package utils
import (
"bytes"
"errors"
"io"
"io/ioutil"
"strings"
"testing"
)
func TestBufReader(t *testing.T) {
reader, writer := io.Pipe()
bufreader := NewBufReader(reader)
// Write everything down to a Pipe
// Usually, a pipe should block but because of the buffered reader,
// the writes will go through
done := make(chan bool)
go func() {
writer.Write([]byte("hello world"))
writer.Close()
done <- true
}()
// Drain the reader *after* everything has been written, just to verify
// it is indeed buffering
<-done
output, err := ioutil.ReadAll(bufreader)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(output, []byte("hello world")) {
t.Error(string(output))
}
}
type dummyWriter struct {
buffer bytes.Buffer
failOnWrite bool
}
func (dw *dummyWriter) Write(p []byte) (n int, err error) {
if dw.failOnWrite {
return 0, errors.New("Fake fail")
}
return dw.buffer.Write(p)
}
func (dw *dummyWriter) String() string {
return dw.buffer.String()
}
func (dw *dummyWriter) Close() error {
return nil
}
func TestWriteBroadcaster(t *testing.T) {
writer := NewWriteBroadcaster()
// Test 1: Both bufferA and bufferB should contain "foo"
bufferA := &dummyWriter{}
writer.AddWriter(bufferA, "")
bufferB := &dummyWriter{}
writer.AddWriter(bufferB, "")
writer.Write([]byte("foo"))
if bufferA.String() != "foo" {
t.Errorf("Buffer contains %v", bufferA.String())
}
if bufferB.String() != "foo" {
t.Errorf("Buffer contains %v", bufferB.String())
}
// Test2: bufferA and bufferB should contain "foobar",
// while bufferC should only contain "bar"
bufferC := &dummyWriter{}
writer.AddWriter(bufferC, "")
writer.Write([]byte("bar"))
if bufferA.String() != "foobar" {
t.Errorf("Buffer contains %v", bufferA.String())
}
if bufferB.String() != "foobar" {
t.Errorf("Buffer contains %v", bufferB.String())
}
if bufferC.String() != "bar" {
t.Errorf("Buffer contains %v", bufferC.String())
}
// Test3: Test eviction on failure
bufferA.failOnWrite = true
writer.Write([]byte("fail"))
if bufferA.String() != "foobar" {
t.Errorf("Buffer contains %v", bufferA.String())
}
if bufferC.String() != "barfail" {
t.Errorf("Buffer contains %v", bufferC.String())
}
// Even though we reset the flag, no more writes should go in there
bufferA.failOnWrite = false
writer.Write([]byte("test"))
if bufferA.String() != "foobar" {
t.Errorf("Buffer contains %v", bufferA.String())
}
if bufferC.String() != "barfailtest" {
t.Errorf("Buffer contains %v", bufferC.String())
}
writer.CloseWriters()
}
type devNullCloser int
func (d devNullCloser) Close() error {
return nil
}
func (d devNullCloser) Write(buf []byte) (int, error) {
return len(buf), nil
}
// This test checks for races. It is only useful when run with the race detector.
func TestRaceWriteBroadcaster(t *testing.T) {
writer := NewWriteBroadcaster()
c := make(chan bool)
go func() {
writer.AddWriter(devNullCloser(0), "")
c <- true
}()
writer.Write([]byte("hello"))
<-c
}
// Test the behavior of TruncIndex, an index for querying IDs from a non-conflicting prefix.
