mirror of
https://github.com/opentofu/opentofu.git
synced 2024-12-30 10:47:14 -06:00
05caff2ca3
This is part of a general effort to move all of Terraform's non-library package surface under internal in order to reinforce that these are for internal use within Terraform only. If you were previously importing packages under this prefix into an external codebase, you could pin to an earlier release tag as an interim solution until you've make a plan to achieve the same functionality some other way.
429 lines
8.0 KiB
Go
429 lines
8.0 KiB
Go
package dag
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"os"
|
|
"reflect"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"testing"
|
|
|
|
"github.com/hashicorp/terraform/internal/tfdiags"
|
|
|
|
_ "github.com/hashicorp/terraform/internal/logging"
|
|
)
|
|
|
|
func TestMain(m *testing.M) {
|
|
flag.Parse()
|
|
os.Exit(m.Run())
|
|
}
|
|
|
|
func TestAcyclicGraphRoot(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Connect(BasicEdge(3, 2))
|
|
g.Connect(BasicEdge(3, 1))
|
|
|
|
if root, err := g.Root(); err != nil {
|
|
t.Fatalf("err: %s", err)
|
|
} else if root != 3 {
|
|
t.Fatalf("bad: %#v", root)
|
|
}
|
|
}
|
|
|
|
func TestAcyclicGraphRoot_cycle(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Connect(BasicEdge(1, 2))
|
|
g.Connect(BasicEdge(2, 3))
|
|
g.Connect(BasicEdge(3, 1))
|
|
|
|
if _, err := g.Root(); err == nil {
|
|
t.Fatal("should error")
|
|
}
|
|
}
|
|
|
|
func TestAcyclicGraphRoot_multiple(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Connect(BasicEdge(3, 2))
|
|
|
|
if _, err := g.Root(); err == nil {
|
|
t.Fatal("should error")
|
|
}
|
|
}
|
|
|
|
func TestAyclicGraphTransReduction(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Connect(BasicEdge(1, 2))
|
|
g.Connect(BasicEdge(1, 3))
|
|
g.Connect(BasicEdge(2, 3))
|
|
g.TransitiveReduction()
|
|
|
|
actual := strings.TrimSpace(g.String())
|
|
expected := strings.TrimSpace(testGraphTransReductionStr)
|
|
if actual != expected {
|
|
t.Fatalf("bad: %s", actual)
|
|
}
|
|
}
|
|
|
|
func TestAyclicGraphTransReduction_more(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Add(4)
|
|
g.Connect(BasicEdge(1, 2))
|
|
g.Connect(BasicEdge(1, 3))
|
|
g.Connect(BasicEdge(1, 4))
|
|
g.Connect(BasicEdge(2, 3))
|
|
g.Connect(BasicEdge(2, 4))
|
|
g.Connect(BasicEdge(3, 4))
|
|
g.TransitiveReduction()
|
|
|
|
actual := strings.TrimSpace(g.String())
|
|
expected := strings.TrimSpace(testGraphTransReductionMoreStr)
|
|
if actual != expected {
|
|
t.Fatalf("bad: %s", actual)
|
|
}
|
|
}
|
|
|
|
// use this to simulate slow sort operations
|
|
type counter struct {
|
|
Name string
|
|
Calls int64
|
|
}
|
|
|
|
func (s *counter) String() string {
|
|
s.Calls++
|
|
return s.Name
|
|
}
|
|
|
|
// Make sure we can reduce a sizable, fully-connected graph.
|
|
func TestAyclicGraphTransReduction_fullyConnected(t *testing.T) {
|
|
var g AcyclicGraph
|
|
|
|
const nodeCount = 200
|
|
nodes := make([]*counter, nodeCount)
|
|
for i := 0; i < nodeCount; i++ {
|
|
nodes[i] = &counter{Name: strconv.Itoa(i)}
|
|
}
|
|
|
|
// Add them all to the graph
|
|
for _, n := range nodes {
|
|
g.Add(n)
|
|
}
|
|
|
|
// connect them all
|
|
for i := range nodes {
|
|
for j := range nodes {
|
|
if i == j {
|
|
continue
|
|
}
|
|
g.Connect(BasicEdge(nodes[i], nodes[j]))
|
|
}
|
|
}
|
|
|
|
g.TransitiveReduction()
|
|
|
|
vertexNameCalls := int64(0)
|
|
for _, n := range nodes {
|
|
vertexNameCalls += n.Calls
|
|
}
|
|
|
|
switch {
|
|
case vertexNameCalls > 2*nodeCount:
|
|
// Make calling it more the 2x per node fatal.
