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@@ -0,0 +1,46 @@
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+import { describe, it, expect } from '@jest/globals';
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+import { parseLatitude, parseLongitude } from './coordinates';
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+
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+describe('parsing latitude from string input', () => {
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+ it('returns null for invalid inputs', () => {
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+ expect(parseLatitude('')).toBeNull();
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+ expect(parseLatitude('NaN')).toBeNull();
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+ expect(parseLatitude('Infinity')).toBeNull();
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+ expect(parseLatitude('-Infinity')).toBeNull();
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+ expect(parseLatitude('90.001')).toBeNull();
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+ expect(parseLatitude('-90.000001')).toBeNull();
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+ expect(parseLatitude('1000')).toBeNull();
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+ expect(parseLatitude('-1000')).toBeNull();
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+ });
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+
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+ it('returns the numeric coordinate for valid inputs', () => {
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+ expect(parseLatitude('90')).toBeCloseTo(90);
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+ expect(parseLatitude('-90')).toBeCloseTo(-90);
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+ expect(parseLatitude('89.999999')).toBeCloseTo(89.999999);
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+ expect(parseLatitude('-89.9')).toBeCloseTo(-89.9);
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+ expect(parseLatitude('0')).toBeCloseTo(0);
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+ expect(parseLatitude('-0.0')).toBeCloseTo(-0.0);
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+ });
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+});
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+
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+describe('parsing longitude from string input', () => {
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+ it('returns null for invalid inputs', () => {
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+ expect(parseLongitude('')).toBeNull();
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+ expect(parseLongitude('NaN')).toBeNull();
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+ expect(parseLongitude('Infinity')).toBeNull();
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+ expect(parseLongitude('-Infinity')).toBeNull();
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+ expect(parseLongitude('180.001')).toBeNull();
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+ expect(parseLongitude('-180.000001')).toBeNull();
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+ expect(parseLongitude('1000')).toBeNull();
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+ expect(parseLongitude('-1000')).toBeNull();
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+ });
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+
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+ it('returns the numeric coordinate for valid inputs', () => {
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+ expect(parseLongitude('180')).toBeCloseTo(180);
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+ expect(parseLongitude('-180')).toBeCloseTo(-180);
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+ expect(parseLongitude('179.999999')).toBeCloseTo(179.999999);
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+ expect(parseLongitude('-179.9')).toBeCloseTo(-179.9);
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+ expect(parseLongitude('0')).toBeCloseTo(0);
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+ expect(parseLongitude('-0.0')).toBeCloseTo(-0.0);
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+ });
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+});
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