terraform/internal/dag/set_test.go

159 lines
2.6 KiB
Go
Raw Normal View History

2017-02-02 19:03:20 +01:00
package dag
import (
"fmt"
"testing"
)
func TestSetDifference(t *testing.T) {
cases := []struct {
Name string
A, B []interface{}
Expected []interface{}
}{
{
"same",
[]interface{}{1, 2, 3},
[]interface{}{3, 1, 2},
[]interface{}{},
},
{
"A has extra elements",
[]interface{}{1, 2, 3},
[]interface{}{3, 2},
[]interface{}{1},
},
{
"B has extra elements",
[]interface{}{1, 2, 3},
[]interface{}{3, 2, 1, 4},
[]interface{}{},
},
{
"B is nil",
[]interface{}{1, 2, 3},
nil,
[]interface{}{1, 2, 3},
},
2017-02-02 19:03:20 +01:00
}
for i, tc := range cases {
t.Run(fmt.Sprintf("%d-%s", i, tc.Name), func(t *testing.T) {
one := make(Set)
two := make(Set)
expected := make(Set)
2017-02-02 19:03:20 +01:00
for _, v := range tc.A {
one.Add(v)
}
for _, v := range tc.B {
two.Add(v)
}
if tc.B == nil {
two = nil
}
2017-02-02 19:03:20 +01:00
for _, v := range tc.Expected {
expected.Add(v)
}
actual := one.Difference(two)
match := actual.Intersection(expected)
2017-02-02 19:03:20 +01:00
if match.Len() != expected.Len() {
t.Fatalf("bad: %#v", actual.List())
}
})
}
}
func TestSetFilter(t *testing.T) {
cases := []struct {
Input []interface{}
Expected []interface{}
}{
{
[]interface{}{1, 2, 3},
[]interface{}{1, 2, 3},
},
{
[]interface{}{4, 5, 6},
[]interface{}{4},
},
{
[]interface{}{7, 8, 9},
[]interface{}{},
},
}
for i, tc := range cases {
t.Run(fmt.Sprintf("%d-%#v", i, tc.Input), func(t *testing.T) {
input := make(Set)
expected := make(Set)
for _, v := range tc.Input {
input.Add(v)
}
for _, v := range tc.Expected {
expected.Add(v)
}
actual := input.Filter(func(v interface{}) bool {
return v.(int) < 5
})
match := actual.Intersection(expected)
if match.Len() != expected.Len() {
t.Fatalf("bad: %#v", actual.List())
}
})
}
}
func TestSetCopy(t *testing.T) {
a := make(Set)
a.Add(1)
a.Add(2)
b := a.Copy()
b.Add(3)
diff := b.Difference(a)
if diff.Len() != 1 {
t.Fatalf("expected single diff value, got %#v", diff)
}
if !diff.Include(3) {
t.Fatalf("diff does not contain 3, got %#v", diff)
}
}
func makeSet(n int) Set {
ret := make(Set, n)
for i := 0; i < n; i++ {
ret.Add(i)
}
return ret
}
func BenchmarkSetIntersection_100_100000(b *testing.B) {
small := makeSet(100)
large := makeSet(100000)
b.ResetTimer()
for n := 0; n < b.N; n++ {
small.Intersection(large)
}
}
func BenchmarkSetIntersection_100000_100(b *testing.B) {
small := makeSet(100)
large := makeSet(100000)
b.ResetTimer()
for n := 0; n < b.N; n++ {
large.Intersection(small)
}
}