Golang spew.NewDefaultConfig函数代码示例

// This example demonstrates how to use ConfigState.Printf to display a variable
// with a format string and inline formatting.
func ExampleConfigState_Printf() {
	// See the top-level Dump example for details on the types used in this
	// example.

	// Create two ConfigState instances and modify the method handling of the
	// first ConfigState only.
	scs := spew.NewDefaultConfig()
	scs2 := spew.NewDefaultConfig()
	scs.DisableMethods = true

	// Alternatively
	// scs := spew.ConfigState{Indent: " ", DisableMethods: true}
	// scs2 := spew.ConfigState{Indent: " "}

	// This is of type Flag which implements a Stringer and has raw value 1.
	f := flagTwo

	// Dump using the ConfigState instances.
	scs.Printf("f: %v\n", f)
	scs2.Printf("f: %v\n", f)

	// Output:
	// f: 1
	// f: flagTwo
}

func main() {
	flag.Parse()
	if len(flag.Args()) != 1 {
		log.Fatal("Usage: go run goprint.go path")
	}
	bpkg, err := build.Default.Import(flag.Args()[0], ".", 0)
	if err != nil {
		log.Fatal(err)
	}
	fset := token.NewFileSet()
	files := make(map[string]*ast.File)
	for _, fname := range bpkg.GoFiles {
		p, err := ioutil.ReadFile(filepath.Join(bpkg.SrcRoot, bpkg.ImportPath, fname))
		if err != nil {
			log.Fatal(err)
		}
		file, err := parser.ParseFile(fset, fname, p, parser.ParseComments)
		if err != nil {
			log.Fatal(err)
		}
		files[fname] = file
	}
	c := spew.NewDefaultConfig()
	c.DisableMethods = true
	apkg, _ := ast.NewPackage(fset, files, importer, nil)
	c.Dump(apkg)
	ast.Print(fset, apkg)
	dpkg := doc.New(apkg, bpkg.ImportPath, 0)
	c.Dump(dpkg)
}

func initSpewTests() {
	// Config states with various settings.
	scsDefault := spew.NewDefaultConfig()
	scsNoMethods := &spew.ConfigState{Indent: " ", DisableMethods: true}
	scsNoPmethods := &spew.ConfigState{Indent: " ", DisablePointerMethods: true}
	scsMaxDepth := &spew.ConfigState{Indent: " ", MaxDepth: 1}

	// Variables for tests on types which implement Stringer interface with and
	// without a pointer receiver.
	ts := stringer("test")
	tps := pstringer("test")

	// depthTester is used to test max depth handling for structs, array, slices
	// and maps.
	type depthTester struct {
		ic    indirCir1
		arr   [1]string
		slice []string
		m     map[string]int
	}
	dt := depthTester{indirCir1{nil}, [1]string{"arr"}, []string{"slice"},
		map[string]int{"one": 1}}

	spewTests = []spewTest{
		{scsDefault, fCSFdump, "", int8(127), "(int8) 127\n"},
		{scsDefault, fCSFprint, "", int16(32767), "32767"},
		{scsDefault, fCSFprintf, "%v", int32(2147483647), "2147483647"},
		{scsDefault, fCSFprintln, "", int(2147483647), "2147483647\n"},
		{scsDefault, fCSPrint, "", int64(9223372036854775807), "9223372036854775807"},
		{scsDefault, fCSPrintln, "", uint8(255), "255\n"},
		{scsDefault, fCSSprint, "", complex(1, 2), "(1+2i)"},
		{scsDefault, fCSSprintf, "%v", complex(float32(3), 4), "(3+4i)"},
		{scsDefault, fCSSprintln, "", complex(float64(5), 6), "(5+6i)\n"},
		{scsDefault, fCSErrorf, "%#v", uint16(65535), "(uint16)65535"},
		{scsDefault, fCSNewFormatter, "%v", uint32(4294967295), "4294967295"},
		{scsDefault, fErrorf, "%v", uint64(18446744073709551615), "18446744073709551615"},
		{scsDefault, fFprint, "", float32(3.14), "3.14"},
		{scsDefault, fFprintln, "", float64(6.28), "6.28\n"},
		{scsDefault, fPrint, "", true, "true"},
		{scsDefault, fPrintln, "", false, "false\n"},
		{scsDefault, fSprint, "", complex(-1, -2), "(-1-2i)"},
		{scsDefault, fSprintf, "%v", complex(float32(-3), -4), "(-3-4i)"},
		{scsDefault, fSprintln, "", complex(float64(-5), -6), "(-5-6i)\n"},
		{scsNoMethods, fCSFprint, "", ts, "test"},
		{scsNoMethods, fCSFprint, "", &ts, "<*>test"},
		{scsNoMethods, fCSFprint, "", tps, "test"},
		{scsNoMethods, fCSFprint, "", &tps, "<*>test"},
		{scsNoPmethods, fCSFprint, "", ts, "stringer test"},
		{scsNoPmethods, fCSFprint, "", &ts, "<*>stringer test"},
		{scsNoPmethods, fCSFprint, "", tps, "test"},
		{scsNoPmethods, fCSFprint, "", &tps, "<*>stringer test"},
		{scsMaxDepth, fCSFprint, "", dt, "{{<max>} [<max>] [<max>] map[<max>]}"},
		{scsMaxDepth, fCSFdump, "", dt, "(spew_test.depthTester) {\n" +
			" ic: (spew_test.indirCir1) {\n  <max depth reached>\n },\n" +
			" arr: ([1]string) {\n  <max depth reached>\n },\n" +
			" slice: ([]string) {\n  <max depth reached>\n },\n" +
			" m: (map[string]int) {\n  <max depth reached>\n }\n}\n"},
	}
}

