Sync custom-set tests (#245)

Author: keiravillekode

exercises/practice/custom-set/.meta/tests.toml

@@ -75,6 +75,9 @@ description = "Sets with the same elements are equal -> sets with different elem
 [06059caf-9bf4-425e-aaff-88966cb3ea14]
 description = "Sets with the same elements are equal -> set is not equal to larger set with same elements"
 
+[d4a1142f-09aa-4df9-8b83-4437dcf7ec24]
+description = "Sets with the same elements are equal -> set is equal to a set constructed from an array with duplicates"
+
 [8a677c3c-a658-4d39-bb88-5b5b1a9659f4]
 description = "Unique elements can be added to a set -> add to empty set"
 
@@ -111,6 +114,9 @@ description = "Difference (or Complement) of a set is a set of all elements that
 [c5ac673e-d707-4db5-8d69-7082c3a5437e]
 description = "Difference (or Complement) of a set is a set of all elements that are only in the first set -> difference of two non-empty sets is a set of elements that are only in the first set"
 
+[20d0a38f-7bb7-4c4a-ac15-90c7392ecf2b]
+description = "Difference (or Complement) of a set is a set of all elements that are only in the first set -> difference removes all duplicates in the first set"
+
 [c45aed16-5494-455a-9033-5d4c93589dc6]
 description = "Union returns a set of all elements in either set -> union of empty sets is an empty set"
 

exercises/practice/custom-set/run_test.v

@@ -134,6 +134,13 @@ fn test_set_is_not_equal_to_larger_set_with_same_elements() {
 	assert !a_set.equal(b_set)
 }
 
+fn test_set_is_equal_to_a_set_constructed_from_an_array_with_duplicates() {
+	a_set := CustomSet.new([1])
+	b_set := CustomSet.new([1, 1])
+
+	assert a_set.equal(b_set)
+}
+
 // add
 
 fn test_add_to_empty_set() {
@@ -228,6 +235,14 @@ fn test_difference_of_two_non_empty_sets_is_a_set_of_elements_that_are_only_in_t
 	assert a_set.difference(b_set).equal(expected)
 }
 
+fn test_difference_removes_all_duplicates_in_the_first_set() {
+	a_set := CustomSet.new([1, 1])
+	b_set := CustomSet.new([1])
+	expected := CustomSet.new([]int{})
+
+	assert a_set.difference(b_set).equal(expected)
+}
+
 // @union
 
 fn test_union_of_empty_sets_is_an_empty_set() {