Apply strictNullChecks to src/components/views/spaces/* (#10517)

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

test/components/views/spaces/QuickSettingsButton-test.tsx

@@ -0,0 +1,96 @@
+/*
+Copyright 2023 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 { render, screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { mocked } from "jest-mock";
+
+import QuickSettingsButton from "../../../../src/components/views/spaces/QuickSettingsButton";
+import SettingsStore from "../../../../src/settings/SettingsStore";
+import { SdkContextClass } from "../../../../src/contexts/SDKContext";
+
+describe("QuickSettingsButton", () => {
+    const roomId = "!room:example.com";
+
+    const renderQuickSettingsButton = () => {
+        render(<QuickSettingsButton isPanelCollapsed={true} />);
+    };
+
+    const getQuickSettingsButton = () => {
+        return screen.getByRole("button", { name: "Quick settings" });
+    };
+
+    const openQuickSettings = async () => {
+        await userEvent.click(getQuickSettingsButton());
+        await screen.findByText("Quick settings");
+    };
+
+    it("should render the quick settings button", () => {
+        renderQuickSettingsButton();
+        expect(getQuickSettingsButton()).toBeInTheDocument();
+    });
+
+    describe("when the quick settings are open", () => {
+        beforeEach(async () => {
+            renderQuickSettingsButton();
+            await openQuickSettings();
+        });
+
+        it("should not render the »Developer tools« button", () => {
+            renderQuickSettingsButton();
+            expect(screen.queryByText("Developer tools")).not.toBeInTheDocument();
+        });
+    });
+
+    describe("when developer mode is enabled", () => {
+        beforeEach(() => {
+            jest.spyOn(SettingsStore, "getValue").mockImplementation((setting) => setting === "developerMode");
+            renderQuickSettingsButton();
+        });
+
+        afterEach(() => {
+            mocked(SettingsStore.getValue).mockRestore();
+        });
+
+        describe("and no room is viewed", () => {
+            it("should not render the »Developer tools« button", () => {
+                renderQuickSettingsButton();
+                expect(screen.queryByText("Developer tools")).not.toBeInTheDocument();
+            });
+        });
+
+        describe("and a room is viewed", () => {
+            beforeEach(() => {
+                jest.spyOn(SdkContextClass.instance.roomViewStore, "getRoomId").mockReturnValue(roomId);
+            });
+
+            afterEach(() => {
+                mocked(SdkContextClass.instance.roomViewStore.getRoomId).mockRestore();
+            });
+
+            describe("and the quick settings are open", () => {
+                beforeEach(async () => {
+                    await openQuickSettings();
+                });
+
+                it("should render the »Developer tools« button", () => {
+                    expect(screen.getByRole("button", { name: "Developer tools" })).toBeInTheDocument();
+                });
+            });
+        });
+    });
+});