add logging and unit tests (#117)

* add logging and unit tests

* fix logging msg spell for notification

tests/log.test.js

@@ -0,0 +1,56 @@
+const { Logger } = require('../js/log.js');
+
+describe('logger tests', function() {
+    let log;
+
+    beforeEach(function() {
+        // get new rewired version for each test.
+        log = new Logger();
+    });
+
+    it('when no logger registered then queue items', function() {
+        log.send('DEBUG', 'test');
+        log.send('DEBUG', 'test2');
+        let queue = log.logQueue;
+        expect(queue.length).toBe(2);
+    });
+
+    it('flush queue when logger get registered', function() {
+        log.send('DEBUG', 'test');
+        log.send('DEBUG', 'test2');
+
+        let mockWin = {
+            send: jest.fn()
+        };
+
+        log.setLogWindow(mockWin);
+
+        let queue = log.logQueue;
+
+        expect(mockWin.send).toHaveBeenCalled();
+        expect(queue.length).toBe(0);
+    });
+
+    it('send single log msg logger has already been registered', function() {
+        let mockWin = {
+            send: jest.fn()
+        };
+
+        log.setLogWindow(mockWin);
+        log.send('DEBUG', 'test');
+
+        let queue = log.logQueue;
+
+        expect(mockWin.send).toHaveBeenCalled();
+        expect(queue.length).toBe(0);
+    });
+
+    it('should cap at 100 queued log messages', function() {
+        for(let i = 0; i < 110; i++) {
+            log.send('DEBUG', 'test' + i);
+        }
+
+        let queue = log.logQueue;
+        expect(queue.length).toBe(100);
+    })
+});

tests/utils/getCmdLineArg.test.js

@@ -0,0 +1,28 @@
+const getCmdLineArg = require('../../js/utils/getCmdLineArg.js');
+
+describe('getCmdLineArg tests', function() {
+    it('should return no exact match', function() {
+        var result = getCmdLineArg([ 'hello.exe', '--arg1', '--arg2'], '--arg', true);
+        expect(result).toBe(null);
+    });
+
+    it('should return exact match only', function() {
+        var result = getCmdLineArg([ 'hello.exe', '--arg1', '--arg2'], '--arg2', true);
+        expect(result).toBe('--arg2');
+    });
+
+    it('should return starts with match', function() {
+        var result = getCmdLineArg([ 'hello.exe', '--hello=test', '--arg2'], '--hello=');
+        expect(result).toBe('--hello=test');
+    });
+
+    it('should return no match for starts with', function() {
+        var result = getCmdLineArg([ 'hello.exe', '--hello=test', '--arg2'], '--help=');
+        expect(result).toBe(null);
+    });
+
+    it('should return no match invalid argv given', function() {
+        var result = getCmdLineArg('invalid argv', '--help=');
+        expect(result).toBe(null);
+    });
+});