public void testRemoveLeftRangeIndex()

in hugegraph-test/src/main/java/org/apache/hugegraph/core/VertexCoreTest.java [391:514]
100 lines of code
7 McCabe index (conditional complexity)

    public void testRemoveLeftRangeIndex() throws InterruptedException {
        HugeGraph graph = graph();
        SchemaManager schema = graph.schema();

        schema.propertyKey("updateTime").asLong().create();

        schema.vertexLabel("soft").properties("name", "updateTime")
              .primaryKeys("name").create();

        schema.indexLabel("softByUpdateTime").onV("soft").range()
              .by("updateTime").create();

        final long testDataCount = 10L;

        for (int i = 1; i <= testDataCount; i++) {
            graph.addVertex(T.label, "soft", "name", "soft" + i,
                            "updateTime", i);
        }
        this.commitTx();

        long count = graph.traversal().V()
                          .has("soft", "updateTime",
                               ConditionP.gt(0))
                          .limit(-1)
                          .count()
                          .next();
        Assert.assertEquals(testDataCount, count);

        for (int i = 1; i <= testDataCount; i++) {
            graph.addVertex(T.label, "soft", "name", "soft" + i,
                            "updateTime", 2 * i);
        }
        this.commitTx();

        count = graph.traversal().V()
                     .has("soft", "updateTime",
                          ConditionP.gt(0))
                     .limit(-1)
                     .count()
                     .next();
        Assert.assertEquals(testDataCount, count);

        schema.propertyKey("score").asInt().create();
        schema.vertexLabel("developer").properties("name", "age", "score")
              .primaryKeys("name").create();

        schema.indexLabel("developerByAge").onV("developer").range()
              .by("age").create();
        schema.indexLabel("developerByScore").onV("developer").range()
              .by("score").create();

        for (int i = 1; i <= testDataCount; i++) {
            graph.addVertex(T.label, "developer", "name", "developer" + i,
                            "age", i,
                            "score", i);
        }
        this.commitTx();

        count = graph.traversal().V()
                     .hasLabel("developer")
                     .has("age", ConditionP.gt(0))
                     .has("score", ConditionP.gt(0))
                     .limit(-1)
                     .count()
                     .next();
        Assert.assertEquals(testDataCount, count);

        for (int i = 1; i <= testDataCount; i++) {
            graph.addVertex(T.label, "developer", "name", "developer" + i,
                            "age", i * 2,
                            "score", i * 2);
        }
        this.commitTx();

        count = graph.traversal().V()
                     .hasLabel("developer")
                     .has("age", ConditionP.gt(0))
                     .has("score", ConditionP.gt(0))
                     .limit(-1)
                     .count()
                     .next();

        Assert.assertEquals(testDataCount, count);

        // Wait left index to be removed
        Thread.sleep(2000);

        count = graph.traversal().V()
                     .hasLabel("developer")
                     .has("age", ConditionP.gt(0))
                     .limit(-1)
                     .count()
                     .next();
        // Debug stop here to see whether the left index be correctly determined
        Assert.assertEquals(testDataCount, count);

        // mock test removeLeftIndexIfNeeded
        boolean removeLeftIndexOnOverwrite =
                Whitebox.getInternalState(params().graphTransaction(),
                                          "removeLeftIndexOnOverwrite");
        Whitebox.setInternalState(params().graphTransaction(),
                                  "removeLeftIndexOnOverwrite", true);

        for (int i = 1; i <= testDataCount; i++) {
            graph.addVertex(T.label, "developer", "name", "developer" + i,
                            "age", i * 3,
                            "score", i * 3);
        }
        this.commitTx();

        if (!removeLeftIndexOnOverwrite) {
            Whitebox.setInternalState(params().graphTransaction(),
                                      "removeLeftIndexOnOverwrite", false);
        }

        count = graph.traversal().V()
                     .hasLabel("developer")
                     .has("age", ConditionP.gt(0))
                     .has("score", ConditionP.gt(0))
                     .limit(-1)
                     .count()
                     .next();
        Assert.assertEquals(testDataCount, count);
    }