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Copy pathmarshal_test.go
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408 lines (347 loc) · 7.58 KB
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package dag
import (
"bytes"
"encoding/json"
"strings"
"testing"
)
func TestGraphDot_empty(t *testing.T) {
var g Graph
g.Add(1)
g.Add(2)
g.Add(3)
actual := strings.TrimSpace(string(g.Dot(nil)))
expected := strings.TrimSpace(testGraphDotEmptyStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
func TestGraphDot_basic(t *testing.T) {
var g Graph
g.Add(1)
g.Add(2)
g.Add(3)
g.Connect(BasicEdge(1, 3))
actual := strings.TrimSpace(string(g.Dot(nil)))
expected := strings.TrimSpace(testGraphDotBasicStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
func TestGraphDot_attrs(t *testing.T) {
var g Graph
g.Add(&testGraphNodeDotter{
Result: &DotNode{
Name: "foo",
Attrs: map[string]string{"foo": "bar"},
},
})
actual := strings.TrimSpace(string(g.Dot(nil)))
expected := strings.TrimSpace(testGraphDotAttrsStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
type testGraphNodeDotter struct{ Result *DotNode }
func (n *testGraphNodeDotter) Name() string { return n.Result.Name }
func (n *testGraphNodeDotter) DotNode(string, *DotOpts) *DotNode { return n.Result }
const testGraphDotBasicStr = `digraph {
compound = "true"
newrank = "true"
subgraph "root" {
"[root] 1" -> "[root] 3"
}
}
`
const testGraphDotEmptyStr = `digraph {
compound = "true"
newrank = "true"
subgraph "root" {
}
}`
const testGraphDotAttrsStr = `digraph {
compound = "true"
newrank = "true"
subgraph "root" {
"[root] foo" [foo = "bar"]
}
}`
func TestGraphJSON_empty(t *testing.T) {
var g Graph
g.Add(1)
g.Add(2)
g.Add(3)
js, err := g.MarshalJSON()
if err != nil {
t.Fatal(err)
}
actual := strings.TrimSpace(string(js))
expected := strings.TrimSpace(testGraphJSONEmptyStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
func TestGraphJSON_basic(t *testing.T) {
var g Graph
g.Add(1)
g.Add(2)
g.Add(3)
g.Connect(BasicEdge(1, 3))
js, err := g.MarshalJSON()
if err != nil {
t.Fatal(err)
}
actual := strings.TrimSpace(string(js))
expected := strings.TrimSpace(testGraphJSONBasicStr)
if actual != expected {
t.Fatalf("bad: %s", actual)
}
}
// record some graph transformations, and make sure we get the same graph when
// they're replayed
func TestGraphJSON_basicRecord(t *testing.T) {
var g Graph
var buf bytes.Buffer
g.SetDebugWriter(&buf)
g.Add(1)
g.Add(2)
g.Add(3)
g.Connect(BasicEdge(1, 2))
g.Connect(BasicEdge(1, 3))
g.Connect(BasicEdge(2, 3))
(&AcyclicGraph{g}).TransitiveReduction()
recorded := buf.Bytes()
// the Walk doesn't happen in a determined order, so just count operations
// for now to make sure we wrote stuff out.
if len(bytes.Split(recorded, []byte{'\n'})) != 17 {
t.Fatalf("bad: %s", recorded)
}
original, err := g.MarshalJSON()
if err != nil {
t.Fatal(err)
}
// replay the logs, and marshal the graph back out again
m, err := decodeGraph(bytes.NewReader(buf.Bytes()))
if err != nil {
t.Fatal(err)
}
replayed, err := json.MarshalIndent(m, "", " ")
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(original, replayed) {
t.Fatalf("\noriginal: %s\nreplayed: %s", original, replayed)
}
}
// Verify that Vertex and Edge annotations appear in the debug output
func TestGraphJSON_debugInfo(t *testing.T) {
var g Graph
var buf bytes.Buffer
g.SetDebugWriter(&buf)
g.Add(1)
g.Add(2)
g.Add(3)
g.Connect(BasicEdge(1, 2))
g.DebugVertexInfo(2, "2")
g.DebugVertexInfo(3, "3")
g.DebugEdgeInfo(BasicEdge(1, 2), "1|2")
dec := json.NewDecoder(bytes.NewReader(buf.Bytes()))
var found2, found3, foundEdge bool
for dec.More() {
var d streamDecode
