPage, ShouldEqual, 2)
+		})
+	})
+}