chore: maintenance

utils/__test__/getAge.test.ts

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+import { getAge } from '../getAge'
+
+describe('utils/getAge', () => {
+  it('should calculate the right age of a person', () => {
+    const birthDate = new Date('1980-02-20')
+    jest.useFakeTimers().setSystemTime(new Date('2018-03-20'))
+    expect(getAge(birthDate)).toBe(38)
+  })
+
+  it('should calculate the right age of a person (taking into account the months)', () => {
+    const birthDate = new Date('1980-07-20')
+    jest.useFakeTimers().setSystemTime(new Date('2018-03-20'))
+    expect(getAge(birthDate)).toBe(37)
+  })
+})

utils/getAge.ts

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+export const DIVLO_BIRTHDAY = new Date('2003-03-31')
+
+/**
+ * Calculates the age of a person based on their birth date
+ * @param birthDate
+ * @returns
+ */
+export const getAge = (birthDate: Date): number => {
+  const today = new Date()
+  let age = today.getFullYear() - birthDate.getFullYear()
+  const month = today.getMonth() - birthDate.getMonth()
+  if (month < 0 || (month === 0 && today.getDate() < birthDate.getDate())) {
+    age--
+  }
+  return age
+}

utils/getDefaultDescription.ts

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+import { DIVLO_BIRTHDAY, getAge } from './getAge'
+
+export const getDefaultDescription = (): string => {
+  const age = getAge(DIVLO_BIRTHDAY)
+  return `I'm Divlo, I'm ${age} years old, I'm from France - Developer Full Stack Junior • Passionate about High-Tech`
+}