[gjs/esm/dynamic-imports] Add dynamic import tests.

[Evan Welsh <ewlsh src gnome org>]

commit b920d41530f28d33d8d4acb35043e0732ae387a3
Author: Evan Welsh <contact evanwelsh com>
Date:   Mon Feb 8 19:06:25 2021 -0800

    Add dynamic import tests.

 installed-tests/js/testESModules.js | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
---
diff --git a/installed-tests/js/testESModules.js b/installed-tests/js/testESModules.js
index a36cccc5..5b0cab6a 100644
--- a/installed-tests/js/testESModules.js
+++ b/installed-tests/js/testESModules.js
@@ -68,6 +68,16 @@ describe('Builtin ES modules', function () {
         expect(typeof N_).toBe('function');
     });
 
+    it('gettext named dynamic import', async function () {
+        const localGettext = await import('gettext');
+        expect(typeof localGettext.ngettext).toEqual('function');
+    });
+
+    it('gettext dynamic import matches static import', async function () {
+        const localGettext = await import('gettext');
+        expect(localGettext.default).toEqual(gettext);
+    });
+
     it('system default import', function () {
         expect(typeof system.exit).toBe('function');
     });
@@ -76,6 +86,16 @@ describe('Builtin ES modules', function () {
         expect(typeof exit).toBe('function');
         expect(exit).toBe(system.exit);
     });
+
+    it('system dynamic import matches static import', async function () {
+        const localSystem = await import('system');
+        expect(localSystem.default).toEqual(system);
+    });
+
+    it('system named dynamic import', async function () {
+        const localSystem = await import('system');
+        expect(typeof localSystem.exit).toBe('function');
+    });
 });
 
 describe('Dynamic imports', function () {
@@ -96,4 +116,8 @@ describe('Dynamic imports', function () {
     it('named import', function () {
         expect(module.say('hi')).toEqual('<( hi )');
     });
+
+    it('dynamic gi import matches static', async function () {
+        expect((await import('gi://Gio')).default).toEqual(Gio);
+    });
 });