org.neo4j.driver.v1.types.Node.hasLabel()方法的使用及代码示例

x33g5p2x  于2022-01-25 转载在 其他  
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本文整理了Java中org.neo4j.driver.v1.types.Node.hasLabel()方法的一些代码示例，展示了Node.hasLabel()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Node.hasLabel()方法的具体详情如下：
包路径：org.neo4j.driver.v1.types.Node
类名称：Node
方法名：hasLabel

Node.hasLabel介绍

[英]Test if this node has a given label
[中]测试此节点是否具有给定的标签

代码示例

代码示例来源：origin: opencypher/cypher-for-gremlin

  1. @Test
  2. public void returnNodeAndRelationship() {
  3.   Driver driver = GremlinDatabase.driver("//localhost:" + server.getPort());
  4.   try (Session session = driver.session()) {
  5.     StatementResult result = session.run("CREATE (n1:Person {name: 'Marko'})-[r:knows {since:1999}]->(n2:Person)" +
  6.         "RETURN n1,r,n2",
  7.       parameters("message", "Hello"));
  8.     Record record = result.single();
  9.     Node n1 = record.get("n1").asNode();
  10.     Relationship r = record.get("r").asRelationship();
  11.     Node n2 = record.get("n2").asNode();
  12.     assertThat(n1.hasLabel("Person")).isTrue();
  13.     assertThat(n1.get("name").asString()).isEqualTo("Marko");
  14.     assertThat(r.hasType("knows")).isTrue();
  15.     assertThat(r.startNodeId()).isEqualTo(n1.id());
  16.     assertThat(r.endNodeId()).isEqualTo(n2.id());
  17.     assertThat(r.get("since").asLong()).isEqualTo(1999L);
  18.     assertThat(n2.hasLabel("Person")).isTrue();
  19.   }
  20. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldCreateAnEntityWithPropertiesWithAStateAndItsPropertiesWithAdditionalLabelButNoDate() throws Throwable {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // When
  7.     StatementResult result = session.run("CALL graph.versioner.init('Entity', {key:'value'}, {key:'value'}, 'Error')");
  8.     StatementResult entityResult = session.run("MATCH (e:Entity) RETURN properties(e) as props");
  9.     StatementResult stateResult = session.run("MATCH (s:State) RETURN s");
  10.     Node state = stateResult.single().get("s").asNode();
  11.     StatementResult stateProps = session.run("MATCH (s:State) RETURN properties(s) as props");
  12.     StatementResult currentResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) RETURN id(e) as id");
  13.     StatementResult hasStatusResult = session.run("MATCH (e:Entity)-[:HAS_STATE]->(s:State) RETURN id(e) as id");
  14.     // Then
  15.     assertThat(result.single().get("node").asNode().id(), equalTo(0L));
  16.     assertThat(entityResult.single().get("props").asMap().isEmpty(), equalTo(false));
  17.     assertThat(state.id(), equalTo(1L));
  18.     assertThat(stateProps.single().get("props").asMap().isEmpty(), equalTo(false));
  19.     assertThat(currentResult.single().get("id").asLong(), equalTo(0L));
  20.     assertThat(hasStatusResult.single().get("id").asLong(), equalTo(0L));
  21.     assertThat(state.hasLabel("Error"), equalTo(true));
  22.   }
  23. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldCreateAnEntityWithPropertiesWithAStateAndItsPropertiesWithAdditionalLabelAndDate() throws Throwable {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // When
  7.     StatementResult result = session.run("CALL graph.versioner.init('Entity', {key:'value'}, {key:'value'}, 'Error', localdatetime('1988-10-27T02:46:40'))");
  8.     StatementResult entityResult = session.run("MATCH (e:Entity) RETURN properties(e) as props");
  9.     StatementResult stateResult = session.run("MATCH (s:State) RETURN s");
  10.     Node state = stateResult.single().get("s").asNode();
  11.     StatementResult stateProps = session.run("MATCH (s:State) RETURN properties(s) as props");
  12.     StatementResult currentResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) RETURN id(e) as id");
  13.     StatementResult hasStatusResult = session.run("MATCH (e:Entity)-[:HAS_STATE]->(s:State) RETURN id(e) as id");
  14.     StatementResult hasStatusDateResult = session.run("MATCH (e:Entity)-[rel:CURRENT]->(s:State) RETURN rel.date as date");
  15.     // Then
  16.     assertThat(result.single().get("node").asNode().id(), equalTo(0L));
  17.     assertThat(entityResult.single().get("props").asMap().isEmpty(), equalTo(false));
  18.     assertThat(state.id(), equalTo(1L));
  19.     assertThat(stateProps.single().get("props").asMap().isEmpty(), equalTo(false));
  20.     assertThat(currentResult.single().get("id").asLong(), equalTo(0L));
  21.     assertThat(hasStatusResult.single().get("id").asLong(), equalTo(0L));
  22.     assertThat(state.hasLabel("Error"), equalTo(true));
  23.     assertThat(hasStatusDateResult.single().get("date").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
  24.   }
  25. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldRollbackNthWorkCorrectly() {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(:State:Error {key:'initialValue'})"
  8.         + "-[:PREVIOUS {date: localdatetime('1988-10-26T00:00:00')}]->(:State {key:'value'})-[:PREVIOUS {date: localdatetime('1988-10-25T00:00:00')}]->(:State:Test {key:'testValue'})");
