From a08b7e9112c2188ef62b8a77f7ad09073f126884 Mon Sep 17 00:00:00 2001
From: Joachim Van Herwegen <joachimvh@gmail.com>
Date: Mon, 14 Dec 2020 13:44:37 +0100
Subject: [PATCH] fix: Allow DataAccessorBasedStore to create root

---
 src/storage/DataAccessorBasedStore.ts            |  3 ++-
 test/unit/storage/DataAccessorBasedStore.test.ts | 15 +++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/storage/DataAccessorBasedStore.ts b/src/storage/DataAccessorBasedStore.ts
index e71b7544a..296e3f853 100644
--- a/src/storage/DataAccessorBasedStore.ts
+++ b/src/storage/DataAccessorBasedStore.ts
@@ -218,7 +218,8 @@ export class DataAccessorBasedStore implements ResourceStore {
       await this.handleContainerData(representation);
     }
 
-    if (createContainers) {
+    // Root container should not have a parent container
+    if (createContainers && !this.identifierStrategy.isRootContainer(identifier)) {
       await this.createRecursiveContainers(this.identifierStrategy.getParentContainer(identifier));
     }
 
diff --git a/test/unit/storage/DataAccessorBasedStore.test.ts b/test/unit/storage/DataAccessorBasedStore.test.ts
index 29a14c642..3512dc413 100644
--- a/test/unit/storage/DataAccessorBasedStore.test.ts
+++ b/test/unit/storage/DataAccessorBasedStore.test.ts
@@ -343,6 +343,21 @@ describe('A DataAccessorBasedStore', (): void => {
         new ConflictHttpError(`Creating container ${root}a/ conflicts with an existing resource.`),
       );
     });
+
+    it('can write to root if it does not exist.', async(): Promise<void> => {
+      // eslint-disable-next-line @typescript-eslint/no-dynamic-delete
+      delete accessor.data[root];
+      const resourceID = { path: `${root}` };
+
+      // Generate based on URI
+      representation.metadata.removeAll(RDF.type);
+      representation.metadata.contentType = 'text/turtle';
+      representation.data = guardedStreamFrom([]);
+      await expect(store.setRepresentation(resourceID, representation)).resolves.toBeUndefined();
+      expect(accessor.data[resourceID.path]).toBeTruthy();
+      expect(Object.keys(accessor.data)).toHaveLength(1);
+      expect(accessor.data[resourceID.path].metadata.contentType).toBeUndefined();
+    });
   });
 
   describe('modifying a Representation', (): void => {