|
|
// If we were sorting this would give us roughly ln(n)(n^3) calls, or
|
|
// >59000000 calls for 200 vertices.
|
|
t.Fatalf("VertexName called %d times", vertexNameCalls)
|
|
case vertexNameCalls > 0:
|
|
// we don't expect any calls, but a change here isn't necessarily fatal
|
|
t.Logf("WARNING: VertexName called %d times", vertexNameCalls)
|
|
}
|
|
}
|
|
|
|
func TestAcyclicGraphValidate(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Connect(BasicEdge(3, 2))
|
|
g.Connect(BasicEdge(3, 1))
|
|
|
|
if err := g.Validate(); err != nil {
|
|
t.Fatalf("err: %s", err)
|
|
}
|
|
}
|
|
|
|
func TestAcyclicGraphValidate_cycle(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Connect(BasicEdge(3, 2))
|
|
g.Connect(BasicEdge(3, 1))
|
|
g.Connect(BasicEdge(1, 2))
|
|
g.Connect(BasicEdge(2, 1))
|
|
|
|
if err := g.Validate(); err == nil {
|
|
t.Fatal("should error")
|
|
}
|
|
}
|
|
|
|
func TestAcyclicGraphValidate_cycleSelf(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Connect(BasicEdge(1, 1))
|
|
|
|
if err := g.Validate(); err == nil {
|
|
t.Fatal("should error")
|
|
}
|
|
}
|
|
|
|
func TestAcyclicGraphAncestors(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Add(4)
|
|
g.Add(5)
|
|
g.Connect(BasicEdge(0, 1))
|
|
g.Connect(BasicEdge(1, 2))
|
|
g.Connect(BasicEdge(2, 3))
|
|
g.Connect(BasicEdge(3, 4))
|
|
g.Connect(BasicEdge(4, 5))
|
|
|
|
actual, err := g.Ancestors(2)
|
|
if err != nil {
|
|
t.Fatalf("err: %#v", err)
|
|
}
|
|
|
|
expected := []Vertex{3, 4, 5}
|
|
|
|
if actual.Len() != len(expected) {
|
|
t.Fatalf("bad length! expected %#v to have len %d", actual, len(expected))
|
|
}
|
|
|
|
for _, e := range expected {
|
|
if !actual.Include(e) {
|
|
t.Fatalf("expected: %#v to include: %#v", expected, actual)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestAcyclicGraphDescendents(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Add(4)
|
|
g.Add(5)
|
|
g.Connect(BasicEdge(0, 1))
|
|
g.Connect(BasicEdge(1, 2))
|
|
g.Connect(BasicEdge(2, 3))
|
|
g.Connect(BasicEdge(3, 4))
|
|
g.Connect(BasicEdge(4, 5))
|
|
|
|
actual, err := g.Descendents(2)
|
|
if err != nil {
|
|
t.Fatalf("err: %#v", err)
|
|
}
|
|
|
|
expected := []Vertex{0, 1}
|
|
|
|
if actual.Len() != len(expected) {
|
|
t.Fatalf("bad length! expected %#v to have len %d", actual, len(expected))
|
|
}
|
|
|
|
for _, e := range expected {
|
|
if !actual.Include(e) {
|
|
t.Fatalf("expected: %#v to include: %#v", expected, actual)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestAcyclicGraphWalk(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Connect(BasicEdge(3, 2))
|
|
g.Connect(BasicEdge(3, 1))
|
|
|
|
var visits []Vertex
|
|
var lock sync.Mutex
|
|
err := g.Walk(func(v Vertex) tfdiags.Diagnostics {
|
|
lock.Lock()
|
|
defer lock.Unlock()
|
|
visits = append(visits, v)
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
t.Fatalf("err: %s", err)
|
|
}
|
|
|
|
expected := [][]Vertex{
|
|
{1, 2, 3},
|
|
{2, 1, 3},
|
|
}
|
|
for _, e := range expected {
|
|
