test(s3): e2e test for s3 selectObjectContent (#3642)

Author: AllanZhengYP

clients/client-s3/test/e2e/S3.ispec.ts

@@ -248,4 +248,44 @@ describe("@aws-sdk/client-s3", () => {
       expect((listUploadsResult.Uploads || []).map((upload) => upload.UploadId)).not.to.contain(toAbort);
     });
   });
+
+  describe("selectObjectContent", () => {
+    const csvFile = `user_name,age
+jsrocks,13
+node4life,22
+esfuture,29`;
+    before(async () => {
+      Key = `${Date.now()}`;
+      await client.putObject({ Bucket, Key, Body: csvFile });
+    });
+    after(async () => {
+      await client.deleteObject({ Bucket, Key });
+    });
+    it("should succeed", async () => {
+      const { Payload } = await client.selectObjectContent({
+        Bucket,
+        Key,
+        ExpressionType: "SQL",
+        Expression: "SELECT user_name FROM S3Object WHERE cast(age as int) > 20",
+        InputSerialization: {
+          CSV: {
+            FileHeaderInfo: "USE",
+            RecordDelimiter: "\n",
+            FieldDelimiter: ",",
+          },
+        },
+        OutputSerialization: {
+          CSV: {},
+        },
+      });
+      const events = [];
+      for await (const event of Payload) {
+        events.push(event);
+      }
+      expect(events.length).to.equal(3);
+      expect(Buffer.from(events[0].Records.Payload).toString("utf8")).to.equal("node4life\nesfuture\n");
+      expect(events[1].Stats.Details).to.be.exist;
+      expect(events[2].End).to.be.exist;
+    });
+  });
 });