math_test.go

package math

import "testing"

func TestCalculateFee(t *testing.T) {
	t.Parallel()
	originalInput := float64(1)
	fee := float64(1)
	expectedOutput := float64(0.01)
	actualResult := CalculateFee(originalInput, fee)
	if expectedOutput != actualResult {
		t.Errorf(
			"Expected '%f'. Actual '%f'.", expectedOutput, actualResult)
	}
}

func TestCalculateAmountWithFee(t *testing.T) {
	t.Parallel()
	originalInput := float64(1)
	fee := float64(1)
	expectedOutput := float64(1.01)
	actualResult := CalculateAmountWithFee(originalInput, fee)
	if expectedOutput != actualResult {
		t.Errorf(
			"Expected '%f'. Actual '%f'.", expectedOutput, actualResult)
	}
}

func TestCalculatePercentageGainOrLoss(t *testing.T) {
	t.Parallel()
	originalInput := float64(9300)
	secondInput := float64(9000)
	expectedOutput := 3.3333333333333335
	actualResult := CalculatePercentageGainOrLoss(originalInput, secondInput)
	if expectedOutput != actualResult {
		t.Errorf(
			"Expected '%f'. Actual '%f'.", expectedOutput, actualResult)
	}
}

func TestCalculatePercentageDifference(t *testing.T) {
	t.Parallel()
	originalInput := float64(10)
	secondAmount := float64(5)
	expectedOutput := 66.66666666666666
	actualResult := CalculatePercentageDifference(originalInput, secondAmount)
	if expectedOutput != actualResult {
		t.Errorf(
			"Expected '%f'. Actual '%f'.", expectedOutput, actualResult)
	}
}

func TestCalculateNetProfit(t *testing.T) {
	t.Parallel()
	amount := float64(5)
	priceThen := float64(1)
	priceNow := float64(10)
	costs := float64(1)
	expectedOutput := float64(44)
	actualResult := CalculateNetProfit(amount, priceThen, priceNow, costs)
	if expectedOutput != actualResult {
		t.Errorf(
			"Expected '%f'. Actual '%f'.", expectedOutput, actualResult)
	}
}

func TestRoundFloat(t *testing.T) {
	t.Parallel()
	// mapping of input vs expected result
	testTable := map[float64]float64{
		2.3232323:  2.32,
		-2.3232323: -2.32,
	}
	for testInput, expectedOutput := range testTable {
		actualOutput := RoundFloat(testInput, 2)
		if actualOutput != expectedOutput {
			t.Errorf("RoundFloat Expected '%f'. Actual '%f'.",
				expectedOutput, actualOutput)
		}
	}
}