add tests for service operations with user details

backend/app/store/engine/bolt_test.go

@@ -625,7 +625,7 @@ func TestBoltDB_UserDetail(t *testing.T) {
 	b, teardown := prep(t)
 	defer teardown()
 
-	// add to entries to DB before we start
+	// add two entries to DB before we start
 	result, err := b.UserDetail(UserDetailRequest{Locator: store.Locator{SiteID: "radio-t"}, UserID: "u1", Detail: UserEmail, Update: "test@example.com"})
 	assert.NoError(t, err, "No error inserting entry expected")
 	assert.ElementsMatch(t, []UserDetailEntry{{UserID: "u1", Email: "test@example.com"}}, result)

backend/app/store/service/service_test.go

@@ -774,6 +774,41 @@ func TestService_SetMetas(t *testing.T) {
 	assert.Equal(t, []engine.UserDetailEntry{{UserID: "user1", Email: "test@example.org"}}, val)
 }
 
+func TestService_UserDetailsOperations(t *testing.T) {
+	defer teardown(t)
+	b := DataStore{Engine: prepStoreEngine(t), EditDuration: 100 * time.Millisecond,
+		AdminStore: admin.NewStaticKeyStore("secret 123")}
+
+	// add single valid entry
+	result, err := b.SetUserEmail(store.Locator{SiteID: "radio-t"}, "u1", "test@example.com")
+	assert.NoError(t, err, "No error inserting entry expected")
+	assert.Equal(t, "test@example.com", result)
+
+	// read valid entry back
+	result, err = b.GetUserEmail(store.Locator{SiteID: "radio-t"}, "u1")
+	assert.NoError(t, err, "No error reading entry expected")
+	assert.Equal(t, "test@example.com", result)
+
+	// delete existing entry
+	err = b.DeleteUserDetail(store.Locator{SiteID: "radio-t"}, "u1", engine.UserEmail)
+	assert.NoError(t, err, "No error deleting entry expected")
+
+	// read deleted entry
+	result, err = b.GetUserEmail(store.Locator{SiteID: "radio-t"}, "u1")
+	assert.NoError(t, err, "No error reading entry expected")
+	assert.Empty(t, result)
+
+	// insert entry with invalid site_id
+	result, err = b.SetUserEmail(store.Locator{SiteID: "bad-site"}, "u3", "does_not_matter@example.com")
+	assert.Error(t, err, "Site not found")
+	assert.Empty(t, result)
+
+	// read entry with invalid site_id
+	result, err = b.GetUserEmail(store.Locator{SiteID: "bad-site"}, "u3")
+	assert.Error(t, err, "Site not found")
+	assert.Empty(t, result)
+}
+
 func TestService_IsAdmin(t *testing.T) {
 	defer teardown(t)
 	// two comments for https://radio-t.com