fixed type of AqlExecutionExplainEntity.warnings (#579)

Author: rashtao

core/src/main/java/com/arangodb/entity/AqlExecutionExplainEntity.java

@@ -29,7 +29,7 @@ public final class AqlExecutionExplainEntity {
 
     private ExecutionPlan plan;
     private Collection<ExecutionPlan> plans;
-    private Collection<String> warnings;
+    private Collection<CursorWarning> warnings;
     private ExecutionStats stats;
     private Boolean cacheable;
 
@@ -41,7 +41,7 @@ public Collection<ExecutionPlan> getPlans() {
         return plans;
     }
 
-    public Collection<String> getWarnings() {
+    public Collection<CursorWarning> getWarnings() {
         return warnings;
     }
 

test-functional/src/test/java/com/arangodb/ArangoDatabaseAsyncTest.java

@@ -1084,6 +1084,18 @@ void explainQueryWithBindVars(ArangoDatabaseAsync db) throws ExecutionException,
         assertThat(plan.getNodes()).isNotEmpty();
     }
 
+    @ParameterizedTest
+    @MethodSource("asyncDbs")
+    void explainQueryWithWarnings(ArangoDatabaseAsync db) throws ExecutionException, InterruptedException {
+        AqlExecutionExplainEntity explain = db.explainQuery("return 1/0", null, null).get();
+        assertThat(explain.getWarnings())
+                .hasSize(1)
+                .allSatisfy(w -> {
+                    assertThat(w.getCode()).isEqualTo(1562);
+                    assertThat(w.getMessage()).isEqualTo("division by zero");
+                });
+    }
+
     @ParameterizedTest
     @MethodSource("asyncDbs")
     void explainQueryWithIndexNode(ArangoDatabaseAsync db) throws ExecutionException, InterruptedException {

test-functional/src/test/java/com/arangodb/ArangoDatabaseTest.java

@@ -1157,6 +1157,18 @@ void explainQueryWithBindVars(ArangoDatabase db) {
         assertThat(plan.getNodes()).isNotEmpty();
     }
 
+    @ParameterizedTest
+    @MethodSource("dbs")
+    void explainQueryWithWarnings(ArangoDatabase db) {
+        AqlExecutionExplainEntity explain = db.explainQuery("return 1/0", null, null);
+        assertThat(explain.getWarnings())
+                .hasSize(1)
+                .allSatisfy(w -> {
+                    assertThat(w.getCode()).isEqualTo(1562);
+                    assertThat(w.getMessage()).isEqualTo("division by zero");
+                });
+    }
+
     @ParameterizedTest
     @MethodSource("dbs")
     void explainQueryWithIndexNode(ArangoDatabase db) {