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smx.pusha
53 lines
1.9 KiB
TypeScript
53 lines
1.9 KiB
TypeScript
import { describe, expect, it } from 'vitest'
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import {
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applyCalculatorUnary,
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calculate,
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chooseCalculatorOperator,
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clearCalculator,
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inputDigit,
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resolveCalculator,
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} from './calculator'
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describe('calculator', () => {
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it('calculates all four operations', () => {
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expect(calculate(8, 2, 'add')).toBe(10)
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expect(calculate(8, 2, 'subtract')).toBe(6)
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expect(calculate(8, 2, 'multiply')).toBe(16)
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expect(calculate(8, 2, 'divide')).toBe(4)
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})
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it('calculates scientific unary and binary operations', () => {
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expect(calculate(2, 8, 'power')).toBe(256)
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expect(calculate(3, 27, 'root')).toBe(3)
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expect(applyCalculatorUnary(5, 'factorial')).toBe(120)
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expect(applyCalculatorUnary(90, 'sin', 'degrees')).toBeCloseTo(1)
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expect(applyCalculatorUnary(9, 'sqrt')).toBe(3)
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expect(applyCalculatorUnary(-1, 'sqrt')).toBeNull()
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})
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it('chains operations and handles division by zero', () => {
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let state = inputDigit(clearCalculator(), '8')
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state = chooseCalculatorOperator(state, 'add')
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expect(state.calculation).toBe('8 +')
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state = inputDigit(state, '2')
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state = chooseCalculatorOperator(state, 'multiply')
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expect(state.display).toBe('10')
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expect(state.calculation).toBe('8 + 2 ×')
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state = inputDigit(state, '3')
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state = resolveCalculator(state)
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expect(state.display).toBe('30')
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expect(state.calculation).toBe('8 + 2 × 3 =')
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expect(calculate(4, 0, 'divide')).toBeNull()
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})
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it('replaces a pending operator and clears completed history on new input', () => {
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let state = inputDigit(clearCalculator(), '9')
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state = chooseCalculatorOperator(state, 'add')
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state = chooseCalculatorOperator(state, 'subtract')
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expect(state.calculation).toBe('9 −')
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state = inputDigit(state, '3')
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state = resolveCalculator(state)
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expect(state.calculation).toBe('9 − 3 =')
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expect(inputDigit(state, '4').calculation).toBe('')
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})
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})
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