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idlist_test.go
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idlist_test.go
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package tormenta
import (
"fmt"
"testing"
"time"
"github.com/jpincas/gouuidv6"
)
var (
id1 = idFromInt(1)
id2 = idFromInt(2)
id3 = idFromInt(3)
id4 = idFromInt(4)
id5 = idFromInt(5)
id6 = idFromInt(6)
id7 = idFromInt(7)
id8 = idFromInt(8)
id9 = idFromInt(9)
)
func Test_Sort(t *testing.T) {
testCases := []struct {
testName string
unsorted idList
expected idList
reverse bool
}{
{
"empty list",
idList{},
idList{},
true,
},
{
"single member",
idList{id1},
idList{id1},
true,
},
{
"multiple members - preserve order",
idList{id5, id4, id3, id2, id1},
idList{id5, id4, id3, id2, id1},
true,
},
{
"multiple members - change order",
idList{id1, id2, id3, id4, id5},
idList{id5, id4, id3, id2, id1},
true,
},
{
"multiple members - change order - oldest first",
idList{id5, id4, id3, id2, id1},
idList{id1, id2, id3, id4, id5},
false,
},
{
"multiple members - preserve order - oldest first",
idList{id1, id2, id3, id4, id5},
idList{id1, id2, id3, id4, id5},
false,
},
}
for _, testCase := range testCases {
testCase.unsorted.sort(testCase.reverse)
if err := compareIDLists(testCase.unsorted, testCase.expected); err != nil {
t.Errorf("Testing: %s. Got error: %v", testCase.testName, err)
}
}
}
func Test_Union(t *testing.T) {
testCases := []struct {
testName string
idLists []idList
expected idList
}{
{
"empty list",
[]idList{},
idList{},
},
{
"1 list (empty)",
[]idList{idList{}},
idList{},
},
{
"2 lists (both empty)",
[]idList{idList{}, idList{}},
idList{},
},
{
"1 list (1 member)",
[]idList{
idList{id1},
},
idList{id1},
},
{
"1 list (multiple members, sort not required)",
[]idList{
idList{id3, id2, id1},
},
idList{id3, id2, id1},
},
{
"1 list (multiple members, sort required)",
[]idList{
idList{id1, id2, id3},
},
idList{id3, id2, id1},
},
{
"2 lists (multiple members, no overlap)",
[]idList{
idList{id3, id2, id1},
idList{id6, id5, id4},
},
idList{id6, id5, id4, id3, id2, id1},
},
{
"2 lists (multiple members, overlap)",
[]idList{
idList{id3, id2, id1},
idList{id5, id4, id3},
},
idList{id5, id4, id3, id2, id1},
},
{
"3 lists (multiple members, overlap, repeats)",
[]idList{
idList{id3, id2, id1},
idList{id5, id4, id3},
idList{id5, id5, id1},
},
idList{id5, id4, id3, id2, id1},
},
}
for _, testCase := range testCases {
result := union(testCase.idLists...)
// The expected results implicate a reverse sort of the results -
// that's just how I wrote them originally
result.sort(true)
if err := compareIDLists(result, testCase.expected); err != nil {
t.Errorf("Testing: %s. Got error: %v", testCase.testName, err)
}
}
}
func Test_Intersection(t *testing.T) {
testCases := []struct {
testName string
idLists []idList
expected idList
}{
{
"empty list",
[]idList{},
idList{},
},
{
"1 list (empty)",
[]idList{idList{}},
idList{},
},
{
"2 lists (both empty)",
[]idList{idList{}, idList{}},
idList{},
},
{
"1 list (1 member)",
[]idList{
idList{id1},
},
idList{id1},
},
{
"1 list (multiple members, sort not required)",
[]idList{
idList{id3, id2, id1},
},
idList{id3, id2, id1},
},
{
"1 list (multiple members, sort required)",
[]idList{
idList{id1, id2, id3},
},
idList{id3, id2, id1},
},
{
"2 lists (multiple members, no overlap)",
[]idList{
idList{id3, id2, id1},
idList{id6, id5, id4},
},
idList{},
},
{
"2 lists (multiple members, overlap)",
[]idList{
idList{id3, id2, id1},
idList{id5, id4, id3},
},
idList{id3},
},
{
"3 lists (multiple members, overlap, repeats)",
[]idList{
idList{id3, id5, id3},
idList{id5, id4, id3},
idList{id5, id5, id3},
},
idList{id5, id3},
},
{
"complete example",
[]idList{
idList{id1, id2, id3, id4, id5, id6, id7, id8, id9},
idList{id5, id4, id3},
idList{id3, id4, id5, id3, id4},
idList{id3, id4, id5, id2, id1},
idList{id5, id4, id3, id7, id8},
},
idList{id5, id4, id3},
},
}
for _, testCase := range testCases {
result := intersection(testCase.idLists...)
// The expected results implicate a reverse sort of the results -
// that's just how I wrote them originally
result.sort(true)
if err := compareIDLists(result, testCase.expected); err != nil {
t.Errorf("Testing: %s. Got error: %v", testCase.testName, err)
}
}
}
func idFromInt(i int64) gouuidv6.UUID {
return gouuidv6.NewFromTime(time.Unix(i, 0))
}
func compareIDLists(listA, listB idList) error {
if len(listA) != len(listB) {
return fmt.Errorf("Length of lists does not match. Got %v; wanted %v", len(listA), len(listB))
}
for i := range listA {
if listA[i] != listB[i] {
return fmt.Errorf("Comparing list members, mismatch at index %v. List A: %v; List B: %v", i, listA[i], listB[i])
}
}
return nil
}