45 lines
972 B
Go
45 lines
972 B
Go
package inventory
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import (
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"testing"
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"time"
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)
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// Composing and sending one node's declaration is serialised: a second holder waits for the first.
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func TestHoldingANodeMakesTheNextHolderWait(t *testing.T) {
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inv := fresh(t)
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ctx := t.Context()
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release, err := inv.HoldNodes(ctx, []string{"anchor", "laptop"})
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if err != nil {
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t.Fatal(err)
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}
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got := make(chan func(), 1)
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go func() {
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second, err := inv.HoldNodes(ctx, []string{"laptop"})
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if err != nil {
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t.Error(err)
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got <- func() {}
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return
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}
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got <- second
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}()
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select {
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case <-got:
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t.Fatal("a node held by one caller was held by another at the same time")
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case <-time.After(300 * time.Millisecond):
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}
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// Another node is not held up.
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other, err := inv.HoldNodes(ctx, []string{"joiner"})
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if err != nil {
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t.Fatal(err)
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}
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other()
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release()
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select {
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case second := <-got:
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second()
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case <-time.After(5 * time.Second):
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t.Fatal("releasing the node did not let the next holder in")
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}
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}
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