Copilot remote agent tests (#7528)

* Copilot remote agent tests

* Add reference types (#7530)

* Moving diffs to fixture

---------

Co-authored-by: Alex Ross <38270282+alexr00@users.noreply.github.com>

Author: osortega

src/lm/tools/copilotRemoteAgentTool.ts

@@ -127,7 +127,10 @@ export class CopilotRemoteAgentTool implements vscode.LanguageModelTool<CopilotR
 			};
 			const buffer: Buffer = Buffer.from(JSON.stringify(preferredRendering));
 			const data: Uint8Array = Uint8Array.from(buffer);
-			lmResult.push(new vscode.LanguageModelDataPart2(data, 'application/pull-request+json', [vscode.LanguageModelPartAudience.User]));
+
+			// API might not be available for tests, this guarantees we are still able to test
+			const userAudience = vscode.LanguageModelPartAudience.User;
+			lmResult.push(new vscode.LanguageModelDataPart2(data, 'application/pull-request+json', [userAudience]));
 		}
 
 		return new vscode.LanguageModelToolResult2(lmResult);

src/test/common/fixtures/gitdiff/sessionParsing.ts

@@ -0,0 +1,23 @@
+export const simpleDiff = `diff --git a/src/file.ts b/src/file.ts
+index 1234567..abcdefg 100644
+--- a/src/file.ts
++++ b/src/file.ts
+@@ -1,4 +1,4 @@
+ export function hello() {
+-  console.log('hello');
++  console.log('hello world');
+ }`
+
+export const diffHeaders = `diff --git a/package.json b/package.json
+index 1111111..2222222 100644
+--- a/package.json
++++ b/package.json
+@@ -1,5 +1,5 @@
+ {
+   "name": "test"
+ }`;
+
+export const diffNoAts = `diff --git a/file.txt b/file.txt
+index 1234567..abcdefg 100644
+--- a/file.txt
++++ b/file.txt`;

