Fixed DectoBinConverter file name and added tests.

src/app/converter-registry.service.ts

@@ -2,7 +2,7 @@ import {Base64Decoder} from './converter/base64-decoder';
 import {Base64Encoder} from './converter/base64-encoder';
 import {BinToDecConverter} from './converter/bin-to-dec-converter';
 import {Converter} from './converter/converter';
-import {DecToBinConverter} from './converter/dectobinconverter';
+import {DecToBinConverter} from './converter/dec-to-bin-converter';
 import {DecToHexConverter} from './converter/dectohexconverter';
 import {HexToDecConverter} from './converter/hextodecconverter';
 import {HTMLEntitiesDecoder} from './converter/htmlentitiesdecoder';

src/app/converter/dec-to-bin-converter.spec.ts

@@ -0,0 +1,16 @@
+import {DecToBinConverter} from './dec-to-bin-converter';
+
+describe('DecToBinConverter', () => {
+  it('should create an instance', () => {
+    expect(new DecToBinConverter()).toBeTruthy();
+  });
+  it('should have the id "base64encode"', () => {
+    expect(new DecToBinConverter().getId()).toEqual('dectobin');
+  });
+  it('should convert "22" to "10110"', () => {
+    expect(new DecToBinConverter().convert('22')).toEqual('10110');
+  });
+  it('should raise an exception on invalid input', () => {
+    expect(() => new DecToBinConverter().convert('foo bar')).toThrowError('The input seems not to be a valid integer.');
+  });
+});