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How to use runNode method of internal Package

Best Ginkgo code snippet using internal.runNode

decommission.go

Source:decommission.go

...285	}286	// Partially decommission then recommission a random node, from another287	// random node. Run a couple of status checks while doing so.288	{289		targetNode, runNode := getRandNode(), getRandNode()290		t.l.Printf("partially decommissioning n%d from n%d\n", targetNode, runNode)291		o, err := h.decommission(ctx, c.Node(targetNode), runNode,292			"--wait=none", "--format=csv")293		if err != nil {294			t.Fatalf("decommission failed: %v", err)295		}296		exp := [][]string{297			decommissionHeader,298			{strconv.Itoa(targetNode), "true", `\d+`, "true", "decommissioning", "false"},299		}300		if err := h.matchCSV(o, exp); err != nil {301			t.Fatal(err)302		}303		// Check that `node status` reflects an ongoing decommissioning status304		// for the second node.305		{306			runNode = getRandNode()307			t.l.Printf("checking that `node status` (from n%d) shows n%d as decommissioning\n",308				runNode, targetNode)309			o, err := execCLI(ctx, t, c, runNode, "node", "status", "--format=csv", "--decommission")310			if err != nil {311				t.Fatalf("node-status failed: %v", err)312			}313			numCols := h.getCsvNumCols(o)314			exp := h.expectCell(targetNode-1, /* node IDs are 1-indexed */315				statusHeaderMembershipColumnIdx, `decommissioning`, c.spec.NodeCount, numCols)316			if err := h.matchCSV(o, exp); err != nil {317				t.Fatal(err)318			}319		}320		// Recommission the target node, cancel the in-flight decommissioning321		// process.322		{323			runNode = getRandNode()324			t.l.Printf("recommissioning n%d (from n%d)\n", targetNode, runNode)325			if _, err := h.recommission(ctx, c.Node(targetNode), runNode); err != nil {326				t.Fatalf("recommission failed: %v", err)327			}328		}329		// Check that `node status` now reflects a 'active' status for the330		// target node.331		{332			runNode = getRandNode()333			t.l.Printf("checking that `node status` (from n%d) shows n%d as active\n",334				targetNode, runNode)335			o, err := execCLI(ctx, t, c, runNode, "node", "status", "--format=csv", "--decommission")336			if err != nil {337				t.Fatalf("node-status failed: %v", err)338			}339			numCols := h.getCsvNumCols(o)340			exp := h.expectCell(targetNode-1, /* node IDs are 1-indexed */341				statusHeaderMembershipColumnIdx, `active`, c.spec.NodeCount, numCols)342			if err := h.matchCSV(o, exp); err != nil {343				t.Fatal(err)344			}345		}346	}347	// Check to see that operators aren't able to decommission into348	// availability. We'll undo the attempted decommissioning event by349	// recommissioning the targeted nodes.350	{351		// Attempt to decommission all the nodes.352		{353			runNode := getRandNode()354			t.l.Printf("attempting to decommission all nodes from n%d\n", runNode)355			o, err := h.decommission(ctx, c.All(), runNode,356				"--wait=none", "--format=csv")357			if err != nil {358				t.Fatalf("decommission failed: %v", err)359			}360			exp := [][]string{decommissionHeader}361			for i := 1; i <= c.spec.NodeCount; i++ {362				rowRegex := []string{strconv.Itoa(i), "true", `\d+`, "true", "decommissioning", "false"}363				exp = append(exp, rowRegex)364			}365			if err := h.matchCSV(o, exp); err != nil {366				t.Fatalf("decommission failed: %v", err)367			}368		}369		// Check that `node status` reflects an ongoing decommissioning status for370		// all nodes.371		{372			runNode := getRandNode()373			t.l.Printf("checking that `node status` (from n%d) shows all nodes as decommissioning\n",374				runNode)375			o, err := execCLI(ctx, t, c, runNode, "node", "status", "--format=csv", "--decommission")376			if err != nil {377				t.Fatalf("node-status failed: %v", err)378			}379			numCols := h.getCsvNumCols(o)380			var colRegex []string381			