etl: Implement tests (#697)

* update starter file

* implement tests

* update config

* rename test functions, make test descriptions identical to the ones from .toml

[no important files changed]

Author: tasxatzial

exercises/practice/etl/.meta/config.json

@@ -14,7 +14,8 @@
     "mathias",
     "rsslldnphy",
     "sjwarner-bp",
-    "yurrriq"
+    "yurrriq",
+    "tasxatzial"
   ],
   "files": {
     "solution": [

exercises/practice/etl/src/etl.clj

@@ -1,5 +1,6 @@
 (ns etl)
 
-(defn transform [source] ;; <- arglist goes here
-  ;; your code goes here
-)
+(defn transform
+  [source]
+  ;; function body
+  )

exercises/practice/etl/test/etl_test.clj

@@ -1,30 +1,34 @@
 (ns etl-test
-  (:require [clojure.test :refer [deftest is]]
+  (:require [clojure.test :refer [deftest testing is]]
             etl))
 
-(deftest transform-one-value
-  (is (= {"world" 1}
-         (etl/transform {1 ["WORLD"]}))))
+(deftest transform_test_1
+  (testing "single letter"
+    (is (= {"a" 1}
+           (etl/transform {1 ["A"]})))))
 
-(deftest transform-more-values
-  (is (= {"world" 1 "gschoolers" 1}
-         (etl/transform {1 ["WORLD" "GSCHOOLERS"]}))))
+(deftest transform_test_2
+  (testing "single score with multiple letters"
+    (is (= {"a" 1 "e" 1 "i" 1 "o" 1 "u" 1}
+           (etl/transform {1 ["A" "E" "I" "O" "U"]})))))
 
-(deftest more-keys
-  (is (= {"apple" 1 "artichoke" 1 "boat" 2 "ballerina" 2}
-         (etl/transform {1 ["APPLE" "ARTICHOKE"], 2 ["BOAT" "BALLERINA"]}))))
+(deftest transform_test_3
+  (testing "multiple scores with multiple letters"
+    (is (= {"a" 1 "d" 2 "e" 1  "g" 2}
+           (etl/transform {1 ["A" "E"], 2 ["D" "G"]})))))
 
-(deftest full-dataset
-  (is (= {"a"  1 "b"  3 "c" 3 "d" 2 "e" 1
-          "f"  4 "g"  2 "h" 4 "i" 1 "j" 8
-          "k"  5 "l"  1 "m" 3 "n" 1 "o" 1
-          "p"  3 "q" 10 "r" 1 "s" 1 "t" 1
-          "u"  1 "v"  4 "w" 4 "x" 8 "y" 4
-          "z" 10}
-         (etl/transform {1  (re-seq #"\w" "AEIOULNRST")
-                         2  (re-seq #"\w" "DG")
-                         3  (re-seq #"\w" "BCMP")
-                         4  (re-seq #"\w" "FHVWY")
-                         5  (re-seq #"\w" "K")
-                         8  (re-seq #"\w" "JX")
-                         10 (re-seq #"\w" "QZ")}))))
+(deftest transform_test_4
+  (testing "multiple scores with differing numbers of letters"
+    (is (= {"a"  1 "b"  3 "c" 3 "d" 2 "e" 1
+            "f"  4 "g"  2 "h" 4 "i" 1 "j" 8
+            "k"  5 "l"  1 "m" 3 "n" 1 "o" 1
+            "p"  3 "q" 10 "r" 1 "s" 1 "t" 1
+            "u"  1 "v"  4 "w" 4 "x" 8 "y" 4
+            "z" 10}
+           (etl/transform {1  ["A" "E" "I" "O" "U" "L" "N" "R" "S" "T"]
+                           2  ["D" "G"]
+                           3  ["B" "C" "M" "P"]
+                           4  ["F" "H" "V" "W" "Y"]
+                           5  ["K"]
+                           8  ["J" "X"]
+                           10 ["Q" "Z"]})))))