1 files changed, 66 insertions, 0 deletions
diff --git a/integration-tests/replace.test.ts b/integration-tests/replace.test.ts
new file mode 100644
index 00000000..1ac6f5a4
--- /dev/null
+++ b/integration-tests/replace.test.ts
@@ -0,0 +1,66 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { test } from 'node:test';
+import { strict as assert } from 'assert';
+import { TestRig, printDebugInfo, validateModelOutput } from './test-helper.js';
+
+test('should be able to replace content in a file', async () => {
+  const rig = new TestRig();
+  await rig.setup('should be able to replace content in a file');
+
+  const fileName = 'file_to_replace.txt';
+  const originalContent = 'original content';
+  const expectedContent = 'replaced content';
+
+  rig.createFile(fileName, originalContent);
+  const prompt = `Can you replace 'original' with 'replaced' in the file 'file_to_replace.txt'`;
+
+  const result = await rig.run(prompt);
+
+  const foundToolCall = await rig.waitForToolCall('replace');
+
+  // Add debugging information
+  if (!foundToolCall) {
+    printDebugInfo(rig, result);
+  }
+
+  assert.ok(foundToolCall, 'Expected to find a replace tool call');
+
+  // Validate model output - will throw if no output, warn if missing expected content
+  validateModelOutput(
+    result,
+    ['replaced', 'file_to_replace.txt'],
+    'Replace content test',
+  );
+
+  const newFileContent = rig.readFile(fileName);
+
+  // Add debugging for file content
+  if (newFileContent !== expectedContent) {
+    console.error('File content mismatch - Debug info:');
+    console.error('Expected:', expectedContent);
+    console.error('Actual:', newFileContent);
+    console.error(
+      'Tool calls:',
+      rig.readToolLogs().map((t) => ({
+        name: t.toolRequest.name,
+        args: t.toolRequest.args,
+      })),
+    );
+  }
+
+  assert.strictEqual(
+    newFileContent,
+    expectedContent,
+    'File content should be updated correctly',
+  );
+
+  // Log success info if verbose
+  if (process.env.VERBOSE === 'true') {
+    console.log('File replaced successfully. New content:', newFileContent);
+  }
+});