Index explanation selections once per query
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@@ -24,11 +24,18 @@ func TestTierHistoryRecordsEachContributionOnce(t *testing.T) {
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if len(history) != 3 {
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t.Fatalf("history has %d records; want the three independent contributions", len(history))
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}
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explanation, found := result.Explain(configkit.Keys("x"))
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if !found || len(explanation.History) != len(history) {
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t.Fatal("explanation lost ordered tier contributions")
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}
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for index, sourceID := range []string{"source-2", "source-3", "source-1"} {
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change := history[index]
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if len(change.Origin.Locations) != 1 || change.Origin.Locations[0].SourceID != sourceID {
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t.Fatalf("contribution %d has origin %#v", index, change.Origin)
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}
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if len(explanation.History[index].Origin.Locations) != 1 || explanation.History[index].Origin.Locations[0] != change.Origin.Locations[0] {
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t.Fatalf("explanation contribution %d has a different source origin", index)
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}
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if index == 0 {
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if len(change.Previous) != 0 {
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t.Fatal("first source contribution has a previous origin")
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