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package datastructure
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestSet(t *testing.T) {
t.Parallel()
t.Run("new set is empty", func(t *testing.T) {
s := NewSet[bool]()
requireSet(t, s, []bool{})
})
t.Run("set from slice contains values", func(t *testing.T) {
s := SetFromSlice([]int{1, 3, 5})
requireSet(t, s, []int{1, 3, 5})
})
t.Run("set from slice deduplicates values", func(t *testing.T) {
s := SetFromSlice([]int{1, 1, 3, 5, 5})
requireSet(t, s, []int{1, 3, 5})
})
t.Run("set from values contains values", func(t *testing.T) {
s := SetFromValues(1, 3, 5)
requireSet(t, s, []int{1, 3, 5})
})
t.Run("set from values deduplicates values", func(t *testing.T) {
s := SetFromValues(1, 1, 3, 5, 5)
requireSet(t, s, []int{1, 3, 5})
})
t.Run("add value", func(t *testing.T) {
s := NewSet[bool]()
require.True(t, s.Add(true))
requireSet(t, s, []bool{true})
require.False(t, s.HasValue(false))
})
t.Run("remove value", func(t *testing.T) {
s := NewSet[bool]()
require.True(t, s.Add(true))
require.True(t, s.Remove(true))
requireSet(t, s, []bool{})
})
t.Run("adding multiple values", func(t *testing.T) {
s := NewSet[int]()
for i := 0; i < 5; i++ {
require.True(t, s.Add(i))
}
requireSet(t, s, []int{0, 1, 2, 3, 4})
})
t.Run("adding and removing multiple values", func(t *testing.T) {
s := NewSet[int]()
for i := 0; i < 10; i++ {
require.True(t, s.Add(i))
}
for i := 0; i < 5; i++ {
require.True(t, s.Remove(i*2))
}
requireSet(t, s, []int{1, 3, 5, 7, 9})
})
t.Run("re-adding values", func(t *testing.T) {
s := NewSet[int]()
require.True(t, s.Add(1))
require.False(t, s.Add(1))
requireSet(t, s, []int{1})
})
t.Run("removing nonexistent value", func(t *testing.T) {
s := NewSet[int]()
require.True(t, s.Add(1))
require.False(t, s.Remove(0))
requireSet(t, s, []int{1})
})
}
func TestSet_empty(t *testing.T) {
t.Parallel()
for _, tc := range []struct {
desc string
a, b *Set[int]
expectEqual bool
}{
{
desc: "empty sets",
a: NewSet[int](),
b: NewSet[int](),
expectEqual: true,
},
{
desc: "empty and non-empty set",
a: NewSet[int](),
b: SetFromValues(1),
expectEqual: false,
},
{
desc: "disjunct sets",
a: SetFromValues(2),
b: SetFromValues(1),
expectEqual: false,
},
{
desc: "partially disjunct sets",
a: SetFromValues(1, 2),
b: SetFromValues(1, 3),
expectEqual: false,
},
{
desc: "subset",
a: SetFromValues(1),
b: SetFromValues(1, 3),
expectEqual: false,
},
{
desc: "superset",
a: SetFromValues(1, 3),
b: SetFromValues(1),
expectEqual: false,
},
{
desc: "same values",
a: SetFromValues(1, 2, 3),
b: SetFromValues(1, 2, 3),
expectEqual: true,
},
} {
t.Run(tc.desc, func(t *testing.T) {
require.Equal(t, tc.expectEqual, tc.a.Equal(tc.b))
})
}
}
func requireSet[Value comparable](t *testing.T, s *Set[Value], expectedValues []Value) {
t.Helper()
require.Equal(t, len(expectedValues), s.Len())
require.ElementsMatch(t, expectedValues, s.Values())
require.Equal(t, len(expectedValues) == 0, s.IsEmpty())
require.True(t, s.Equal(SetFromSlice(expectedValues)))
}
|
