[Test] Fix test script (#1257)

* fix script

* t

* fix weird bugs

* fix

* fix

tests/cpp/test_serialize.cc

@@ -58,8 +58,8 @@ TEST(Serialize, HeteroGraph) {
   auto src = VecToIdArray<int64_t>({1, 2, 5, 3});
   auto dst = VecToIdArray<int64_t>({1, 6, 2, 6});
   auto mg1 = dgl::UnitGraph::CreateFromCOO(2, 9, 8, src, dst);
-  src = VecToIdArray<int64_t>({6, 2, 5, 1, 9});
-  dst = VecToIdArray<int64_t>({5, 2, 4, 9, 0});
+  src = VecToIdArray<int64_t>({6, 2, 5, 1, 8});
+  dst = VecToIdArray<int64_t>({5, 2, 4, 8, 0});
   auto mg2 = dgl::UnitGraph::CreateFromCOO(1, 9, 9, src, dst);
   std::vector<HeteroGraphPtr> relgraphs;
   relgraphs.push_back(mg1);
@@ -76,7 +76,6 @@ TEST(Serialize, HeteroGraph) {
   dmlc::MemoryStringStream ofs(&blob);
   HeteroGraph* gptr = dgl::Serializer::EmptyHeteroGraph();
   static_cast<dmlc::Stream*>(&ofs)->Read(gptr);
-
   EXPECT_EQ(gptr->NumVertices(0), 9);
   EXPECT_EQ(gptr->NumVertices(1), 8);
 }
\ No newline at end of file

tests/scripts/task_cpp_unit_test.sh

 #!/bin/bash
+function fail {
+    echo FAIL: $@
+    exit -1
+}
 echo $PWD
 pushd build
 ls -lh