test(app): load the image decoder in unit tests

packages/app/vitest-environment.test.ts

@@ -14,6 +14,12 @@ const tsgoEntry = path.join(
   "bin/tsgo.js",
 );
 
+it("the test environment loads Expo Image", async () => {
+  const { Image } = await import("expo-image");
+
+  expect(Image).toEqual(expect.any(Function));
+});
+
 it("the test configuration typechecks with Expo's generated environment declaration", () => {
   const fixtureDir = mkdtempSync(path.join(appDir, ".vitest-expo-env-"));
   try {

packages/app/vitest.config.ts

@@ -19,6 +19,23 @@ const resolvePackageEntry = (packageName: string) => {
 
 export default defineConfig({
   plugins: [
+    {
+      name: "bundle-expo-runtime",
+      // Expo initializes import.meta through a literal require of TypeScript.
+      // Bundle that boundary so Node need not resolve Metro's extensionless require.
+      async transform(_source, id) {
+        if (!id.endsWith("/expo/src/winter/runtime.ts")) return;
+        const result = await build({
+          entryPoints: [id],
+          bundle: true,
+          format: "esm",
+          platform: "neutral",
+          define: { __DEV__: "false" },
+          write: false,
+        });
+        return { code: result.outputFiles[0].text, map: null };
+      },
+    },
     {
       name: "markdown-wasm-commonjs-export",
       transform(source, id) {