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Test: improve test coverage of Calculator class from 83% to 96% #114

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test: improve test coverage from 83% to 96%
GustavoMartinx May 1, 2025
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GustavoMartinx May 1, 2025
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258 changes: 150 additions & 108 deletions src/simplejavacalculatorTest/CalculatorTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,117 +3,159 @@
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import static java.lang.Double.NaN;
import java.lang.Math;


import simplejavacalculator.Calculator;

class CalculatorTest {

@Test
void calculateBiNormalTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.normal, 2.0);
Assertions.assertEquals(NaN, calculator.calculateBi(Calculator.BiOperatorModes.normal, 3.0));
}

@Test
void calculateBiAddTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.add, 3.0);
Assertions.assertEquals(5.5, calculator.calculateBi(Calculator.BiOperatorModes.normal, 2.5));
}

@Test
void calculateBiMinusTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.minus, 3.1415);
Assertions.assertEquals(2.0415, calculator.calculateBi(Calculator.BiOperatorModes.normal, 1.1));
}

@Test
void calculateBiMultiplyTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.multiply, 3.2);
Assertions.assertEquals(6.4, calculator.calculateBi(Calculator.BiOperatorModes.normal, 2.0));
}

@Test
void calculateBiDivideTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.divide, 6.4);
Assertions.assertEquals(3.2, calculator.calculateBi(Calculator.BiOperatorModes.normal, 2.0));
}

@Test
void calculateEqualTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.add, 6.4);
calculator.calculateBi(Calculator.BiOperatorModes.add, 2.0);
Assertions.assertEquals(11.4, calculator.calculateEqual(3.0));
}

@Test
void resetTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.add, 6.4);
Assertions.assertEquals(8.4, calculator.calculateBi(Calculator.BiOperatorModes.add, 2.0));
Assertions.assertEquals(NaN, calculator.reset());
}

@Test
void CalculateMonoSquareTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(9.0, calculator.calculateMono(Calculator.MonoOperatorModes.square, 3.0));
}

@Test
void CalculateMonoSquareRootTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(5.0, calculator.calculateMono(Calculator.MonoOperatorModes.squareRoot, 25.0));
}

@Test
void CalculateMonoOneDividedByTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(0.10, calculator.calculateMono(Calculator.MonoOperatorModes.oneDividedBy, 10.0));
}

@Test
void CalculateMonoSinTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(0.5, calculator.calculateMono(Calculator.MonoOperatorModes.sin, java.lang.Math.PI / 6), 0.0000000001);
}

@Test
void CalculateMonoCosTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(0.5, calculator.calculateMono(Calculator.MonoOperatorModes.cos, java.lang.Math.PI / 3), 0.0000000001);
}

@Test
void CalculateMonoTanTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(1.0, calculator.calculateMono(Calculator.MonoOperatorModes.tan, java.lang.Math.PI / 4), 0.0000000001);
}

@Test
void CalculateMonoLogTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(2.0, calculator.calculateMono(Calculator.MonoOperatorModes.log, 100.0));
}

@Test
void CalculateMonoRateTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(.75, calculator.calculateMono(Calculator.MonoOperatorModes.rate, 75.0));
}

@Test
void CalculateMonoAbsTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(3.0, calculator.calculateMono(Calculator.MonoOperatorModes.abs, -3.0));
Assertions.assertEquals(3.0, calculator.calculateMono(Calculator.MonoOperatorModes.abs, 3.0));
}

// Tests the "x to the power of y" binary operation
@Test
void calculateBiXPowerYTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.xpowerofy, 2.0);
Assertions.assertEquals(8.0, calculator.calculateBi(Calculator.BiOperatorModes.normal, 3.0)); // 2^3
}

// Tests natural logarithm (ln) of 1, which should be 0
@Test
void calculateMonoLnTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(0, calculator.calculateMono(Calculator.MonoOperatorModes.ln, 1.0)); // ln(1)
}

// Tests tangent of 90 degrees, which is undefined (NaN)
@Test
void calculateMonoTanUndefinedTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(NaN, calculator.calculateMono(Calculator.MonoOperatorModes.tan, 90.0)); // tan(90)
}

