backend: support external SPARQL and named-graph snapshots

backend_go/selection_queries/named_graph_test.go

@@ -0,0 +1,33 @@
+package selection_queries
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestSelectionQueriesUseNamedGraphs(t *testing.T) {
+	selected := []NodeRef{
+		{ID: 1, TermType: "uri", IRI: "http://example.com/A"},
+	}
+
+	tests := []struct {
+		name  string
+		query string
+	}{
+		{name: "neighbors", query: neighborsQuery(selected, false)},
+		{name: "superclasses", query: superclassesQuery(selected, false)},
+		{name: "subclasses", query: subclassesQuery(selected, false)},
+	}
+
+	for _, tt := range tests {
+		if !strings.Contains(tt.query, "SELECT DISTINCT ?s ?p ?o") {
+			t.Fatalf("%s query should de-duplicate triples across named graphs:\n%s", tt.name, tt.query)
+		}
+		if !strings.Contains(tt.query, "GRAPH ?g") {
+			t.Fatalf("%s query should read from named graphs:\n%s", tt.name, tt.query)
+		}
+		if strings.Contains(tt.query, "owl:Class") {
+			t.Fatalf("%s query should no longer depend on owl:Class:\n%s", tt.name, tt.query)
+		}
+	}
+}