From 43aeea15ba421f53c82396c92b93081511fa1fb3 Mon Sep 17 00:00:00 2001
From: Dmitry Kuzin <dk981234@gmail.com>
Date: Fri, 29 Sep 2023 20:13:27 +0400
Subject: [PATCH] Work for https://github.com/surveyjs/survey-pdf/issues/280:
 fix isReady always false when call options.setItems([])

---
 src/question_baseselect.ts     |  5 ++++-
 tests/questionDropdownTests.ts | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/question_baseselect.ts b/src/question_baseselect.ts
index 0ca9106c1f..c4248bb6d8 100644
--- a/src/question_baseselect.ts
+++ b/src/question_baseselect.ts
@@ -586,7 +586,10 @@ export class QuestionSelectBase extends Question {
         values: valueArray,
         setItems: (displayValues: Array<string>, ...customValues: Array<IValueItemCustomPropValues>) => {
           this.waitingGetChoiceDisplayValueResponse = false;
-          if (!displayValues || !displayValues.length) return;
+          if (!displayValues || !displayValues.length) {
+            this.updateIsReady();
+            return;
+          }
           const items = displayValues.map((displayValue, index) => this.createItemValue(valueArray[index], displayValue));
           this.setCustomValuesIntoItems(items, customValues);
           if(Array.isArray(value)) {
diff --git a/tests/questionDropdownTests.ts b/tests/questionDropdownTests.ts
index ff79577d93..700ae34dc5 100644
--- a/tests/questionDropdownTests.ts
+++ b/tests/questionDropdownTests.ts
@@ -1647,6 +1647,24 @@ QUnit.test("isReady flag + onGetChoiceDisplayValue", assert => {
   assert.ok(question["waitingGetChoiceDisplayValueResponse"]);
 });
 
+QUnit.test("isReady flag + onGetChoiceDisplayValue + setItems with empty array", assert => {
+  const json = {
+    questions: [{
+      "type": "dropdown",
+      "name": "q1",
+      "choicesLazyLoadEnabled": true,
+    }]
+  };
+  const survey = new SurveyModel(json);
+  const question = <QuestionDropdownModel>survey.getAllQuestions()[0];
+  survey.onGetChoiceDisplayValue.add((_, opt) => {
+    opt.setItems([]);
+  });
+  survey.data = { "q1": "ford" };
+  assert.ok(question.isReady);
+  assert.equal(question.displayValue, "ford");
+});
+
 QUnit.test("isReady flag + onGetChoiceDisplayValue + choicesRestfull", assert => {
   const done = assert.async();