Add tests for EditMessageComposer

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

test/components/views/rooms/EditMessageComposer-test.tsx

@@ -0,0 +1,73 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from "react";
+import { ReactWrapper, mount } from "enzyme";
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
+import { MessageEvent } from 'matrix-events-sdk';
+import { act } from "react-test-renderer";
+
+import EditMessageComposerWithMatrixClient from "../../../../src/components/views/rooms/EditMessageComposer";
+import EditorStateTransfer from "../../../../src/utils/EditorStateTransfer";
+import MatrixClientContext from "../../../../src/contexts/MatrixClientContext";
+import { stubClient } from "../../../test-utils";
+import { MatrixClientPeg } from "../../../../src/MatrixClientPeg";
+
+describe("EditMessageComposer", () => {
+    beforeAll(() => {
+        stubClient();
+    });
+
+    describe("save button disabled state behaves correctly", () => {
+        it("should handle regular text changes", () => {
+            const mxEvent = new MatrixEvent(MessageEvent.from("world").serialize());
+            const wrapper = createEditor(mxEvent);
+            let saveButton = wrapper.find(".mx_AccessibleButton_kind_primary");
+
+            expect(saveButton.props()["aria-disabled"]).toBeTruthy();
+            addText(wrapper, "Hello ");
+
+            saveButton = wrapper.find(".mx_AccessibleButton_kind_primary");
+            expect(saveButton.props()["aria-disabled"]).toBeFalsy();
+        });
+
+    });
+});
+
+const addText = (wrapper: ReactWrapper, text: string) => act(() => {
+    // couldn't get input event on contenteditable to work
+    // paste works without illegal private method access
+    const pasteEvent = {
+        clipboardData: {
+            types: [],
+            files: [],
+            getData: type => type === "text/plain" ? text : undefined,
+        },
+    };
+    wrapper.find('[role="textbox"]').simulate('paste', pasteEvent);
+    wrapper.update();
+});
+
+const createEditor = (mxEvent: MatrixEvent): ReactWrapper => {
+    const client = MatrixClientPeg.get();
+    const editState = new EditorStateTransfer(mxEvent);
+
+    return mount(
+        <MatrixClientContext.Provider value={client}>
+            <EditMessageComposerWithMatrixClient editState={editState} />
+        </MatrixClientContext.Provider>,
+    );
+};