Get Jest working

kulshekhar/ts-jest#4081 (comment) https://koenvg.medium.com/setting-up-jest-with-sveltekit-4f0a0e379668#3f2e https://github.com/pmucha/sveltekit-jest-setup
MaddyGuthridge · May 19, 2024 · 7c6584b · 7c6584b
1 parent bdc0e2c
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diff --git a/babel.config.cjs b/babel.config.cjs
@@ -0,0 +1,12 @@
+module.exports = {
+  presets: [
+    [
+      '@babel/preset-env',
+      {
+        targets: {
+          node: 'current'
+        },
+      },
+    ],
+  ],
+}
diff --git a/jest.config.cjs b/jest.config.cjs
@@ -0,0 +1,33 @@
+module.exports = {
+  setupFilesAfterEnv: [
+    "jest-extended/all"
+  ],
+  maxWorkers: 1,
+  transform: {
+    "^.+\\.svelte$": [
+      "svelte-jester",
+      {
+        preprocess: true
+      }
+    ],
+    "^.+\\.js$": "babel-jest",
+    // https://github.com/kulshekhar/ts-jest/issues/4081#issuecomment-1515758013
+    "^.+\\.ts$": ["ts-jest", { tsconfig: './tsconfig.jest.json' }],
+  },
+  testEnvironment: "jsdom",
+  moduleFileExtensions: [
+    "js",
+    "ts",
+    "svelte"
+  ],
+  // https://koenvg.medium.com/setting-up-jest-with-sveltekit-4f0a0e379668#3f2e
+	moduleNameMapper: {
+		'^\\$lib(.*)$': '<rootDir>/src/lib$1',
+		'^\\$types(.*)$': '<rootDir>/src/types$1',
+		'^\\$components(.*)$': '<rootDir>/src/components$1',
+		'^\\$app(.*)$': [
+			'<rootDir>/.svelte-kit/dev/runtime/app$1',
+			'<rootDir>/.svelte-kit/build/runtime/app$1'
+		]
+	}
+};