Allergies

typescript/allergies/allergies.test.ts

@@ -0,0 +1,115 @@
+import { describe, it, expect } from '@jest/globals'
+import { Allergies } from './allergies.ts'
+
+describe('allergicTo', () => {
+  it('no allergies means not allergic', () => {
+    const allergies = new Allergies(0)
+
+    expect(allergies.allergicTo('peanuts')).toBeFalsy()
+    expect(allergies.allergicTo('cats')).toBeFalsy()
+    expect(allergies.allergicTo('strawberries')).toBeFalsy()
+  })
+
+  it('is allergic to eggs', () => {
+    const allergies = new Allergies(1)
+
+    expect(allergies.allergicTo('eggs')).toBeTruthy()
+  })
+
+  it('allergic to eggs in addition to other stuff', () => {
+    const allergies = new Allergies(5)
+
+    expect(allergies.allergicTo('eggs')).toBeTruthy()
+    expect(allergies.allergicTo('shellfish')).toBeTruthy()
+    expect(allergies.allergicTo('strawberries')).toBeFalsy()
+  })
+})
+
+describe('list', () => {
+  it('no allergies at all', () => {
+    const allergies = new Allergies(0)
+    const expected: string[] = []
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  it('allergic to just eggs', () => {
+    const allergies = new Allergies(1)
+    const expected = ['eggs']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  it('allergic to just peanuts', () => {
+    const allergies = new Allergies(2)
+    const expected = ['peanuts']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  it('allergic to just strawberries', () => {
+    const allergies = new Allergies(8)
+    const expected = ['strawberries']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  it('allergic to eggs and peanuts', () => {
+    const allergies = new Allergies(3)
+    const expected = ['eggs', 'peanuts']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  it('allergic to more than eggs but not peanuts', () => {
+    const allergies = new Allergies(5)
+    const expected = ['eggs', 'shellfish']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  it('allergic to lots of stuff', () => {
+    const allergies = new Allergies(248)
+    const expected = ['strawberries', 'tomatoes', 'chocolate', 'pollen', 'cats']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  it('allergic to everything', () => {
+    const allergies = new Allergies(255)
+    const expected = [
+      'eggs',
+      'peanuts',
+      'shellfish',
+      'strawberries',
+      'tomatoes',
+      'chocolate',
+      'pollen',
+      'cats',
+    ]
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  it('ignore non allergen score parts', () => {
+    const allergies = new Allergies(509)
+    const expected = [
+      'eggs',
+      'shellfish',
+      'strawberries',
+      'tomatoes',
+      'chocolate',
+      'pollen',
+      'cats',
+    ]
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  it('ignore non allergen score parts, without highest valid score', () => {
+    const allergies = new Allergies(257)
+    const expected = ['eggs']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+})