func TestTruncIndex(t *testing.T) {
index := NewTruncIndex()
// Get on an empty index
if _, err := index.Get("foobar"); err == nil {
t.Fatal("Get on an empty index should return an error")
}
// Spaces should be illegal in an id
if err := index.Add("I have a space"); err == nil {
t.Fatalf("Adding an id with ' ' should return an error")
}
id := "99b36c2c326ccc11e726eee6ee78a0baf166ef96"
// Add an id
if err := index.Add(id); err != nil {
t.Fatal(err)
}
// Get a non-existing id
assertIndexGet(t, index, "abracadabra", "", true)
// Get the exact id
assertIndexGet(t, index, id, id, false)
// The first letter should match
assertIndexGet(t, index, id[:1], id, false)
// The first half should match
assertIndexGet(t, index, id[:len(id)/2], id, false)
// The second half should NOT match
assertIndexGet(t, index, id[len(id)/2:], "", true)
id2 := id[:6] + "blabla"
// Add an id
if err := index.Add(id2); err != nil {
t.Fatal(err)
}
// Both exact IDs should work
assertIndexGet(t, index, id, id, false)
assertIndexGet(t, index, id2, id2, false)
// 6 characters or less should conflict
assertIndexGet(t, index, id[:6], "", true)
assertIndexGet(t, index, id[:4], "", true)
assertIndexGet(t, index, id[:1], "", true)
// 7 characters should NOT conflict
assertIndexGet(t, index, id[:7], id, false)
assertIndexGet(t, index, id2[:7], id2, false)
// Deleting a non-existing id should return an error
if err := index.Delete("non-existing"); err == nil {
t.Fatalf("Deleting a non-existing id should return an error")
}
// Deleting id2 should remove conflicts
if err := index.Delete(id2); err != nil {
t.Fatal(err)
}
// id2 should no longer work
assertIndexGet(t, index, id2, "", true)
assertIndexGet(t, index, id2[:7], "", true)
assertIndexGet(t, index, id2[:11], "", true)
// conflicts between id and id2 should be gone
assertIndexGet(t, index, id[:6], id, false)
assertIndexGet(t, index, id[:4], id, false)
assertIndexGet(t, index, id[:1], id, false)
// non-conflicting substrings should still not conflict
assertIndexGet(t, index, id[:7], id, false)
assertIndexGet(t, index, id[:15], id, false)
assertIndexGet(t, index, id, id, false)
}
func assertIndexGet(t *testing.T, index *TruncIndex, input, expectedResult string, expectError bool) {
if result, err := index.Get(input); err != nil && !expectError {
t.Fatalf("Unexpected error getting '%s': %s", input, err)
} else if err == nil && expectError {
t.Fatalf("Getting '%s' should return an error", input)
} else if result != expectedResult {
t.Fatalf("Getting '%s' returned '%s' instead of '%s'", input, result, expectedResult)
}
}
func assertKernelVersion(t *testing.T, a, b *KernelVersionInfo, result int) {
if r := CompareKernelVersion(a, b); r != result {
t.Fatalf("Unexpected kernel version comparison result. Found %d, expected %d", r, result)
}
}
func TestCompareKernelVersion(t *testing.T) {
assertKernelVersion(t,
&KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0},
&KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0},
0)
assertKernelVersion(t,
&KernelVersionInfo{Kernel: 2, Major: 6, Minor: 0},
&KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0},
-1)
assertKernelVersion(t,
&KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0},
&KernelVersionInfo{Kernel: 2, Major: 6, Minor: 0},
1)
assertKernelVersion(t,
&KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0, Flavor: "0"},
&KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0, Flavor: "16"},
0)
assertKernelVersion(t,
&KernelVersionInfo{Kernel: 3, Major: 8, Minor: 5},
&KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0},
1)
assertKernelVersion(t,
&KernelVersionInfo{Kernel: 3, Major: 0, Minor: 20, Flavor: "25"},
&KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0, Flavor: "0"},
-1)
}
func TestHumanSize(t *testing.T) {
size := strings.Trim(HumanSize(1000), " \t")
expect := "1 kB"
if size != expect {
t.Errorf("1000 -> expected '%s', got '%s'", expect, size)
}
size = strings.Trim(HumanSize(1024), " \t")
expect = "1.024 kB"
if size != expect {
t.Errorf("1024 -> expected '%s', got '%s'", expect, size)
}
}
func TestRAMInBytes(t *testing.T) {
assertRAMInBytes(t, "32", false, 32)
assertRAMInBytes(t, "32b", false, 32)
assertRAMInBytes(t, "32B", false, 32)
assertRAMInBytes(t, "32k", false, 32*1024)
