backend: support external SPARQL and named-graph snapshots

backend_go/graph_queries/named_graph_test.go

@@ -0,0 +1,49 @@
+package graph_queries
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestEdgeQueriesUseNamedGraphsAndDistinct(t *testing.T) {
+	tests := []struct {
+		name  string
+		query string
+	}{
+		{name: "default", query: defaultEdgeQuery(100, 25, false)},
+		{name: "hierarchy", query: hierarchyEdgeQuery(100, 25, false)},
+		{name: "types_only", query: typesOnlyEdgeQuery(100, 25, false)},
+	}
+
+	for _, tt := range tests {
+		if !strings.Contains(tt.query, "SELECT DISTINCT ?s ?p ?o") {
+			t.Fatalf("%s edge query should de-duplicate triples across named graphs:\n%s", tt.name, tt.query)
+		}
+		if !strings.Contains(tt.query, "GRAPH ?g") {
+			t.Fatalf("%s edge query should read from named graphs:\n%s", tt.name, tt.query)
+		}
+		if strings.Contains(tt.query, "owl:Class") {
+			t.Fatalf("%s edge query should no longer require owl:Class declarations:\n%s", tt.name, tt.query)
+		}
+	}
+}
+
+func TestPredicateQueriesUseNamedGraphs(t *testing.T) {
+	tests := []struct {
+		name  string
+		query string
+	}{
+		{name: "default", query: defaultPredicateQuery(false)},
+		{name: "hierarchy", query: hierarchyPredicateQuery(false)},
+		{name: "types_only", query: typesOnlyPredicateQuery(false)},
+	}
+
+	for _, tt := range tests {
+		if !strings.Contains(tt.query, "SELECT DISTINCT ?p") {
+			t.Fatalf("%s predicate query should remain distinct:\n%s", tt.name, tt.query)
+		}
+		if !strings.Contains(tt.query, "GRAPH ?g") {
+			t.Fatalf("%s predicate query should read from named graphs:\n%s", tt.name, tt.query)
+		}
+	}
+}