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提供了一个包含多行的文件，该文件由数据库中的（接受中的）系统加载。一个基于 JGiven 的简单测试场景将检查文件的行数是否与相应的表行匹配。Java 1.8 中模型实现的 maven 测试执行提供了以下内容（第一个输出）：

Test Class: com.testcomp.LoadingTest
 Check Loading Process
   Given that the parameters provided are for an input file ( BRANCH )for a specific date ( 20190105 )was provided
    When the number of file records is calculated
     And the loading is complete
     And the number of table rows loaded is calculated
    Then the no of file records (200) must match the no of table rows (200)

但是，不提供用于加载的文件是一个有效的选项。所以，我们有两个测试用例，maven 测试应该提供类似（第二个输出）：

Test Class: com.testcomp.LoadingTest1
 Check Loading Process
   Given that the parameters provided are for an input file ( BRANCH )for a specific date ( 20190105 )
     And the file exists
    When the number of file records is calculated
     And the loading is complete
     And the number of table rows loaded is calculated
    Then the no of file records (200) must match the no of table rows (200)

Test Class: com.testcomp.LoadingTest2
 Check Loading Process
   Given that the parameters provided are for an input file ( BRANCH )for a specific date ( 20190105 )
     And the file does NOT exist
    Then we check nothing

我们如何结合这两个测试用例，以便根据文件的存在，我们在任何一种情况下都有一个“通过”测试，知道是否提供了文件？ 或者 有没有办法创建类似于JGiven 本身的 HTML 报告 （第三个输出）：

Test Class: com.testcomp.LoadingTest3
 Check Loading Process
   Given that the parameters provided are for an input file ( BRANCH )for a specific date ( 20190105 )
     And the scenario has 2 cases from which only one may be true
    When checking the file's existence is done
     And for case 1 file existence is TRUE
     And for case 1 the number of file records is calculated
     And for case 1 the loading is complete
     And for case 1 the number of table rows loaded is calculated
     And for case 2 file existence is FALSE
    Then for case 1 the no of file records (200) must match the no of table rows (200)
     And for case 2 we check nothing

第一个输出的实现如下：

加载测试类

public class LoadingTest
    extends ScenarioTest<GivenWeHaveFile2Load, WhenFileAndDatabaseAreChecked, ThenCheckIfNoOfFileLinesMatchesNoOfTableRows> {

    @ScenarioStage
    WhenFileAndDatabaseAreChecked loadingFinishedState;

    @ScenarioStage
    WhenFileAndDatabaseAreChecked databaseState;

    @Test
    public void Check_Loading_Process() {
        given().that_an_input_file_for_a_specific_date_was_provided("BRANCH", "20190105");
        when().the_number_of_file_records_is_calculated();
        loadingFinishedState
                .and().the_loading_is_complete();
        databaseState
                .and().the_number_of_table_rows_loaded_is_calculated();
        then().the_no_of_file_records_must_match_the_no_of_table_rows();
    }
}

GivenWeHaveFile2Load 类

public class GivenWeHaveFile2Load extends Stage<GivenWeHaveFile2Load> {

    @ProvidedScenarioState
    String properFileName;

    @As( "that the parameters provided are for an input file ($) for a specific date ($) was provided" )
    public GivenWeHaveFile2Load that_an_input_file_for_a_specific_date_was_provided(String filenamePrefix, String dateStringYYYYMMDD) {
        properFileName = filenamePrefix + "_" + dateStringYYYYMMDD + ".txt";
        return self();
    }
}

WhenFileAndDatabaseAreChecked 类

public class WhenFileAndDatabaseAreChecked extends Stage<WhenFileAndDatabaseAreChecked> {

    @ExpectedScenarioState
    String properFileName;

    @ProvidedScenarioState
    int noOfFileRecords;

    @ProvidedScenarioState
    int noOfTableRows;

    // @ExtendedDescription("after we check the number of file lines") // does NOT seem to work..
    public WhenFileAndDatabaseAreChecked the_number_of_file_records_is_calculated() {
        // we'll use properFileName to get noOfFileRecords in the actual implementation
        noOfFileRecords = 200;
        return self();
    }

    public WhenFileAndDatabaseAreChecked the_loading_is_complete() {
        return self();
    }

    public WhenFileAndDatabaseAreChecked the_number_of_table_rows_loaded_is_calculated() {
        noOfTableRows = 200;
        return self();
    }
}

ThenCheckIfNoOfFileLinesMatchesNoOfTableRows 类

public class ThenCheckIfNoOfFileLinesMatchesNoOfTableRows extends Stage<ThenCheckIfNoOfFileLinesMatchesNoOfTableRows> {

    @ExpectedScenarioState
    int noOfFileRecords;

    @ExpectedScenarioState
    int noOfTableRows;

