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Improve Transaction: deduplicate quads, allow adding/removing a quad in the same tx

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This commit is contained in:
Quentin Machu 2015-10-06 15:21:33 -04:00
parent b74f8f1340
commit 45d96e14ec
3 changed files with 105 additions and 19 deletions
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62
graph/transaction_test.go Normal file
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@ -0,0 +1,62 @@
package graph
import (
"testing"
"github.com/google/cayley/quad"
)
func TestTransaction(t *testing.T) {
var tx *Transaction
// simples adds / removes
tx = NewTransaction()
tx.AddQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "F", Label: ""})
tx.AddQuad(quad.Quad{Subject: "F", Predicate: "follows", Object: "G", Label: ""})
tx.RemoveQuad(quad.Quad{Subject: "A", Predicate: "follows", Object: "Z", Label: ""})
if len(tx.Deltas) != 3 {
t.Errorf("Expected 3 Deltas, have %d delta(s)", len(tx.Deltas))
}
// add, remove -> nothing
tx = NewTransaction()
tx.AddQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
tx.RemoveQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
if len(tx.Deltas) != 0 {
t.Errorf("Expected [add, remove]->[], have %d Deltas", len(tx.Deltas))
}
// remove, add -> nothing
tx = NewTransaction()
tx.AddQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
tx.RemoveQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
if len(tx.Deltas) != 0 {
t.Errorf("Expected [add, remove]->[], have %d delta(s)", len(tx.Deltas))
}
// add x2 -> add x1
tx = NewTransaction()
tx.AddQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
tx.AddQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
if len(tx.Deltas) != 1 {
t.Errorf("Expected [add, add]->[add], have %d delta(s)", len(tx.Deltas))
}
// remove x2 -> remove x1
tx = NewTransaction()
tx.RemoveQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
tx.RemoveQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
if len(tx.Deltas) != 1 {
t.Errorf("Expected [remove, remove]->[remove], have %d delta(s)", len(tx.Deltas))
}
// add, remove x2 -> remove x1
tx = NewTransaction()
tx.AddQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
tx.RemoveQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
tx.RemoveQuad(quad.Quad{Subject: "E", Predicate: "follows", Object: "G", Label: ""})
if len(tx.Deltas) != 1 {
t.Errorf("Expected [add, remove, remove]->[remove], have %d delta(s)", len(tx.Deltas))
}
}