From 0cf9cf082997259f2dd6ff45f38a3cff52acdf24 Mon Sep 17 00:00:00 2001
From: Joel Einbinder <joel.einbinder@gmail.com>
Date: Mon, 19 Jul 2021 11:59:53 -0500
Subject: [PATCH] fix(test-runner): set expand: false for expect. (#7722)

---
 src/test/expect.ts                   |  1 +
 tests/playwright-test/expect.spec.ts | 17 +++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/test/expect.ts b/src/test/expect.ts
index dd15c1316b..744ebafd39 100644
--- a/src/test/expect.ts
+++ b/src/test/expect.ts
@@ -58,3 +58,4 @@ function toMatchSnapshot(this: ReturnType<Expect['getState']>, received: Buffer
 }
 
 expectLibrary.extend({ toMatchSnapshot });
+expectLibrary.setState({ expand: false });
\ No newline at end of file
diff --git a/tests/playwright-test/expect.spec.ts b/tests/playwright-test/expect.spec.ts
index 8b5d06124a..4727e287bc 100644
--- a/tests/playwright-test/expect.spec.ts
+++ b/tests/playwright-test/expect.spec.ts
@@ -125,3 +125,20 @@ test('should work with custom PlaywrightTest namespace', async ({runTSC}) => {
   });
   expect(result.exitCode).toBe(0);
 });
+
+test('should not expand huge arrays', async ({runInlineTest}) => {
+  const result = await runInlineTest({
+    'expect-test.spec.ts': `
+      const { test } = pwt;
+      test('numeric ranges', () => {
+        const a1 = Array(100000).fill(1);
+        const a2 = Array(100000).fill(1);
+        a2[500] = 2;
+        test.expect(a1).toEqual(a2);
+      });
+    `
+  });
+  expect(result.exitCode).toBe(1);
+  expect(result.passed).toBe(0);
+  expect(result.output.length).toBeLessThan(100000);
+});
\ No newline at end of file