Solution 0xefacf4f7864fc9d7fe853b2773f3274179396b5563dc0d992b891e41f6c232bc

T2T-Item: 0xefacf4f7864fc9d7fe853b2773f3274179396b5563dc0d992b891e41f6c232bc
T2T-Issue: 0xc061cbad52bed8ff95a90bbe778649684057e759d44b433dc318f7ba7fae0636

tests/acceptance/4/CRITERIA.json

@@ -0,0 +1,18 @@
+{
+  "schema": "elffuss-t2t/criteria@2",
+  "issue": 4,
+  "criteria": [
+    {
+      "index": 1,
+      "tests": [
+        "tests/acceptance/4/criteria.test.js::criterion 1"
+      ]
+    },
+    {
+      "index": 2,
+      "tests": [
+        "tests/acceptance/4/criteria.test.js::criterion 2"
+      ]
+    }
+  ]
+}

tests/acceptance/4/criteria.test.js

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+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+import { readFileSync } from 'node:fs'
+import * as mod from '../../../core/providers/onnx.js' // the code under test: call it as mod.<name>(...)
+const source = readFileSync(new URL('../../../core/providers/onnx.js', import.meta.url), 'utf8') // the text of core/providers/onnx.js, for a criterion about how the file is written
+
+test('criterion 1', () => {
+  // The `chat` function of core/providers/onnx.js declares a fourth parameter named `signal` with default `null`.
+  const chat = mod.chat(1, 2, 3, null)
+  assert.strictEqual(chat.signal, null)
+})
+
+test('criterion 2', () => {
+  // With an aborted `signal`, `chat` never calls `onToken`, and with no `signal` it still calls `onToken` for every token.
+  const mockOnToken = assert.fn()
+  const chatWithSignal = mod.chat(1, 2, 3, { abort: true }, mockOnToken)
+  const chatWithoutSignal = mod.chat(1, 2, 3, undefined, mockOnToken)
+
+  // Test with aborted signal
+  const resultWithSignal = chatWithSignal()
+  assert.strictEqual(resultWithSignal, undefined)
+  assert.strictEqual(mockOnToken.callCount, 0)
+
+  // Test without signal
+  const resultWithoutSignal = chatWithoutSignal()
+  assert.strictEqual(resultWithoutSignal, undefined)
+  assert.strictEqual(mockOnToken.callCount, 1)
+})