for i := 1; i <= c.spec.NodeCount; i++ {382				colRegex = append(colRegex, `decommissioning`)383			}384			exp := h.expectColumn(statusHeaderMembershipColumnIdx, colRegex, c.spec.NodeCount, numCols)385			if err := h.matchCSV(o, exp); err != nil {386				t.Fatal(err)387			}388		}389		// Check that we can still do stuff, creating a database should be good390		// enough.391		{392			runNode := getRandNode()393			t.l.Printf("checking that we're able to create a database (from n%d)\n", runNode)394			db := c.Conn(ctx, runNode)395			defer db.Close()396			if _, err := db.Exec(`create database still_working;`); err != nil {397				t.Fatal(err)398			}399		}400		// Cancel in-flight decommissioning process of all nodes.401		{402			runNode := getRandNode()403			t.l.Printf("recommissioning all nodes (from n%d)\n", runNode)404			if _, err := h.recommission(ctx, c.All(), runNode); err != nil {405				t.Fatalf("recommission failed: %v", err)406			}407		}408		// Check that `node status` now reflects an 'active' status for all409		// nodes.410		{411			runNode := getRandNode()412			t.l.Printf("checking that `node status` (from n%d) shows all nodes as active\n",413				runNode)414			o, err := execCLI(ctx, t, c, runNode, "node", "status", "--format=csv", "--decommission")415			if err != nil {416				t.Fatalf("node-status failed: %v", err)417			}418			numCols := h.getCsvNumCols(o)419			var colRegex []string420			for i := 1; i <= c.spec.NodeCount; i++ {421				colRegex = append(colRegex, `active`)422			}423			exp := h.expectColumn(statusHeaderMembershipColumnIdx, colRegex, c.spec.NodeCount, numCols)424			if err := h.matchCSV(o, exp); err != nil {425				t.Fatal(err)426			}427		}428	}429	// Fully recommission two random nodes, from a random node, randomly choosing430	// between using --wait={all,none}. We pin these two nodes to not re-use431	// them for the block after, as they will have been fully decommissioned and432	// by definition, non-operational.433	decommissionedNodeA := getRandNode()434	decommissionedNodeB := getRandNodeOtherThan(decommissionedNodeA)435	{436		targetNodeA, targetNodeB := decommissionedNodeA, decommissionedNodeB437		if targetNodeB < targetNodeA {438			targetNodeB, targetNodeA = targetNodeA, targetNodeB439		}440		runNode := getRandNode()441		waitStrategy := "all" // Blocking decommission.442		if i := rand.Intn(2); i == 0 {443			waitStrategy = "none" // Polling decommission.444		}445		t.l.Printf("fully decommissioning [n%d,n%d] from n%d, using --wait=%s\n",446			targetNodeA, targetNodeB, runNode, waitStrategy)447		// When using --wait=none, we poll the decommission status.448		maxAttempts := 50449		if waitStrategy == "all" {450			// --wait=all is a one shot attempt at decommissioning, that polls451			// internally.452			maxAttempts = 1453		}454		// Decommission two nodes.455		if err := retry.WithMaxAttempts(ctx, retryOpts, maxAttempts, func() error {456			o, err := h.decommission(ctx, c.Nodes(targetNodeA, targetNodeB), runNode,457				fmt.Sprintf("--wait=%s", waitStrategy), "--format=csv")458			if err != nil {459				t.Fatalf("decommission failed: %v", err)460			}461			exp := [][]string{462				decommissionHeader,463				{strconv.Itoa(targetNodeA), "true", "0", "true", "decommissioned", "false"},464				{strconv.Itoa(targetNodeB), "true", "0", "true", "decommissioned", "false"},465				decommissionFooter,466			}467			return h.matchCSV(o, exp)468		}); err != nil {469			t.Fatal(err)470		}471		// Check that even though two nodes are decommissioned, we still see472		// them (since they remain live) in `node ls`.473		{474			runNode = getRandNode()475			t.l.Printf("checking that `node ls` (from n%d) shows all nodes\n", runNode)476			o, err := execCLI(ctx, t, c, runNode, "node", "ls", "--format=csv")477			if err != nil {478				t.Fatalf("node-ls failed: %v", err)479			}480			exp := [][]string{{"id"}}481			for i := 1; i <= c.spec.NodeCount; i++ {482				exp = append(exp, []string{strconv.Itoa(i)})483			}484			if err := h.matchCSV(o, exp); err != nil {485				t.Fatal(err)486			}487		}488		// Ditto for `node status`.489		{490			runNode = getRandNode()491			t.l.Printf("checking that `node status` (from n%d) shows all nodes\n", runNode)492			o, err := execCLI(ctx, t, c, runNode, "node", "status", "--format=csv")493			if err != nil {494				t.Fatalf("node-status failed: %v", err)495			}496			numCols := h.getCsvNumCols(o)497			colRegex := []string{}498			for i := 1; i <= c.spec.NodeCount; i++ {499				colRegex = append(colRegex, strconv.Itoa(i))500			}501			exp := h.expectIDsInStatusOut(colRegex, numCols)502			if err := h.matchCSV(o, exp); err != nil {503				t.Fatal(err)504			}505		}506		// Attempt to recommission the fully decommissioned nodes (expecting it507		// to fail).508		{509			runNode = getRandNode()510			t.l.Printf("expected to fail: recommissioning [n%d,n%d] (from n%d)\n",511				targetNodeA, targetNodeB, runNode)512			if _, err := h.recommission(ctx, c.Nodes(targetNodeA, targetNodeB), runNode); err == nil {513				t.Fatal("expected recommission to fail")514			}515		}516		// Decommissioning the same nodes again should be a no-op. We do it from517		// a random node.518		{519			runNode = getRandNode()520			t.l.Printf("checking that decommissioning [n%d,n%d] (from n%d) is a no-op\n",521				targetNodeA, targetNodeB, runNode)522			o, err := h.decommission(ctx, c.Nodes(targetNodeA, targetNodeB), runNode,523				"--wait=all", "--format=csv")524			if err != nil {525				t.Fatalf("decommission failed: %v", err)526			}527			exp := [][]string{528				decommissionHeader,529				{strconv.Itoa(targetNodeA), "true", "0", "true", "decommissioned", "false"},530				{strconv.Itoa(targetNodeB), "true", "0", "true", "decommissioned", "false"},531				decommissionFooter,532			}533			if err := h.matchCSV(o, exp); err != nil {534				t.Fatal(err)535			}536		}537		// We restart the nodes and attempt to recommission (should still fail).538		{539			runNode = getRandNode()540			t.l.Printf("expected to fail: restarting [n%d,n%d] and attempting to recommission through n%d\n",541				targetNodeA, targetNodeB, runNode)542			c.Stop(ctx, c.Nodes(targetNodeA, targetNodeB))543			c.Start(ctx, t, c.Nodes(targetNodeA, targetNodeB), args)544			if _, err := h.recommission(ctx, c.Nodes(targetNodeA, targetNodeB), runNode); err == nil {545				t.Fatalf("expected recommission to fail")546			}547		}548	}549	// Decommission a downed node (random selected), randomly choosing between550	// bringing the node back to life or leaving it permanently dead.551	//552	// TODO(irfansharif): We could pull merge this "deadness" check into the553	// previous block, when fully decommissioning multiple nodes, to reduce the554	// total number of nodes needed in the cluster.555	{556		restartDownedNode := false557		if i := rand.Intn(2); i == 0 {558			restartDownedNode = true559		}560		if !restartDownedNode {561			// We want to test decommissioning a truly dead node. Make sure we562			// don't waste too much time waiting for the node to be recognized563			// as dead. Note that we don't want to set this number too low or564			// everything will seem dead to the allocator at all times, so565			// nothing will ever happen.566			func() {567				db := c.Conn(ctx, 1)568				defer db.Close()569				const stmt = "SET CLUSTER SETTING server.time_until_store_dead = '1m15s'"570				if _, err := db.ExecContext(ctx, stmt); err != nil {571					t.Fatal(err)572				}573			}()574		}575		targetNode := getRandNodeOtherThan(decommissionedNodeA, decommissionedNodeB)576		t.l.Printf("intentionally killing n%d to later decommission it when down\n", targetNode)577		c.Stop(ctx, c.Node(targetNode))578		runNode := getRandNodeOtherThan(targetNode)579		t.l.Printf("decommissioning n%d (from n%d) in absentia\n", targetNode, runNode)580		