err := dec.Decode(&d)
if err != nil {
t.Fatal(err)
}
switch d.Type {
case typeVertexInfo:
va := &marshalVertexInfo{}
err := json.Unmarshal(d.JSON, va)
if err != nil {
t.Fatal(err)
}
switch va.Info {
case "2":
if va.Vertex.Name != "2" {
t.Fatalf("wrong vertex annotated 2: %#v", va)
}
found2 = true
case "3":
if va.Vertex.Name != "3" {
t.Fatalf("wrong vertex annotated 3: %#v", va)
}
found3 = true
default:
t.Fatalf("unexpected annotation: %#v", va)
}
case typeEdgeInfo:
ea := &marshalEdgeInfo{}
err := json.Unmarshal(d.JSON, ea)
if err != nil {
t.Fatal(err)
}
switch ea.Info {
case "1|2":
if ea.Edge.Name != "1|2" {
t.Fatalf("incorrect edge annotation: %#v\n", ea)
}
foundEdge = true
default:
t.Fatalf("unexpected edge Info: %#v", ea)
}
}
}
if !found2 {
t.Fatal("annotation 2 not found")
}
if !found3 {
t.Fatal("annotation 3 not found")
}
if !foundEdge {
t.Fatal("edge annotation not found")
}
}
// Verify that debug operations appear in the debug output
func TestGraphJSON_debugOperations(t *testing.T) {
var g Graph
var buf bytes.Buffer
g.SetDebugWriter(&buf)
debugOp := g.DebugOperation("AddOne", "adding node 1")
g.Add(1)
debugOp.End("done adding node 1")
// use an immediate closure to test defers
func() {
defer g.DebugOperation("AddTwo", "adding nodes 2 and 3").End("done adding 2 and 3")
g.Add(2)
defer g.DebugOperation("NestedAddThree", "second defer").End("done adding node 3")
g.Add(3)
}()
g.Connect(BasicEdge(1, 2))
dec := json.NewDecoder(bytes.NewReader(buf.Bytes()))
var ops []string
for dec.More() {
var d streamDecode
err := dec.Decode(&d)
if err != nil {
t.Fatal(err)
}
if d.Type != typeOperation {
continue
}
o := &marshalOperation{}
err = json.Unmarshal(d.JSON, o)
if err != nil {
t.Fatal(err)
}
switch {
case o.Begin == "AddOne":
ops = append(ops, "BeginAddOne")
case o.End == "AddOne":
ops = append(ops, "EndAddOne")
case o.Begin == "AddTwo":
ops = append(ops, "BeginAddTwo")
case o.End == "AddTwo":
ops = append(ops, "EndAddTwo")
case o.Begin == "NestedAddThree":
ops = append(ops, "BeginAddThree")
case o.End == "NestedAddThree":
ops = append(ops, "EndAddThree")
}
}
expectedOps := []string{
"BeginAddOne",
"EndAddOne",
"BeginAddTwo",
"BeginAddThree",
"EndAddThree",
"EndAddTwo",
}
if strings.Join(ops, ",") != strings.Join(expectedOps, ",") {
t.Fatalf("incorrect order of operations: %v", ops)
}
}
// Verify that we can replay visiting each vertex in order
func TestGraphJSON_debugVisits(t *testing.T) {
var g Graph
var buf bytes.Buffer
g.SetDebugWriter(&buf)
g.Add(1)
g.Add(2)
g.Add(3)
g.Add(4)
g.Connect(BasicEdge(2, 1))
g.Connect(BasicEdge(4, 2))
g.Connect(BasicEdge(3, 4))
err := (&AcyclicGraph{g}).Walk(func(v Vertex) error {
g.DebugVisitInfo(v, "basic walk")
return nil
})
if err != nil {
t.Fatal(err)
}
var visited []string
dec := json.NewDecoder(bytes.NewReader(buf.Bytes()))
for dec.More() {
var d streamDecode
err := dec.Decode(&d)
if err != nil {
t.Fatal(err)
}
if d.Type != typeVisitInfo {
continue
}
o := &marshalVertexInfo{}
err = json.Unmarshal(d.JSON, o)
if err != nil {
t.Fatal(err)
}
visited = append(visited, o.Vertex.ID)
}
expected := []string{"1", "2", "4", "3"}
if strings.Join(visited, "-") != strings.Join(expected, "-") {
t.Fatalf("incorrect order of operations: %v", visited)
}
}
const testGraphJSONEmptyStr = `{
"Type": "Graph",
"Name": "root",
"Vertices": [
{
"ID": "1",
"Name": "1"
},
{
"ID": "2",
"Name": "2"
},
{
"ID": "3",
"Name": "3"
}
]
}`
const testGraphJSONBasicStr = `{
"Type": "Graph",
"Name": "root",
"Vertices": [
{
"ID": "1",
"Name": "1"
},
{
"ID": "2",
"Name": "2"
},
{
"ID": "3",
"Name": "3"
}
],
"Edges": [
{
"Name": "1|3",
"Source": "1",
"Target": "3"
}
]
}`