build: configure Jest

Since Next.js v12, we can use next/js package with some
preconfigured Jest options.

1 files changed, 15 insertions, 0 deletions

diff --git a/__tests__/jest/__mocks__/matchMedia.mock.js b/__tests__/jest/__mocks__/matchMedia.mock.js
new file mode 100644
index 0000000..a983ad3
--- /dev/null
+++ b/__tests__/jest/__mocks__/matchMedia.mock.js
@@ -0,0 +1,15 @@
+Object.defineProperty(window, 'matchMedia', {
+  writable: true,
+  value: jest.fn().mockImplementation((query) => ({
+    matches: false,
+    media: query,
+    onchange: null,
+    addListener: jest.fn(), // deprecated
+    removeListener: jest.fn(), // deprecated
+    addEventListener: jest.fn(),
+    removeEventListener: jest.fn(),
+    dispatchEvent: jest.fn(),
+  })),
+});
+
+export {};