added context hook to allow the override of the default binder

scm-ui/ui-extensions/src/binder.ts

@@ -10,11 +10,13 @@ type ExtensionRegistration = {
  * The Binder class is mainly exported for testing, plugins should only use the default export.
  */
 export class Binder {
+  name: string;
   extensionPoints: {
     [key: string]: Array<ExtensionRegistration>;
   };
 
-  constructor() {
+  constructor(name: string) {
+    this.name = name;
     this.extensionPoints = {};
   }
 
@@ -73,6 +75,6 @@ export class Binder {
 }
 
 // singleton binder
-const binder = new Binder();
+const binder = new Binder("default");
 
 export default binder;

scm-ui/ui-extensions/src/index.ts

@@ -1,2 +1,3 @@
-export { default as binder } from "./binder";
+export { default as binder, Binder } from "./binder";
+export * from "./useBinder";
 export { default as ExtensionPoint } from "./ExtensionPoint";

scm-ui/ui-extensions/src/useBinder.test.tsx

@@ -0,0 +1,29 @@
+import useBinder, { BinderContext } from "./useBinder";
+import { Binder } from "./binder";
+import { mount } from "enzyme";
+import "@scm-manager/ui-tests/enzyme";
+import React from "react";
+
+describe("useBinder tests", () => {
+  const BinderName = () => {
+    const binder = useBinder();
+    return <>{binder.name}</>;
+  };
+
+  it("should return default binder", () => {
+    const rendered = mount(<BinderName />);
+    expect(rendered.text()).toBe("default");
+  });
+
+  it("should return binder from context", () => {
+    const binder = new Binder("from-context");
+    const app = (
+      <BinderContext.Provider value={binder}>
+        <BinderName />
+      </BinderContext.Provider>
+    );
+
+    const rendered = mount(app);
+    expect(rendered.text()).toBe("from-context");
+  });
+});

scm-ui/ui-extensions/src/useBinder.ts

@@ -0,0 +1,16 @@
+import { createContext, useContext } from "react";
+import defaultBinder from "./binder";
+
+/**
+ * The BinderContext should only be used to override the default binder for testing purposes.
+ */
+export const BinderContext = createContext(defaultBinder);
+
+/**
+ * Hook to get the binder from context.
+ */
+export const useBinder = () => {
+  return useContext(BinderContext);
+};
+
+export default useBinder;