Settings unit tests.

__mocks__/fs.js

@@ -6,12 +6,6 @@ function __setFileContents(contents) {
     fileContents = contents;
 }
 
-let writePromise = null;
-
-function __setWritePromise(resolve) {
-    writePromise = Promise.resolve(resolve);
-}
-
 // example info from Node docs
 function statSync(file) {
     return {
@@ -44,16 +38,9 @@ function readFileSync(file, options) {
     return fileContents;
 }
 
-let promises = {
-    writeFile: jest.fn(() => writePromise),
-    readFile: jest.fn(() => fileContents),
-};
-
 fs.__setFileContents = __setFileContents;
-fs.__setWritePromise = __setWritePromise;
 fs.statSync = statSync;
 fs.writeFileSync = writeFileSync;
 fs.readFileSync = readFileSync;
-fs.promises = promises;
 
 module.exports = fs;

src/models/Settings.ts

@@ -20,10 +20,9 @@ interface settingsFile {
 }
 
 export class Settings extends EventEmitter {
-  static #instance: Settings;
+  static #instance: Settings | undefined;
 
   readonly #file: string;
-  #writing: boolean;
 
   minValue: number;
   maxDistance: number;
@@ -61,7 +60,6 @@ export class Settings extends EventEmitter {
     this.minValue = contents.minValue;
     this.maxDistance = contents.maxDistance;
     this.#matrixFile = contents.matrixFile;
-    this.#writing = false;
 
     if (this.#matrixFile) {
       this.#setMatrix();
@@ -76,6 +74,10 @@ export class Settings extends EventEmitter {
     return Settings.#instance;
   }
 
+  static destroy(): void {
+    Settings.#instance = undefined;
+  }
+
   /* -------------------------------------------------------------------------------- save ---- */
 
   async save(settings: settingsFile): Promise<boolean> {
@@ -86,8 +88,11 @@ export class Settings extends EventEmitter {
 
       Log.write('Settings saved!');
 
-      // Update Settings props.
-      await this.#read();
+      try {
+        await this.#read();
+      } catch (err) {
+        Log.write(err);
+      }
 
       return true;
 

test/Settings.test.ts

@@ -1,4 +1,5 @@
-import {expect} from '@jest/globals';
+import {expect, jest} from '@jest/globals';
+import {EliteMatrix} from 'elite-matrix';
 import {Settings} from '../src/models/Settings';
 
 jest.mock('fs');
@@ -34,17 +35,59 @@ describe('Settings', () => {
   });
 
   describe('save()', () => {
+    const writeFileMock = jest.spyOn(require('fs/promises'), 'writeFile');
+    const readFileMock = jest.spyOn(require('fs/promises'), 'readFile');
+
     it('should return boolean', async () => {
+      writeFileMock.mockResolvedValue(undefined);
+      readFileMock.mockResolvedValue(settingsFile);
       const result = await Settings.get().save(settingsFile);
       expect(typeof result).toBe('boolean');
+    });
 
-      require('fs').__setWritePromise(true);
-      const resultResolve = await Settings.get().save(settingsFile);
-      expect(resultResolve).toBe(true);
+    it('should return false when writeFile fails', async () => {
+      writeFileMock.mockImplementation(() => {
+        throw new Error();
+      });
+      const result = await Settings.get().save(settingsFile);
+      expect(result).toBe(false);
+    });
 
-      require('fs').__setWritePromise(false);
-      const resultReject = await Settings.get().save(settingsFile);
-      expect(resultReject).toBe(false);
+    it('should return true when readFile fails', async () => {
+      writeFileMock.mockResolvedValue(undefined);
+      readFileMock.mockImplementation(() => {
+        throw new Error();
+      });
+      const result = await Settings.get().save(settingsFile);
+      expect(result).toBe(true);
     });
   });
+
+  describe('#setMatrix()', () => {
+    const readFileMock = jest.spyOn(require('fs/promises'), 'readFile');
+
+    it('should set matrix from GraphicsConfiguration.xml', (done) => {
+      const settingsFile = {
+        minValue:    500000,
+        maxDistance: 10000,
+        matrixFile:  'GraphicsConfiguration.xml',
+      };
+      require('fs').__setFileContents(JSON.stringify(settingsFile));
+      const matrixFile = '<GraphicsConfig><GUIColour><Default><MatrixRed>1,0,0</MatrixRed><MatrixGreen>0,1,0</MatrixGreen><MatrixBlue>0,0,1</MatrixBlue></Default></GUIColour></GraphicsConfig>';
+      readFileMock.mockResolvedValue(matrixFile);
+
+      const settings = Settings.get();
+
+      settings.on('CUSTOM_COLORS_SET', () => {
+        expect(Settings.get().matrix).toBeDefined();
+        expect(Settings.get().matrix).toBeInstanceOf(EliteMatrix);
+        done();
+      });
+    });
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+    Settings.destroy();
+  });
 });