func main() {
	defer glog.Flush()
	diffConfig := &dm.DifferencerConfig{}
	diffConfig.CreateFlags(flag.CommandLine)
	flag.Parse() // Scan the arguments list

	goioutil.InitGOMAXPROCS()

	cfg := spew.NewDefaultConfig()
	cfg.SortKeys = true
	cfg.Dump("Spew config:\n", cfg)

	cmd := filepath.Base(os.Args[0])
	glog.V(1).Infoln("cmd =", cmd)

	ctrl := GoRtnCntrl{
		stopCh: make(chan bool),
		wg:     &sync.WaitGroup{},
	}

	var stats dm.LeadingWhitespaceStatistics
	fileCh := make(chan *dm.File, runtime.NumCPU())

	ctrl.wg.Add(1)
	go collectStats(fileCh, &stats, ctrl)

	textFileCh := make(chan string, runtime.NumCPU())
	ctrl.wg.Add(1)
	go readAllFiles(runtime.NumCPU(), textFileCh, fileCh, ctrl)

	ftiCtrl := ctrl
	ftiCtrl.wg = &sync.WaitGroup{}
	ftiMgr := MakeFileTypeInfoManager(ftiCtrl)

	ctrl.wg.Add(1)
	expandArgsToTextFiles(flag.Args(), textFileCh, runtime.NumCPU(), ftiMgr, ctrl)

	// Wait for the main pipeline to complete.
	ctrl.wg.Wait()
	close(ctrl.stopCh)

	// Wait for the file type info manager to shutdown.
	ftiCtrl.wg.Wait()

	fmt.Println("Non-text extensions discovered:")
	cfg.Dump(ftiMgr.nonTextTypes)
	fmt.Println("Text extensions discovered:")
	cfg.Dump(ftiMgr.textTypes)

	fmt.Println()
	fmt.Println()
	stats.ComputeFractions()

	fmt.Println("Whitespace info:")
	cfg.Dump(stats)
}

func TestSyncDB(t *testing.T) {
	spew := spew.NewDefaultConfig()
	spew.MaxDepth = 2
	checkSyncDB := func(cloudMachines []provider.Machine,
		databaseMachines []db.Machine, expectedBoot,
		expectedStop []provider.Machine) {
		_, bootResult, stopResult := syncDB(cloudMachines, databaseMachines)
		if !emptySlices(bootResult, expectedBoot) &&
			!reflect.DeepEqual(bootResult, expectedBoot) {
			t.Error(spew.Sprintf(
				"booted wrong machines. Expected %v, got %v.",
				expectedBoot, bootResult))
		}
		if !emptySlices(stopResult, expectedStop) && !reflect.DeepEqual(
			stopResult, expectedStop) {
			t.Error(spew.Sprintf(
				"stopped wrong machines. Expected %v, got %v.",
				expectedStop, stopResult))
		}
	}

	var noMachines []provider.Machine
	dbNoSize := db.Machine{Provider: FakeAmazon}
	cmNoSize := provider.Machine{Provider: FakeAmazon}
	dbLarge := db.Machine{Provider: FakeAmazon, Size: "m4.large"}
	cmLarge := provider.Machine{Provider: FakeAmazon, Size: "m4.large"}