    @ScenarioState
    CurrentStep currentStep;

    public ThenCheckIfNoOfFileLinesMatchesNoOfTableRows the_no_of_file_records_must_match_the_no_of_table_rows () {
        currentStep.setName("the no of file records (" + noOfFileRecords + ") must match the no of table rows (" + noOfTableRows + ")");
        assert(noOfFileRecords == noOfTableRows);
        return self();
    }
}
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1 回答 1

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设计了一种不同的方法来满足需求：

  • 知道文件是否被提供
  • 根据文件的存在来区分结果输出

如果文件确实存在，我们可能会有这个（第一个输出）：

Test Class: com.testcomp.LoadingTest
 Check Loading Process
   Given that the parameters provided are for an input file ( BRANCH )for a specific date ( 20190105 )was provided
     And after checking for file existence ( result: true )
    When the number of file records is calculated
     And the loading is complete
     And the number of table rows loaded is calculated
    Then the no of file records (200) must match the no of table rows (200)

如果文件不存在，我们可能会有这个（第二个输出）：

Test Class: com.testcomp.LoadingTest
 Check Loading Process
   Given that the parameters provided are for an input file ( BRANCH )for a specific date ( 20190105 )was provided
     And after checking for file existence ( result: false )
    Then since we have no file it is OK

为实现上述目的，关键更改是在GivenWeHaveFile2Load类中定义after_checking_if_file_exists返回布尔值以表示文件存在的方法。然后可以在LoadingTest课堂上检查结果并区分为测试结果显示的“脚本”。从最初的四 (4) 类开始，仅WhenFileAndDatabaseAreChecked保持原样。下面提供了其余三 (3) 个的代码。

LoadingTest班级


public class LoadingTest
    extends ScenarioTest<GivenWeHaveFile2Load, WhenFileAndDatabaseAreChecked, ThenCheckIfNoOfFileLinesMatchesNoOfTableRows> {

    private Boolean fileExists;

    @ScenarioStage
    GivenWeHaveFile2Load CheckingFileExistenceState;

    @ScenarioStage
    WhenFileAndDatabaseAreChecked loadingFinishedState;

    @ScenarioStage
    WhenFileAndDatabaseAreChecked databaseState;

    @ScenarioStage
    ThenCheckIfNoOfFileLinesMatchesNoOfTableRows NoFileProvidedState;

    @Test
    public void Check_Loading_Process() {
        given().that_an_input_file_for_a_specific_date_was_provided("BRANCH", "20190105");
        fileExists = CheckingFileExistenceState
                .and().after_checking_if_file_exists();
        if (fileExists) {
            when().the_number_of_file_records_is_calculated();
            loadingFinishedState
                    .and().the_loading_is_complete();
            databaseState
                    .and().the_number_of_table_rows_loaded_is_calculated();
            then().the_no_of_file_records_must_match_the_no_of_table_rows();
        } else {
            NoFileProvidedState
                    .then().since_we_have_no_file_it_is_OK();
        }
        ;
    }
}

GivenWeHaveFile2Load班级

public class GivenWeHaveFile2Load extends Stage<GivenWeHaveFile2Load> {

    private Boolean fileExists;

    @ProvidedScenarioState
    String properFileName;

    @ScenarioState
    CurrentStep currentStep;

    public Boolean after_checking_if_file_exists() {
        currentStep.setName("after checking for file existence ( result: " + fileExists + " )");
        return fileExists;
    }

    public void setFileExists(Boolean fileExists) {
        this.fileExists = fileExists;
    }

    @As( "that the parameters provided are for an input file ($) for a specific date ($) was provided" )
    public GivenWeHaveFile2Load that_an_input_file_for_a_specific_date_was_provided(String filenamePrefix, String dateStringYYYYMMDD) {
        properFileName = filenamePrefix + "_" + dateStringYYYYMMDD + ".txt";
        this.setFileExists(Boolean.FALSE); // actual file check goes here
        return self();
    }
}

ThenCheckIfNoOfFileLinesMatchesNoOfTableRows班级

public class ThenCheckIfNoOfFileLinesMatchesNoOfTableRows extends Stage<ThenCheckIfNoOfFileLinesMatchesNoOfTableRows> {

    @ExpectedScenarioState
    int noOfFileRecords;

    @ExpectedScenarioState
    int noOfTableRows;

    @ScenarioState
    CurrentStep currentStep;

    public ThenCheckIfNoOfFileLinesMatchesNoOfTableRows the_no_of_file_records_must_match_the_no_of_table_rows () {
        currentStep.setName("the no of file records (" + noOfFileRecords + ") must match the no of table rows (" + noOfTableRows + ")");
        assert(noOfFileRecords == noOfTableRows);
        return self();
    }
    public ThenCheckIfNoOfFileLinesMatchesNoOfTableRows since_we_have_no_file_it_is_OK () {
        assert(Boolean.TRUE);
        return self();
    }
}
于 2019-10-11T12:48:55.970 回答