[Vue] add support for `appEntrypoint` (#5075)

* feat(vue): add support for appEntrypoint

* chore: add changeset

* test(vue): add tests for app entrypoint

* docs(vue): update README to include app entrypoint

* fix(vue): prefer resolvedVirtualModuleId

Co-authored-by: Nate Moore <nate@astro.build>

1 files changed, 17 insertions, 0 deletions

diff --git a/packages/integrations/vue/test/test-utils.js b/packages/integrations/vue/test/test-utils.js
new file mode 100644
index 000000000..2475944be
--- /dev/null
+++ b/packages/integrations/vue/test/test-utils.js
@@ -0,0 +1,17 @@
+import { loadFixture as baseLoadFixture } from '../../../astro/test/test-utils.js';
+
+/**
+ * @typedef {import('../../../astro/test/test-utils').Fixture} Fixture
+ */
+
+export function loadFixture(inlineConfig) {
+	if (!inlineConfig || !inlineConfig.root)
+		throw new Error("Must provide { root: './fixtures/...' }");
+
+	// resolve the relative root (i.e. "./fixtures/tailwindcss") to a full filepath
+	// without this, the main `loadFixture` helper will resolve relative to `packages/astro/test`
+	return baseLoadFixture({
+		...inlineConfig,
+		root: new URL(inlineConfig.root, import.meta.url).toString(),
+	});
+}