explicitly test graphql explain support (#184)

Author: brianru

test/graphql.spec.js

@@ -95,4 +95,62 @@ type Episode {
       expect(res.body).toHaveProperty('data');
       expect(res.body.data).toBeInstanceOf(Array);
     }));
+
+  it('explain', () =>
+    graphql
+      .execute(conn, database, '{ Character { name }}', { '@explain': true })
+      .then(res => {
+        expect(res.status).toBe(200);
+        expect(res.body).toHaveProperty('data');
+        expect(res.body.data).toEqual({
+          fields: { '0': { '1': 'name' } },
+          plan:
+            'prefix : <http://api.stardog.com/>\n\nFrom all\nProjection(?0, ?1) [#1]\n`─ MergeJoin(?0) [#1]\n   +─ Scan[POSC](?0, <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>, :Character) [#1]\n   `─ Scan[PSOC](?0, :name, ?1) [#1]\n',
+          sparql:
+            'SELECT *\nFROM <tag:stardog:api:context:all>\n{\n?0 rdf:type :Character .\n?0 :name ?1 .\n}\n',
+        });
+      }));
+
+  it('explainAsJson', () =>
+    graphql
+      .execute(conn, database, '{ Character { name }}', {
+        '@explain': true,
+        '@explainAsJson': true,
+      })
+      .then(res => {
+        expect(res.status).toBe(200);
+        expect(res.body).toHaveProperty('data');
+        expect(res.body.data).toEqual({
+          fields: { '0': { '1': 'name' } },
+          plan: {
+            dataset: { from: 'all' },
+            plan: {
+              cardinality: 1,
+              children: [
+                {
+                  cardinality: 1,
+                  children: [
+                    {
+                      cardinality: 1,
+                      children: [],
+                      label:
+                        'Scan[POSC](?0, <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>, :Character)',
+                    },
+                    {
+                      cardinality: 1,
+                      children: [],
+                      label: 'Scan[PSOC](?0, :name, ?1)',
+                    },
+                  ],
+                  label: 'MergeJoin(?0)',
+                },
+              ],
+              label: 'Projection(?0, ?1)',
+            },
+            prefixes: { '': 'http://api.stardog.com/' },
+          },
+          sparql:
+            'SELECT *\nFROM <tag:stardog:api:context:all>\n{\n?0 rdf:type :Character .\n?0 :name ?1 .\n}\n',
+        });
+      }));
 });