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 TestParseHost(t *testing.T) { if addr := ParseHost("127.0.0.1", 4243, "0.0.0.0"); 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 := ParseHost("127.0.0.1", 4243, "0.0.0.1:5555"); 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 := ParseHost("127.0.0.1", 4243, ":6666"); addr != "tcp://127.0.0.1:6666" { t.Errorf(":6666 -> expected tcp://127.0.0.1:6666, got %s", addr) } if addr := ParseHost("127.0.0.1", 4243, "tcp://:7777"); addr != "tcp://127.0.0.1:7777" { t.Errorf("tcp://:7777 -> expected tcp://127.0.0.1:7777, got %s", addr) } if addr := ParseHost("127.0.0.1", 4243, "unix:///var/run/docker.sock"); addr != "unix:///var/run/docker.sock" { t.Errorf("unix:///var/run/docker.sock -> expected unix:///var/run/docker.sock, 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]) } }