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canonical-data.json
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canonical-data.json
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{
"exercise": "custom-set",
"version": "1.1.0",
"comments": [
"These tests cover the core components of a set data structure: checking",
"presence, adding, comparing and basic set operations. Other features",
"such as deleting elements, checking size, sorting are not tested, but",
"you can add them if they are interesting in your language",
"",
"Tests about mixed-type sets are not included because the ability",
"to implement that will vary by language. If your language supports it",
"and you want to implement mixed-type sets, feel free."
],
"cases": [
{
"description": "Returns true if the set contains no elements",
"cases": [
{
"description": "sets with no elements are empty",
"property": "empty",
"set": [],
"expected": true
},
{
"description": "sets with elements are not empty",
"property": "empty",
"set": [1],
"expected": false
}
]
},
{
"description": "Sets can report if they contain an element",
"cases": [
{
"description": "nothing is contained in an empty set",
"property": "contains",
"set": [],
"element": 1,
"expected": false
},
{
"description": "when the element is in the set",
"property": "contains",
"set": [1, 2, 3],
"element": 1,
"expected": true
},
{
"description": "when the element is not in the set",
"property": "contains",
"set": [1, 2, 3],
"element": 4,
"expected": false
}
]
},
{
"description": "A set is a subset if all of its elements are contained in the other set",
"cases": [
{
"description": "empty set is a subset of another empty set",
"property": "subset",
"set1": [],
"set2": [],
"expected": true
},
{
"description": "empty set is a subset of non-empty set",
"property": "subset",
"set1": [],
"set2": [1],
"expected": true
},
{
"description": "non-empty set is not a subset of empty set",
"property": "subset",
"set1": [1],
"set2": [],
"expected": false
},
{
"description": "set is a subset of set with exact same elements",
"property": "subset",
"set1": [1, 2, 3],
"set2": [1, 2, 3],
"expected": true
},
{
"description": "set is a subset of larger set with same elements",
"property": "subset",
"set1": [1, 2, 3],
"set2": [4, 1, 2, 3],
"expected": true
},
{
"description": "set is not a subset of set that does not contain its elements",
"property": "subset",
"set1": [1, 2, 3],
"set2": [4, 1, 3],
"expected": false
}
]
},
{
"description": "Sets are disjoint if they share no elements",
"cases": [
{
"description": "the empty set is disjoint with itself",
"property": "disjoint",
"set1": [],
"set2": [],
"expected": true
},
{
"description": "empty set is disjoint with non-empty set",
"property": "disjoint",
"set1": [],
"set2": [1],
"expected": true
},
{
"description": "non-empty set is disjoint with empty set",
"property": "disjoint",
"set1": [1],
"set2": [],
"expected": true
},
{
"description": "sets are not disjoint if they share an element",
"property": "disjoint",
"set1": [1, 2],
"set2": [2, 3],
"expected": false
},
{
"description": "sets are disjoint if they share no elements",
"property": "disjoint",
"set1": [1, 2],
"set2": [3, 4],
"expected": true
}
]
},
{
"description": "Sets with the same elements are equal",
"cases": [
{
"description": "empty sets are equal",
"property": "equal",
"set1": [],
"set2": [],
"expected": true
},
{
"description": "empty set is not equal to non-empty set",
"property": "equal",
"set1": [],
"set2": [1, 2, 3],
"expected": false
},
{
"description": "non-empty set is not equal to empty set",
"property": "equal",
"set1": [1, 2, 3],
"set2": [],
"expected": false
},
{
"description": "sets with the same elements are equal",
"property": "equal",
"set1": [1, 2],
"set2": [2, 1],
"expected": true
},
{
"description": "sets with different elements are not equal",
"property": "equal",
"set1": [1, 2, 3],
"set2": [1, 2, 4],
"expected": false
},
{
"description": "set is not equal to larger set with same elements",
"property": "equal",
"set1": [1, 2, 3],
"set2": [1, 2, 3, 4],
"expected": false
}
]
},
{
"description": "Unique elements can be added to a set",
"cases": [
{
"description": "add to empty set",
"property": "add",
"set": [],
"element": 3,
"expected": [3]
},
{
"description": "add to non-empty set",
"property": "add",
"set": [1, 2, 4],
"element": 3,
"expected": [1, 2, 3, 4]
},
{
"description": "adding an existing element does not change the set",
"property": "add",
"set": [1, 2, 3],
"element": 3,
"expected": [1, 2, 3]
}
]
},
{
"description": "Intersection returns a set of all shared elements",
"cases": [
{
"description": "intersection of two empty sets is an empty set",
"property": "intersection",
"set1": [],
"set2": [],
"expected": []
},
{
"description": "intersection of an empty set and non-empty set is an empty set",
"property": "intersection",
"set1": [],
"set2": [3, 2, 5],
"expected": []
},
{
"description": "intersection of a non-empty set and an empty set is an empty set",
"property": "intersection",
"set1": [1, 2, 3, 4],
"set2": [],
"expected": []
},
{
"description": "intersection of two sets with no shared elements is an empty set",
"property": "intersection",
"set1": [1, 2, 3],
"set2": [4, 5, 6],
"expected": []
},
{
"description": "intersection of two sets with shared elements is a set of the shared elements",
"property": "intersection",
"set1": [1, 2, 3, 4],
"set2": [3, 2, 5],
"expected": [2, 3]
}
]
},
{
"description": "Difference (or Complement) of a set is a set of all elements that are only in the first set",
"cases": [
{
"description": "difference of two empty sets is an empty set",
"property": "difference",
"set1": [],
"set2": [],
"expected": []
},
{
"description": "difference of empty set and non-empty set is an empty set",
"property": "difference",
"set1": [],
"set2": [3, 2, 5],
"expected": []
},
{
"description": "difference of a non-empty set and an empty set is the non-empty set",
"property": "difference",
"set1": [1, 2, 3, 4],
"set2": [],
"expected": [1, 2, 3, 4]
},
{
"description": "difference of two non-empty sets is a set of elements that are only in the first set",
"property": "difference",
"set1": [3, 2, 1],
"set2": [2, 4],
"expected": [1, 3]
}
]
},
{
"description": "Union returns a set of all elements in either set",
"cases": [
{
"description": "union of empty sets is an empty set",
"property": "union",
"set1": [],
"set2": [],
"expected": []
},
{
"description": "union of an empty set and non-empty set is the non-empty set",
"property": "union",
"set1": [],
"set2": [2],
"expected": [2]
},
{
"description": "union of a non-empty set and empty set is the non-empty set",
"property": "union",
"set1": [1, 3],
"set2": [],
"expected": [1, 3]
},
{
"description": "union of non-empty sets contains all unique elements",
"property": "union",
"set1": [1, 3],
"set2": [2, 3],
"expected": [3, 2, 1]
}
]
}
]
}