update to use toBeNil() matcher

Author: Mat Jones

src/utilities/do-try.test.ts

@@ -26,14 +26,13 @@ describe("do-try.ts", () => {
             // 5 assertions to be called.
             Do.try(workload).catch(
                 (result?: ResultRecord<any>, error?: any) => {
-                    expect(result).not.toBeUndefined();
-                    expect(result).not.toBeNull();
+                    expect(result).not.toBeNil();
                     expect(error).toBeUndefined();
                     expect(result!.resultObject).toBeUndefined();
                     expect(result!.errors).toHaveLength(1);
                 }
             );
-            expect.assertions(5);
+            expect.assertions(4);
         });
 
         it("When passed an async method and a Javascript error occurs, then passes along regular error", async () => {
@@ -45,12 +44,11 @@ describe("do-try.ts", () => {
             // Act & Assert
             Do.try(workload).catch(
                 (result?: ResultRecord<any>, error?: any) => {
-                    expect(error).not.toBeNull();
-                    expect(error).not.toBeUndefined();
+                    expect(error).not.toBeNil();
                     expect(result).toBeUndefined();
                 }
             );
-            expect.assertions(3);
+            expect.assertions(2);
         });
 
         it("When no errors occur, then catch handler is never called", async () => {
@@ -108,8 +106,7 @@ describe("do-try.ts", () => {
             const result = DoSync.try(workload).execute();
 
             // Assert
-            expect(result).not.toBeUndefined();
-            expect(result).not.toBeNull();
+            expect(result).not.toBeNil();
             expect(result).toBeInstanceOf(StubResourceRecord);
         });
 
@@ -123,8 +120,7 @@ describe("do-try.ts", () => {
             const result = DoSync.try(workload)
                 .catch((result?: ResultRecord<any>, error?: any) => {
                     expect(result).toBeUndefined();
-                    expect(error).not.toBeUndefined();
-                    expect(error).not.toBeNull();
+                    expect(error).not.toBeNil();
                 })
                 .execute();
 
@@ -144,8 +140,7 @@ describe("do-try.ts", () => {
             const result = DoSync.try(workload)
                 .catch((result?: ResultRecord<any>, error?: any) => {
                     expect(error).toBeUndefined();
-                    expect(result).not.toBeUndefined();
-                    expect(result).not.toBeNull();
+                    expect(result).not.toBeNil();
                     expect(result!.resultObject).toBeUndefined();
                     expect(result!.errors).toHaveLength(1);
                 })