Add DisplayName annotations to rational-numbers

Author: bibekparajuli123

exercises/practice/rational-numbers/src/test/java/RationalTest.java

@@ -1,4 +1,5 @@
 import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -17,6 +18,7 @@ private void assertDoublesEqual(double x, double y) {
     // Tests
 
     @Test
+    @DisplayName("Add two positive rational numbers")
     public void testAddTwoPositiveRationalNumbers() {
         Rational expected = new Rational(7, 6);
         Rational actual = new Rational(1, 2).add(new Rational(2, 3));
@@ -25,6 +27,7 @@ public void testAddTwoPositiveRationalNumbers() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Add a positive rational number and a negative rational number")
     public void testAddAPositiveRationalNumberAndANegativeRationalNumber() {
         Rational expected = new Rational(-1, 6);
         Rational actual = new Rational(1, 2).add(new Rational(-2, 3));
@@ -33,6 +36,7 @@ public void testAddAPositiveRationalNumberAndANegativeRationalNumber() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Add two negative rational numbers")
     public void testAddTwoNegativeRationalNumbers() {
         Rational expected = new Rational(-7, 6);
         Rational actual = new Rational(-1, 2).add(new Rational(-2, 3));
@@ -41,6 +45,7 @@ public void testAddTwoNegativeRationalNumbers() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Add a rational number to its additive inverse")
     public void testAddARationalNumberToItsAdditiveInverse() {
         Rational expected = new Rational(0, 1);
         Rational actual = new Rational(1, 2).add(new Rational(-1, 2));
@@ -49,6 +54,7 @@ public void testAddARationalNumberToItsAdditiveInverse() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Subtract two positive rational numbers")
     public void testSubtractTwoPositiveRationalNumbers() {
         Rational expected = new Rational(-1, 6);
         Rational actual = new Rational(1, 2).subtract(new Rational(2, 3));
@@ -57,6 +63,7 @@ public void testSubtractTwoPositiveRationalNumbers() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Subtract a positive rational number and a negative rational number")
     public void testSubtractAPositiveRationalNumberAndANegativeRationalNumber() {
         Rational expected = new Rational(7, 6);
         Rational actual = new Rational(1, 2).subtract(new Rational(-2, 3));
@@ -65,6 +72,7 @@ public void testSubtractAPositiveRationalNumberAndANegativeRationalNumber() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Subtract two negative rational numbers")
     public void testSubtractTwoNegativeRationalNumbers() {
         Rational expected = new Rational(1, 6);
         Rational actual = new Rational(-1, 2).subtract(new Rational(-2, 3));
@@ -73,6 +81,7 @@ public void testSubtractTwoNegativeRationalNumbers() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Subtract a rational number from itself")
     public void testSubtractARationalNumberFromItself() {
         Rational expected = new Rational(0, 1);
         Rational actual = new Rational(1, 2).subtract(new Rational(1, 2));
@@ -81,6 +90,7 @@ public void testSubtractARationalNumberFromItself() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Multiply two positive rational numbers")
     public void testMultiplyTwoPositiveRationalNumbers() {
         Rational expected = new Rational(1, 3);
         Rational actual = new Rational(1, 2).multiply(new Rational(2, 3));
@@ -89,6 +99,7 @@ public void testMultiplyTwoPositiveRationalNumbers() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Multiply a negative rational number by a positive rational number")
     public void testMultiplyANegativeRationalNumberByAPositiveRationalNumber() {
         Rational expected = new Rational(-1, 3);
         Rational actual = new Rational(-1, 2).multiply(new Rational(2, 3));
@@ -97,6 +108,7 @@ public void testMultiplyANegativeRationalNumberByAPositiveRationalNumber() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Multiply two negative rational numbers")
     public void testMultiplyTwoNegativeRationalNumbers() {
         Rational expected = new Rational(1, 3);
         Rational actual = new Rational(-1, 2).multiply(new Rational(-2, 3));
@@ -105,6 +117,7 @@ public void testMultiplyTwoNegativeRationalNumbers() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Multiply a rational number by its reciprocal")
     public void testMultiplyARationalNumberByItsReciprocal() {
         Rational expected = new Rational(1, 1);
         Rational actual = new Rational(1, 2).multiply(new Rational(2, 1));
@@ -113,6 +126,7 @@ public void testMultiplyARationalNumberByItsReciprocal() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Multiply a rational number by 1")
     public void testMultiplyARationalNumberByOne() {
         Rational expected = new Rational(1, 2);
         Rational actual = new Rational(1, 2).multiply(new Rational(1, 1));
