Merge pull request #23 from RedisGraph/runtime-exceptions

added support for server exceptions.

Author: DvirDukhan

src/resultSet.js

@@ -1,7 +1,8 @@
 const Statistics = require("./statistics"),
     Record = require("./record");
-Node = require("./node");
-Edge = require("./edge");
+    Node = require("./node");
+    Edge = require("./edge");
+    ReplyError = require("redis").ReplyError
 
 const ResultSetColumnTypes = {
     COLUMN_UNKNOWN: 0,
@@ -40,9 +41,11 @@ class ResultSet {
      *                    The last list is the statistics list.
      */
     async parseResponse(resp) {
-        if (Array.isArray(resp)) {
-            if (resp.length < 3) {
-                this._statistics = new Statistics(resp[resp.length - 1]);
+        if(Array.isArray(resp)) {
+            let statistics = resp[resp.length - 1];
+            if(statistics instanceof ReplyError) throw statistics;
+            if(resp.length < 3) {
+                this._statistics = new Statistics(statistics);
             } else {
                 await this.parseResults(resp);
                 this._resultsCount = this._results.length;

test/redisGraphAPITest.js

@@ -263,4 +263,29 @@ describe('RedisGraphAPI Test', function () {
             console.log(error);
         })
     })
+
+    it('testCompileTimeException', (done) => {
+        api.query("CREATE ()").then(response => {
+            api.query("RETURN toUpper(5)").then(response => assert(false)).catch (err => {
+                assert(err instanceof redis.ReplyError);
+                assert.equal(err.message, "Type mismatch: expected String but was Integer");
+                done();
+            })
+        }).catch(error => {
+            console.log(error);
+        })
+    })
+
+    it('testRuntimeException', (done) => {
+        api.query("CREATE ({val:5})").then(response => {
+            api.query("MATCH (n) RETURN toUpper(n.val)").then(response => assert(false)).catch (err => {
+                assert(err instanceof redis.ReplyError);
+                assert.equal(err.message, "Type mismatch: expected String but was Integer");
+                done();
+            })
+        }).catch(error => {
+            console.log(error);
+        })
+    })
+
 });