test(node): cover querying LangChain PDF metadata

nodejs/__test__/table.test.ts

@@ -453,6 +453,51 @@ describe.each([arrow15, arrow16, arrow17, arrow18])(
       ]);
     });
 
+    // https://github.com/lancedb/lancedb/issues/1963
+    it("should query documents with LangChain PDF metadata", async () => {
+      const db = await connect(tmpDir.name);
+      const documents = [
+        {
+          text: "first page",
+          vector: [1, 0],
+          source: "first.pdf",
+          loc: { pageNumber: 1, lines: { from: 1, to: 12 } },
+          pdf: {
+            version: "1.10.100",
+            info: {
+              format: "PDF 1.7",
+              producer: "pdf.js",
+              creator: "Writer",
+            },
+            totalPages: 2,
+          },
+        },
+        {
+          text: "second page",
+          vector: [0, 1],
+          source: "second.pdf",
+          loc: { pageNumber: 2, lines: { from: 13, to: 24 } },
+          pdf: {
+            version: "1.10.100",
+            info: {
+              format: "PDF 1.7",
+              producer: "pdf.js",
+              creator: "Writer",
+            },
+            totalPages: 2,
+          },
+        },
+      ];
+      const documentsTable = await db.createTable("documents", documents);
+
+      const results = await documentsTable.query().toArray();
+
+      expect(results).toHaveLength(2);
+      expect(results[0].source).toBe("first.pdf");
+      expect(results[0].pdf.info.producer).toBe("pdf.js");
+      expect(results[1].loc.pageNumber).toBe(2);
+    });
+
     it("should be able to insert nullable data for non-nullable fields", async () => {
       const db = await connect(tmpDir.name);
       const schema = new arrow.Schema([