test: - Add tests of QueryResultsRenderer's findClosestParentTask()

The tests are in ListItem.test.ts for now, as we hope to move the functionality there eventually.

Co-Authored-By: Ilyas Landikov <[email protected]>

Author: claremacrae

src/Renderer/QueryResultsRenderer.ts

@@ -36,7 +36,7 @@ export interface QueryRendererParameters {
  *
  * @param listItem
  */
-function findClosestParentTask(listItem: ListItem) {
+export function findClosestParentTask(listItem: ListItem) {
     // Try to find the closest parent that is a task
     let closestParentTask = listItem.parent;
     while (closestParentTask !== null && !(closestParentTask instanceof Task)) {

tests/Task/ListItem.test.ts

@@ -8,6 +8,7 @@ import { TaskLocation } from '../../src/Task/TaskLocation';
 import { ListItem } from '../../src/Task/ListItem';
 import { TaskBuilder } from '../TestingTools/TaskBuilder';
 import { fromLine } from '../TestingTools/TestHelpers';
+import { findClosestParentTask } from '../../src/Renderer/QueryResultsRenderer';
 import { createChildListItem } from './ListItemHelpers';
 
 window.moment = moment;
@@ -100,6 +101,28 @@ describe('list item tests', () => {
     });
 });
 
+describe('related items', () => {
+    it('should detect if no closest parent task', () => {
+        const task = fromLine({ line: '- [ ] task' });
+        const item = new ListItem('- item', null);
+        const childOfItem = new ListItem('- child of item', item);
+
+        expect(findClosestParentTask(task)).toEqual(null);
+        expect(findClosestParentTask(item)).toEqual(null);
+        expect(findClosestParentTask(childOfItem)).toEqual(null);
+    });
+
+    it('should find the closest parent task', () => {
+        const parentTask = fromLine({ line: '- [ ] task' });
+        const child = new ListItem('- item', parentTask);
+        const grandChild = new ListItem('- item', child);
+
+        expect(findClosestParentTask(parentTask)).toEqual(null);
+        expect(findClosestParentTask(child)).toEqual(parentTask);
+        expect(findClosestParentTask(grandChild)).toEqual(parentTask);
+    });
+});
+
 describe('identicalTo', () => {
     it('should test same markdown', () => {
         const listItem1 = new ListItem('- same description', null);