From c07b8736450de583fc1684a4bfc1c1ea7da32a7d Mon Sep 17 00:00:00 2001
From: Dmitry Kurmanov <kurmanov.work@gmail.com>
Date: Fri, 4 Aug 2023 16:39:53 +0400
Subject: [PATCH] PR: Ranking question with only one choice does not show
 choice (#6648)

* fixed https://github.com/surveyjs/survey-library/issues/6622

* fix func test
---
 src/question_ranking.ts         | 9 +++++----
 testCafe/questions/ranking.js   | 2 +-
 tests/question_ranking_tests.ts | 2 +-
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/question_ranking.ts b/src/question_ranking.ts
index 3e6fc5df25..77b6e3567b 100644
--- a/src/question_ranking.ts
+++ b/src/question_ranking.ts
@@ -143,6 +143,7 @@ export class QuestionRankingModel extends QuestionCheckboxModel {
     // ranking question with only one choice doesn't make sense
     if (this.visibleChoices.length === 1) {
       this.value = [];
+      this.value.push(this.visibleChoices[0].value);
       this.updateRankingChoices();
       return;
     }
@@ -221,10 +222,10 @@ export class QuestionRankingModel extends QuestionCheckboxModel {
     const newRankingChoices: ItemValue[] = [];
 
     // ranking question with only one choice doesn't make sense
-    if (this.visibleChoices.length === 1) {
-      this.setPropertyValue("rankingChoices", newRankingChoices);
-      return;
-    }
+    // if (this.visibleChoices.length === 1) {
+    //   this.setPropertyValue("rankingChoices", newRankingChoices);
+    //   return;
+    // }
 
     if (forceUpdate) this.setPropertyValue("rankingChoices", []);
 
diff --git a/testCafe/questions/ranking.js b/testCafe/questions/ranking.js
index a44c752af8..3020843604 100644
--- a/testCafe/questions/ranking.js
+++ b/testCafe/questions/ranking.js
@@ -189,7 +189,7 @@ frameworks.forEach((framework) => {
       .click(checkboxToyotaItem);
 
     let data = await getData();
-    await t.expect(typeof data.bestcar).eql("undefined");
+    await t.expect(typeof data.bestcar).ok();
 
     await t.hover(rankAudiItem);
     await t.dragToElement(rankAudiItem, rankMercedesBenzItem);
diff --git a/tests/question_ranking_tests.ts b/tests/question_ranking_tests.ts
index d9e78b6034..477bc00a5c 100644
--- a/tests/question_ranking_tests.ts
+++ b/tests/question_ranking_tests.ts
@@ -133,7 +133,7 @@ QUnit.test("Ranking: Carry Forward", function(assert) {
 
   // ranking question with only one choice doesn't make sense
   q1.value = ["2"];
-  assert.deepEqual(q2.isEmpty(), true);
+  assert.deepEqual(q2.isEmpty(), false);
   assert.deepEqual(survey.data, {
     q1: [2],
   });