  9.     session.run("MATCH (e:Entity)-[:CURRENT]->(s:Error) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  10.     session.run("MATCH (e:Entity), (s:State {key:'value'}) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  11.     session.run("MATCH (e:Entity), (s:Test) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-25T00:00:00'), endDate:localdatetime('1988-10-26T00:00:00')}]->(s)");
  12.     // When
  13.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.rollback.nth(e, 2) YIELD node RETURN node");
  14.     // Then
  15.     boolean failure = true;
  16.     while (result.hasNext()) {
  17.       failure = false;
  18.       assertThat(result.next().get("node").asNode().hasLabel("Test"), equalTo(true));
  19.     }
  20.     session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) RETURN s");
  21.     while(!failure && result.hasNext()) {
  22.       assertThat(result.next().get("node").asNode().hasLabel("Test"), equalTo(true));
  23.     }
  24.     if (failure) {
  25.       fail();
  26.     }
  27.   }
  28. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldGetNthStateNodeOfGivenEntity() {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (:Entity {key:'immutableValue'})-[:CURRENT]->(:State:Error {key:'initialValue'})"
  8.         + "-[:PREVIOUS]->(:State {key:'value'})-[:PREVIOUS]->(:State:Test {key:'testValue'})");
  9.     // When
  10.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.get.nth.state(e, 2) YIELD node RETURN node");
  11.     // Then
  12.     boolean failure = true;
  13.     while (result.hasNext()) {
  14.       failure = false;
  15.       assertThat(result.next().get("node").asNode().hasLabel("Test"), equalTo(true));
  16.     }
  17.     if (failure) {
  18.       fail();
  19.     }
  20.   }
  21. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2.   public void shouldRollbackNthToZeroWorkCorrectly() {
  3.     // This is in a try-block, to make sure we close the driver after the test
  4.     try (Driver driver = GraphDatabase
  5.         .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.       // Given
  7.       session.run("CREATE (:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(:State:Error {key:'initialValue'})"
  8.           + "-[:PREVIOUS]->(:State {key:'value'})-[:PREVIOUS {date: localdatetime('1988-10-26T00:00:00')}]->(:State:Test {key:'testValue'})");
  9.       session.run("MATCH (e:Entity)-[:CURRENT]->(s:Error) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  10.       session.run("MATCH (e:Entity), (s:State {key:'value'}) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  11.       session.run("MATCH (e:Entity), (s:Test) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-25T00:00:00'), endDate:localdatetime('1988-10-26T00:00:00')}]->(s)");
  13.       // When
  14.       StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.rollback.nth(e, 0) YIELD node RETURN node");
  16.       // Then
  17.       Assertions.assertThat(result).isEmpty();
  19.       result = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) RETURN s");
  21.       Assertions.assertThat(result)
  22.           .hasSize(1)
  23.           .allMatch(node -> node.get("s").asNode().hasLabel("Error"));
  24.     }
  25.   }
  26. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldGetOneErrorStateNodeByGivenErrorLabel() {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Error {key:'initialValue'})");
  8.     // When
  9.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.get.by.label(e, 'Error') YIELD node RETURN node");
  10.     // Then
  11.     boolean failure = true;
  12.     while (result.hasNext()) {
  13.       failure = false;
  14.       assertThat(result.next().get("node").asNode().hasLabel("Error"), equalTo(true));
  15.     }
  16.     if (failure) {
  17.       fail();
  18.     }
  19.   }
  20. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2.   public void shouldGetNthZeroStateNodeOfGivenEntity() {
  3.     // This is in a try-block, to make sure we close the driver after the test
  4.     try (Driver driver = GraphDatabase
  5.         .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.       // Given
  7.       session.run("CREATE (:Entity {key:'immutableValue'})-[:CURRENT]->(:State:Error {key:'initialValue'})"
  8.           + "-[:PREVIOUS]->(:State {key:'value'})-[:PREVIOUS]->(:State:Test {key:'testValue'})");
  10.       // When
  11.       StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.get.nth.state(e, 0) YIELD node RETURN node");
  13.       // Then
  14.       boolean failure = true;
  16.       while (result.hasNext()) {
  17.         failure = false;
  18.         assertThat(result.next().get("node").asNode().hasLabel("Error"), equalTo(true));
  19.       }
  21.       if (failure) {
  22.         fail();
  23.       }
  24.     }
  25.   }
  26. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldCreateANewStateWithAdditionalLabelButWithoutDate() throws Throwable {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  9.     // When
  10.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.update(e, {key:'newValue'}, 'Error') YIELD node RETURN node");
  11.     StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
  12.     StatementResult nextResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) return s2");
  13.     StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