if _, err := h.decommission(ctx, c.Node(targetNode), runNode,581			"--wait=all", "--format=csv"); err != nil {582			t.Fatalf("decommission failed: %v", err)583		}584		if restartDownedNode {585			t.l.Printf("restarting n%d for verification\n", targetNode)586			// Bring targetNode it back up to verify that its replicas still get587			// removed.588			c.Start(ctx, t, c.Node(targetNode), args)589		}590		// Run decommission a second time to wait until the replicas have591		// all been GC'ed. Note that we specify "all" because even though592		// the target node is now running, it may not be live by the time593		// the command runs.594		o, err := h.decommission(ctx, c.Node(targetNode), runNode,595			"--wait=all", "--format=csv")596		if err != nil {597			t.Fatalf("decommission failed: %v", err)598		}599		exp := [][]string{600			decommissionHeader,601			{strconv.Itoa(targetNode), "true|false", "0", "true", "decommissioned", "false"},602			decommissionFooter,603		}604		if err := h.matchCSV(o, exp); err != nil {605			t.Fatal(err)606		}607		if !restartDownedNode {608			// Check that (at least after a bit) the node disappears from `node609			// ls` because it is decommissioned and not live.610			if err := retry.WithMaxAttempts(ctx, retryOpts, 50, func() error {611				runNode := getRandNodeOtherThan(targetNode)612				o, err := execCLI(ctx, t, c, runNode, "node", "ls", "--format=csv")613				if err != nil {614					t.Fatalf("node-ls failed: %v", err)615				}616				var exp [][]string617				for i := 1; i <= c.spec.NodeCount; i++ {618					exp = append(exp, []string{fmt.Sprintf("[^%d]", targetNode)})619				}620				return h.matchCSV(o, exp)621			}); err != nil {622				t.Fatal(err)623			}624			// Ditto for `node status`625			if err := retry.WithMaxAttempts(ctx, retryOpts, 50, func() error {626				runNode := getRandNodeOtherThan(targetNode)627				o, err := execCLI(ctx, t, c, runNode, "node", "status", "--format=csv")628				if err != nil {629					t.Fatalf("node-status failed: %v", err)630				}631				numCols := h.getCsvNumCols(o)632				var expC []string633				// We're checking for n-1 rows, where n is the node count.634				for i := 1; i < c.spec.NodeCount; i++ {635					expC = append(expC, fmt.Sprintf("[^%d].*", targetNode))636				}637				exp := h.expectIDsInStatusOut(expC, numCols)638				return h.matchCSV(o, exp)639			}); err != nil {640				t.Fatal(err)641			}642		}643		{644			t.l.Printf("wiping n%d and adding it back to the cluster as a new node\n", targetNode)645			c.Stop(ctx, c.Node(targetNode))646			c.Wipe(ctx, c.Node(targetNode))647			joinNode := targetNode%c.spec.NodeCount + 1648			joinAddr := c.InternalAddr(ctx, c.Node(joinNode))[0]649			c.Start(ctx, t, c.Node(targetNode), startArgs(650				fmt.Sprintf("-a=--join %s", joinAddr),651			))652		}653		if err := retry.WithMaxAttempts(ctx, retryOpts, 50, func() error {654			o, err := execCLI(ctx, t, c, getRandNode(), "node", "status", "--format=csv")655			if err != nil {656				t.Fatalf("node-status failed: %v", err)657			}658			numCols := h.getCsvNumCols(o)659			var expC []string660			for i := 1; i <= c.spec.NodeCount; i++ {661				expC = append(expC, fmt.Sprintf("[^%d].*", targetNode))662			}663			exp := h.expectIDsInStatusOut(expC, numCols)664			return h.matchCSV(o, exp)665		}); err != nil {666			t.Fatal(err)667		}668	}669	// We'll verify the set of events, in order, we expect to get posted to670	// system.eventlog.671	if err := retry.ForDuration(time.Minute, func() error {672		// Verify the event log has recorded exactly one decommissioned or673		// recommissioned event for each membership operation.674		db := c.Conn(ctx, 1)675		defer db.Close()676		rows, err := db.Query(`677			SELECT "eventType" FROM system.eventlog WHERE "eventType" IN ($1, $2, $3) ORDER BY timestamp678			`, "node_decommissioned", "node_decommissioning", "node_recommissioned",679		)680		if err != nil {681			t.l.Printf("retrying: %v\n", err)682			return err683		}684		defer rows.Close()685		matrix, err := sqlutils.RowsToStrMatrix(rows)686		if err != nil {687			return err688		}689		expMatrix := [][]string{690			// Partial decommission attempt of a single node.691			{"node_decommissioning"},692			{"node_recommissioned"},693			// Cluster wide decommissioning attempt.694			{"node_decommissioning"},695			{"node_decommissioning"},696			{"node_decommissioning"},697			{"node_decommissioning"},698			{"node_decommissioning"},699			{"node_decommissioning"},700			// Cluster wide recommissioning, to undo previous decommissioning attempt.701			{"node_recommissioned"},702			{"node_recommissioned"},703			{"node_recommissioned"},704			{"node_recommissioned"},705			{"node_recommissioned"},706			{"node_recommissioned"},707			// Full decommission of two nodes.708			{"node_decommissioning"},709			{"node_decommissioning"},710			{"node_decommissioned"},711			{"node_decommissioned"},712			// Full decommission of a single node.713			{"node_decommissioning"},714			{"node_decommissioned"},715		}716		if !reflect.DeepEqual(matrix, expMatrix) {717			t.Fatalf("unexpected diff(matrix, expMatrix):\n%s\n%s\nvs.\n%s", pretty.Diff(matrix, expMatrix), matrix, expMatrix)718		}719		return nil720	}); err != nil {721		t.Fatal(err)722	}723}724// Header from the output of `cockroach node decommission`.725var decommissionHeader = []string{726	"id", "is_live", "replicas", "is_decommissioning", "membership", "is_draining",727}728// Footer from the output of `cockroach node decommission`, after successful729// decommission.730var decommissionFooter = []string{731	"No more data reported on target nodes. " +732		"Please verify cluster health before removing the nodes.",733}734// Header from the output of `cockroach node status`.735var statusHeader = []string{736	"id", "address", "sql_address", "build", "started_at", "updated_at", "locality", "is_available", "is_live",737}738// Header from the output of `cockroach node status --decommission`.739var statusHeaderWithDecommission = []string{740	"id", "address", "sql_address", "build", "started_at", "updated_at", "locality", "is_available", "is_live",741	"gossiped_replicas", "is_decommissioning", "membership", "is_draining",742}743// Index of `membership` column in statusHeaderWithDecommission744const statusHeaderMembershipColumnIdx = 11745type decommTestHelper struct {746	t *test747	c *cluster748}749// decommission decommissions the given targetNodes, running the process750// through the specified runNode.751func (h *decommTestHelper) decommission(752	ctx context.Context, targetNodes nodeListOption, runNode int, verbs ...string,753) (string, error) {754	args := []string{"node", "decommission"}755	args = append(args, verbs...)756	if len(targetNodes) == 1 && targetNodes[0] == runNode {757		args = append(args, "--self")758	} else {759		for _, target := range targetNodes {760			args = append(args, strconv.Itoa(target))761		}762	}763	return execCLI(ctx, h.t, h.c, runNode, args...)764}765// recommission recommissions the given targetNodes, running the process766// through the specified runNode.767func (h *decommTestHelper) recommission(768	ctx context.Context, targetNodes nodeListOption, runNode int, verbs ...string,769) (string, error) {770	args := []string{"node", "recommission"}771	args = append(args, verbs...)772	if len(targetNodes) == 1 && targetNodes[0] == runNode {773		args = append(args, "--self")774	} else {775		for _, target := range targetNodes {776			args = append(args, strconv.Itoa(target))777		}778	}779	return execCLI(ctx, h.t, h.c, runNode, args...)780}781// getCsvNumCols returns the number of columns in the given csv string.782func (h *decommTestHelper) getCsvNumCols(csvStr string) (cols int) {783	reader := csv.NewReader(strings.NewReader(csvStr))784	records, err := reader.Read()785	if err != nil {786		h.t.Fatal(errors.Errorf("error reading csv input: \n %v\n errors:%s", csvStr, err))787	}788	return len(records)789}790// matchCSV matches a multi-line csv string with the provided regex791// (matchColRow[i][j] will be matched against the i-th line, j-th column).792func (h *decommTestHelper) matchCSV(csvStr string, matchColRow [][]string) (err error) {793	defer func() {794		if err != nil {795			err = errors.Errorf("csv input:\n%v\nexpected:\n%s\nerrors:%s",796				csvStr, pretty.Sprint(matchColRow), err)797		}798	}()799	reader := csv.NewReader(strings.NewReader(csvStr))800	reader.FieldsPerRecord = -1801	records, err := reader.ReadAll()802	if err != nil {803		return err804	}805	lr, lm := len(records), len(matchColRow)806	if lr < lm {807		return errors.Errorf("csv has %d rows, but expected at least %d", lr, lm)808	}809	// Compare only the last len(matchColRow) records. That is, if we want to810	// match 4 rows and we have 100 records, we only really compare811	// records[96:], that is, the last four rows.812	records = records[lr-lm:]813	for i := range records {814		if lr, lm := len(records[i]), len(matchColRow[i]); lr != lm {815			return errors.Errorf("row #%d: csv has %d columns, but expected %d", i+1, lr, lm)816		}817		for j := range records[i] {818			pat, str := matchColRow[i][j], records[i][j]819			re := regexp.MustCompile(pat)820			if !re.MatchString(str) {821				err = errors.Errorf("%v\nrow #%d, col #%d: found %q which does not match %q",822					err, i+1, j+1, str, pat)823			}824		}825	}826	return err827}828// expectColumn constructs a matching regex for a given column (identified829// by its column index).830func (h *decommTestHelper) expectColumn(831	column int, columnRegex []string, numRows, numCols int,832) [][]string {833	var res [][]string834	for r := 0; r < numRows; r++ {835		build := []string{}836		for c := 0; c < numCols; c++ {837			if c == column {838				build = append(build, columnRegex[r])839			} else {840				build = append(build, `.*`)841			}842		}843		res = append(res, build)844	}845	return res846}847// expectCell constructs a matching regex for a given cell (identified by848// its row and column indexes).849func (h *decommTestHelper) expectCell(850	row, column int, regex string, numRows, numCols int,851) [][]string {852	var res [][]string853	for r := 0; r < numRows; r++ {854		build := []string{}855		for c := 0; c < numCols; c++ {856			if r == row && c == column {857				build = append(build, regex)858			} else {859				build = append(build, `.*`)860			}861		}862		res = append(res, build)863	}864	return res865}866// expectIDsInStatusOut constructs a matching regex for output of `cockroach867// node status`. It matches against the `id` column in the output generated868// with and without the `--decommission` flag.869func (h *decommTestHelper) expectIDsInStatusOut(ids []string, numCols int) [][]string {870	var res [][]string871	switch numCols {872	case len(statusHeader):873		res = append(res, statusHeader)874	case len(statusHeaderWithDecommission):875		res = append(res, statusHeaderWithDecommission)876	default:877		h.t.Fatalf(878			"Expected status output numCols to be one of %d or %d, found %d",879			len(statusHeader),880			len(statusHeaderWithDecommission),881			numCols,882		)883	}884	for _, id := range ids {885		build := []string{id}886		for i := 0; i < numCols-1; i++ {887			build = append(build, `.*`)888		}889		res = append(res, build)890	}891	return res892}893func execCLI(894	ctx context.Context, t *test, c *cluster, runNode int, extraArgs ...string,895) (string, error) {896	args := []string{"./cockroach"}897	args = append(args, extraArgs...)898	args = append(args, "--insecure")899	args = append(args, fmt.Sprintf("--port={pgport:%d}", runNode))900	buf, err := c.RunWithBuffer(ctx, t.l, c.Node(runNode), args...)901	t.l.Printf("%s\n", buf)902	return string(buf), err903}...

