Add tests for alias() and alias related utils

tests/browser/packages/support/container/container/alias.test.js

@@ -0,0 +1,51 @@
+import { Container } from "@aedart/container";
+
+describe('@aedart/support/container', () => {
+    describe('alias', () => {
+
+        it('can register alias for binding', () => {
+            const container = new Container();
+
+            container
+                .bind('alpha', () => 'beta')
+                .alias('alpha', 'beta');
+
+            // -------------------------------------------------------------------- //
+
+            expect(container.isAlias('beta'))
+                .withContext('Alias not registered')
+                .toBeTrue();
+
+            expect(container.bound('beta'))
+                .withContext('Alias not bound')
+                .toBeTrue();
+
+            const result = container.make('beta');
+            expect(result)
+                .toBe('beta');
+        });
+
+        it('fails when identifier is the same as the alias', () => {
+            const container = new Container();
+
+            const callback = () => {
+                container.alias('a', 'a');    
+            }
+
+            expect(callback)
+                .toThrowError(TypeError);
+        });
+
+        it('can obtain identifier for alias', () => {
+            const container = new Container();
+
+            container.alias('alpha', 'beta');
+
+            // -------------------------------------------------------------------- //
+
+            const result = container.getAlias('beta');
+            expect(result)
+                .toBe('alpha');
+        });
+    });
+});