// Tests tangent of 0, which should be 0
@Test
void calculateMonoTanZeroZeroTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(0.0, calculator.calculateMono(Calculator.MonoOperatorModes.tan, 0.0)); // tan(0)
}

// Tests tangent of 180, which should be 0
@Test
void calculateMonoTan180ZeroTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(0.0, calculator.calculateMono(Calculator.MonoOperatorModes.tan, 180.0)); // tan(180)
}

// Tests logarithm base 10 of 0, which should be negative infinity
@Test
void calculateMonoLogZeroTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(Double.NEGATIVE_INFINITY, calculator.calculateMono(Calculator.MonoOperatorModes.log, 0.0)); // log(0)
}

// Tests logarithm base 10 of a negative number, which is undefined (NaN)
@Test
void calculateMonoLogNegativeTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(NaN, calculator.calculateMono(Calculator.MonoOperatorModes.log, -2.0)); // log(-2)
}

// Tests natural logarithm of a negative number, which is undefined (NaN)
@Test
void calculateMonoLnNegativeTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(NaN, calculator.calculateMono(Calculator.MonoOperatorModes.ln, -3.0)); // ln(-3)
}

// Tests natural logarithm of 0, which should be negative infinity
@Test
void calculateMonoLnZeroTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(Double.NEGATIVE_INFINITY, calculator.calculateMono(Calculator.MonoOperatorModes.ln, 0.0)); // ln(0)
}

// Tests reciprocal operation (1/x) with 0, which is undefined (NaN)
@Test
void calculateMonoDivideByZeroTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(NaN, calculator.calculateMono(Calculator.MonoOperatorModes.oneDividedBy, 0.0)); // 1/0
}

// Tests division by 0 using binary operation, which is undefined (NaN)
@Test
void calculateBiDivideTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.divide, 10.0);
Assertions.assertEquals(NaN, calculator.calculateBi(Calculator.BiOperatorModes.normal, 0.0)); // 10/0
}

// Tests a sequence of binary operations ending with multiplication
@Test
void testMultipleOperationsChain() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.add, 2.0); // 2
calculator.calculateBi(Calculator.BiOperatorModes.multiply, 3.0); // 2 * 3 = 6
Assertions.assertEquals(18.0, calculator.calculateEqual(3.0)); // 6 * 3 = 18
}

// Tests square root of a negative number, which is undefined (NaN)
@Test
void calculateMonoSqrtNegativeTest() {
Calculator calculator = new Calculator();
Assertions.assertEquals(NaN, calculator.calculateMono(Calculator.MonoOperatorModes.squareRoot, -9.0)); // sqrt(-9)
}

// Tests equality after addition
@Test
void testEqualAfterAddition() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.add, 5.0);
Assertions.assertEquals(10.0, calculator.calculateEqual(5.0)); // 5 + 5
}

// Tests equality after subtraction
@Test
void testEqualAfterSubtraction() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.minus, 8.0);
Assertions.assertEquals(3.0, calculator.calculateEqual(5.0)); // 8 - 5
}

// Tests equality after multiplication
@Test
void testEqualAfterMultiplication() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.multiply, 4.0);
Assertions.assertEquals(20.0, calculator.calculateEqual(5.0)); // 4 * 5
}

// Tests equality after division
@Test
void testEqualAfterDivision() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.divide, 10.0);
Assertions.assertEquals(2.0, calculator.calculateEqual(5.0)); // 10 / 5
}

// Tests equality after exponentiation
@Test
void testEqualAfterPower() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.xpowerofy, 2.0);
Assertions.assertEquals(32.0, calculator.calculateEqual(5.0)); // 2^5
}

// Tests normal binary operation mode (should return NaN)
@Test
void testNormalOperation() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.normal, 5.0);
Assertions.assertEquals(NaN, calculator.calculateEqual(5.0));
}

// Tests addition followed by immediate evaluation (normal mode)
@Test
void calculateBiAddTest() {
Calculator calculator = new Calculator();
calculator.calculateBi(Calculator.BiOperatorModes.add, 2.5);
Assertions.assertEquals(2.5, calculator.calculateBi(Calculator.BiOperatorModes.normal, 0.0)); // 2.5 + 0
}
}