build: configure jest

Since Next.js v12, Jest is already configured with the
next/jest package.
I also added a package to mock next/router.

1 files changed, 44 insertions, 0 deletions

diff --git a/jest.config.js b/jest.config.js
new file mode 100644
index 0000000..8f397f6
--- /dev/null
+++ b/jest.config.js
@@ -0,0 +1,44 @@
+const nextJest = require('next/jest');
+
+const createJestConfig = nextJest({
+  // Provide the path to your Next.js app to load next.config.js and .env files in your test environment
+  dir: './',
+});
+
+/*
+ * Add any custom config to be passed to Jest
+ *
+ * For a detailed explanation regarding each configuration property and type
+ * check, visit:
+ * https://jestjs.io/docs/configuration
+ */
+const customJestConfig = {
+  // if using TypeScript with a baseUrl set to the root directory then you need the below for alias' to work
+  moduleDirectories: ['node_modules', '<rootDir>/'],
+
+  // A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
+  moduleNameMapper: {
+    /** Module Path Aliases */
+    '^@i18n/(.*)$': '<rootDir>/src/i18n/$1',
+    '^@assets/(.*)$': '<rootDir>/src/assets/$1',
+    '^@content/(.*)$': '<rootDir>/src/content/$1',
+    '^@components/(.*)$': '<rootDir>/src/components/$1',
+    '^@pages/(.*)$': '<rootDir>/src/pages/$1',
+    '^@services/(.*)$': '<rootDir>/src/services/$1',
+    '^@styles/(.*)$': '<rootDir>/src/styles/$1',
+    '^@ts/(.*)$': '<rootDir>/src/ts/$1',
+    '^@utils/(.*)$': '<rootDir>/src/utils/$1',
+  },
+
+  // Add more setup options before each test is run
+  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
+
+  // The test environment that will be used for testing
+  testEnvironment: 'jest-environment-jsdom',
+};
+
+/**
+ * createJestConfig is exported this way to ensure that next/jest can load the
+ * Next.js config which is async.
+ */
+module.exports = createJestConfig(customJestConfig);