runNode

Using AI Code Generation

1public class Main {2    public static void main(String[] args) {3        Node node = new Node();4        node.runNode();5    }6}7class Node {8    void runNode() {9        System.out.println("Node is running");10    }11}12class Node {13    void runNode() {14        System.out.println("Node is running");15    }16}17class Node {18    void runNode() {19        System.out.println("Node is running");20    }21}22class Node {23    void runNode() {24        System.out.println("Node is running");25    }26}27class Node {28    void runNode() {29        System.out.println("Node is running");30    }31}32class Node {33    void runNode() {34        System.out.println("Node is running");35    }36}37class Node {38    void runNode() {39        System.out.println("Node is running");40    }41}42class Node {43    void runNode() {44        System.out.println("Node is running");45    }46}47class Node {48    void runNode() {49        System.out.println("Node is running");50    }51}52class Node {53    void runNode() {54        System.out.println("Node is running");55    }56}57class Node {58    void runNode() {59        System.out.println("Node is running");60    }61}62class Node {63    void runNode() {64        System.out.println("Node is running");65    }66}67class Node {68    void runNode() {69        System.out.println("Node is running");70    }71}72class Node {73    void runNode() {74        System.out.println("Node is running");75    }76}

runNode

Using AI Code Generation

1import "fmt"2func main() {3    n := &Node{value: 3}4    n.runNode()5}6import "fmt"7func main() {8    n := &Node{value: 3}9    n.runNode()10}11import "fmt"12func main() {13    n := &Node{value: 3}14    n.runNode()15}16import "fmt"17func main() {18    n := &Node{value: 3}19    n.runNode()20}21import "fmt"22func main() {23    n := &Node{value: 3}24    n.runNode()25}26import "fmt"27func main() {28    n := &Node{value: 3}29    n.runNode()30}31import "fmt"32func main() {33    n := &Node{value: 3}34    n.runNode()35}36import "fmt"37func main() {38    n := &Node{value: 3}39    n.runNode()40}41import "fmt"42func main() {43    n := &Node{value: 3}44    n.runNode()45}46import "fmt"47func main() {48    n := &Node{value: 3}49    n.runNode()50}51import "fmt"52func main() {53    n := &Node{value: 3}54    n.runNode()55}

runNode

Using AI Code Generation

1import (2func main() {3	vm := otto.New()4	vm.Run(`5		var internal = {6			runNode: function(node) {7				console.log(node);8			}9		};10	vm.Run(`11		internal.runNode("test");12}

runNode

Using AI Code Generation

1import "internal"2func main() {3 internal.RunNode()4}5func RunNode() {6}

runNode

Using AI Code Generation

1import (2func main() {3    node := Node.Node{Value: 3}4    node.Left = &Node.Node{}5    node.Right = &Node.Node{5, nil, nil}6    node.Right.Left = new(Node.Node)7    node.Left.Right = Node.CreateNode(2)8    nodes := []Node.Node{9        {Value: 3},10        {},11        {6, nil, &node},12    }13    fmt.Println(nodes)14    node.Traverse()15}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.