if reflect.DeepEqual(visits, e) {
|
|
return
|
|
}
|
|
}
|
|
|
|
t.Fatalf("bad: %#v", visits)
|
|
}
|
|
|
|
func TestAcyclicGraphWalk_error(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Add(4)
|
|
g.Connect(BasicEdge(4, 3))
|
|
g.Connect(BasicEdge(3, 2))
|
|
g.Connect(BasicEdge(2, 1))
|
|
|
|
var visits []Vertex
|
|
var lock sync.Mutex
|
|
err := g.Walk(func(v Vertex) tfdiags.Diagnostics {
|
|
lock.Lock()
|
|
defer lock.Unlock()
|
|
|
|
var diags tfdiags.Diagnostics
|
|
|
|
if v == 2 {
|
|
diags = diags.Append(fmt.Errorf("error"))
|
|
return diags
|
|
}
|
|
|
|
visits = append(visits, v)
|
|
return diags
|
|
})
|
|
if err == nil {
|
|
t.Fatal("should error")
|
|
}
|
|
|
|
expected := []Vertex{1}
|
|
if !reflect.DeepEqual(visits, expected) {
|
|
t.Errorf("wrong visits\ngot: %#v\nwant: %#v", visits, expected)
|
|
}
|
|
|
|
}
|
|
|
|
func BenchmarkDAG(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
count := 150
|
|
b.StopTimer()
|
|
g := &AcyclicGraph{}
|
|
|
|
// create 4 layers of fully connected nodes
|
|
// layer A
|
|
for i := 0; i < count; i++ {
|
|
g.Add(fmt.Sprintf("A%d", i))
|
|
}
|
|
|
|
// layer B
|
|
for i := 0; i < count; i++ {
|
|
B := fmt.Sprintf("B%d", i)
|
|
g.Add(B)
|
|
for j := 0; j < count; j++ {
|
|
g.Connect(BasicEdge(B, fmt.Sprintf("A%d", j)))
|
|
}
|
|
}
|
|
|
|
// layer C
|
|
for i := 0; i < count; i++ {
|
|
c := fmt.Sprintf("C%d", i)
|
|
g.Add(c)
|
|
for j := 0; j < count; j++ {
|
|
// connect them to previous layers so we have something that requires reduction
|
|
g.Connect(BasicEdge(c, fmt.Sprintf("A%d", j)))
|
|
g.Connect(BasicEdge(c, fmt.Sprintf("B%d", j)))
|
|
}
|
|
}
|
|
|
|
// layer D
|
|
for i := 0; i < count; i++ {
|
|
d := fmt.Sprintf("D%d", i)
|
|
g.Add(d)
|
|
for j := 0; j < count; j++ {
|
|
g.Connect(BasicEdge(d, fmt.Sprintf("A%d", j)))
|
|
g.Connect(BasicEdge(d, fmt.Sprintf("B%d", j)))
|
|
g.Connect(BasicEdge(d, fmt.Sprintf("C%d", j)))
|
|
}
|
|
}
|
|
|
|
b.StartTimer()
|
|
// Find dependencies for every node
|
|
for _, v := range g.Vertices() {
|
|
_, err := g.Ancestors(v)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// reduce the final graph
|
|
g.TransitiveReduction()
|
|
}
|
|
}
|
|
|
|
func TestAcyclicGraph_ReverseDepthFirstWalk_WithRemoval(t *testing.T) {
|
|
var g AcyclicGraph
|
|
g.Add(1)
|
|
g.Add(2)
|
|
g.Add(3)
|
|
g.Connect(BasicEdge(3, 2))
|
|
g.Connect(BasicEdge(2, 1))
|
|
|
|
var visits []Vertex
|
|
var lock sync.Mutex
|
|
err := g.SortedReverseDepthFirstWalk([]Vertex{1}, func(v Vertex, d int) error {
|
|
lock.Lock()
|
|
defer lock.Unlock()
|
|
visits = append(visits, v)
|
|
g.Remove(v)
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
t.Fatalf("err: %s", err)
|
|
}
|
|
|
|
expected := []Vertex{1, 2, 3}
|
|
if !reflect.DeepEqual(visits, expected) {
|
|
t.Fatalf("expected: %#v, got: %#v", expected, visits)
|
|
}
|
|
}
|
|
|
|
const testGraphTransReductionStr = `
|
|
1
|
|
2
|
|
2
|
|
3
|
|
3
|
|
`
|
|
|
|
const testGraphTransReductionMoreStr = `
|
|
1
|
|
2
|
|
2
|
|
3
|
|
3
|
|
4
|
|
4
|
|
`
|