	// Test boot with no size
	checkSyncDB(noMachines, []db.Machine{dbNoSize}, []provider.Machine{cmNoSize},
		noMachines)

	// Test boot with size
	checkSyncDB(noMachines, []db.Machine{dbLarge}, []provider.Machine{cmLarge},
		noMachines)

	// Test mixed boot
	checkSyncDB(noMachines, []db.Machine{dbNoSize, dbLarge}, []provider.Machine{
		cmNoSize, cmLarge}, noMachines)

	// Test partial boot
	checkSyncDB([]provider.Machine{cmNoSize}, []db.Machine{dbNoSize, dbLarge},
		[]provider.Machine{cmLarge}, noMachines)

	// Test stop
	checkSyncDB([]provider.Machine{cmNoSize}, []db.Machine{}, noMachines,
		[]provider.Machine{cmNoSize})

	// Test partial stop
	checkSyncDB([]provider.Machine{cmNoSize, cmLarge}, []db.Machine{}, noMachines,
		[]provider.Machine{cmNoSize, cmLarge})
}

func dumpTIDM(t *tidm.TIDM) error {
	dumpFile, err := os.Create("tidm_dump")
	if err != nil {
		return fmt.Errorf("Error creating dumpfile: %s", err)
	}

	// write spew dump
	io.WriteString(dumpFile, "spew.Dump:\n==========\n")
	cs := spew.NewDefaultConfig()
	cs.Indent = "    "
	cs.Fdump(dumpFile, t)
	io.WriteString(dumpFile, "\n\n\n\n")

	// write json
	io.WriteString(dumpFile, "tidm-json:\n==========\n")
	enc := json.NewEncoder(dumpFile)
	err = enc.Encode(t)
	if err != nil {
		return fmt.Errorf("Error encoding tidm-json to dumpfile: %s", err)
	}

	// all done
	return nil
}

func testIDOnlyRefresh(c TestCase, opts terraform.ContextOpts, step TestStep, r *terraform.ResourceState) error {
	// TODO: We guard by this right now so master doesn't explode. We
	// need to remove this eventually to make this part of the normal tests.
	if os.Getenv("TF_ACC_IDONLY") == "" {
		return nil
	}

	name := fmt.Sprintf("%s.foo", r.Type)

	// Build the state. The state is just the resource with an ID. There
	// are no attributes. We only set what is needed to perform a refresh.
	state := terraform.NewState()
	state.RootModule().Resources[name] = &terraform.ResourceState{
		Type: r.Type,
		Primary: &terraform.InstanceState{
			ID: r.Primary.ID,
		},
	}

	// Create the config module. We use the full config because Refresh
	// doesn't have access to it and we may need things like provider
	// configurations. The initial implementation of id-only checks used
	// an empty config module, but that caused the aforementioned problems.
	mod, err := testModule(opts, step)
	if err != nil {
		return err
	}

	// Initialize the context
	opts.Module = mod
	opts.State = state
	ctx := terraform.NewContext(&opts)
	if ws, es := ctx.Validate(); len(ws) > 0 || len(es) > 0 {
		if len(es) > 0 {
			estrs := make([]string, len(es))
			for i, e := range es {
				estrs[i] = e.Error()
			}
			return fmt.Errorf(
				"Configuration is invalid.\n\nWarnings: %#v\n\nErrors: %#v",
				ws, estrs)
		}

		log.Printf("[WARN] Config warnings: %#v", ws)
	}

	// Refresh!
	state, err = ctx.Refresh()
	if err != nil {
		return fmt.Errorf("Error refreshing: %s", err)
	}

	// Verify attribute equivalence.
	actualR := state.RootModule().Resources[name]
	if actualR == nil {
		return fmt.Errorf("Resource gone!")
	}
	if actualR.Primary == nil {
		return fmt.Errorf("Resource has no primary instance")
	}
	actual := actualR.Primary.Attributes
	expected := r.Primary.Attributes
	// Remove fields we're ignoring
	for _, v := range c.IDRefreshIgnore {
		delete(actual, v)
		delete(expected, v)
	}

	if !reflect.DeepEqual(actual, expected) {
		// Determine only the different attributes
		for k, v := range expected {
			if av, ok := actual[k]; ok && v == av {
				delete(expected, k)
				delete(actual, k)
			}
		}

		spewConf := spew.NewDefaultConfig()
		spewConf.SortKeys = true
		return fmt.Errorf(
			"Attributes not equivalent. Difference is shown below. Top is actual, bottom is expected."+
				"\n\n%s\n\n%s",
			spewConf.Sdump(actual), spewConf.Sdump(expected))
	}

