Fix external assertions tests for Node.js 21

The assertion message is different, which requires more creativity with the snapshots.

Author: novemberborn

test/external-assertions/snapshots/test.js.md

@@ -4,7 +4,7 @@ The actual snapshot is saved in `test.js.snap`.
 
 Generated by [AVA](https://avajs.dev).
 
-## node assertion
+## node assertion (node.js v18)
 
 > Snapshot 1
 
@@ -46,7 +46,196 @@ Generated by [AVA](https://avajs.dev).
     ␊
       2 tests failed`
 
-## expect error
+## expect error (node.js v18)
+
+> Snapshot 1
+
+    `␊
+      ✘ [fail]: test Assertion failed␊
+      ✘ [fail]: test async Assertion failed␊
+      ─␊
+    ␊
+      test␊
+    ␊
+      Assertion failed: ␊
+    ␊
+      expect(received).toBeTruthy()␊
+    ␊
+      Received: false␊
+    ␊
+      Error: expect(received).toBeTruthy()␊
+    ␊
+      Received: false␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+    ␊
+    ␊
+    ␊
+      test async␊
+    ␊
+      Assertion failed: ␊
+    ␊
+      expect(received).toBeTruthy()␊
+    ␊
+      Received: false␊
+    ␊
+      Error: expect(received).toBeTruthy()␊
+    ␊
+      Received: false␊
+          at ---␊
+          at ---␊
+    ␊
+      ─␊
+    ␊
+      2 tests failed`
+
+## node assertion (node.js v20)
+
+> Snapshot 1
+
+    `␊
+      ✘ [fail]: test Assertion failed␊
+      ✘ [fail]: test async Assertion failed␊
+      ─␊
+    ␊
+      test␊
+    ␊
+      Assertion failed: ␊
+    ␊
+      false == true␊
+    ␊
+      AssertionError [ERR_ASSERTION]: false == true␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+    ␊
+    ␊
+    ␊
+      test async␊
+    ␊
+      Assertion failed: ␊
+    ␊
+      false == true␊
+    ␊
+      AssertionError [ERR_ASSERTION]: false == true␊
+          at ---␊
+          at ---␊
+    ␊
+      ─␊
+    ␊
+      2 tests failed`
+
+## expect error (node.js v20)
+
+> Snapshot 1
+
+    `␊
+      ✘ [fail]: test Assertion failed␊
+      ✘ [fail]: test async Assertion failed␊
+      ─␊
+    ␊
+      test␊
+    ␊
+      Assertion failed: ␊
+    ␊
+      expect(received).toBeTruthy()␊
+    ␊
+      Received: false␊
+    ␊
+      Error: expect(received).toBeTruthy()␊
+    ␊
+      Received: false␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+    ␊
+    ␊
+    ␊
+      test async␊
+    ␊
+      Assertion failed: ␊
+    ␊
+      expect(received).toBeTruthy()␊
+    ␊
+      Received: false␊
+    ␊
+      Error: expect(received).toBeTruthy()␊
+    ␊
+      Received: false␊
+          at ---␊
+          at ---␊
+    ␊
+      ─␊
+    ␊
+      2 tests failed`
+
+## node assertion (node.js v21)
+
+> Snapshot 1
+
+    `␊
+      ✘ [fail]: test Assertion failed␊
+      ✘ [fail]: test async Assertion failed␊
+      ─␊
+    ␊
+      test␊
+    ␊
+      Assertion failed: ␊
+    ␊
+      The expression evaluated to a falsy value:␊
+    ␊
+        assert(false)␊
+    ␊
+      AssertionError [ERR_ASSERTION]: The expression evaluated to a falsy value:␊
+    ␊
+        assert(false)␊
+    ␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+          at ---␊
+    ␊
+    ␊
+    ␊
+      test async␊
+    ␊
+      Assertion failed: ␊
+    ␊
+      false == true␊
+    ␊
+      AssertionError [ERR_ASSERTION]: false == true␊
+          at ---␊
+          at ---␊
+    ␊
+      ─␊
+    ␊
+      2 tests failed`
+
+## expect error (node.js v21)
 
 > Snapshot 1
 

test/external-assertions/snapshots/test.js.snap

@@ -1,13 +1,35 @@
+import process from 'node:process';
+
 import test from '@ava/test';
 
 import {fixture} from '../helpers/exec.js';
 
-test('node assertion ', async t => {
-	const result = await t.throwsAsync(fixture(['assert-failure.js']));
-	t.snapshot(result.stdout.replaceAll('\r', '').replaceAll(/\/{3}/g, '//').replaceAll(/at.*\n/g, 'at ---\n'));
-});
+const snapshotStdout = (t, stdout) => {
+	const normalized = stdout
+		.replaceAll('\r', '')
+		.replaceAll(/\/{3}/g, '//')
+		.replaceAll(/(\b)at.*\n/g, '$1at ---\n');
+
+	t.log(process.versions.node.split('.')[0]);
+	t.snapshot(normalized);
+};
+
+const major = process.versions.node.split('.')[0];
+
+for (const version of ['18', '20', '21']) {
+	// Tests need to be declared for all versions, so that snapshots can be
+	// updated by running `npx test-ava -u test/external-assertions/test.js` for
+	// each supported version. However only the tests for the current version
+	// can run, so skip the others.
+	const declare = version === major ? test : test.skip;
+
+	declare(`node assertion (node.js v${version})`, async t => {
+		const result = await t.throwsAsync(fixture(['assert-failure.js']));
+		snapshotStdout(t, result.stdout);
+	});
 
-test('expect error ', async t => {
-	const result = await t.throwsAsync(fixture(['expect-failure.js']));
-	t.snapshot(result.stdout.replaceAll('\r', '').replaceAll(/\/{3}/g, '//').replaceAll(/at.*\n/g, 'at ---\n'));
-});
+	declare(`expect error (node.js v${version})`, async t => {
+		const result = await t.throwsAsync(fixture(['expect-failure.js']));
+		snapshotStdout(t, result.stdout);
+	});
+}