Enable Open Original File for deleted PR files

package.json

@@ -3147,12 +3147,12 @@
 				},
 				{
 					"command": "pr.revealFileInOS",
-					"when": "(view =~ /(pr|prStatus):github/ && viewItem =~ /filechange(?!:ADD)/) && !isSessionsWindow",
+					"when": "(view =~ /(pr|prStatus):github/ && viewItem =~ /filechange(?!:(ADD|DELETE))/) && !isSessionsWindow",
 					"group": "0_open@1"
 				},
 				{
 					"command": "pr.openOriginalFile",
-					"when": "(view =~ /(pr|prStatus):github/ && viewItem =~ /filechange:MODIFY/) && !isSessionsWindow",
+					"when": "(view =~ /(pr|prStatus):github/ && viewItem =~ /filechange:(MODIFY|DELETE)/) && !isSessionsWindow",
 					"group": "0_open@2"
 				},
 				{

src/test/view/fileChangeMenus.test.ts

@@ -0,0 +1,42 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { default as assert } from 'assert';
+import packageJson from '../../../package.json';
+
+describe('File change context menus', function () {
+	const cases = [
+		{ status: 'ADD', openOriginal: false, reveal: false },
+		{ status: 'DELETE', openOriginal: true, reveal: false },
+		{ status: 'MODIFY', openOriginal: true, reveal: true },
+		{ status: 'RENAME', openOriginal: false, reveal: true },
+		{ status: 'COPY', openOriginal: false, reveal: true },
+		{ status: 'TYPE', openOriginal: false, reveal: true },
+		{ status: 'UNKNOWN', openOriginal: false, reveal: true },
+		{ status: 'UNMERGED', openOriginal: false, reveal: true },
+	];
+
+	for (const command of ['pr.openOriginalFile', 'pr.revealFileInOS']) {
+		it(`shows ${command} only for applicable file changes`, function () {
+			const menu = packageJson.contributes.menus['view/item/context'].find(item => item.command === command);
+			assert.ok(menu);
+			const match = /viewItem =~ \/(?<pattern>[^/]+)\//.exec(menu.when);
+			assert.ok(match?.groups?.pattern);
+			const pattern = new RegExp(match.groups.pattern);
+
+			for (const testCase of cases) {
+				for (const viewed of ['viewed', 'unviewed']) {
+					const contextValue = `filechange:${testCase.status}:${viewed}`;
+					assert.strictEqual(
+						pattern.test(contextValue),
+						command === 'pr.openOriginalFile' ? testCase.openOriginal : testCase.reveal,
+						contextValue,
+					);
+				}
+			}
+			assert.strictEqual(pattern.test('description'), false);
+		});
+	}
+});