refactor: Restructure source code folder

This way the location of certain classes should make more sense

test/unit/http/input/conditions/BasicConditionsParser.test.ts

@@ -0,0 +1,60 @@
+import { BasicConditionsParser } from '../../../../../src/http/input/conditions/BasicConditionsParser';
+import type { HttpRequest } from '../../../../../src/server/HttpRequest';
+
+describe('A BasicConditionsParser', (): void => {
+  const dateString = 'Wed, 21 Oct 2015 07:28:00 UTC';
+  const date = new Date('2015-10-21T07:28:00.000Z');
+  let request: HttpRequest;
+  const parser = new BasicConditionsParser();
+
+  beforeEach(async(): Promise<void> => {
+    request = { headers: {}, method: 'GET' } as HttpRequest;
+  });
+
+  it('returns undefined if there are no relevant headers.', async(): Promise<void> => {
+    await expect(parser.handleSafe(request)).resolves.toBeUndefined();
+  });
+
+  it('parses the if-modified-since header.', async(): Promise<void> => {
+    request.headers['if-modified-since'] = dateString;
+    await expect(parser.handleSafe(request)).resolves.toEqual({ modifiedSince: date });
+  });
+
+  it('parses the if-unmodified-since header.', async(): Promise<void> => {
+    request.headers['if-unmodified-since'] = dateString;
+    await expect(parser.handleSafe(request)).resolves.toEqual({ unmodifiedSince: date });
+  });
+
+  it('parses the if-match header.', async(): Promise<void> => {
+    request.headers['if-match'] = '"1234567", "abcdefg"';
+    await expect(parser.handleSafe(request)).resolves.toEqual({ matchesETag: [ '"1234567"', '"abcdefg"' ]});
+  });
+
+  it('parses the if-none-match header.', async(): Promise<void> => {
+    request.headers['if-none-match'] = '*';
+    await expect(parser.handleSafe(request)).resolves.toEqual({ notMatchesETag: [ '*' ]});
+  });
+
+  it('does not parse the if-modified-since header if there is an if-none-match header.', async(): Promise<void> => {
+    request.headers['if-modified-since'] = dateString;
+    request.headers['if-none-match'] = '*';
+    await expect(parser.handleSafe(request)).resolves.toEqual({ notMatchesETag: [ '*' ]});
+  });
+
+  it('only parses the if-modified-since header for GET and HEAD requests.', async(): Promise<void> => {
+    request.headers['if-modified-since'] = dateString;
+    request.method = 'PUT';
+    await expect(parser.handleSafe(request)).resolves.toBeUndefined();
+  });
+
+  it('does not parse the if-unmodified-since header if there is an if-match header.', async(): Promise<void> => {
+    request.headers['if-unmodified-since'] = dateString;
+    request.headers['if-match'] = '*';
+    await expect(parser.handleSafe(request)).resolves.toEqual({ matchesETag: [ '*' ]});
+  });
+
+  it('ignores invalid dates.', async(): Promise<void> => {
+    request.headers['if-modified-since'] = 'notADate';
+    await expect(parser.handleSafe(request)).resolves.toBeUndefined();
+  });
+});