src/test/common/sessionParsing.test.ts

@@ -0,0 +1,275 @@
+/*---------------------------------------------------------------------------------------------
+ *  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 {
+	parseSessionLogs,
+	parseToolCallDetails,
+	parseDiff,
+	toFileLabel,
+	SessionResponseLogChunk
+} from '../../../common/sessionParsing';
+import { diffHeaders, diffNoAts, simpleDiff } from './fixtures/gitdiff/sessionParsing';
+
+describe('sessionParsing', function () {
+	describe('parseSessionLogs()', function () {
+		it('should parse valid session logs', function () {
+			const rawText = `data: {"choices":[{"finish_reason":"tool_calls","delta":{"content":"","role":"assistant","tool_calls":[{"function":{"arguments":"{\\"command\\": \\"view\\", \\"path\\": \\"/home/runner/work/repo/repo/src/file.ts\\"}","name":"str_replace_editor"},"id":"call_123","type":"function","index":0}]}}],"created":1640995200,"id":"chatcmpl-123","usage":{"completion_tokens":10,"prompt_tokens":50,"prompt_tokens_details":{"cached_tokens":0},"total_tokens":60},"model":"gpt-4","object":"chat.completion.chunk"}`;
+
+			const result = parseSessionLogs(rawText);
+
+			assert.strictEqual(result.length, 1);
+			assert.strictEqual(result[0].choices.length, 1);
+			assert.strictEqual(result[0].choices[0].finish_reason, 'tool_calls');
+			assert.strictEqual(result[0].choices[0].delta.role, 'assistant');
+			assert.strictEqual(result[0].choices[0].delta.tool_calls?.length, 1);
+			assert.strictEqual(result[0].choices[0].delta.tool_calls?.[0].function.name, 'str_replace_editor');
+		});
+
+		it('should handle malformed JSON gracefully', function () {
+			const rawText = `data: {"invalid": "json"
+data: {"choices":[{"finish_reason":"stop","delta":{"content":"Hello","role":"assistant"}}],"created":1640995200,"id":"chatcmpl-123","usage":{"completion_tokens":1,"prompt_tokens":10,"prompt_tokens_details":{"cached_tokens":0},"total_tokens":11},"model":"gpt-4","object":"chat.completion.chunk"}`;
+
+			assert.throws(() => {
+				parseSessionLogs(rawText);
+			});
+		});
+
+		it('should parse tool calls correctly', function () {
+			const rawText = `data: {"choices":[{"finish_reason":"tool_calls","delta":{"content":"","role":"assistant","tool_calls":[{"function":{"arguments":"{\\"command\\": \\"bash\\", \\"args\\": \\"ls -la\\"}","name":"bash"},"id":"call_456","type":"function","index":0}]}}],"created":1640995200,"id":"chatcmpl-456","usage":{"completion_tokens":5,"prompt_tokens":20,"prompt_tokens_details":{"cached_tokens":0},"total_tokens":25},"model":"gpt-4","object":"chat.completion.chunk"}`;
+
+			const result = parseSessionLogs(rawText);
+
+			assert.strictEqual(result.length, 1);
+			assert.strictEqual(result[0].choices[0].delta.tool_calls?.[0].function.name, 'bash');
+		});
+
+		it('should filter out non-data lines', function () {
+			const rawText = `some random line
+data: {"choices":[{"finish_reason":"stop","delta":{"content":"Hello","role":"assistant"}}],"created":1640995200,"id":"chatcmpl-123","usage":{"completion_tokens":1,"prompt_tokens":10,"prompt_tokens_details":{"cached_tokens":0},"total_tokens":11},"model":"gpt-4","object":"chat.completion.chunk"}
+another non-data line`;
+
+			const result = parseSessionLogs(rawText);
+
+			assert.strictEqual(result.length, 1);
+		});
+	});
+
+	describe('parseToolCallDetails()', function () {
+		it('should parse str_replace_editor tool calls with view command', function () {
+			const toolCall = {
+				function: {
+					name: 'str_replace_editor',
+					arguments: '{"command": "view", "path": "/home/runner/work/repo/repo/src/example.ts"}'
+				},
+				id: 'call_123',
+				type: 'function',
+				index: 0
+			};
+
+			const result = parseToolCallDetails(toolCall, '');
+
+			assert.strictEqual(result.toolName, 'Read');
+			assert.strictEqual(result.invocationMessage, 'Read src/example.ts');
+			assert.strictEqual(result.pastTenseMessage, 'Read src/example.ts');
+			if (result.toolSpecificData && 'command' in result.toolSpecificData) {
+				assert.strictEqual(result.toolSpecificData.command, 'view');
+			}
+		});
+
+		it('should parse str_replace_editor tool calls with edit command', function () {
+			const toolCall = {
+				function: {
+					name: 'str_replace_editor',
+					arguments: '{"command": "str_replace", "path": "/home/runner/work/repo/repo/src/example.ts"}'
+				},
+				id: 'call_123',
+				type: 'function',
+				index: 0
+			};
+
+			const result = parseToolCallDetails(toolCall, '');
+
+			assert.strictEqual(result.toolName, 'Edit');
+			assert.strictEqual(result.invocationMessage, 'Edit [](src/example.ts)');
+			assert.strictEqual(result.pastTenseMessage, 'Edit [](src/example.ts)');
+			if (result.toolSpecificData && 'command' in result.toolSpecificData) {
+				assert.strictEqual(result.toolSpecificData.command, 'str_replace');
+			}
+		});
+
+		it('should parse bash tool calls', function () {
+			const toolCall = {
+				function: {
+					name: 'bash',
+					arguments: '{"command": "npm test"}'
+				},
+				id: 'call_456',
+				type: 'function',
