Add tests for data parameter

tests/issues/#109-no-data-response.test.js

@@ -0,0 +1,49 @@
+const { expect } = require("chai");
+const Jaysonic = require("../../src");
+const { server } = require("../test-server");
+
+const tcpclient = new Jaysonic.client.tcp();
+
+server.method("dataError", () => {
+  const error = new Error("errrorWithData");
+  error.data = [{ foo: "bar" }];
+  throw error;
+});
+
+server.method(
+  "promise.dataError",
+  () => new Promise((resolve, reject) => {
+    const error = new Error("reject");
+    error.data = [{ foo: "bar" }];
+    reject(error);
+  })
+);
+
+describe("#109 Return Data Parameter from Client", () => {
+  describe("client", () => {
+    before(async () => {
+      await server.listen();
+      await tcpclient.connect();
+    });
+    after(async () => {
+      await tcpclient.end();
+      await server.close();
+    });
+    it("should return data parameter from client if server responds with one", async () => {
+      try {
+        await tcpclient.send("dataError");
+      } catch (e) {
+        expect(e.error).to.have.property("data");
+        expect(e.error.data).to.be.eql([{ foo: "bar" }]);
+      }
+    });
+    it("should return data parameter from client if server responds with one from a promise method", async () => {
+      try {
+        await tcpclient.send("promise.dataError");
+      } catch (e) {
+        expect(e.error).to.have.property("data");
+        expect(e.error.data).to.be.eql([{ foo: "bar" }]);
+      }
+    });
+  });
+});