Complete historical inventory and query services

internal/engine/history_resolution_test.go

@@ -92,3 +92,59 @@ func TestHistoryResolutionRetainsOriginalShapeAttributionBehindReplayGroup(t *te
 		t.Fatal("original resolution subtree sensitivity was omitted from observations")
 	}
 }
+
+func TestMetadataFinalizationRegistersResolutionInventoryAndRoots(t *testing.T) {
+	t.Parallel()
+
+	beforeShape := &document.Node{Kind: document.Mapping, Mapping: []document.Entry{{
+		Key: "0", Value: &document.Node{Kind: document.String, Text: "old"},
+	}}}
+	afterShape := &document.Node{Kind: document.Sequence, Sequence: []*document.Node{{
+		Kind: document.String, Text: "new", Sensitive: true,
+	}}}
+	before := &document.Node{Kind: document.Mapping, Mapping: []document.Entry{{Key: "shape", Value: beforeShape}}}
+	final := &document.Node{Kind: document.Mapping, Mapping: []document.Entry{{Key: "shape", Value: afterShape}}}
+	changePath := parseOverrideTestPath(t, "/shape/0")
+	snapshot := resolutionSnapshot{
+		change: Change{
+			Path: changePath, Origin: Origin{Layer: LayerResolution, Operation: ChangeNormalization},
+			Reasons: []string{"changed dynamic shape"}, Dependencies: []Path{Keys("source")},
+		},
+		before: beforeShape.Mapping[0].Value,
+		after:  afterShape.Sequence[0],
+	}
+	parentSnapshot := resolutionSnapshot{
+		change: Change{
+			Path: Keys("shape"), Origin: Origin{Layer: LayerResolution, Operation: ChangeNormalization},
+			Reasons: []string{"replaced container"},
+		},
+		before: beforeShape,
+		after:  afterShape,
+	}
+
+	var metadata Metadata
+	snapshots := []resolutionSnapshot{parentSnapshot, snapshot}
+	finalizeMetadataPathsWithResolution(&metadata, final, nil, snapshots, before, before)
+	if got := metadata.HistoricalPaths(); len(got) != 3 || got[0].String() != "" || got[1].String() != "/shape" || got[2].String() != "/shape/0" {
+		t.Fatalf("historical paths = %#v", got)
+	}
+	keyPath := Keys("shape", "0")
+	indexPath := Keys("shape").Index(0)
+	if !metadata.hasHistoricalPath(keyPath) || !metadata.hasHistoricalPath(indexPath) {
+		t.Fatalf("resolution shape inventory omitted key or index: %#v", metadata.HistoricalPaths())
+	}
+	if got := metadata.historyModel.selectHistory(keyPath); len(got) != 2 || !got[0].before || got[0].after || !got[1].before || got[1].after {
+		t.Fatalf("removed mapping-key resolution selection = %#v", got)
+	}
+	if got := metadata.historyModel.selectHistory(indexPath); len(got) != 2 || got[0].before || !got[0].after || got[1].before || !got[1].after {
+		t.Fatalf("introduced sequence-index resolution selection = %#v", got)
+	}
+	var retainedBefore, retainedAfter bool
+	for _, root := range metadata.historyModel.documentRoots() {
+		retainedBefore = retainedBefore || root == snapshot.before
+		retainedAfter = retainedAfter || root == snapshot.after
+	}
+	if !retainedBefore || !retainedAfter {
+		t.Fatalf("resolution roots not enumerated: before=%v after=%v", retainedBefore, retainedAfter)
+	}
+}