  14.     StatementResult currentStateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s) return s");
  15.     // Then
  16.     assertThat(countStateResult.single().get("s").asLong(), equalTo(2L));
  17.     assertThat(nextResult.single().get("s2").asNode().id(), equalTo(1L));
  18.     assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
  19.     assertThat(currentStateResult.single().get("s").asNode().hasLabel("Error"), equalTo(true));
  20.   }
  21. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldCreateAndPatchANewStateWithAdditionalLabelButWithoutDate() throws Throwable {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  9.     // When
  10.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.patch(e, {key:'newValue', newKey:'newestValue'}, 'Error') YIELD node RETURN node");
  11.     Node currentState = result.single().get("node").asNode();
  12.     StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
  13.     StatementResult nextResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) return s2");
  14.     StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
  15.     StatementResult currentStateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s) return s");
  16.     // Then
  17.     assertThat(countStateResult.single().get("s").asLong(), equalTo(2L));
  18.     assertThat(nextResult.single().get("s2").asNode().id(), equalTo(1L));
  19.     assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
  20.     assertThat(currentStateResult.single().get("s").asNode().hasLabel("Error"), equalTo(true));
  21.     assertThat(currentState.get("key").asString(), equalTo("newValue"));
  22.     assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
  23.   }
  24. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldGetAllErrorStateNodeByGivenErrorLabel() {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Error {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Error {key:'initialValue'})");
  9.     session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Error {key:'initialValue'})");
  10.     // When
  11.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.get.by.label(e, 'Error') YIELD node RETURN node");
  12.     // Then
  13.     boolean failure = true;
  14.     while (result.hasNext()) {
  15.       failure = false;
  16.       assertThat(result.next().get("node").asNode().hasLabel("Error"), equalTo(true));
  17.     }
  18.     if (failure) {
  19.       fail();
  20.     }
  21.   }
  22. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldGetSpecificStateNodeByGivenEntityAndDate() {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Error {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-28T00:00:00')}]->(s:State:Test {key:'initialValue'})");
  9.     session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-29T00:00:00')}]->(s:State {key:'initialValue'})");
  10.     // When
  11.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.get.by.date(e, localdatetime('1988-10-28T00:00:00')) YIELD node RETURN node");
  12.     // Then
  13.     boolean failure = true;
  14.     while (result.hasNext()) {
  15.       failure = false;
  16.       assertThat(result.next().get("node").asNode().hasLabel("Test"), equalTo(true));
  17.     }
  18.     if (failure) {
  19.       fail();
  20.     }
  21.   }
  22. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldCreateAndPatchANewStateWithAdditionalLabelAndDate() throws Throwable {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  9.     // When
  10.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.patch(e, {key:'newValue', newKey:'newestValue'}, 'Error', localdatetime('1988-10-27T02:46:40')) YIELD node RETURN node");
  11.     Node currentState = result.single().get("node").asNode();
  12.     StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
  13.     StatementResult nextResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) return s2");
  14.     StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
  15.     StatementResult currentStateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s) return s");
  16.     StatementResult dateResult = session.run("MATCH (e:Entity)-[r:CURRENT]->(s) RETURN r.date as relDate");
  17.     StatementResult hasStatusDateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State)-[:PREVIOUS]->(s2:State)<-[rel:HAS_STATE]-(e) RETURN rel.endDate as endDate");
  18.     // Then
  19.     assertThat(countStateResult.single().get("s").asLong(), equalTo(2L));
  20.     assertThat(nextResult.single().get("s2").asNode().id(), equalTo(1L));
  21.     assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
  22.     assertThat(currentStateResult.single().get("s").asNode().hasLabel("Error"), equalTo(true));
  23.     assertThat(dateResult.single().get("relDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
  24.     assertThat(hasStatusDateResult.single().get("endDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
  25.     assertThat(currentState.get("key").asString(), equalTo("newValue"));
  26.     assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
  27.   }
  28. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldCreateANewStateWithAdditionalLabelAndDate() throws Throwable {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  9.     // When