assertRAMInBytes(t, "32K", false, 32*1024)
assertRAMInBytes(t, "32kb", false, 32*1024)
assertRAMInBytes(t, "32Kb", false, 32*1024)
assertRAMInBytes(t, "32Mb", false, 32*1024*1024)
assertRAMInBytes(t, "32Gb", false, 32*1024*1024*1024)
assertRAMInBytes(t, "", true, -1)
assertRAMInBytes(t, "hello", true, -1)
assertRAMInBytes(t, "-32", true, -1)
assertRAMInBytes(t, " 32 ", true, -1)
assertRAMInBytes(t, "32 mb", true, -1)
assertRAMInBytes(t, "32m b", true, -1)
assertRAMInBytes(t, "32bm", true, -1)
}
func assertRAMInBytes(t *testing.T, size string, expectError bool, expectedBytes int64) {
actualBytes, err := RAMInBytes(size)
if (err != nil) && !expectError {
t.Errorf("Unexpected error parsing '%s': %s", size, err)
}
if (err == nil) && expectError {
t.Errorf("Expected to get an error parsing '%s', but got none (bytes=%d)", size, actualBytes)
}
if actualBytes != expectedBytes {
t.Errorf("Expected '%s' to parse as %d bytes, got %d", size, expectedBytes, actualBytes)
}
}
func TestParseHost(t *testing.T) {
var (
defaultHttpHost = "127.0.0.1"
defaultHttpPort = 4243
defaultUnix = "/var/run/docker.sock"
)
if addr, err := ParseHost(defaultHttpHost, defaultHttpPort, defaultUnix, "0.0.0.0"); err != nil || addr != "tcp://0.0.0.0:4243" {
t.Errorf("0.0.0.0 -> expected tcp://0.0.0.0:4243, got %s", addr)
}
if addr, err := ParseHost(defaultHttpHost, defaultHttpPort, defaultUnix, "0.0.0.1:5555"); err != nil || addr != "tcp://0.0.0.1:5555" {
t.Errorf("0.0.0.1:5555 -> expected tcp://0.0.0.1:5555, got %s", addr)
}
if addr, err := ParseHost(defaultHttpHost, defaultHttpPort, defaultUnix, ":6666"); err != nil || addr != "tcp://127.0.0.1:6666" {
t.Errorf(":6666 -> expected tcp://127.0.0.1:6666, got %s", addr)
}
if addr, err := ParseHost(defaultHttpHost, defaultHttpPort, defaultUnix, "tcp://:7777"); err != nil || addr != "tcp://127.0.0.1:7777" {
t.Errorf("tcp://:7777 -> expected tcp://127.0.0.1:7777, got %s", addr)
}
if addr, err := ParseHost(defaultHttpHost, defaultHttpPort, defaultUnix, "unix:///var/run/docker.sock"); err != nil || addr != "unix:///var/run/docker.sock" {
t.Errorf("unix:///var/run/docker.sock -> expected unix:///var/run/docker.sock, got %s", addr)
}
if addr, err := ParseHost(defaultHttpHost, defaultHttpPort, defaultUnix, "unix://"); err != nil || addr != "unix:///var/run/docker.sock" {
t.Errorf("unix:///var/run/docker.sock -> expected unix:///var/run/docker.sock, got %s", addr)
}
if addr, err := ParseHost(defaultHttpHost, defaultHttpPort, defaultUnix, "udp://127.0.0.1"); err == nil {
t.Errorf("udp protocol address expected error return, but err == nil. Got %s", addr)
}
if addr, err := ParseHost(defaultHttpHost, defaultHttpPort, defaultUnix, "udp://127.0.0.1:4243"); err == nil {
t.Errorf("udp protocol address expected error return, but err == nil. Got %s", addr)
}
}
func TestParseRepositoryTag(t *testing.T) {
if repo, tag := ParseRepositoryTag("root"); repo != "root" || tag != "" {
t.Errorf("Expected repo: '%s' and tag: '%s', got '%s' and '%s'", "root", "", repo, tag)
}
if repo, tag := ParseRepositoryTag("root:tag"); repo != "root" || tag != "tag" {
t.Errorf("Expected repo: '%s' and tag: '%s', got '%s' and '%s'", "root", "tag", repo, tag)
}
if repo, tag := ParseRepositoryTag("user/repo"); repo != "user/repo" || tag != "" {
t.Errorf("Expected repo: '%s' and tag: '%s', got '%s' and '%s'", "user/repo", "", repo, tag)
}
if repo, tag := ParseRepositoryTag("user/repo:tag"); repo != "user/repo" || tag != "tag" {
t.Errorf("Expected repo: '%s' and tag: '%s', got '%s' and '%s'", "user/repo", "tag", repo, tag)
}
if repo, tag := ParseRepositoryTag("url:5000/repo"); repo != "url:5000/repo" || tag != "" {
t.Errorf("Expected repo: '%s' and tag: '%s', got '%s' and '%s'", "url:5000/repo", "", repo, tag)
}
if repo, tag := ParseRepositoryTag("url:5000/repo:tag"); repo != "url:5000/repo" || tag != "tag" {
t.Errorf("Expected repo: '%s' and tag: '%s', got '%s' and '%s'", "url:5000/repo", "tag", repo, tag)
}
}
func TestGetResolvConf(t *testing.T) {
resolvConfUtils, err := GetResolvConf()
if err != nil {
t.Fatal(err)
}
resolvConfSystem, err := ioutil.ReadFile("/etc/resolv.conf")
if err != nil {
t.Fatal(err)
}
if string(resolvConfUtils) != string(resolvConfSystem) {
t.Fatalf("/etc/resolv.conf and GetResolvConf have different content.")
