tests: isProxySupported

packages/n4s/src/lib/__tests__/isProxySupported.test.ts

@@ -0,0 +1,35 @@
+import isProxySupported from 'isProxySupported';
+
+describe('isProxySupported', () => {
+  describe('When proxy is supported', () => {
+    it('should return true', () => {
+      expect(isProxySupported()).toBe(true);
+    });
+  });
+
+  describe('When proxy is not supported', () => {
+    describe('When Proxy is undefined', () => {
+      beforeEach(() => {
+        Object.defineProperty(global, 'Proxy', {
+          value: undefined,
+          configurable: true,
+        });
+      });
+
+      it('should return false', () => {
+        expect(isProxySupported()).toBe(false);
+      });
+    });
+
+    describe('When proxy property does not exist on global object', () => {
+      beforeEach(() => {
+        // @ts-ignore
+        delete global.Proxy;
+      });
+
+      it('should return false', () => {
+        expect(isProxySupported()).toBe(false);
+      });
+    });
+  });
+});