add encapsulation tests

Author: BMh

src/enip/encapsulation/__snapshots__/encapsulation.spec.js.snap

@@ -217,6 +217,70 @@ Array [
 ]
 `;
 
+exports[`Encapsulation Test Encapsulation Generator Functions ListIdentity Returns Correct Encapsulation String 1`] = `
+Object {
+  "data": Array [
+    99,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+  ],
+  "type": "Buffer",
+}
+`;
+
+exports[`Encapsulation Test Encapsulation Generator Functions ListServices Returns Correct Encapsulation String 1`] = `
+Object {
+  "data": Array [
+    4,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+  ],
+  "type": "Buffer",
+}
+`;
+
 exports[`Encapsulation Test Encapsulation Generator Functions Register Session Returns Correct Encapsulation String 1`] = `
 Object {
   "data": Array [

src/enip/encapsulation/encapsulation.spec.js

@@ -70,7 +70,7 @@ describe("Encapsulation", () => {
     });
 
     describe("Test Encapsulation Generator Functions", () => {
-        const { registerSession, unregisterSession, sendRRData, sendUnitData } = encapsulation;
+        const { registerSession, unregisterSession, sendRRData, sendUnitData, listIdentity, listServices } = encapsulation;
 
         it("Register Session Returns Correct Encapsulation String", () => {
             const data = registerSession();
@@ -95,6 +95,18 @@ describe("Encapsulation", () => {
 
             expect(data).toMatchSnapshot();
         });
+
+        it("ListIdentity Returns Correct Encapsulation String", () => {
+            const data = listIdentity();
+
+            expect(data).toMatchSnapshot();
+        });
+
+        it("ListServices Returns Correct Encapsulation String", () => {
+            const data = listServices();
+
+            expect(data).toMatchSnapshot();
+        });
     });
 
     describe("Test Common Packet Format Helper Functions", () => {