Fixes microsoft#135440

Author: hediet

src/vs/editor/contrib/inlineCompletions/suggestWidgetInlineCompletionProvider.ts

@@ -190,13 +190,13 @@ export class SuggestWidgetInlineCompletionProvider extends Disposable {
 	}
 }
 
-function rangeStartsWith(rangeToTest: Range, prefix: Range): boolean {
+export function rangeStartsWith(rangeToTest: Range, prefix: Range): boolean {
 	return (
-		rangeToTest.startLineNumber === prefix.startLineNumber &&
-		rangeToTest.startColumn === prefix.startColumn &&
-		(rangeToTest.endLineNumber < prefix.endLineNumber ||
-			(rangeToTest.endLineNumber === prefix.endLineNumber &&
-				rangeToTest.endColumn <= prefix.endColumn))
+		prefix.startLineNumber === rangeToTest.startLineNumber &&
+		prefix.startColumn === rangeToTest.startColumn &&
+		(prefix.endLineNumber < rangeToTest.endLineNumber ||
+			(prefix.endLineNumber === rangeToTest.endLineNumber &&
+				prefix.endColumn <= rangeToTest.endColumn))
 	);
 }
 

src/vs/editor/contrib/inlineCompletions/test/suggestWidgetModel.test.ts

@@ -32,8 +32,20 @@ import { createTextModel } from 'vs/editor/test/common/editorTestUtils';
 import { ILabelService } from 'vs/platform/label/common/label';
 import { IWorkspaceContextService } from 'vs/platform/workspace/common/workspace';
 import { minimizeInlineCompletion } from 'vs/editor/contrib/inlineCompletions/inlineCompletionsModel';
+import { rangeStartsWith } from 'vs/editor/contrib/inlineCompletions/suggestWidgetInlineCompletionProvider';
 
 suite('Suggest Widget Model', () => {
+	test('rangeStartsWith', () => {
+		assert.strictEqual(rangeStartsWith(new Range(1, 1, 10, 5), new Range(1, 1, 1, 1)), true);
+		assert.strictEqual(rangeStartsWith(new Range(1, 1, 10, 5), new Range(1, 1, 10, 5)), true);
+		assert.strictEqual(rangeStartsWith(new Range(1, 1, 10, 5), new Range(1, 1, 10, 4)), true);
+		assert.strictEqual(rangeStartsWith(new Range(1, 1, 10, 5), new Range(1, 1, 9, 6)), true);
+
+		assert.strictEqual(rangeStartsWith(new Range(2, 1, 10, 5), new Range(1, 1, 10, 5)), false);
+		assert.strictEqual(rangeStartsWith(new Range(1, 1, 10, 5), new Range(1, 1, 10, 6)), false);
+		assert.strictEqual(rangeStartsWith(new Range(1, 1, 10, 5), new Range(1, 1, 11, 4)), false);
+	});
+
 	test('Active', async () => {
 		await withAsyncTestCodeEditorAndInlineCompletionsModel('',
 			{ fakeClock: true, provider, },