Sync tests for practice exercise rational numbers

exercises/practice/rational-numbers/.meta/src/reference/java/Rational.java

@@ -79,14 +79,19 @@ Rational divide(Rational that) {
     }
 
     Rational pow(int n) {
+        if (n < 0) {
+            return new Rational(pow(this.denominator, n), pow(this.numerator, n));    
+        }
         return new Rational(pow(this.numerator, n), pow(this.denominator, n));
     }
 
     double pow(double x) {
         return Math.pow(this.numerator, x) / Math.pow(this.denominator, x);
     }
 
-    private int pow(final int base, final int exponent) {
+    private int pow(final int base, int exponent) {
+        exponent = exponent < 0 ? exponent * -1 : exponent;
+
         int product = 1;
 
         for (int i = 0; i < exponent; i++) {

exercises/practice/rational-numbers/.meta/tests.toml

@@ -1,117 +1,139 @@
-# This is an auto-generated file. Regular comments will be removed when this
-# file is regenerated. Regenerating will not touch any manually added keys,
-# so comments can be added in a "comment" key.
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
 
 [0ba4d988-044c-4ed5-9215-4d0bb8d0ae9f]
-description = "Add two positive rational numbers"
+description = "Arithmetic -> Addition -> Add two positive rational numbers"
 
 [88ebc342-a2ac-4812-a656-7b664f718b6a]
-description = "Add a positive rational number and a negative rational number"
+description = "Arithmetic -> Addition -> Add a positive rational number and a negative rational number"
 
 [92ed09c2-991e-4082-a602-13557080205c]
-description = "Add two negative rational numbers"
+description = "Arithmetic -> Addition -> Add two negative rational numbers"
 
 [6e58999e-3350-45fb-a104-aac7f4a9dd11]
-description = "Add a rational number to its additive inverse"
+description = "Arithmetic -> Addition -> Add a rational number to its additive inverse"
 
 [47bba350-9db1-4ab9-b412-4a7e1f72a66e]
-description = "Subtract two positive rational numbers"
+description = "Arithmetic -> Subtraction -> Subtract two positive rational numbers"
 
 [93926e2a-3e82-4aee-98a7-fc33fb328e87]
-description = "Subtract a positive rational number and a negative rational number"
+description = "Arithmetic -> Subtraction -> Subtract a positive rational number and a negative rational number"
 
 [a965ba45-9b26-442b-bdc7-7728e4b8d4cc]
-description = "Subtract two negative rational numbers"
+description = "Arithmetic -> Subtraction -> Subtract two negative rational numbers"
 
 [0df0e003-f68e-4209-8c6e-6a4e76af5058]
-description = "Subtract a rational number from itself"
+description = "Arithmetic -> Subtraction -> Subtract a rational number from itself"
 
 [34fde77a-75f4-4204-8050-8d3a937958d3]
-description = "Multiply two positive rational numbers"
+description = "Arithmetic -> Multiplication -> Multiply two positive rational numbers"
 
 [6d015cf0-0ea3-41f1-93de-0b8e38e88bae]
-description = "Multiply a negative rational number by a positive rational number"
+description = "Arithmetic -> Multiplication -> Multiply a negative rational number by a positive rational number"
 
 [d1bf1b55-954e-41b1-8c92-9fc6beeb76fa]
-description = "Multiply two negative rational numbers"
+description = "Arithmetic -> Multiplication -> Multiply two negative rational numbers"
 
 [a9b8f529-9ec7-4c79-a517-19365d779040]
-description = "Multiply a rational number by its reciprocal"
+description = "Arithmetic -> Multiplication -> Multiply a rational number by its reciprocal"
 
 [d89d6429-22fa-4368-ab04-9e01a44d3b48]
-description = "Multiply a rational number by 1"
+description = "Arithmetic -> Multiplication -> Multiply a rational number by 1"
 
 [0d95c8b9-1482-4ed7-bac9-b8694fa90145]
-description = "Multiply a rational number by 0"
+description = "Arithmetic -> Multiplication -> Multiply a rational number by 0"
 
