Fixed HTMLEntities{De,En}coder file names and added tests.

src/app/converter-registry.service.ts

@@ -5,8 +5,8 @@ import {Converter} from './converter/converter';
 import {DecToBinConverter} from './converter/dec-to-bin-converter';
 import {DecToHexConverter} from './converter/dec-to-hex-converter';
 import {HexToDecConverter} from './converter/hex-to-dec-converter';
-import {HTMLEntitiesDecoder} from './converter/htmlentitiesdecoder';
+import {HTMLEntitiesDecoder} from './converter/htmlentities-decoder';
-import {HTMLEntitiesEncoder} from './converter/htmlentitiesencoder';
+import {HTMLEntitiesEncoder} from './converter/htmlentities-encoder';
 import {Injectable} from '@angular/core';
 import {NativeLibraryWrapperService} from './native-library-wrapper.service';
 import {PunycodeDecoder} from './converter/punycodedecoder';

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

@@ -0,0 +1,14 @@
+import {HTMLEntitiesDecoder} from './htmlentities-decoder';
+
+describe('HTMLEntitiesDecoder', () => {
+  it('should create an instance', () => {
+    expect(new HTMLEntitiesDecoder()).toBeTruthy();
+  });
+  it('should have the id "decodehtmlentities"', () => {
+    expect(new HTMLEntitiesDecoder().getId()).toEqual('decodehtmlentities');
+  });
+  it('should decode "&lt;span&gt;&quot;Hi&quot; &amp; &quot;Lo&quot;&lt;/span&gt;" to "<span>"Hi" & "Lo"</span>"', () => {
+    expect(new HTMLEntitiesDecoder().convert('&lt;span&gt;&quot;Hi&quot; &amp; &quot;Lo&quot;&lt;/span&gt;'))
+      .toEqual('<span>"Hi" & "Lo"</span>');
+  });
+});

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

@@ -0,0 +1,14 @@
+import {HTMLEntitiesEncoder} from './htmlentities-encoder';
+
+describe('HTMLEntitiesEncoder', () => {
+  it('should create an instance', () => {
+    expect(new HTMLEntitiesEncoder()).toBeTruthy();
+  });
+  it('should have the id "encodehtmlentities"', () => {
+    expect(new HTMLEntitiesEncoder().getId()).toEqual('encodehtmlentities');
+  });
+  it('should encode "<span>"Hi" & "Lo"</span>" to "&lt;span&gt;&quot;Hi&quot; &amp; &quot;Lo&quot;&lt;/span&gt;"', () => {
+    expect(new HTMLEntitiesEncoder().convert('<span>"Hi" & "Lo"</span>'))
+      .toEqual('&lt;span&gt;&quot;Hi&quot; &amp; &quot;Lo&quot;&lt;/span&gt;');
+  });
+});