+				index: 0
+			};
+
+			const result = parseToolCallDetails(toolCall, 'Test output here');
+
+			assert.strictEqual(result.toolName, 'Run Bash command');
+			assert.strictEqual(result.invocationMessage, '$ npm test\nTest output here');
+			if (result.toolSpecificData && 'language' in result.toolSpecificData) {
+				assert.strictEqual(result.toolSpecificData.language, 'bash');
+				assert.strictEqual(result.toolSpecificData.commandLine.original, 'npm test');
+			}
+		});
+
+		it('should parse think tool calls', function () {
+			const toolCall = {
+				function: {
+					name: 'think',
+					arguments: '{}'
+				},
+				id: 'call_789',
+				type: 'function',
+				index: 0
+			};
+
+			const result = parseToolCallDetails(toolCall, 'I need to analyze this code');
+
+			assert.strictEqual(result.toolName, 'Thought');
+			assert.strictEqual(result.invocationMessage, 'I need to analyze this code');
+		});
+
+		it('should parse report_progress tool calls', function () {
+			const toolCall = {
+				function: {
+					name: 'report_progress',
+					arguments: '{"prDescription": "Updated the test files", "commitMessage": "feat: add new tests"}'
+				},
+				id: 'call_101',
+				type: 'function',
+				index: 0
+			};
+
+			const result = parseToolCallDetails(toolCall, '');
+
+			assert.strictEqual(result.toolName, 'Progress Update');
+			assert.strictEqual(result.invocationMessage, 'Updated the test files');
+			assert.strictEqual(result.originMessage, 'Commit: feat: add new tests');
+		});
+
+		it('should handle unknown tool types', function () {
+			const toolCall = {
+				function: {
+					name: 'unknown_tool',
+					arguments: '{"param": "value"}'
+				},
+				id: 'call_999',
+				type: 'function',
+				index: 0
+			};
+
+			const result = parseToolCallDetails(toolCall, 'some content');
+
+			assert.strictEqual(result.toolName, 'unknown_tool');
+			assert.strictEqual(result.invocationMessage, 'some content');
+		});
+
+		it('should handle malformed tool arguments', function () {
+			const toolCall = {
+				function: {
+					name: 'str_replace_editor',
+					arguments: '{"invalid": json}'
+				},
+				id: 'call_error',
+				type: 'function',
+				index: 0
+			};
+
+			const result = parseToolCallDetails(toolCall, '');
+
+			// Should fall back gracefully with empty args - goes to the 'else' branch which returns 'Edit'
+			assert.strictEqual(result.toolName, 'Edit');
+		});
+
+		it('should handle repository root paths correctly', function () {
+			const toolCall = {
+				function: {
+					name: 'str_replace_editor',
+					arguments: '{"command": "view", "path": "/home/runner/work/repo/repo/"}'
+				},
+				id: 'call_root',
+				type: 'function',
+				index: 0
+			};
+
+			const result = parseToolCallDetails(toolCall, '');
+
+			assert.strictEqual(result.toolName, 'Read repository');
+			assert.strictEqual(result.invocationMessage, 'Read repository');
+		});
+	});
+
+	describe('parseDiff()', function () {
+		it('should parse diff content correctly', function () {
+			const result = parseDiff(simpleDiff);
+
+			assert(result);
+			assert.strictEqual(result.fileA, '/src/file.ts');
+			assert.strictEqual(result.fileB, '/src/file.ts');
+			assert(result.content.includes("export function hello()"));
+			assert(result.content.includes("console.log('hello world')"));
+		});
+
+		it('should extract file paths from diff headers', function () {
+			const result = parseDiff(diffHeaders);
+
+			assert(result);
+			assert.strictEqual(result.fileA, '/package.json');
+			assert.strictEqual(result.fileB, '/package.json');
+		});
+
+		it('should handle malformed diffs', function () {
+			const diffContent = `not a diff at all`;
+
+			const result = parseDiff(diffContent);
+
+			assert.strictEqual(result, undefined);
+		});
+
+		it('should handle diffs without @@ lines', function () {
+			const result = parseDiff(diffNoAts);
+
+			assert.strictEqual(result, undefined);
+		});
+	});
+
+	describe('toFileLabel()', function () {
+		it('should convert absolute paths to relative labels', function () {
+			const path = '/home/runner/work/repo/repo/src/components/Button.tsx';
+
+			const result = toFileLabel(path);
+
+			assert.strictEqual(result, 'src/components/Button.tsx');
+		});
+
+		it('should handle various path formats', function () {
+			assert.strictEqual(toFileLabel('/home/runner/work/repo/repo/package.json'), 'package.json');
+			assert.strictEqual(toFileLabel('/home/runner/work/repo/repo/src/index.ts'), 'src/index.ts');
+			assert.strictEqual(toFileLabel('/home/runner/work/repo/repo/docs/README.md'), 'docs/README.md');
+		});
+
+		it('should handle edge cases', function () {
+			assert.strictEqual(toFileLabel('/home/runner/work/repo/repo/'), '');
+			assert.strictEqual(toFileLabel('/'), '');
+			assert.strictEqual(toFileLabel(''), '');
+		});
+
+		it('should handle shorter paths', function () {
+			const shortPath = '/home/runner/work/repo';
+
+			const result = toFileLabel(shortPath);
+
+			// Should return empty string when path is too short
+			assert.strictEqual(result, '');
+		});
+	});
+});