Add information about jest to readme

Mock console.trace to fix errors in jest tests
AdguardTeam · Apr 28, 2023 · 91abfd2 · 91abfd2
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diff --git a/README.md b/README.md
@@ -536,6 +536,8 @@ Run next command
 yarn browserstack
 ```
 
+Tests run by `jest` should be named `.spec.js`, so they will be not included in the `QUnit` tests.
+
 ### Debugging
 
 Use `debugger;` statement where you need it, run

diff --git a/tests/scriptlets/trusted-set-cookie-reload.spec.js b/tests/scriptlets/trusted-set-cookie-reload.spec.js
@@ -21,6 +21,10 @@ beforeEach(() => {
                 jest.fn(),
         },
     });
+
+    // Mocking console.trace() because
+    // it causes errors in tests using jest
+    window.console.trace = jest.fn();
 });
 
 afterEach(() => {