Fix missing bnode generation for empty nodes

rubensworks · Oct 14, 2020 · dd8022e · dd8022e
1 parent 830da21
commit dd8022e
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Showing 3 changed files with 14 additions and 3 deletions.
diff --git a/lib/Util.ts b/lib/Util.ts
@@ -420,7 +420,8 @@ export class Util {
         }
       } else {
         // Only make a blank node if at least one triple was emitted at the value's level.
-        if (this.parsingContext.emittedStack[depth + 1]) {
+        if (this.parsingContext.emittedStack[depth + 1]
+          || (value && typeof value === 'object' && Object.keys(value).length === 0)) {
           return (this.parsingContext.idStack[depth + 1]
             || (this.parsingContext.idStack[depth + 1] = [ this.dataFactory.blankNode() ]));
         } else {

diff --git a/test/JsonLdParser-test.ts b/test/JsonLdParser-test.ts
@@ -332,6 +332,16 @@ describe('JsonLdParser', () => {
           ]);
         });
 
+        it('without @id and anonymous blank node value', async () => {
+          const stream = streamifyString(`
+{
+  "http://ex.org/pred1": {}
+}`);
+          return expect(await arrayifyStream(stream.pipe(parser))).toBeRdfIsomorphic([
+            DF.quad(DF.blankNode(), DF.namedNode('http://ex.org/pred1'), DF.blankNode()),
+          ]);
+        });
+
         it('with @id', async () => {
           const stream = streamifyString(`
 {

diff --git a/test/Util-test.ts b/test/Util-test.ts
@@ -221,9 +221,9 @@ describe('Util', () => {
       });
 
       describe('for an object', () => {
-        it('without an @id should return []', async () => {
+        it('without an @id should return a bnode', async () => {
           return expect(await util.valueToTerm(context, 'key', {}, 0, []))
-            .toEqual([]);
+            .toEqualRdfTermArray([DF.blankNode()]);
         });
 
         it('without an @id should return a blank node when a value was emitted at a deeper depth', async () => {