	return nil
}

func initSpewTests() {
	// Config states with various settings.
	scsDefault := spew.NewDefaultConfig()
	scsNoMethods := &spew.ConfigState{Indent: " ", DisableMethods: true}
	scsNoPmethods := &spew.ConfigState{Indent: " ", DisablePointerMethods: true}
	scsMaxDepth := &spew.ConfigState{Indent: " ", MaxDepth: 1}
	scsContinue := &spew.ConfigState{Indent: " ", ContinueOnMethod: true}
	scsNoPtrAddr := &spew.ConfigState{DisablePointerAddresses: true}
	scsNoCap := &spew.ConfigState{DisableCapacities: true}

	// Variables for tests on types which implement Stringer interface with and
	// without a pointer receiver.
	ts := stringer("test")
	tps := pstringer("test")

	type ptrTester struct {
		s *struct{}
	}
	tptr := &ptrTester{s: &struct{}{}}

	// depthTester is used to test max depth handling for structs, array, slices
	// and maps.
	type depthTester struct {
		ic    indirCir1
		arr   [1]string
		slice []string
		m     map[string]int
	}
	dt := depthTester{indirCir1{nil}, [1]string{"arr"}, []string{"slice"},
		map[string]int{"one": 1}}

	// Variable for tests on types which implement error interface.
	te := customError(10)

	spewTests = []spewTest{
		{scsDefault, fCSFdump, "", int8(127), "(int8) 127\n"},
		{scsDefault, fCSFprint, "", int16(32767), "32767"},
		{scsDefault, fCSFprintf, "%v", int32(2147483647), "2147483647"},
		{scsDefault, fCSFprintln, "", int(2147483647), "2147483647\n"},
		{scsDefault, fCSPrint, "", int64(9223372036854775807), "9223372036854775807"},
		{scsDefault, fCSPrintln, "", uint8(255), "255\n"},
		{scsDefault, fCSSdump, "", uint8(64), "(uint8) 64\n"},
		{scsDefault, fCSSprint, "", complex(1, 2), "(1+2i)"},
		{scsDefault, fCSSprintf, "%v", complex(float32(3), 4), "(3+4i)"},
		{scsDefault, fCSSprintln, "", complex(float64(5), 6), "(5+6i)\n"},
		{scsDefault, fCSErrorf, "%#v", uint16(65535), "(uint16)65535"},
		{scsDefault, fCSNewFormatter, "%v", uint32(4294967295), "4294967295"},
		{scsDefault, fErrorf, "%v", uint64(18446744073709551615), "18446744073709551615"},
		{scsDefault, fFprint, "", float32(3.14), "3.14"},
		{scsDefault, fFprintln, "", float64(6.28), "6.28\n"},
		{scsDefault, fPrint, "", true, "true"},
		{scsDefault, fPrintln, "", false, "false\n"},
		{scsDefault, fSdump, "", complex(-10, -20), "(complex128) (-10-20i)\n"},
		{scsDefault, fSprint, "", complex(-1, -2), "(-1-2i)"},
		{scsDefault, fSprintf, "%v", complex(float32(-3), -4), "(-3-4i)"},
		{scsDefault, fSprintln, "", complex(float64(-5), -6), "(-5-6i)\n"},
		{scsNoMethods, fCSFprint, "", ts, "test"},
		{scsNoMethods, fCSFprint, "", &ts, "<*>test"},
		{scsNoMethods, fCSFprint, "", tps, "test"},
		{scsNoMethods, fCSFprint, "", &tps, "<*>test"},
		{scsNoPmethods, fCSFprint, "", ts, "stringer test"},
		{scsNoPmethods, fCSFprint, "", &ts, "<*>stringer test"},
		{scsNoPmethods, fCSFprint, "", tps, "test"},
		{scsNoPmethods, fCSFprint, "", &tps, "<*>stringer test"},
		{scsMaxDepth, fCSFprint, "", dt, "{{<max>} [<max>] [<max>] map[<max>]}"},
		{scsMaxDepth, fCSFdump, "", dt, "(spew_test.depthTester) {\n" +
			" ic: (spew_test.indirCir1) {\n  <max depth reached>\n },\n" +
			" arr: ([1]string) (len=1 cap=1) {\n  <max depth reached>\n },\n" +
			" slice: ([]string) (len=1 cap=1) {\n  <max depth reached>\n },\n" +
			" m: (map[string]int) (len=1) {\n  <max depth reached>\n }\n}\n"},
		{scsContinue, fCSFprint, "", ts, "(stringer test) test"},
		{scsContinue, fCSFdump, "", ts, "(spew_test.stringer) " +
			"(len=4) (stringer test) \"test\"\n"},
		{scsContinue, fCSFprint, "", te, "(error: 10) 10"},
		{scsContinue, fCSFdump, "", te, "(spew_test.customError) " +
			"(error: 10) 10\n"},
		{scsNoPtrAddr, fCSFprint, "", tptr, "<*>{<*>{}}"},
		{scsNoPtrAddr, fCSSdump, "", tptr, "(*spew_test.ptrTester)({\ns: (*struct {})({\n})\n})\n"},
		{scsNoCap, fCSSdump, "", make([]string, 0, 10), "([]string) {\n}\n"},
		{scsNoCap, fCSSdump, "", make([]string, 1, 10), "([]string) (len=1) {\n(string) \"\"\n}\n"},
	}
}

