382 lines
6.9 KiB
Go
382 lines
6.9 KiB
Go
package depgraph
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
"strings"
|
|
"sync"
|
|
"testing"
|
|
)
|
|
|
|
// ParseNouns is used to parse a string in the format of:
|
|
// a -> b ; edge name
|
|
// b -> c
|
|
// Into a series of nouns and dependencies
|
|
func ParseNouns(s string) map[string]*Noun {
|
|
lines := strings.Split(s, "\n")
|
|
nodes := make(map[string]*Noun)
|
|
for _, line := range lines {
|
|
var edgeName string
|
|
if idx := strings.Index(line, ";"); idx >= 0 {
|
|
edgeName = strings.Trim(line[idx+1:], " \t\r\n")
|
|
line = line[:idx]
|
|
}
|
|
parts := strings.SplitN(line, "->", 2)
|
|
if len(parts) != 2 {
|
|
continue
|
|
}
|
|
head_name := strings.Trim(parts[0], " \t\r\n")
|
|
tail_name := strings.Trim(parts[1], " \t\r\n")
|
|
head := nodes[head_name]
|
|
if head == nil {
|
|
head = &Noun{Name: head_name}
|
|
nodes[head_name] = head
|
|
}
|
|
tail := nodes[tail_name]
|
|
if tail == nil {
|
|
tail = &Noun{Name: tail_name}
|
|
nodes[tail_name] = tail
|
|
}
|
|
edge := &Dependency{
|
|
Name: edgeName,
|
|
Source: head,
|
|
Target: tail,
|
|
}
|
|
head.Deps = append(head.Deps, edge)
|
|
}
|
|
return nodes
|
|
}
|
|
|
|
func NounMapToList(m map[string]*Noun) []*Noun {
|
|
list := make([]*Noun, 0, len(m))
|
|
for _, n := range m {
|
|
list = append(list, n)
|
|
}
|
|
return list
|
|
}
|
|
|
|
func TestGraph_String(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
a -> c
|
|
b -> d
|
|
b -> e
|
|
c -> d
|
|
c -> e`)
|
|
|
|
g := &Graph{
|
|
Name: "Test",
|
|
Nouns: NounMapToList(nodes),
|
|
Root: nodes["a"],
|
|
}
|
|
actual := g.String()
|
|
|
|
expected := `
|
|
root: a
|
|
a -> b
|
|
a -> c
|
|
a
|
|
a -> b
|
|
a -> c
|
|
b
|
|
b -> d
|
|
b -> e
|
|
c
|
|
c -> d
|
|
c -> e
|
|
d
|
|
e
|
|
`
|
|
|
|
actual = strings.TrimSpace(actual)
|
|
expected = strings.TrimSpace(expected)
|
|
if actual != expected {
|
|
t.Fatalf("bad:\n%s\n!=\n%s", actual, expected)
|
|
}
|
|
}
|
|
|
|
func TestGraph_Validate(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
a -> c
|
|
b -> d
|
|
b -> e
|
|
c -> d
|
|
c -> e`)
|
|
list := NounMapToList(nodes)
|
|
|
|
g := &Graph{Name: "Test", Nouns: list}
|
|
if err := g.Validate(); err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestGraph_Validate_Cycle(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
a -> c
|
|
b -> d
|
|
d -> b`)
|
|
list := NounMapToList(nodes)
|
|
|
|
g := &Graph{Name: "Test", Nouns: list}
|
|
err := g.Validate()
|
|
if err == nil {
|
|
t.Fatalf("expected err")
|
|
}
|
|
|
|
vErr, ok := err.(*ValidateError)
|
|
if !ok {
|
|
t.Fatalf("expected validate error")
|
|
}
|
|
|
|
if len(vErr.Cycles) != 1 {
|
|
t.Fatalf("expected cycles")
|
|
}
|
|
|
|
cycle := vErr.Cycles[0]
|
|
if cycle[0].Name != "d" {
|
|
t.Fatalf("bad: %v", cycle)
|
|
}
|
|
if cycle[1].Name != "b" {
|
|
t.Fatalf("bad: %v", cycle)
|
|
}
|
|
}
|
|
|
|
func TestGraph_Validate_MultiRoot(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
c -> d`)
|
|
list := NounMapToList(nodes)
|
|
|
|
g := &Graph{Name: "Test", Nouns: list}
|
|
err := g.Validate()
|
|
if err == nil {
|
|
t.Fatalf("expected err")
|
|
}
|
|
|
|
vErr, ok := err.(*ValidateError)
|
|
if !ok {
|
|
t.Fatalf("expected validate error")
|
|
}
|
|
|
|
if !vErr.MissingRoot {
|
|
t.Fatalf("expected missing root")
|
|
}
|
|
}
|
|
|
|
func TestGraph_Validate_NoRoot(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
b -> a`)
|
|
list := NounMapToList(nodes)
|
|
|
|
g := &Graph{Name: "Test", Nouns: list}
|
|
err := g.Validate()
|
|
if err == nil {
|
|
t.Fatalf("expected err")
|
|
}
|
|
|
|
vErr, ok := err.(*ValidateError)
|
|
if !ok {
|
|
t.Fatalf("expected validate error")
|
|
}
|
|
|
|
if !vErr.MissingRoot {
|
|
t.Fatalf("expected missing root")
|
|
}
|
|
}
|
|
|
|
func TestGraph_Validate_Unreachable(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
a -> c
|
|
b -> d
|
|
x -> x`)
|
|
list := NounMapToList(nodes)
|
|
|
|
g := &Graph{Name: "Test", Nouns: list}
|
|
err := g.Validate()
|
|
if err == nil {
|
|
t.Fatalf("expected err")
|
|
}
|
|
|
|
vErr, ok := err.(*ValidateError)
|
|
if !ok {
|
|
t.Fatalf("expected validate error")
