dict: create a type

dictionary/dictionary.go

@@ -1,7 +1,9 @@
 package dictionary
 
-func Search(dictionary map[string]string, word string) string {
-	result, ok := dictionary[word]
+type Dictionary map[string]string
+
+func (d Dictionary) Search(word string) string {
+	result, ok := d[word]
 	if !ok {
 		return ""
 	}

dictionary/dictionary_test.go

@@ -11,9 +11,9 @@ func assertStrings(t testing.TB, got, want string) {
 }
 
 func TestSearch(t *testing.T) {
-	dictionary := map[string]string{"test": "this is just a test"}
+	dictionary := Dictionary{"test": "this is just a test"}
 
-	got := Search(dictionary, "test")
+	got := dictionary.Search("test")
 	want := "this is just a test"
 
     assertStrings(t, got, want)