test: add fixtures for esm plugin tests

Author: jescalada

test/fixtures/test-package/esm-export.js

@@ -0,0 +1,7 @@
+import { PushActionPlugin } from '@finos/git-proxy/plugin';
+
+// test default export (ESM syntax)
+export default new PushActionPlugin(async (req, action) => {
+  console.log('Dummy plugin: ', action);
+  return action;
+});

test/fixtures/test-package/esm-multiple-export.js

@@ -0,0 +1,13 @@
+import { PushActionPlugin, PullActionPlugin } from '@finos/git-proxy/plugin';
+
+// test multiple exports (ESM syntax)
+export default {
+  foo: new PushActionPlugin(async (req, action) => {
+    console.log('PushActionPlugin: ', action);
+    return action;
+  }),
+  bar: new PullActionPlugin(async (req, action) => {
+    console.log('PullActionPlugin: ', action);
+    return action;
+  }),
+};

test/fixtures/test-package/esm-subclass.js

@@ -0,0 +1,14 @@
+import { PushActionPlugin } from '@finos/git-proxy/plugin';
+
+class DummyPlugin extends PushActionPlugin {
+  constructor(exec) {
+    super();
+    this.exec = exec;
+  }
+}
+
+// test default export (ESM syntax)
+export default new DummyPlugin(async (req, action) => {
+  console.log('Dummy plugin: ', action);
+  return action;
+});