difference-of-squares: add generator and regenerate tests

exercises/practice/difference-of-squares/.meta/example.clj

@@ -1,12 +1,13 @@
 (ns difference-of-squares)
 
+(defn- square [n] (* n n))
 (defn- sum [xs] (reduce + xs))
 
 (defn sum-of-squares [n]
-  (sum (map #(int (Math/pow % 2)) (range 0 (inc n)))))
+  (sum (map square (range 1 (inc n)))))
 
 (defn square-of-sum [n]
-  (int (Math/pow (sum (range 0 (inc n))) 2)))
+  (square (sum (range 1 (inc n)))))
 
 (defn difference [x]
   (- (square-of-sum x) (sum-of-squares x)))

exercises/practice/difference-of-squares/.meta/generator.clj

@@ -0,0 +1,7 @@
+(ns difference-of-squares-generator)
+
+(defn- update-path [path]
+  (take-last 1 path))
+
+(defn transform [test-cases]
+  (map #(update % :path update-path) test-cases))

exercises/practice/difference-of-squares/.meta/generator.tpl

@@ -0,0 +1,18 @@
+(ns difference-of-squares-test
+  (:require [clojure.test :refer [deftest testing is]]
+            difference-of-squares))
+{{#test_cases.squareOfSum}}
+(deftest square-of-sum_test_{{idx}}
+  (testing "{{description}}"
+    (is (= {{expected}} (difference-of-squares/square-of-sum {{input.number}})))))
+{{/test_cases.squareOfSum~}}
+{{#test_cases.sumOfSquares}}
+(deftest sum-of-squares_test_{{idx}}
+  (testing "{{description}}"
+    (is (= {{expected}} (difference-of-squares/sum-of-squares {{input.number}})))))
+{{/test_cases.sumOfSquares~}}
+{{#test_cases.differenceOfSquares}}
+(deftest difference_test_{{idx}}
+  (testing "{{description}}"
+    (is (= {{expected}} (difference-of-squares/difference {{input.number}})))))
+{{/test_cases.differenceOfSquares~}}

exercises/practice/difference-of-squares/test/difference_of_squares_test.clj

@@ -3,37 +3,37 @@
             difference-of-squares))
 
 (deftest square-of-sum_test_1
-  (testing "Square the sum of the numbers up to the given number -> square of sum 1"
+  (testing "square of sum 1"
     (is (= 1 (difference-of-squares/square-of-sum 1)))))
 
 (deftest square-of-sum_test_2
-  (testing "Square the sum of the numbers up to the given number -> square of sum 5"
+  (testing "square of sum 5"
     (is (= 225 (difference-of-squares/square-of-sum 5)))))
 
 (deftest square-of-sum_test_3
-  (testing "Square the sum of the numbers up to the given number -> square of sum 100"
+  (testing "square of sum 100"
     (is (= 25502500 (difference-of-squares/square-of-sum 100)))))
 
 (deftest sum-of-squares_test_1
-  (testing "Sum the squares of the numbers up to the given number -> sum of squares 1"
+  (testing "sum of squares 1"
     (is (= 1 (difference-of-squares/sum-of-squares 1)))))
 
 (deftest sum-of-squares_test_2
-  (testing "Sum the squares of the numbers up to the given number -> sum of squares 5"
+  (testing "sum of squares 5"
     (is (= 55 (difference-of-squares/sum-of-squares 5)))))
 
 (deftest sum-of-squares_test_3
-  (testing "Sum the squares of the numbers up to the given number -> sum of squares 100"
+  (testing "sum of squares 100"
     (is (= 338350 (difference-of-squares/sum-of-squares 100)))))
 
 (deftest difference_test_1
-  (testing "Subtract sum of squares from square of sums -> difference of squares 1"
+  (testing "difference of squares 1"
     (is (= 0 (difference-of-squares/difference 1)))))
 
 (deftest difference_test_2
-  (testing "Subtract sum of squares from square of sums -> difference of squares 5"
+  (testing "difference of squares 5"
     (is (= 170 (difference-of-squares/difference 5)))))
 
 (deftest difference_test_3
-  (testing "Subtract sum of squares from square of sums -> difference of squares 100"
+  (testing "difference of squares 100"
     (is (= 25164150 (difference-of-squares/difference 100)))))