 [1de088f4-64be-4e6e-93fd-5997ae7c9798]
-description = "Divide two positive rational numbers"
+description = "Arithmetic -> Division -> Divide two positive rational numbers"
 
 [7d7983db-652a-4e66-981a-e921fb38d9a9]
-description = "Divide a positive rational number by a negative rational number"
+description = "Arithmetic -> Division -> Divide a positive rational number by a negative rational number"
 
 [1b434d1b-5b38-4cee-aaf5-b9495c399e34]
-description = "Divide two negative rational numbers"
+description = "Arithmetic -> Division -> Divide two negative rational numbers"
 
 [d81c2ebf-3612-45a6-b4e0-f0d47812bd59]
-description = "Divide a rational number by 1"
+description = "Arithmetic -> Division -> Divide a rational number by 1"
 
 [5fee0d8e-5955-4324-acbe-54cdca94ddaa]
-description = "Absolute value of a positive rational number"
+description = "Absolute value -> Absolute value of a positive rational number"
 
 [3cb570b6-c36a-4963-a380-c0834321bcaa]
-description = "Absolute value of a positive rational number with negative numerator and denominator"
+description = "Absolute value -> Absolute value of a positive rational number with negative numerator and denominator"
 
 [6a05f9a0-1f6b-470b-8ff7-41af81773f25]
-description = "Absolute value of a negative rational number"
+description = "Absolute value -> Absolute value of a negative rational number"
 
 [5d0f2336-3694-464f-8df9-f5852fda99dd]
-description = "Absolute value of a negative rational number with negative denominator"
+description = "Absolute value -> Absolute value of a negative rational number with negative denominator"
 
 [f8e1ed4b-9dca-47fb-a01e-5311457b3118]
-description = "Absolute value of zero"
+description = "Absolute value -> Absolute value of zero"
+
+[4a8c939f-f958-473b-9f88-6ad0f83bb4c4]
+description = "Absolute value -> Absolute value of a rational number is reduced to lowest terms"
 
 [ea2ad2af-3dab-41e7-bb9f-bd6819668a84]
-description = "Raise a positive rational number to a positive integer power"
+description = "Exponentiation of a rational number -> Raise a positive rational number to a positive integer power"
 
 [8168edd2-0af3-45b1-b03f-72c01332e10a]
-description = "Raise a negative rational number to a positive integer power"
+description = "Exponentiation of a rational number -> Raise a negative rational number to a positive integer power"
+
+[c291cfae-cfd8-44f5-aa6c-b175c148a492]
+description = "Exponentiation of a rational number -> Raise a positive rational number to a negative integer power"
+
+[45cb3288-4ae4-4465-9ae5-c129de4fac8e]
+description = "Exponentiation of a rational number -> Raise a negative rational number to an even negative integer power"
+
+[2d47f945-ffe1-4916-a399-c2e8c27d7f72]
+description = "Exponentiation of a rational number -> Raise a negative rational number to an odd negative integer power"
 
 [e2f25b1d-e4de-4102-abc3-c2bb7c4591e4]
-description = "Raise zero to an integer power"
+description = "Exponentiation of a rational number -> Raise zero to an integer power"
 
 [431cac50-ab8b-4d58-8e73-319d5404b762]
-description = "Raise one to an integer power"
+description = "Exponentiation of a rational number -> Raise one to an integer power"
 
 [7d164739-d68a-4a9c-b99f-dd77ce5d55e6]
-description = "Raise a positive rational number to the power of zero"
+description = "Exponentiation of a rational number -> Raise a positive rational number to the power of zero"
 
 [eb6bd5f5-f880-4bcd-8103-e736cb6e41d1]
-description = "Raise a negative rational number to the power of zero"
+description = "Exponentiation of a rational number -> Raise a negative rational number to the power of zero"
 
 [30b467dd-c158-46f5-9ffb-c106de2fd6fa]
-description = "Raise a real number to a positive rational number"
+description = "Exponentiation of a real number to a rational number -> Raise a real number to a positive rational number"
 
