Refactoring Extract Method(Solution 2)

extract-method-solution2.ts

class LongMethod {
    quantity: number = 10
    itemPrice: number = 34.0

    calculateTotal() {
        const basePrice = this.quantity * this.itemPrice
        if (basePrice > 500) {
            return basePrice * 0.95
        }
        return basePrice * 0.98
    }
}

const longMethodExample = new LongMethod()

console.log(longMethodExample.calculateTotal())

class ExtractMethod {
    quantity: number = 10
    itemPrice: number = 34.0

    calculateTotal() {
        if (this.basePrice() > 500) {
            return this.basePrice() * 0.95
        }
        return this.basePrice() * 0.98
    }

    basePrice(): number {
        return this.quantity * this.itemPrice
    }
}

const extractMethodExample = new LongMethod()

console.log(extractMethodExample.calculateTotal())