src/app/converter-registry.service.ts

@@ -1,6 +1,6 @@
 import {Base64Decoder} from './converter/base64-decoder';
 import {Base64Encoder} from './converter/base64-encoder';
-import {BinToDecConverter} from './converter/bintodecconverter';
+import {BinToDecConverter} from './converter/bin-to-dec-converter';
 import {Converter} from './converter/converter';
 import {DecToBinConverter} from './converter/dectobinconverter';
 import {DecToHexConverter} from './converter/dectohexconverter';

src/app/converter/base64-decoder.spec.ts

@@ -10,4 +10,7 @@ describe('Base64Decoder', () => {
   it('should decode "SGVsbG8sIFdvcmxkIQ==" to "Hello, World!"', () => {
     expect(new Base64Decoder().convert('SGVsbG8sIFdvcmxkIQ==')).toEqual('Hello, World!');
   });
+  it('should raise an exception on invalid input', () => {
+    expect(() => new Base64Decoder().convert('foo bar.')).toThrowError('Could not decode base64 string. Maybe corrupt input?');
+  });
 });

src/app/converter/base64-encoder.spec.ts

@@ -10,4 +10,7 @@ describe('Base64Encoder', () => {
   it('should encode "Oh, guete Tag!" to "T2gsIGd1ZXRlIFRhZyE="', () => {
     expect(new Base64Encoder().convert('Oh, guete Tag!')).toEqual('T2gsIGd1ZXRlIFRhZyE=');
   });
+  it('should raise an exception on invalid input', () => {
+    expect(() => new Base64Encoder().convert('€')).toThrowError(/Looks like you've got a character outside of the Latin1 range there./);
+  });
 });

src/app/converter/base64-encoder.ts

@@ -14,7 +14,7 @@ export class Base64Encoder implements Converter {
       return btoa(input);
     } catch (exception) {
       console.error(exception);
-      throw new Error('Ouch! Looks like you\'ve got a UTF-8 character there. Too bad, this is not supported yet. '
+      throw new Error('Ouch! Looks like you\'ve got a character outside of the Latin1 range there. Too bad, this is not supported yet. '
         + 'We\'re working on it and hope to be ready soon! Why don\'t you '
         + '<a href="https://duckduckgo.com/?q=cute+kitties&iar=images">enjoy some kittens</a> meanwhile?');
     }

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

@@ -0,0 +1,16 @@
+import {BinToDecConverter} from './bin-to-dec-converter';
+
+describe('BinToDecConverter', () => {
+  it('should create an instance', () => {
+    expect(new BinToDecConverter()).toBeTruthy();
+  });
+  it('should have the id "base64encode"', () => {
+    expect(new BinToDecConverter().getId()).toEqual('bintodec');
+  });
+  it('should convert "11011" to "27"', () => {
+    expect(new BinToDecConverter().convert('11011')).toEqual('27');
+  });
+  it('should raise an exception on invalid input', () => {
+    expect(() => new BinToDecConverter().convert('foo bar')).toThrowError('The input seems not to be a valid binary number.');
+  });
+});