Disallow changing number of playoff alliances after alliance selection.

Author: patfair

web/setup_settings.go

@@ -55,14 +55,16 @@ func (web *Web) settingsPostHandler(w http.ResponseWriter, r *http.Request) {
 		playoffType = model.DoubleEliminationPlayoff
 		numAlliances = 8
 	}
-	if eventSettings.PlayoffType != playoffType {
+	if eventSettings.PlayoffType != playoffType || eventSettings.NumPlayoffAlliances != numAlliances {
 		alliances, err := web.arena.Database.GetAllAlliances()
 		if err != nil {
 			handleWebErr(w, err)
 			return
 		}
 		if len(alliances) > 0 {
-			web.renderSettings(w, r, "Cannot change playoff type after alliance selection has been finalized.")
+			web.renderSettings(
+				w, r, "Cannot change playoff type or size after alliance selection has been finalized.",
+			)
 			return
 		}
 	}

web/setup_settings_test.go

@@ -50,15 +50,21 @@ func TestSetupSettingsDoubleElimination(t *testing.T) {
 
 func TestSetupSettingsInvalidValues(t *testing.T) {
 	web := setupTestWeb(t)
+	recorder := web.postHttpResponse("/setup/settings", "playoffType=SingleEliminationPlayoff&numPlayoffAlliances=8")
+	assert.Equal(t, 303, recorder.Code)
 
 	// Invalid number of alliances.
-	recorder := web.postHttpResponse("/setup/settings", "playoffType=SingleEliminationPlayoff&numAlliances=1")
+	recorder = web.postHttpResponse("/setup/settings", "playoffType=SingleEliminationPlayoff&numAlliances=1")
 	assert.Contains(t, recorder.Body.String(), "must be between 2 and 16")
 
 	// Changing the playoff type after alliance selection is finalized.
 	assert.Nil(t, web.arena.Database.CreateAlliance(&model.Alliance{Id: 1}))
-	recorder = web.postHttpResponse("/setup/settings", "playoffType=SingleEliminationPlayoff&numPlayoffAlliances=8")
-	assert.Contains(t, recorder.Body.String(), "Cannot change playoff type after alliance selection")
+	recorder = web.postHttpResponse("/setup/settings", "playoffType=DoubleEliminationPlayoff")
+	assert.Contains(t, recorder.Body.String(), "Cannot change playoff type or size after alliance selection")
+
+	// Changing the playoff size after alliance selection is finalized.
+	recorder = web.postHttpResponse("/setup/settings", "numPlayoffAlliances=2")
+	assert.Contains(t, recorder.Body.String(), "Cannot change playoff type or size after alliance selection")
 }
 
 func TestSetupSettingsClearDb(t *testing.T) {