//.........这里部分代码省略.........
	ctx, err := terraform.NewContext(&opts)
	if err != nil {
		return state, err
	}

	// Do the import!
	newState, err := ctx.Import(&terraform.ImportOpts{
		// Set the module so that any provider config is loaded
		Module: mod,

		Targets: []*terraform.ImportTarget{
			&terraform.ImportTarget{
				Addr: step.ResourceName,
				ID:   importId,
			},
		},
	})
	if err != nil {
		log.Printf("[ERROR] Test: ImportState failure: %s", err)
		return state, err
	}

	// Go through the new state and verify
	if step.ImportStateCheck != nil {
		var states []*terraform.InstanceState
		for _, r := range newState.RootModule().Resources {
			if r.Primary != nil {
				states = append(states, r.Primary)
			}
		}
		if err := step.ImportStateCheck(states); err != nil {
			return state, err
		}
	}

	// Verify that all the states match
	if step.ImportStateVerify {
		new := newState.RootModule().Resources
		old := state.RootModule().Resources
		for _, r := range new {
			// Find the existing resource
			var oldR *terraform.ResourceState
			for _, r2 := range old {
				if r2.Primary != nil && r2.Primary.ID == r.Primary.ID {
					oldR = r2
					break
				}
			}
			if oldR == nil {
				return state, fmt.Errorf(
					"Failed state verification, resource with ID %s not found",
					r.Primary.ID)
			}

			// Compare their attributes
			actual := make(map[string]string)
			for k, v := range r.Primary.Attributes {
				actual[k] = v
			}
			expected := make(map[string]string)
			for k, v := range oldR.Primary.Attributes {
				expected[k] = v
			}

			// Remove fields we're ignoring
			for _, v := range step.ImportStateVerifyIgnore {
				for k, _ := range actual {
					if strings.HasPrefix(k, v) {
						delete(actual, k)
					}
				}
				for k, _ := range expected {
					if strings.HasPrefix(k, v) {
						delete(expected, k)
					}
				}
			}

			if !reflect.DeepEqual(actual, expected) {
				// Determine only the different attributes
				for k, v := range expected {
					if av, ok := actual[k]; ok && v == av {
						delete(expected, k)
						delete(actual, k)
					}
				}

				spewConf := spew.NewDefaultConfig()
				spewConf.SortKeys = true
				return state, fmt.Errorf(
					"ImportStateVerify attributes not equivalent. Difference is shown below. Top is actual, bottom is expected."+
						"\n\n%s\n\n%s",
					spewConf.Sdump(actual), spewConf.Sdump(expected))
			}
		}
	}

	// Return the old state (non-imported) so we don't change anything.
	return state, nil
}

func TestACLs(t *testing.T) {
	spew := spew.NewDefaultConfig()
	spew.MaxDepth = 2

	conn := db.New()

	code := `
(define Namespace "Namespace")
(define MasterCount 1)
(define WorkerCount 1)
(makeList MasterCount (machine (provider "Amazon") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (role "Worker")))
(define AdminACL (list "1.2.3.4/32" "local"))`

	myIP = func() (string, error) {
		return "5.6.7.8", nil
	}
	UpdatePolicy(conn, prog(t, code))
	err := conn.Transact(func(view db.Database) error {
		cluster, err := view.GetCluster()

		if err != nil {
			return err
		}

		if !reflect.DeepEqual(cluster.ACLs,
			[]string{"1.2.3.4/32", "5.6.7.8/32"}) {
			return fmt.Errorf("bad ACLs: %s",
				spew.Sdump(cluster.ACLs))
		}

