one/dist/esm/vite/plugins/clientTreeShakePlugin.test.mjs

One is a new React Framework that makes Vite serve both native and web.

import { describe, expect, it } from "vitest";
import { transformTreeShakeClient } from "./clientTreeShakePlugin.mjs";
describe("clientTreeShakePlugin", () => {
  describe("transformTreeShakeClient", () => {
    it("should remove loader export and its imports", async () => {
      const result = await transformTreeShakeClient(`
import { serverOnlyModule } from 'server-only-pkg'
import { Text } from 'react-native'
import { useLoader } from 'one'

export function loader() {
  return serverOnlyModule()
}

export default function Page() {
  const data = useLoader(loader)
  return <Text>{data}</Text>
}
`, "/app/index.tsx");
      expect(result).toBeDefined(), expect(result.code).not.toContain("server-only-pkg"), expect(result.code).toContain("react-native"), expect(result.code).toContain("one");
    }), it("should remove loader export with dynamic import", async () => {
      const result = await transformTreeShakeClient(`
import { Text } from 'react-native'
import { useLoader } from 'one'

export async function loader() {
  const { serverFn } = await import('server-only-pkg')
  return serverFn()
}

export default function Page() {
  const data = useLoader(loader)
  return <Text>{data}</Text>
}
`, "/app/index.tsx");
      expect(result).toBeDefined(), expect(result.code).not.toContain("server-only-pkg");
    }), it("should remove loader with const arrow function export", async () => {
      const result = await transformTreeShakeClient(`
import { serverOnlyModule } from 'server-only-pkg'
import { Text } from 'react-native'
import { useLoader } from 'one'

export const loader = async () => {
  return serverOnlyModule()
}

export default function Page() {
  const data = useLoader(loader)
  return <Text>{data}</Text>
}
`, "/app/index.tsx");
      expect(result).toBeDefined(), expect(result.code).not.toContain("server-only-pkg");
    }), it("should handle multiple imports where only some are used in loader", async () => {
      const result = await transformTreeShakeClient(`
import { serverFn } from 'server-only-pkg'
import { sharedUtil } from 'shared-pkg'
import { Text } from 'react-native'
import { useLoader } from 'one'

export function loader() {
  return serverFn()
}

export default function Page() {
  const data = useLoader(loader)
  return <Text>{sharedUtil(data)}</Text>
}
`, "/app/index.tsx");
      expect(result).toBeDefined(), expect(result.code).not.toContain("server-only-pkg"), expect(result.code).toContain("shared-pkg");
    }), it("should remove generateStaticParams and its imports", async () => {
      const result = await transformTreeShakeClient(`
import { getRoutes } from 'server-only-pkg'
import { Text } from 'react-native'

export function generateStaticParams() {
  return getRoutes()
}

export default function Page() {
  return <Text>Hello</Text>
}
`, "/app/[slug].tsx");
      expect(result).toBeDefined(), expect(result.code).not.toContain("server-only-pkg");
    }), it("should not transform files without loader or generateStaticParams", async () => {
      const result = await transformTreeShakeClient(`
import { Text } from 'react-native'

export default function Page() {
  return <Text>Hello</Text>
}
`, "/app/index.tsx");
      expect(result).toBeUndefined();
    }), it("should preserve type-only imports during tree shaking", async () => {
      const result = await transformTreeShakeClient(`
import type { SomeType } from 'types-pkg'
import { serverFn } from 'server-only-pkg'
import { Text } from 'react-native'
import { useLoader } from 'one'

export function loader(): SomeType {
  return serverFn()
}

export default function Page() {
  const data = useLoader(loader)
  return <Text>{data}</Text>
}
`, "/app/index.tsx");
      expect(result).toBeDefined(), expect(result.code).toContain("types-pkg"), expect(result.code).not.toContain("server-only-pkg");
    }), it("should preserve type imports even when used only in loader", async () => {
      const result = await transformTreeShakeClient(`
import type { APIGuildMember } from '@discordjs/core'
import { getClient } from 'discord-client'
import { Text } from 'react-native'
import { useLoader } from 'one'

export function loader(): APIGuildMember {
  return getClient()
}

export default function Page() {
  const data = useLoader(loader)
  return <Text>{JSON.stringify(data)}</Text>
}
`, "/app/index.tsx");
      expect(result).toBeDefined(), expect(result.code).toContain("@discordjs/core"), expect(result.code).not.toContain("discord-client");
    });
  });
});
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