move failsIf() helper into shared module

Author: petebacondarwin

packages/vite-plugin-cloudflare/playground/__test-utils__/index.ts

@@ -1,2 +1,8 @@
+import { test } from "vitest";
+
 export * from "../vitest-setup";
 export * from "./responses";
+
+export function failsIf(condition: boolean) {
+	return condition ? test.fails : test;
+}

packages/vite-plugin-cloudflare/playground/react-spa/__tests__/assets.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, test } from "vitest";
-import { isBuild, page, viteTestUrl } from "../../__test-utils__";
+import { failsIf, isBuild, page, viteTestUrl } from "../../__test-utils__";
 
 describe("react-spa", () => {
 	test("returns the correct home page", async () => {
@@ -65,7 +65,3 @@ describe("react-spa", () => {
 		);
 	});
 });
-
-function failsIf(condition: boolean) {
-	return condition ? test.fails : test;
-}

packages/vite-plugin-cloudflare/playground/react-spa/__tests__/experimental-headers-and-redirects/assets.spec.ts

@@ -1,7 +1,7 @@
 import { readFileSync, writeFileSync } from "node:fs";
 import { join } from "node:path";
 import { describe, expect, test, vi } from "vitest";
-import { isBuild, page, viteTestUrl } from "../../../__test-utils__";
+import { failsIf, isBuild, page, viteTestUrl } from "../../../__test-utils__";
 
 describe(
 	"react-spa (with experimental support)",
@@ -115,7 +115,3 @@ describe("reloading the server", () => {
 		}
 	);
 });
-
-function failsIf(condition: boolean) {
-	return condition ? test.fails : test;
-}