Immigrate rdflib-sparql (plus some prefiguring changes)

1 files changed, 28 insertions, 0 deletions

diff --git a/test/test_evaluate_bind.py b/test/test_evaluate_bind.py
new file mode 100644
index 00000000..8f3a4678
--- /dev/null
+++ b/test/test_evaluate_bind.py
@@ -0,0 +1,28 @@
+"""
+Verify evaluation of BIND expressions of different types. See
+<http://www.w3.org/TR/sparql11-query/#rExpression>.
+"""
+from rdflib import Graph, URIRef, Literal, Variable
+from rdflib.plugins.sparql.processor import SPARQLProcessor
+
+
+def test_bind():
+    base = "http://example.org/"
+    g = Graph()
+    g.add((URIRef(
+        base + "thing"), URIRef(base + "ns#comment"), Literal("anything")))
+    s = SPARQLProcessor(g)
+
+    def check(expr, var, obj):
+        r = s.query("""
+                prefix : <http://example.org/ns#>
+                select * where { ?s ?p ?o . %s } """ % expr)
+        assert r['bindings'][0][Variable(var)] == obj
+
+    yield (check, 'bind("thing" as ?name)', 'name', Literal("thing"))
+
+    yield (check, 'bind(<http://example.org/other> as ?other)', 'other',
+           URIRef("http://example.org/other"))
+
+    yield (check, "bind(:Thing as ?type)", 'type',
+           URIRef("http://example.org/ns#Thing"))