 [6e026bcc-be40-4b7b-ae22-eeaafc5a1789]
-description = "Raise a real number to a negative rational number"
+description = "Exponentiation of a real number to a rational number -> Raise a real number to a negative rational number"
 
 [9f866da7-e893-407f-8cd2-ee85d496eec5]
-description = "Raise a real number to a zero rational number"
+description = "Exponentiation of a real number to a rational number -> Raise a real number to a zero rational number"
 
 [0a63fbde-b59c-4c26-8237-1e0c73354d0a]
-description = "Reduce a positive rational number to lowest terms"
+description = "Reduction to lowest terms -> Reduce a positive rational number to lowest terms"
+
+[5ed6f248-ad8d-4d4e-a545-9146c6727f33]
+description = "Reduction to lowest terms -> Reduce places the minus sign on the numerator"
 
 [f87c2a4e-d29c-496e-a193-318c503e4402]
-description = "Reduce a negative rational number to lowest terms"
+description = "Reduction to lowest terms -> Reduce a negative rational number to lowest terms"
 
 [3b92ffc0-5b70-4a43-8885-8acee79cdaaf]
-description = "Reduce a rational number with a negative denominator to lowest terms"
+description = "Reduction to lowest terms -> Reduce a rational number with a negative denominator to lowest terms"
 
 [c9dbd2e6-5ac0-4a41-84c1-48b645b4f663]
-description = "Reduce zero to lowest terms"
+description = "Reduction to lowest terms -> Reduce zero to lowest terms"
 
 [297b45ad-2054-4874-84d4-0358dc1b8887]
-description = "Reduce an integer to lowest terms"
+description = "Reduction to lowest terms -> Reduce an integer to lowest terms"
 
 [a73a17fe-fe8c-4a1c-a63b-e7579e333d9e]
-description = "Reduce one to lowest terms"
+description = "Reduction to lowest terms -> Reduce one to lowest terms"

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

@@ -198,6 +198,14 @@ public void testAbsoluteValueOfZero() {
         Rational actual = new Rational(0, 1).abs();
         assertThat(actual).isEqualTo(expected);
     }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void testAbsoluteValueOfARationalNumberIsReducedToLowestTerms() {
+        Rational expected = new Rational(1, 2);
+        Rational actual = new Rational(2, 4).abs();
+        assertThat(actual).isEqualTo(expected);
+    }
 
     @Ignore("Remove to run test")
     @Test
@@ -214,6 +222,30 @@ public void testRaiseANegativeRationalNumberToAPositiveIntegerPower() {
         Rational actual = new Rational(-1, 2).pow(3);
         assertThat(actual).isEqualTo(expected);
     }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void testRaiseAPositiveRationalNumberToANegativeIntegerPower() {
+        Rational expected = new Rational(25, 9);
+        Rational actual = new Rational(3, 5).pow(-2);
+        assertThat(actual).isEqualTo(expected);
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void testRaiseANegativeRationalNumberToAnEvenNegativeIntegerPower() {
+        Rational expected = new Rational(25, 9);
+        Rational actual = new Rational(-3, 5).pow(-2);
+        assertThat(actual).isEqualTo(expected);
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void testRaiseANegativeRationalNumberToAnOddNegativeIntegerPower() {
+        Rational expected = new Rational(-125, 27);
+        Rational actual = new Rational(-3, 5).pow(-3);
+        assertThat(actual).isEqualTo(expected);
+    }
 
     @Ignore("Remove to run test")
     @Test
@@ -262,6 +294,14 @@ public void testReduceAPositiveRationalNumberToLowestTerms() {
         Rational actual = new Rational(2, 4);
         assertThat(actual).isEqualTo(expected);
     }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void testReducePlacesTheMinusSignOnTheNumerator() {
+        Rational expected = new Rational(-3, 4);
+        Rational actual = new Rational(3, -4);
+        assertThat(actual).isEqualTo(expected);
+    }
 
     @Ignore("Remove to run test")
     @Test