test: Add dual package hazard integration test

Author: yaacovCR

integrationTests/README.md

@@ -14,6 +14,10 @@ Each subdirectory represents a different environment/bundler:
 - `ts` - tests for supported Typescript versions
 - `webpack` - tests for Webpack
 
+### Dual Package Hazard Tests
+
+- `dual-vitest` - ensure that vitest loads only a single package.
+
 ### Verifying Development Mode Tests
 
 Each subdirectory represents a different environment/bundler demonstrating enabling development mode via conditional exports or by explicitly importing `graphql/dev`:

resources/integration-test.ts

@@ -16,7 +16,7 @@ describe('Integration Tests', () => {
   const archiveName = npm({ cwd: tmpDirPath(), quiet: true }).pack(distDir);
   fs.renameSync(tmpDirPath(archiveName), tmpDirPath('graphql.tgz'));
 
-  npm().run('build:deno');
+  // npm().run('build:deno');
 
   function testOnNodeProject(projectName: string) {
     const projectPath = tmpDirPath(projectName);
@@ -29,6 +29,9 @@ describe('Integration Tests', () => {
     }).timeout(120000);
   }
 
+  testOnNodeProject('dual-vitest');
+  return;
+
   testOnNodeProject('ts');
   testOnNodeProject('node');
   testOnNodeProject('webpack');