Throwing an Error when calling imock() without Proxy support

Author: johanblumenberg

src/ts-mockito.ts

@@ -42,7 +42,7 @@ export function imock<T>(): T {
     const mockedValue = new Mocker(Empty, true).getMock();
 
     if (typeof Proxy === "undefined") {
-        return mockedValue;
+        throw new Error("Mocking of interfaces requires support for Proxy objects");
     }
     const tsmockitoMocker = mockedValue.__tsmockitoMocker;
     return new Proxy(mockedValue, tsmockitoMocker.createCatchAllHandlerForRemainingPropertiesWithoutGetters());

test/mocking.types.spec.ts

@@ -157,18 +157,29 @@ describe("mocking", () => {
         let mockedFoo: SampleInterface;
         let foo: SampleInterface;
 
-        it("can create interface mock", () => {
-            // given
+        if (typeof Proxy === "undefined") {
+            it("throws when creating interface mock", () => {
+                // given
 
-            // when
-            mockedFoo = imock();
-            foo = instance(mockedFoo);
+                // when
 
-            // then
-        });
+                // then
+                expect(() => imock()).toThrow();
+            });
+        }
 
         if (typeof Proxy !== "undefined") {
 
+            it("can create interface mock", () => {
+                // given
+
+                // when
+                mockedFoo = imock();
+                foo = instance(mockedFoo);
+
+                // then
+            });
+
             it("can verify call count", () => {
                 // given
                 mockedFoo = imock();