		return nil
	})
	if err != nil {
		t.Error(err.Error())
	}

	myIP = func() (string, error) {
		return "", errors.New("")
	}
	UpdatePolicy(conn, prog(t, code))
	err = conn.Transact(func(view db.Database) error {
		cluster, err := view.GetCluster()

		if err != nil {
			return err
		}

		if !reflect.DeepEqual(cluster.ACLs, []string{"1.2.3.4/32"}) {
			return fmt.Errorf("bad ACLs: %s",
				spew.Sdump(cluster.ACLs))
		}

		return nil
	})
	if err != nil {
		t.Error(err.Error())
	}

	// Test allow traffic between machines
	conn.Transact(func(view db.Database) error {
		machines := view.SelectFromMachine(nil)
		if len(machines) == 0 {
			return errors.New("expected machines in database")
		}
		machines[0].PublicIP = "8.8.8.8"
		view.Commit(machines[0])
		return nil
	})
	UpdatePolicy(conn, prog(t, code))
	err = conn.Transact(func(view db.Database) error {
		cluster, err := view.GetCluster()

		if err != nil {
			return err
		}

		if !reflect.DeepEqual(cluster.ACLs,
			[]string{"1.2.3.4/32", "8.8.8.8/32"}) {
			return fmt.Errorf("bad ACLs: %s",
				spew.Sdump(cluster.ACLs))
		}

		return nil
	})
	if err != nil {
		t.Error(err.Error())
	}
}

func TestSort(t *testing.T) {
	spew := spew.NewDefaultConfig()
	spew.MaxDepth = 2

	conn := db.New()

	UpdatePolicy(conn, prog(t, `
(define Namespace "Namespace")
(define MasterCount 3)
(define WorkerCount 1)
(makeList MasterCount (machine (provider "Amazon") (size "m4.large") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (size "m4.large") (role "Worker")))
(define AdminACL (list))`))
	err := conn.Transact(func(view db.Database) error {
		machines := view.SelectFromMachine(func(m db.Machine) bool {
			return m.Role == db.Master
		})

		if len(machines) != 3 {
			return fmt.Errorf("bad machines: %s", spew.Sdump(machines))
		}

		machines[2].PublicIP = "a"
		machines[2].PrivateIP = "b"
		view.Commit(machines[2])

		machines[1].PrivateIP = "c"
		view.Commit(machines[1])

		return nil
	})
	if err != nil {
		t.Error(err.Error())
	}

	UpdatePolicy(conn, prog(t, `
(define Namespace "Namespace")
(define MasterCount 2)
(define WorkerCount 1)
(makeList MasterCount (machine (provider "Amazon") (size "m4.large") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (size "m4.large") (role "Worker")))
(define AdminACL (list))`))
	err = conn.Transact(func(view db.Database) error {
		machines := view.SelectFromMachine(func(m db.Machine) bool {
			return m.Role == db.Master
		})

		if len(machines) != 2 {
			return fmt.Errorf("bad machines: %s", spew.Sdump(machines))
		}

		for _, m := range machines {
			if m.PublicIP == "" && m.PrivateIP == "" {
				return fmt.Errorf("bad machine: %s",
					spew.Sdump(machines))
			}
		}

		return nil
	})
	if err != nil {
		t.Error(err.Error())
	}

	UpdatePolicy(conn, prog(t, `
(define Namespace "Namespace")
(define MasterCount 1)
(define WorkerCount 1)
(makeList MasterCount (machine (provider "Amazon") (size "m4.large") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (size "m4.large") (role "Worker")))
(define AdminACL (list))`))
	err = conn.Transact(func(view db.Database) error {
		machines := view.SelectFromMachine(func(m db.Machine) bool {
			return m.Role == db.Master
		})

		if len(machines) != 1 {
			return fmt.Errorf("bad machines: %s", spew.Sdump(machines))
		}

		for _, m := range machines {
			if m.PublicIP == "" || m.PrivateIP == "" {
				return fmt.Errorf("bad machine: %s",
					spew.Sdump(machines))
			}
		}

		return nil
	})
	if err != nil {
		t.Error(err.Error())
	}
}

func TestContainer(t *testing.T) {
	spew := spew.NewDefaultConfig()
	spew.MaxDepth = 2
	conn := db.New()

	check := func(code string, red, blue, yellow int) error {
		UpdatePolicy(conn, prog(t, code))
		return conn.Transact(func(view db.Database) error {
			var redCount, blueCount, yellowCount int