|
|
}
|
|
|
|
if len(vErr.Unreachable) != 1 {
|
|
t.Fatalf("expected unreachable")
|
|
}
|
|
|
|
if vErr.Unreachable[0].Name != "x" {
|
|
t.Fatalf("bad: %v", vErr.Unreachable[0])
|
|
}
|
|
}
|
|
|
|
type VersionMeta int
|
|
type VersionConstraint struct {
|
|
Min int
|
|
Max int
|
|
}
|
|
|
|
func (v *VersionConstraint) Satisfied(head, tail *Noun) (bool, error) {
|
|
vers := int(tail.Meta.(VersionMeta))
|
|
if vers < v.Min {
|
|
return false, fmt.Errorf("version %d below minimum %d",
|
|
vers, v.Min)
|
|
} else if vers > v.Max {
|
|
return false, fmt.Errorf("version %d above maximum %d",
|
|
vers, v.Max)
|
|
}
|
|
return true, nil
|
|
}
|
|
|
|
func (v *VersionConstraint) String() string {
|
|
return "version"
|
|
}
|
|
|
|
func TestGraph_ConstraintViolation(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
a -> c
|
|
b -> d
|
|
b -> e
|
|
c -> d
|
|
c -> e`)
|
|
list := NounMapToList(nodes)
|
|
|
|
// Add a version constraint
|
|
vers := &VersionConstraint{1, 3}
|
|
|
|
// Introduce some constraints
|
|
depB := nodes["a"].Deps[0]
|
|
depB.Constraints = []Constraint{vers}
|
|
depC := nodes["a"].Deps[1]
|
|
depC.Constraints = []Constraint{vers}
|
|
|
|
// Add some versions
|
|
nodes["b"].Meta = VersionMeta(0)
|
|
nodes["c"].Meta = VersionMeta(4)
|
|
|
|
g := &Graph{Name: "Test", Nouns: list}
|
|
err := g.Validate()
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
err = g.CheckConstraints()
|
|
if err == nil {
|
|
t.Fatalf("Expected err")
|
|
}
|
|
|
|
cErr, ok := err.(*ConstraintError)
|
|
if !ok {
|
|
t.Fatalf("expected constraint error")
|
|
}
|
|
|
|
if len(cErr.Violations) != 2 {
|
|
t.Fatalf("expected 2 violations: %v", cErr)
|
|
}
|
|
|
|
if cErr.Violations[0].Error() != "Constraint version between a and b violated: version 0 below minimum 1" {
|
|
t.Fatalf("err: %v", cErr.Violations[0])
|
|
}
|
|
|
|
if cErr.Violations[1].Error() != "Constraint version between a and c violated: version 4 above maximum 3" {
|
|
t.Fatalf("err: %v", cErr.Violations[1])
|
|
}
|
|
}
|
|
|
|
func TestGraph_Constraint_NoViolation(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
a -> c
|
|
b -> d
|
|
b -> e
|
|
c -> d
|
|
c -> e`)
|
|
list := NounMapToList(nodes)
|
|
|
|
// Add a version constraint
|
|
vers := &VersionConstraint{1, 3}
|
|
|
|
// Introduce some constraints
|
|
depB := nodes["a"].Deps[0]
|
|
depB.Constraints = []Constraint{vers}
|
|
depC := nodes["a"].Deps[1]
|
|
depC.Constraints = []Constraint{vers}
|
|
|
|
// Add some versions
|
|
nodes["b"].Meta = VersionMeta(2)
|
|
nodes["c"].Meta = VersionMeta(3)
|
|
|
|
g := &Graph{Name: "Test", Nouns: list}
|
|
err := g.Validate()
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
|
|
err = g.CheckConstraints()
|
|
if err != nil {
|
|
t.Fatalf("err: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestGraphWalk(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
a -> c
|
|
b -> d
|
|
b -> e
|
|
c -> d
|
|
c -> e`)
|
|
list := NounMapToList(nodes)
|
|
g := &Graph{Name: "Test", Nouns: list}
|
|
if err := g.Validate(); err != nil {
|
|
t.Fatalf("err: %s", err)
|
|
}
|
|
|
|
var namesLock sync.Mutex
|
|
names := make([]string, 0, 0)
|
|
err := g.Walk(func(n *Noun) error {
|
|
namesLock.Lock()
|
|
defer namesLock.Unlock()
|
|
names = append(names, n.Name)
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
t.Fatalf("err: %s", err)
|
|
}
|
|
|
|
expected := [][]string{
|
|
{"e", "d", "c", "b", "a"},
|
|
{"e", "d", "b", "c", "a"},
|
|
{"d", "e", "c", "b", "a"},
|
|
{"d", "e", "b", "c", "a"},
|
|
}
|
|
found := false
|
|
for _, expect := range expected {
|
|
if reflect.DeepEqual(expect, names) {
|
|
found = true
|
|
break
|
|
}
|
|
}
|
|
if !found {
|
|
t.Fatalf("bad: %#v", names)
|
|
}
|
|
}
|
|
|
|
func TestGraphWalk_error(t *testing.T) {
|
|
nodes := ParseNouns(`a -> b
|
|
a -> c
|
|
b -> d
|
|
b -> e
|
|
c -> d
|
|
c -> e`)
|
|
list := NounMapToList(nodes)
|
|
g := &Graph{Name: "Test", Nouns: list}
|
|
if err := g.Validate(); err != nil {
|
|
t.Fatalf("err: %s", err)
|
|
}
|
|
|
|
err := g.Walk(func(n *Noun) error {
|
|
return fmt.Errorf("foo")
|
|
})
|
|
if err == nil {
|
|
t.Fatal("should error")
|
|
}
|
|
}
|