@@ -121,6 +135,7 @@ public void testMultiplyARationalNumberByOne() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Multiply a rational number by 0")
     public void testMultiplyARationalNumberByZero() {
         Rational expected = new Rational(0, 1);
         Rational actual = new Rational(1, 2).multiply(new Rational(0, 1));
@@ -129,6 +144,7 @@ public void testMultiplyARationalNumberByZero() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Divide two positive rational numbers")
     public void testDivideTwoPositiveRationalNumbers() {
         Rational expected = new Rational(3, 4);
         Rational actual = new Rational(1, 2).divide(new Rational(2, 3));
@@ -137,6 +153,7 @@ public void testDivideTwoPositiveRationalNumbers() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Divide a positive rational number by a negative rational number")
     public void testDivideAPositiveRationalNumberByANegativeRationalNumber() {
         Rational expected = new Rational(-3, 4);
         Rational actual = new Rational(1, 2).divide(new Rational(-2, 3));
@@ -145,6 +162,7 @@ public void testDivideAPositiveRationalNumberByANegativeRationalNumber() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Divide two negative rational numbers")
     public void testDivideTwoNegativeRationalNumbers() {
         Rational expected = new Rational(3, 4);
         Rational actual = new Rational(-1, 2).divide(new Rational(-2, 3));
@@ -153,6 +171,7 @@ public void testDivideTwoNegativeRationalNumbers() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Divide a rational number by 1")
     public void testDivideARationalNumberByOne() {
         Rational expected = new Rational(1, 2);
         Rational actual = new Rational(1, 2).divide(new Rational(1, 1));
@@ -161,6 +180,7 @@ public void testDivideARationalNumberByOne() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Absolute value of a positive rational number")
     public void testAbsoluteValueOfAPositiveRationalNumber() {
         Rational expected = new Rational(1, 2);
         Rational actual = new Rational(1, 2).abs();
@@ -169,6 +189,7 @@ public void testAbsoluteValueOfAPositiveRationalNumber() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Absolute value of a positive rational number with negative numerator and denominator")
     public void testAbsoluteValueOfAPositiveRationalNumberWithNegativeNumeratorAndDenominator() {
         Rational expected = new Rational(1, 2);
         Rational actual = new Rational(-1, -2).abs();
@@ -177,6 +198,7 @@ public void testAbsoluteValueOfAPositiveRationalNumberWithNegativeNumeratorAndDe
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Absolute value of a negative rational number")
     public void testAbsoluteValueOfANegativeRationalNumber() {
         Rational expected = new Rational(1, 2);
         Rational actual = new Rational(-1, 2).abs();
@@ -185,6 +207,7 @@ public void testAbsoluteValueOfANegativeRationalNumber() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("\"Absolute value of a negative rational number with negative denominator")
     public void testAbsoluteValueOfANegativeRationalNumberWithNegativeDenominator() {
         Rational expected = new Rational(1, 2);
         Rational actual = new Rational(1, -2).abs();
@@ -193,6 +216,7 @@ public void testAbsoluteValueOfANegativeRationalNumberWithNegativeDenominator()
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Absolute value of zero")
     public void testAbsoluteValueOfZero() {
         Rational expected = new Rational(0, 1);
         Rational actual = new Rational(0, 1).abs();
@@ -201,6 +225,7 @@ public void testAbsoluteValueOfZero() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Absolute value of a rational number is reduced to lowest terms")
     public void testAbsoluteValueOfARationalNumberIsReducedToLowestTerms() {
         Rational expected = new Rational(1, 2);
         Rational actual = new Rational(2, 4).abs();
@@ -209,6 +234,7 @@ public void testAbsoluteValueOfARationalNumberIsReducedToLowestTerms() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Raise a positive rational number to a positive integer power")
     public void testRaiseAPositiveRationalNumberToAPositiveIntegerPower() {
         Rational expected = new Rational(1, 8);
         Rational actual = new Rational(1, 2).pow(3);
@@ -217,6 +243,7 @@ public void testRaiseAPositiveRationalNumberToAPositiveIntegerPower() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Raise a negative rational number to a positive integer power")
     public void testRaiseANegativeRationalNumberToAPositiveIntegerPower() {
         Rational expected = new Rational(-1, 8);
         Rational actual = new Rational(-1, 2).pow(3);
@@ -225,6 +252,7 @@ public void testRaiseANegativeRationalNumberToAPositiveIntegerPower() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Raise a positive rational number to a negative integer power")
     public void testRaiseAPositiveRationalNumberToANegativeIntegerPower() {