			containers := view.SelectFromContainer(nil)
			for _, c := range containers {
				if len(c.Labels) != 1 {
					err := spew.Sprintf("two many labels: %s", c)
					return errors.New(err)
				}

				switch c.Labels[0] {
				case "Red":
					redCount++
				case "Blue":
					blueCount++
				case "Yellow":
					yellowCount++
				default:
					err := spew.Sprintf("unkonwn label: %s", c)
					return errors.New(err)
				}
			}

			if red != redCount || blue != blueCount ||
				yellow != yellowCount {
				return errors.New(
					spew.Sprintf("bad containers: %s", containers))
			}

			return nil
		})
	}

	code := `
(define Namespace "Namespace")
(define MasterCount 1)
(define WorkerCount 1)
(makeList MasterCount (machine (provider "Amazon") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (role "Worker")))
(label "Red"  (makeList 2 (docker "alpine")))
(label "Blue" (makeList 2 (docker "alpine")))`
	check(code, 2, 2, 0)

	code = `
(define Namespace "Namespace")
(define MasterCount 1)
(define WorkerCount 1)
(makeList MasterCount (machine (provider "Amazon") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (role "Worker")))
(label "Red"  (makeList 3 (docker "alpine")))`
	check(code, 3, 0, 0)

	code = `
(define Namespace "Namespace")
(define MasterCount 1)
(define WorkerCount 1)
(makeList MasterCount (machine (provider "Amazon") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (role "Worker")))
(label "Red"  (makeList 1 (docker "alpine")))
(label "Blue"  (makeList 5 (docker "alpine")))
(label "Yellow"  (makeList 10 (docker "alpine")))`
	check(code, 1, 5, 10)

	code = `
(define Namespace "Namespace")
(define MasterCount 1)
(define WorkerCount 1)
(makeList MasterCount (machine (provider "Amazon") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (role "Worker")))
(label "Red"  (makeList 30 (docker "alpine")))
(label "Blue"  (makeList 4 (docker "alpine")))
(label "Yellow"  (makeList 7 (docker "alpine")))`
	check(code, 30, 4, 7)

	code = `
(define Namespace "Namespace")
(define MasterCount 1)
(define WorkerCount 1)
(makeList MasterCount (machine (provider "Amazon") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (role "Worker")))`
	check(code, 0, 0, 0)
}

func TestEngine(t *testing.T) {
	spew := spew.NewDefaultConfig()
	spew.MaxDepth = 2

	conn := db.New()

	code := `
(define Namespace "Namespace")
(define MasterCount 2)
(define WorkerCount 3)
(makeList MasterCount (machine (provider "Amazon") (size "m4.large") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (size "m4.large") (role "Worker")))
(define AdminACL (list "1.2.3.4/32"))`

	UpdatePolicy(conn, prog(t, code))
	err := conn.Transact(func(view db.Database) error {
		cluster, err := view.GetCluster()
		masters := view.SelectFromMachine(func(m db.Machine) bool {
			return m.Role == db.Master
		})
		workers := view.SelectFromMachine(func(m db.Machine) bool {
			return m.Role == db.Worker
		})

		if err != nil {
			return err
		} else if len(cluster.ACLs) != 1 {
			return fmt.Errorf("bad cluster: %s", spew.Sdump(cluster))
		}

		if len(masters) != 2 {
			return fmt.Errorf("bad masters: %s", spew.Sdump(masters))
		}

		if len(workers) != 3 {
			return fmt.Errorf("bad workers: %s", spew.Sdump(workers))
		}
		return nil
	})
	if err != nil {
		t.Error(err.Error())
	}

	/* Verify master increase. */
	code = `
(define Namespace "Namespace")
(define MasterCount 4)
(define WorkerCount 5)
(makeList MasterCount (machine (provider "Amazon") (size "m4.large") (role "Master")))
(makeList WorkerCount (machine (provider "Amazon") (size "m4.large") (role "Worker")))
(define AdminACL (list "1.2.3.4/32"))`

	UpdatePolicy(conn, prog(t, code))
	err = conn.Transact(func(view db.Database) error {
		masters := view.SelectFromMachine(func(m db.Machine) bool {
			return m.Role == db.Master
		})
		workers := view.SelectFromMachine(func(m db.Machine) bool {
			return m.Role == db.Worker
		})

		if len(masters) != 4 {
			return fmt.Errorf("bad masters: %s", spew.Sdump(masters))
		}

		if len(workers) != 5 {
			return fmt.Errorf("bad workers: %s", spew.Sdump(workers))
		}
		return nil
	})
	if err != nil {
		t.Error(err.Error())
	}

