1 files changed, 35 insertions, 0 deletions
diff --git a/packages/astro/test/experimental-content-collections-cache-invalidation.test.js b/packages/astro/test/experimental-content-collections-cache-invalidation.test.js
index abc8ea839..0f4534e51 100644
--- a/packages/astro/test/experimental-content-collections-cache-invalidation.test.js
+++ b/packages/astro/test/experimental-content-collections-cache-invalidation.test.js
@@ -11,14 +11,17 @@ describe('Experimental Content Collections cache - invalidation', () => {
 			this.cacheDir = new URL(relCacheDir, this.root);
 			this.tmpDir = new URL(`./tmp` + relCacheDir.slice(1), this.root);
 		}
+
 		backup() {
 			this.rmTmp();
 			copyFiles(this.cacheDir, this.tmpDir);
 		}
+
 		restore() {
 			fs.rmSync(this.cacheDir, { recursive: true });
 			copyFiles(this.tmpDir, this.cacheDir);
 		}
+
 		rmTmp() {
 			fs.rmSync(this.tmpDir, { force: true, recursive: true });
 		}
@@ -26,6 +29,7 @@ describe('Experimental Content Collections cache - invalidation', () => {
 
 	class ManifestTestPlugin {
 		used = false;
+
 		plugin() {
 			return {
 				name: '@test/manifest-used',
@@ -99,4 +103,35 @@ describe('Experimental Content Collections cache - invalidation', () => {
 			assert.equal(testPlugin.used, false, 'manifest not used because of lockfile mismatch');
 		});
 	});
+
+	describe('duplicate content', () => {
+		let fixture,
+			backup,
+			/** @type {ManifestTestPlugin} */
+			testPlugin;
+		before(async () => {
+			testPlugin = new ManifestTestPlugin();
+			fixture = await loadFixture({
+				root: './fixtures/content-collections-same-contents/',
+				cacheDir: './cache/same-contents/',
+				experimental: { contentCollectionCache: true },
+				integrations: [testPlugin.plugin()],
+			});
+			backup = new CacheBackup(
+				'./fixtures/content-collections-same-contents/',
+				'./cache/same-contents/'
+			);
+			backup.backup();
+			await fixture.build();
+		});
+
+		after(async () => {
+			backup.restore();
+			//await fixture.clean();
+		});
+
+		it('Manifest was not used', () => {
+			assert.equal(testPlugin.used, false, 'manifest not used because of lockfile mismatch');
+		});
+	});
 });