chore: Add wallaby config (Workday#297)

Author: NicholasBoll

Diff for: wallaby.js

@@ -0,0 +1,42 @@
+const path = require('path');
+
+module.exports = wallaby => {
+  return {
+    files: [
+      'jest.config.js',
+      'jest/setupTests.ts',
+      'modules/**/*.ts?(x)',
+      '!**/*.spec.ts?(x)',
+      '!**/*.d.ts',
+      '!**/stories*.{ts,tsx,js,jsx}',
+      {pattern: 'modules/**/node_modules/**', ignore: true},
+    ],
+    tests: ['modules/**/*.spec.ts?(x)'],
+
+    env: {
+      type: 'node',
+      runner: 'node',
+    },
+
+    testFramework: 'jest',
+
+    compilers: {
+      '**/*.ts?(x)': wallaby.compilers.babel(), // We're using Babel to compile all files seen by Jest
+    },
+
+    setup: w => {
+      console.log('wallaby.projectCacheDir', w.projectCacheDir);
+      const jestConfig = require('./jest.config.js');
+
+      // Wallaby compiles, instruments and copies files found in `files` to the projectCacheDir. We need to tell Jest about this file
+      jestConfig.setupFilesAfterEnv = [`${w.projectCacheDir}/jest/setupTests.js`];
+
+      // Tell Jest how to resolve symlinked modules. Without this, Jest will look at source TS files and not at Wallaby's compiled & instrumented files
+      jestConfig.moduleNameMapper = {
+        '@workday/canvas-kit-react-(.*)': '<rootDir>/modules/$1/react',
+      },
+
+      w.testFramework.configure(jestConfig);
+    },
+  };
+};