}
}
func TestCheckLocalDns(t *testing.T) {
for resolv, result := range map[string]bool{`# Dynamic
nameserver 10.0.2.3
search dotcloud.net`: false,
`# Dynamic
#nameserver 127.0.0.1
nameserver 10.0.2.3
search dotcloud.net`: false,
`# Dynamic
nameserver 10.0.2.3 #not used 127.0.1.1
search dotcloud.net`: false,
`# Dynamic
#nameserver 10.0.2.3
#search dotcloud.net`: true,
`# Dynamic
nameserver 127.0.0.1
search dotcloud.net`: true,
`# Dynamic
nameserver 127.0.1.1
search dotcloud.net`: true,
`# Dynamic
`: true,
``: true,
} {
if CheckLocalDns([]byte(resolv)) != result {
t.Fatalf("Wrong local dns detection: {%s} should be %v", resolv, result)
}
}
}
func assertParseRelease(t *testing.T, release string, b *KernelVersionInfo, result int) {
var (
a *KernelVersionInfo
)
a, _ = ParseRelease(release)
if r := CompareKernelVersion(a, b); r != result {
t.Fatalf("Unexpected kernel version comparison result. Found %d, expected %d", r, result)
}
}
func TestParseRelease(t *testing.T) {
assertParseRelease(t, "3.8.0", &KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0}, 0)
assertParseRelease(t, "3.4.54.longterm-1", &KernelVersionInfo{Kernel: 3, Major: 4, Minor: 54}, 0)
assertParseRelease(t, "3.4.54.longterm-1", &KernelVersionInfo{Kernel: 3, Major: 4, Minor: 54, Flavor: "1"}, 0)
assertParseRelease(t, "3.8.0-19-generic", &KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0, Flavor: "19-generic"}, 0)
}
func TestDependencyGraphCircular(t *testing.T) {
g1 := NewDependencyGraph()
a := g1.NewNode("a")
b := g1.NewNode("b")
g1.AddDependency(a, b)
g1.AddDependency(b, a)
res, err := g1.GenerateTraversalMap()
if res != nil {
t.Fatalf("Expected nil result")
}
if err == nil {
t.Fatalf("Expected error (circular graph can not be resolved)")
}
}
func TestDependencyGraph(t *testing.T) {
g1 := NewDependencyGraph()
a := g1.NewNode("a")
b := g1.NewNode("b")
c := g1.NewNode("c")
d := g1.NewNode("d")
g1.AddDependency(b, a)
g1.AddDependency(c, a)
g1.AddDependency(d, c)
g1.AddDependency(d, b)
res, err := g1.GenerateTraversalMap()
if err != nil {
t.Fatalf("%s", err)
}
if res == nil {
t.Fatalf("Unexpected nil result")
}
if len(res) != 3 {
t.Fatalf("Expected map of length 3, found %d instead", len(res))
}
if len(res[0]) != 1 || res[0][0] != "a" {
t.Fatalf("Expected [a], found %v instead", res[0])
}
if len(res[1]) != 2 {
t.Fatalf("Expected 2 nodes for step 2, found %d", len(res[1]))
}
if (res[1][0] != "b" && res[1][1] != "b") || (res[1][0] != "c" && res[1][1] != "c") {
t.Fatalf("Expected [b, c], found %v instead", res[1])
}
if len(res[2]) != 1 || res[2][0] != "d" {
t.Fatalf("Expected [d], found %v instead", res[2])
}
}
func TestParsePortMapping(t *testing.T) {
data, err := PartParser("ip:public:private", "192.168.1.1:80:8080")
if err != nil {
t.Fatal(err)
}
if len(data) != 3 {
t.FailNow()
}
if data["ip"] != "192.168.1.1" {
t.Fail()
}
if data["public"] != "80" {
t.Fail()
}
if data["private"] != "8080" {
t.Fail()
}
}
func TestGetNameserversAsCIDR(t *testing.T) {
for resolv, result := range map[string][]string{`
nameserver 1.2.3.4
nameserver 40.3.200.10
search example.com`: {"1.2.3.4/32", "40.3.200.10/32"},
`search example.com`: {},
`nameserver 1.2.3.4
search example.com
nameserver 4.30.20.100`: {"1.2.3.4/32", "4.30.20.100/32"},
``: {},
` nameserver 1.2.3.4 `: {"1.2.3.4/32"},
`search example.com
nameserver 1.2.3.4
#nameserver 4.3.2.1`: {"1.2.3.4/32"},
`search example.com
nameserver 1.2.3.4 # not 4.3.2.1`: {"1.2.3.4/32"},
} {
test := GetNameserversAsCIDR([]byte(resolv))
if !StrSlicesEqual(test, result) {
t.Fatalf("Wrong nameserver string {%s} should be %v. Input: %s", test, result, resolv)
}
}
}
func StrSlicesEqual(a, b []string) bool {
if len(a) != len(b) {
return false
}
for i, v := range a {
if v != b[i] {
return false
}
}
return true
}