userscripts-snippet/base/makeTextHistogram.test.js at main · userscripts-manager/userscripts-snippet · GitHub

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describe('makeTextHistogram', () => {
    it('should create a text histogram from an object of counts', () => {
        const data = { apple: 10, banana: 5, cherry: 15 }
        const histogram = makeTextHistogram(data)
        const expected = ` apple | █████████████ 10
banana | ███████ 5
cherry | ████████████████████ 15`
        expect(histogram).toBe(expected)
    })
    it('should use the specified character for the bars', () => {
        const data = { apple: 10, banana: 5, cherry: 15 }
        const histogram = makeTextHistogram(data, { char: '#' })
        const expected = ` apple | ############# 10
banana | ####### 5
cherry | #################### 15`
        expect(histogram).toBe(expected)
    })
    it('should limit the length of the bars to the specified maximum', () => {
        const data = { apple: 10, banana: 5, cherry: 15 }
        const histogram = makeTextHistogram(data, { length: 10 })
        const expected = ` apple | ███████ 10
banana | ███ 5
cherry | ██████████ 15`
        expect(histogram).toBe(expected)
    })
    it('should sort the entries by the specified function', () => {
        const data = { cherry: 15, apple: 10, banana: 5 }
        const histogram = makeTextHistogram(data, { sortBy: (key, value) => value })
        const expected = `banana | ███████ 5
 apple | █████████████ 10
cherry | ████████████████████ 15`
        expect(histogram).toBe(expected)
    })
    it('should sort the entries by the specified function (other function)', () => {
        const data = { cherry: 15, apple: 10, banana: 5 }
        const histogram = makeTextHistogram(data, { sortBy: (key, value) => key })
        const expected = ` apple | █████████████ 10
banana | ███████ 5
cherry | ████████████████████ 15`
        expect(histogram).toBe(expected)
    })
    it('should handle an empty object', () => {
        const data = {}
        const histogram = makeTextHistogram(data)
        const expected = ``
        expect(histogram).toBe(expected)
    })
    it('should handle values of zero', () => {
        const data = { apple: 0, banana: 5, cherry: 10 }
        const histogram = makeTextHistogram(data)
        const expected = ` apple |  0
banana | ██████████ 5
cherry | ████████████████████ 10`
        expect(histogram).toBe(expected)
    })
    it('should handle all values being the same', () => {
        const data = { apple: 10, banana: 10, cherry: 10 }
        const histogram = makeTextHistogram(data)
        const expected = ` apple | ████████████████████ 10
banana | ████████████████████ 10
cherry | ████████████████████ 10`
        expect(histogram).toBe(expected)
    })

})