microsoft: Add basic tests

Implemented similar to connector/github/github_test.go

connector/microsoft/microsoft_test.go

@@ -0,0 +1,90 @@
+package microsoft
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"reflect"
+	"testing"
+
+	"github.com/dexidp/dex/connector"
+)
+
+type testResponse struct {
+	data interface{}
+}
+
+const tenant = "9b1c3439-a67e-4e92-bb0d-0571d44ca965"
+
+var dummyToken = testResponse{data: map[string]interface{}{
+	"access_token": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9",
+	"expires_in":   "30",
+}}
+
+func TestUserIdentityFromGraphAPI(t *testing.T) {
+	s := newTestServer(map[string]testResponse{
+		"/v1.0/me?$select=id,displayName,userPrincipalName": {
+			data: user{ID: "S56767889", Name: "Jane Doe", Email: "jane.doe@example.com"},
+		},
+		"/" + tenant + "/oauth2/v2.0/token": dummyToken,
+	})
+	defer s.Close()
+
+	req, _ := http.NewRequest("GET", s.URL, nil)
+
+	c := microsoftConnector{apiURL: s.URL, graphURL: s.URL, tenant: tenant}
+	identity, err := c.HandleCallback(connector.Scopes{Groups: false}, req)
+	expectNil(t, err)
+	expectEquals(t, identity.Username, "Jane Doe")
+	expectEquals(t, identity.UserID, "S56767889")
+	expectEquals(t, identity.PreferredUsername, "")
+	expectEquals(t, identity.Email, "jane.doe@example.com")
+	expectEquals(t, identity.EmailVerified, true)
+	expectEquals(t, len(identity.Groups), 0)
+}
+
+func TestUserGroupsFromGraphAPI(t *testing.T) {
+	s := newTestServer(map[string]testResponse{
+		"/v1.0/me?$select=id,displayName,userPrincipalName": {data: user{}},
+		"/v1.0/me/getMemberGroups": {data: map[string]interface{}{
+			"value": []string{"a", "b"},
+		}},
+		"/" + tenant + "/oauth2/v2.0/token": dummyToken,
+	})
+	defer s.Close()
+
+	req, _ := http.NewRequest("GET", s.URL, nil)
+
+	c := microsoftConnector{apiURL: s.URL, graphURL: s.URL, tenant: tenant}
+	identity, err := c.HandleCallback(connector.Scopes{Groups: true}, req)
+	expectNil(t, err)
+	expectEquals(t, identity.Groups, []string{"a", "b"})
+}
+
+func newTestServer(responses map[string]testResponse) *httptest.Server {
+	s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		response, found := responses[r.RequestURI]
+		if !found {
+			fmt.Fprintf(os.Stderr, "Mock response for %q not found\n", r.RequestURI)
+			http.NotFound(w, r)
+			return
+		}
+		w.Header().Add("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(response.data)
+	}))
+	return s
+}
+
+func expectNil(t *testing.T, a interface{}) {
+	if a != nil {
+		t.Errorf("Expected %+v to equal nil", a)
+	}
+}
+
+func expectEquals(t *testing.T, a interface{}, b interface{}) {
+	if !reflect.DeepEqual(a, b) {
+		t.Errorf("Expected %+v to equal %+v", a, b)
+	}
+}