         Rational expected = new Rational(25, 9);
         Rational actual = new Rational(3, 5).pow(-2);
@@ -233,6 +261,7 @@ public void testRaiseAPositiveRationalNumberToANegativeIntegerPower() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("\"Raise a negative rational number to an even negative integer power")
     public void testRaiseANegativeRationalNumberToAnEvenNegativeIntegerPower() {
         Rational expected = new Rational(25, 9);
         Rational actual = new Rational(-3, 5).pow(-2);
@@ -241,6 +270,7 @@ public void testRaiseANegativeRationalNumberToAnEvenNegativeIntegerPower() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Raise a negative rational number to an odd negative integer power")
     public void testRaiseANegativeRationalNumberToAnOddNegativeIntegerPower() {
         Rational expected = new Rational(-125, 27);
         Rational actual = new Rational(-3, 5).pow(-3);
@@ -249,6 +279,7 @@ public void testRaiseANegativeRationalNumberToAnOddNegativeIntegerPower() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Raise zero to an integer power")
     public void testRaiseZeroToAnIntegerPower() {
         Rational expected = new Rational(0, 1);
         Rational actual = new Rational(0, 1).pow(5);
@@ -257,6 +288,7 @@ public void testRaiseZeroToAnIntegerPower() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Raise one to an integer power")
     public void testRaiseOneToAnIntegerPower() {
         Rational expected = new Rational(1, 1);
         Rational actual = new Rational(1, 1).pow(4);
@@ -265,6 +297,7 @@ public void testRaiseOneToAnIntegerPower() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Raise a positive rational number to the power of zero")
     public void testRaiseAPositiveRationalNumberToThePowerOfZero() {
         Rational expected = new Rational(1, 1);
         Rational actual = new Rational(-1, 2).pow(0);
@@ -273,6 +306,7 @@ public void testRaiseAPositiveRationalNumberToThePowerOfZero() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Raise a real number to a positive rational number")
     public void testRaiseARealNumberToAPositiveRationalNumber() {
         double expected = 16.0;
         double actual = new Rational(4, 3).exp(8.0);
@@ -281,6 +315,7 @@ public void testRaiseARealNumberToAPositiveRationalNumber() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Raise a real number to a negative rational number")
     public void testRaiseARealNumberToANegativeRationalNumber() {
         double expected = 1.0 / 3;
         double actual = new Rational(-1, 2).exp(9);
@@ -289,6 +324,7 @@ public void testRaiseARealNumberToANegativeRationalNumber() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Reduce a positive rational number to lowest terms")
     public void testReduceAPositiveRationalNumberToLowestTerms() {
         Rational expected = new Rational(1, 2);
         Rational actual = new Rational(2, 4);
@@ -297,6 +333,7 @@ public void testReduceAPositiveRationalNumberToLowestTerms() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Reduce places the minus sign on the numerator")
     public void testReducePlacesTheMinusSignOnTheNumerator() {
         Rational expected = new Rational(-3, 4);
         Rational actual = new Rational(3, -4);
@@ -305,6 +342,7 @@ public void testReducePlacesTheMinusSignOnTheNumerator() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Reduce a negative rational number to lowest terms")
     public void testReduceANegativeRationalNumberToLowestTerms() {
         Rational expected = new Rational(-2, 3);
         Rational actual = new Rational(-4, 6);
@@ -313,6 +351,7 @@ public void testReduceANegativeRationalNumberToLowestTerms() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Reduce a rational number with a negative denominator to lowest terms")
     public void testReduceARationalNumberWithANegativeDenominatorToLowestTerms() {
         Rational expected = new Rational(-1, 3);
         Rational actual = new Rational(3, -9);
@@ -321,6 +360,7 @@ public void testReduceARationalNumberWithANegativeDenominatorToLowestTerms() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Reduce zero to lowest terms")
     public void testReduceZeroToLowestTerms() {
         Rational expected = new Rational(0, 1);
         Rational actual = new Rational(0, 6);
@@ -329,6 +369,7 @@ public void testReduceZeroToLowestTerms() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Reduce an integer to lowest terms")
     public void testReduceAnIntegerToLowestTerms() {
         Rational expected = new Rational(-2, 1);
         Rational actual = new Rational(-14, 7);
@@ -337,6 +378,7 @@ public void testReduceAnIntegerToLowestTerms() {
 
     @Disabled("Remove to run test")
     @Test
+    @DisplayName("Reduce one to lowest terms")
     public void testReduceOneToLowestTerms() {
         Rational expected = new Rational(1, 1);
         Rational actual = new Rational(13, 13);