  10.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.update(e, {key:'newValue'}, 'Error', localdatetime('1988-10-27T02:46:40')) YIELD node RETURN node");
  11.     StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
  12.     StatementResult nextResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) return s2");
  13.     StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
  14.     StatementResult currentStateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s) return s");
  15.     StatementResult dateResult = session.run("MATCH (e:Entity)-[r:CURRENT]->(s) RETURN r.date as relDate");
  16.     StatementResult hasStatusDateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State)-[:PREVIOUS]->(s2:State)<-[rel:HAS_STATE]-(e) RETURN rel.endDate as endDate");
  17.     // Then
  18.     assertThat(countStateResult.single().get("s").asLong(), equalTo(2L));
  19.     assertThat(nextResult.single().get("s2").asNode().id(), equalTo(1L));
  20.     assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
  21.     assertThat(currentStateResult.single().get("s").asNode().hasLabel("Error"), equalTo(true));
  22.     assertThat(dateResult.single().get("relDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
  23.     assertThat(hasStatusDateResult.single().get("endDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
  24.   }
  25. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldRollbackToTheGivenStateNode() {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'}) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  9.     session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Test {key:'initialValue'})");
  10.     session.run("MATCH (sc:State)<-[:CURRENT]-(e:Entity)-[:HAS_STATE]->(s:Test) CREATE (sc)-[:PREVIOUS {date:localdatetime('1988-10-26T00:00:00')}]->(s)");
  11.     // When
  12.     StatementResult result = session.run("MATCH (e:Entity)--(s:Test) WITH e, s CALL graph.versioner.rollback.to(e, s) YIELD node RETURN node");
  13.     // Then
  14.     boolean failure = true;
  15.     while (result.hasNext()) {
  16.       failure = false;
  17.       assertThat(result.next().get("node").asNode().hasLabel("Test"), equalTo(true));
  18.     }
  19.     if (failure) {
  20.       fail();
  21.     }
  22.   }
  23. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldGetOldNodeAfterARollbackOnATwoStateEntityNode() {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'}) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  9.     session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]->(s:State:Test {key:'initialValue'})");
  10.     session.run("MATCH (sc:State)<-[:CURRENT]-(e:Entity)-[:HAS_STATE]->(s:Test) CREATE (sc)-[:PREVIOUS {date:localdatetime('1988-10-26T00:00:00')}]->(s)");
  11.     // When
  12.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.rollback(e) YIELD node RETURN node");
  13.     // Then
  14.     boolean failure = true;
  15.     while (result.hasNext()) {
  16.       failure = false;
  17.       assertThat(result.next().get("node").asNode().hasLabel("Test"), equalTo(true));
  18.     }
  19.     if (failure) {
  20.       fail();
  21.     }
  22.   }
  23. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldCreateAndPatchANewStateWithAdditionalLabelAndDateButWithANewProp() throws Throwable {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity)-[:CURRENT]->(s:State) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  9.     // When
  10.     StatementResult result = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.patch(e, {newKey:'newestValue'}, 'Error', localdatetime('1988-10-27T02:46:40')) YIELD node RETURN node");
  11.     Node currentState = result.single().get("node").asNode();
  12.     StatementResult countStateResult = session.run("MATCH (s:State) RETURN count(s) as s");
  13.     StatementResult nextResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) return s2");
  14.     StatementResult correctStateResult = session.run("MATCH (s1:State)-[:PREVIOUS]->(s2:State) WITH s1 MATCH (e:Entity)-[:CURRENT]->(s1) return e");
  15.     StatementResult currentStateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s) return s");
  16.     StatementResult dateResult = session.run("MATCH (e:Entity)-[r:CURRENT]->(s) RETURN r.date as relDate");
  17.     StatementResult hasStatusDateResult = session.run("MATCH (e:Entity)-[:CURRENT]->(s:State)-[:PREVIOUS]->(s2:State)<-[rel:HAS_STATE]-(e) RETURN rel.endDate as endDate");
  18.     // Then
  19.     assertThat(countStateResult.single().get("s").asLong(), equalTo(2L));
  20.     assertThat(nextResult.single().get("s2").asNode().id(), equalTo(1L));
  21.     assertThat(correctStateResult.single().get("e").asNode().id(), equalTo(0L));
  22.     assertThat(currentStateResult.single().get("s").asNode().hasLabel("Error"), equalTo(true));
  23.     assertThat(dateResult.single().get("relDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
  24.     assertThat(hasStatusDateResult.single().get("endDate").asLocalDateTime(), equalTo(convertEpochToLocalDateTime(593920000000L)));
  25.     assertThat(currentState.get("key").asString(), equalTo("initialValue"));
  26.     assertThat(currentState.get("newKey").asString(), equalTo("newestValue"));
  27.   }
  28. }

