add test coverage setup

Author: DaltheCow

.prettierignore

@@ -15,4 +15,4 @@
 !/.eslintrc.json
 !/tsconfig*.json
 !/*.config.{js,ts}
-!/jest.setup.ts
+!/jest.setup.ts

jest.config.js

@@ -5,16 +5,21 @@ const createJestConfig = nextJest({
 });
 
 const customJestConfig = {
-  collectCoverage: false,
-  collectCoverageFrom: ['tests'],
-  coverageDirectory: './.meta',
-  coverageReporters: ['json-summary'],
+  collectCoverage: true,
+  collectCoverageFrom: ['./src/ui/**/*.{ts,tsx}'],
+  coverageDirectory: './coverage',
+  coverageProvider: 'v8',
+  coverageReporters: ['json', 'text-summary', 'lcov'],
   moduleFileExtensions: ['ts', 'tsx', 'js'],
   moduleNameMapper: {
     '^@/(.*)$': '<rootDir>/$1',
   },
   setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
   testEnvironment: 'jest-environment-jsdom',
+  testMatch: [
+    '<rootDir>/tests/ui/unit/**/*.(test|spec).{ts,tsx,js,jsx}',
+    '<rootDir>/tests/ui/integration/**/*.(test|spec).{ts,tsx,js,jsx}',
+  ],
 };
 
 module.exports = createJestConfig(customJestConfig);