hugegraph-test/src/main/java/org/apache/hugegraph/core/VertexCoreTest.java [877:908]:
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        schema.vertexLabel("programmer")
              .useAutomaticId()
              .properties("name", "age", "city")
              .create();

        Vertex v1 = graph.addVertex(T.label, "programmer", "name", "marko",
                                    "age", 18, "city", "Beijing");
        this.mayCommitTx();

        List<Vertex> vertices = graph.traversal().V().toList();
        Assert.assertEquals(1, vertices.size());
        assertContains(vertices,
                       T.label, "programmer", "name", "marko",
                       "age", 18, "city", "Beijing");

        Vertex v2 = graph.addVertex(T.label, "programmer", "name", "marko",
                                    "age", 18, "city", "Beijing");
        this.mayCommitTx();

        Assert.assertNotEquals(v1.id(), v2.id());

        vertices = graph.traversal().V().toList();
        Assert.assertEquals(2, vertices.size());

        vertices = graph.traversal().V(v2.id()).toList();
        Assert.assertEquals(1, vertices.size());
        assertContains(vertices,
                       T.label, "programmer", "name", "marko",
                       "age", 18, "city", "Beijing");
    }

    @Test
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hugegraph-test/src/main/java/org/apache/hugegraph/core/VertexCoreTest.java [917:948]:
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        schema.vertexLabel("programmer")
              .useAutomaticId()
              .properties("name", "age", "city")
              .create();

        Vertex v1 = graph.addVertex(T.label, "programmer", "name", "marko",
                                    "age", 18, "city", "Beijing");
        this.mayCommitTx();

        List<Vertex> vertices = graph.traversal().V().toList();
        Assert.assertEquals(1, vertices.size());
        assertContains(vertices,
                       T.label, "programmer", "name", "marko",
                       "age", 18, "city", "Beijing");

        Vertex v2 = graph.addVertex(T.label, "programmer", "name", "marko",
                                    "age", 18, "city", "Beijing");
        this.mayCommitTx();

        Assert.assertNotEquals(v1.id(), v2.id());

        vertices = graph.traversal().V().toList();
        Assert.assertEquals(2, vertices.size());

        vertices = graph.traversal().V(v2.id()).toList();
        Assert.assertEquals(1, vertices.size());
        assertContains(vertices,
                       T.label, "programmer", "name", "marko",
                       "age", 18, "city", "Beijing");
    }

    @Test
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