feat(utility): add small utility functions

Author: TimoBechtel

src/utility.ts

@@ -0,0 +1,26 @@
+import { Noun } from './noun';
+import { Writable } from './textHelper';
+
+export function within(word: Noun): Writable {
+	return {
+		write() {
+			return `in ${word.dative().write()}`;
+		},
+	};
+}
+
+export function into(word: Noun): Writable {
+	return {
+		write() {
+			return `in ${word.accusative().write()}`;
+		},
+	};
+}
+
+export function to(word: Noun): Writable {
+	return {
+		write() {
+			return `zu ${word.dative().write()}`;
+		},
+	};
+}

test/utility.test.ts

@@ -0,0 +1,12 @@
+import { noun } from '../src/noun';
+import { into, to, within } from '../src/utility';
+
+test('provides aliases', () => {
+	const car = noun('das Haus,häuser,-es');
+	expect(within(car).write()).toBe('in einem Haus');
+	expect(within(car.specific()).write()).toBe('in dem Haus');
+
+	expect(into(car).write()).toBe('in ein Haus');
+
+	expect(to(car).write()).toBe('zu einem Haus');
+});