	/* Verify that external writes stick around. */
	err = conn.Transact(func(view db.Database) error {
		masters := view.SelectFromMachine(func(m db.Machine) bool {
			return m.Role == db.Master
		})
		workers := view.SelectFromMachine(func(m db.Machine) bool {
			return m.Role == db.Worker
		})

		for _, master := range masters {
			master.CloudID = "1"
			master.PublicIP = "2"
			master.PrivateIP = "3"
			view.Commit(master)
		}

		for _, worker := range workers {
			worker.CloudID = "1"
			worker.PublicIP = "2"
			worker.PrivateIP = "3"
			view.Commit(worker)
		}

		return nil
	})

//.........这里部分代码省略.........

func TestSync(t *testing.T) {
	spew := spew.NewDefaultConfig()
	spew.MaxDepth = 2
	checkSync := func(clst cluster, provider db.Provider, expectedBoot []bootRequest,
		expectedStop []string) {
		clst.sync()
		providerInst := clst.providers[provider].(*fakeProvider)
		bootResult := providerInst.bootRequests
		stopResult := providerInst.stopRequests
		providerInst.clearLogs()
		if !emptySlices(bootResult, expectedBoot) &&
			!reflect.DeepEqual(bootResult, expectedBoot) {
			t.Error(spew.Sprintf(
				"booted wrong machines. Expected %s, got %s.",
				expectedBoot, bootResult))
		}
		if !emptySlices(stopResult, expectedStop) &&
			!reflect.DeepEqual(stopResult,
				expectedStop) {
			t.Error(spew.Sprintf(
				"stopped wrong machines. Expected %s, got %s.",
				expectedStop, stopResult))
		}
	}

	var noStops []string
	var noBoots []bootRequest
	amazonLargeBoot := bootRequest{size: "m4.large", cloudConfig: amazonCloudConfig}
	amazonXLargeBoot := bootRequest{size: "m4.xlarge", cloudConfig: amazonCloudConfig}
	vagrantLargeBoot := bootRequest{size: "vagrant.large",
		cloudConfig: vagrantCloudConfig}

	// Test initial boot
	clst := newTestCluster()
	clst.conn.Transact(func(view db.Database) error {
		m := view.InsertMachine()
		m.Role = db.Master
		m.Provider = FakeAmazon
		m.Size = "m4.large"
		view.Commit(m)

		return nil
	})
	checkSync(clst, FakeAmazon, []bootRequest{amazonLargeBoot}, noStops)

	// Test adding a machine with the same provider
	clst.conn.Transact(func(view db.Database) error {
		m := view.InsertMachine()
		m.Role = db.Master
		m.Provider = FakeAmazon
		m.Size = "m4.xlarge"
		view.Commit(m)

		return nil
	})
	checkSync(clst, FakeAmazon, []bootRequest{amazonXLargeBoot}, noStops)

	// Test adding a machine with a different provider
	clst.conn.Transact(func(view db.Database) error {
		m := view.InsertMachine()
		m.Role = db.Master
		m.Provider = FakeVagrant
		m.Size = "vagrant.large"
		view.Commit(m)

		return nil
	})
	checkSync(clst, FakeVagrant, []bootRequest{vagrantLargeBoot}, noStops)

	// Test removing a machine
	var toRemove db.Machine
	clst.conn.Transact(func(view db.Database) error {
		toRemove = view.SelectFromMachine(func(m db.Machine) bool {
			return m.Provider == FakeAmazon && m.Size == "m4.xlarge"
		})[0]
		view.Remove(toRemove)
		return nil
	})
	checkSync(clst, FakeAmazon, noBoots, []string{toRemove.CloudID})

	// Test removing and adding a machine
	clst.conn.Transact(func(view db.Database) error {
		toRemove = view.SelectFromMachine(func(m db.Machine) bool {
			return m.Provider == FakeAmazon && m.Size == "m4.large"
		})[0]
		view.Remove(toRemove)

		m := view.InsertMachine()
		m.Role = db.Worker
		m.Provider = FakeAmazon
		m.Size = "m4.xlarge"
		view.Commit(m)

		return nil
	})
	checkSync(clst, FakeAmazon, []bootRequest{amazonXLargeBoot},
		[]string{toRemove.CloudID})
}

func GenerateGo(t *tidm.TIDM) {
	cs := spew.NewDefaultConfig()
	cs.Indent = "    "
	fmt.Println("Dumping TIDM")
	cs.Dump(t)
}