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package system
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import (
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"testing"
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)
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// Test_JoinLeaderNode tests a join operation between a leader and a new node.
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func Test_JoinLeaderNode(t *testing.T) {
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leader := mustNewLeaderNode()
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defer leader.Deprovision()
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node := mustNewNode(false)
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defer node.Deprovision()
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if err := node.Join(leader); err != nil {
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t.Fatalf("node failed to join leader: %s", err.Error())
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}
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_, err := node.WaitForLeader()
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if err != nil {
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t.Fatalf("failed waiting for leader: %s", err.Error())
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}
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}
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// Test_MultiNodeCluster tests formation of a 3-node cluster, and its operation.
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func Test_MultiNodeCluster(t *testing.T) {
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node1 := mustNewLeaderNode()
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defer node1.Deprovision()
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node2 := mustNewNode(false)
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defer node2.Deprovision()
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if err := node2.Join(node1); err != nil {
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t.Fatalf("node failed to join leader: %s", err.Error())
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}
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_, err := node2.WaitForLeader()
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if err != nil {
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t.Fatalf("failed waiting for leader: %s", err.Error())
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}
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// Get the new leader, in case it changed.
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c := Cluster{node1, node2}
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leader, err := c.Leader()
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if err != nil {
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t.Fatalf("failed to find cluster leader: %s", err.Error())
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}
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node3 := mustNewNode(false)
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defer node3.Deprovision()
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if err := node3.Join(leader); err != nil {
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t.Fatalf("node failed to join leader: %s", err.Error())
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}
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node3.WaitForLeader()
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_, err = node3.WaitForLeader()
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if err != nil {
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t.Fatalf("failed waiting for leader: %s", err.Error())
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}
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// Get the new leader, in case it changed.
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c = Cluster{node1, node2, node3}
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leader, err = c.Leader()
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if err != nil {
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t.Fatalf("failed to find cluster leader: %s", err.Error())
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}
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// Run queries against cluster.
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tests := []struct {
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stmt string
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expected string
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execute bool
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}{
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{
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stmt: `CREATE TABLE foo (id integer not null primary key, name text)`,
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expected: `{"results":[{}]}`,
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execute: true,
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},
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{
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stmt: `INSERT INTO foo(name) VALUES("fiona")`,
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expected: `{"results":[{"last_insert_id":1,"rows_affected":1}]}`,
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execute: true,
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},
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{
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stmt: `SELECT * FROM foo`,
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expected: `{"results":[{"columns":["id","name"],"types":["integer","text"],"values":[[1,"fiona"]]}]}`,
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execute: false,
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},
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}
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for i, tt := range tests {
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var r string
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var err error
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if tt.execute {
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r, err = leader.Execute(tt.stmt)
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} else {
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r, err = leader.Query(tt.stmt)
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}
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if err != nil {
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t.Fatalf(`test %d failed "%s": %s`, i, tt.stmt, err.Error())
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}
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if r != tt.expected {
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t.Fatalf(`test %d received wrong result "%s" got: %s exp: %s`, i, tt.stmt, r, tt.expected)
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}
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}
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// Kill the leader and wait for the new leader.
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leader.Deprovision()
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c.RemoveNode(leader)
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leader, err = c.WaitForNewLeader(leader)
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if err != nil {
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t.Fatalf("failed to find new cluster leader after killing leader: %s", err.Error())
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}
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// Run queries against 2-node cluster.
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tests = []struct {
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stmt string
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expected string
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execute bool
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}{
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{
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stmt: `CREATE TABLE foo (id integer not null primary key, name text)`,
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expected: `{"results":[{"error":"table foo already exists"}]}`,
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execute: true,
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},
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{
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stmt: `INSERT INTO foo(name) VALUES("sinead")`,
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expected: `{"results":[{"last_insert_id":2,"rows_affected":1}]}`,
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execute: true,
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},
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{
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stmt: `SELECT * FROM foo`,
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expected: `{"results":[{"columns":["id","name"],"types":["integer","text"],"values":[[1,"fiona"],[2,"sinead"]]}]}`,
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execute: false,
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},
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}
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for i, tt := range tests {
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var r string
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var err error
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if tt.execute {
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r, err = leader.Execute(tt.stmt)
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} else {
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r, err = leader.Query(tt.stmt)
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}
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if err != nil {
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t.Fatalf(`test %d failed "%s": %s`, i, tt.stmt, err.Error())
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}
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if r != tt.expected {
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t.Fatalf(`test %d received wrong result "%s" got: %s exp: %s`, i, tt.stmt, r, tt.expected)
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}
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}
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}
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