代码示例来源：origin: h-omer/neo4j-versioner-core

  1. @Test
  2. public void shouldUseExistingRollbackRelationshipToRollBackAgain() {
  3.   // This is in a try-block, to make sure we close the driver after the test
  4.   try (Driver driver = GraphDatabase
  5.       .driver(neo4j.boltURI(), Config.build().withEncryption().toConfig()); Session session = driver.session()) {
  6.     // Given
  7.     session.run("CREATE (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
  8.     session.run("MATCH (e:Entity {key:'immutableValue'})-[:CURRENT {date:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'}) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-27T00:00:00')}]->(s)");
  9.     session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]->(s:State {key:'initialValue'})");
  10.     session.run("MATCH (sc:State)<-[:CURRENT]-(e:Entity)-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]->(s:State) CREATE (sc)-[:PREVIOUS {date:localdatetime('1988-10-26T00:00:00')}]->(s)");
  11.     session.run("MATCH (e:Entity) CREATE (e)-[:HAS_STATE {startDate:localdatetime('1988-10-25T00:00:00'), endDate:localdatetime('1988-10-26T00:00:00')}]->(s:State:Test {key:'initialValue'})");
  12.     session.run("MATCH (new:State)<-[:HAS_STATE {startDate:localdatetime('1988-10-26T00:00:00'), endDate:localdatetime('1988-10-27T00:00:00')}]-(e:Entity)-[:HAS_STATE {startDate:localdatetime('1988-10-25T00:00:00'), endDate:localdatetime('1988-10-26T00:00:00')}]->(old:State) CREATE (new)-[:PREVIOUS {date:localdatetime('1988-10-25T00:00:00')}]->(old)");
  13.     // When
  14.     session.run("MATCH (e:Entity) WITH e CALL graph.versioner.rollback(e) YIELD node RETURN node");
  15.     StatementResult finalResult = session.run("MATCH (e:Entity) WITH e CALL graph.versioner.rollback(e) YIELD node RETURN node");
  16.     // Then
  17.     boolean failure = true;
  18.     while (finalResult.hasNext()) {
  19.       failure = false;
  20.       assertThat(finalResult.next().get("node").asNode().hasLabel("Test"), equalTo(true));
  21.     }
  22.     if (failure) {
  23.       fail();
  24.     }
  25.   }
  26. }

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