jschoubben
0e4feb0d3a
Once chain_moved records the kind, Assign, Unassign and Assigned write and read the keys <node>.<module>, and every join of the store that read assignments is made from the bucket: where a module runs, what is behind, what a machine awaits, a given value due for replacement, taking a module, and whether a module may be forgotten (refused while a standing assignment names it). An unassignment ends the key with a marker and keeps its earlier values, as it removed the row; no ended or pending mark is written yet. The generation rises with each change, and a seat held by an assignment goes with it: the foreign key from seat_holding is dropped by migration 0104 and the controller says both. The provisioner's plan is kept in the values by a pass of the tick that writes that one field by compare-and-set; the assignment-changed event is said from what the bucket holds, whoever wrote it. The start moves the rows with what each machine was last sent, keeping a plan the mirror put in a value.
46 lines
1.5 KiB
Go
46 lines
1.5 KiB
Go
package inventory
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import (
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"strings"
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"testing"
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)
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// **The move of the chain has a switch, made by the last migration and written by no migration** (ADR 0408 §8, issue
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// 1089): migration 0104 makes the one-row table chain_moved, and does not drop a table of the chain, which a later
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// delivery does once the move is read back.
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func TestMigration0104MakesTheSwitchOfTheChainsMoveAndNothingElse(t *testing.T) {
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migrations, err := Migrations()
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if err != nil {
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t.Fatal(err)
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}
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var found bool
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for _, m := range migrations {
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if m.Number != 104 {
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continue
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}
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found = true
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sql := strings.ToLower(m.SQL)
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if !strings.Contains(sql, "create table chain_moved") || !strings.Contains(sql, "check (only_one)") {
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t.Errorf("migration 0104 does not make the one-row chain_moved:\n%s", m.SQL)
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}
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for _, line := range strings.Split(sql, "\n") {
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if strings.HasPrefix(strings.TrimSpace(line), "--") {
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continue
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}
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for _, verb := range []string{"drop table", "insert ", "delete ", "update "} {
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if strings.Contains(line, verb) {
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t.Errorf("migration 0104 does more than make the switch: %q", line)
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}
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}
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// The one other change: a seat's holder is no longer a foreign key to the assignment (issue 1093); the tables of
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// the chain are dropped by a later migration (issue 1096).
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if strings.Contains(line, "alter ") && !strings.Contains(line, "alter table seat_holding drop constraint") {
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t.Errorf("migration 0104 alters more than the seat holdings' foreign key: %q", line)
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}
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}
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}
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if !found {
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t.Fatal("no migration 0104")
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}
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}
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