Spring boot cloud contract usage with wiremock for integration tests and UI testing

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• Android PDF Viewer null object reference error

  I am using barteksc Android PDF Viewer like many others (https://github.com/barteksc/AndroidPdfViewer). I keep receiving a null object reference error. This is the error.

  E/AndroidRuntime: FATAL EXCEPTION: main
                    Process: group6.interactivehandwriting, PID: 24037
                    java.lang.RuntimeException: Unable to start activity ComponentInfo{group6.interactivehandwriting/group6.interactivehandwriting.activities.RoomActivity.RoomActivity}: android.view.InflateException: Binary XML file line #9: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
  

  I have checked to make sure I am referencing the views correctly. The asset I am loading called "sample.pdf" is in my assets.

  * Can you see any reason why I am receiving this error? *

  I realize there are multiple post about this library, however every instance seems to be unique so I decided to go ahead and ask.

  RoomActivity.java

  package group6.interactivehandwriting.activities.RoomActivity;
  
  import android.content.res.AssetManager;
  import android.os.Bundle;
  import android.app.Activity;
  import android.util.Log;
  import android.view.View;
  
  import com.github.barteksc.pdfviewer.PDFView;
  import com.github.barteksc.pdfviewer.listener.OnLoadCompleteListener;
  import com.github.barteksc.pdfviewer.listener.OnPageChangeListener;
  import com.github.barteksc.pdfviewer.scroll.DefaultScrollHandle;
  
  import group6.interactivehandwriting.R;
  import group6.interactivehandwriting.activities.RoomActivity.views.DocumentView;
  import group6.interactivehandwriting.activities.RoomActivity.views.RoomView;
  
  public class RoomActivity extends Activity implements OnPageChangeListener, OnLoadCompleteListener {
      RoomView roomView;
      DocumentView docView;
      PDFView pView;
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          Log.d("Android: ", "Setting content view to an instance of RoomView in: " + this.getClass().getName());
          setContentView(R.layout.activity_draw);
  
          System.out.println("Attempting to set ImageView..");
          pView = (PDFView) findViewById(R.id.pdfView);
          pView.fromAsset("sample.pdf").defaultPage(0)
                  .enableSwipe(true).swipeHorizontal(false).
                  onPageChange(this).enableAnnotationRendering(true).onLoad(this).scrollHandle(new DefaultScrollHandle(this)).load();
  
  
      }
  
      @Override
      public void onPageChanged(int page, int pageCount) {
          setTitle(String.format("%s %s / %s", "Sample", page + 1, pageCount));
      }
  
      @Override
      public void loadComplete(int nbPages) {
      }
  }
  

  AndroidManifest.xml

  <?xml version="1.0" encoding="utf-8"?>
  <manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="group6.interactivehandwriting">
  
      <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
      <application
          android:allowBackup="true"
          android:icon="@mipmap/ic_launcher"
          android:label="@string/app_name"
          android:roundIcon="@mipmap/ic_launcher_round"
          android:supportsRtl="true"
          android:theme="@style/AppTheme">
          <activity
              android:name=".activities.RoomActivity.RoomActivity"
              android:label="@string/title_activity_menu"
              android:theme="@style/AppTheme.NoActionBar">
              <intent-filter>
                  <action android:name="android.intent.action.MAIN" />
  
                  <category android:name="android.intent.category.LAUNCHER" />
              </intent-filter>
          </activity>
      </application>
  
  </manifest>
  

  activity_draw.xml

  <?xml version="1.0" encoding="utf-8"?>
  <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:context=".activities.RoomActivity.RoomActivity">
  
      <view
          android:id="@+id/room_view"
          id="@+id/view"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          app:layout_constraintBottom_toBottomOf="parent"
          app:layout_constraintEnd_toEndOf="parent"
          app:layout_constraintStart_toStartOf="parent"
          app:layout_constraintTop_toTopOf="parent" />
  
      <com.github.barteksc.pdfviewer.PDFView
          android:id="@+id/pdfView"
          android:layout_width="match_parent"
          android:layout_height="match_parent"/>
  
      <TextView
          android:id="@+id/textView"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_marginStart="8dp"
          android:layout_marginTop="8dp"
          android:text="@string/room"
          app:layout_constraintStart_toStartOf="parent"
          app:layout_constraintTop_toTopOf="parent" />
  
  </android.support.constraint.ConstraintLayout>
  

  Dependencies:

  compile 'com.github.barteksc:android-pdf-viewer:2.8.2'
  
  compile 'org.apache.commons:commons-collections4:4.1'
  
• Consider defining a bean named 'entityManagerFactory' in your configuration.3

  I'm just following some tutorial how to upload documents via spring. So while working on it i faced above issue. Since there are many questions related to same question i refer them and tried everything but none corrected m problem. In advance i don't need to add @Repository for my Repository interface and @EnableJpaRepositories in my Application class as i have use correct package sequence. For more reference refer https://dzone.com/articles/spring-spring-boot-and-component-scan. Please help me out.

  Application class

  @SpringBootApplication
  @ComponentScan("com.project.abhishek")
  public class DocumnetwebApplication {
  
  public static void main(String[] args) {
      SpringApplication.run(DocumnetwebApplication.class, args);
  }}
  

  Controller

  @Controller
  public class DocumentController {
  
  @Autowired
  private DocumentRepository documentRepo;
  
  @RequestMapping("/displayUpload")
  public String displayUpload() {
      return "documentUpload";
  }
  
  @RequestMapping(value="/upload", method=RequestMethod.POST )
  public String upload(@RequestParam("document")MultipartFile multiPartFile, @RequestParam("id")long id) {
  
      Document document = new Document(); 
      document.setId(id);
      document.setName(multiPartFile.getName());
      try {
          document.setData(multiPartFile.getBytes());
      } catch (IOException e) {
          e.printStackTrace();
      }
      documentRepo.save(document);
  
      return "documentUpload";
  }}
  

  Bean

  @Entity
  public class Document {
  
  @Id
  private long id;
  private String name;
  @Lob
  private byte[] data;
  //getters and setters}}
  

  Repository

  public interface DocumentRepository extends JpaRepository<Document, Long> {}
  

  Application properties file

  spring.datasource.url=jdbc:mysql://localhost:3306/mydb
  spring.datasource.username=root
  spring.datasource.password=test
  spring.jpa.properties.hibernate.id.new_generator_mappings=false
  spring.jpa.show-sql=true
  server.port=8083
  spring.mvc.view.prefix=/WEB-INF/jsps/
  spring.mvc.view.suffix=.jsp
  server.servlet.context-path= /documentweb
  

  pom file

  <dependencies>
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-data-jpa</artifactId>
      </dependency>
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
  
      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <scope>runtime</scope>
      </dependency>
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-test</artifactId>
          <scope>test</scope>
      </dependency>
      <dependency>
          <groupId>org.apache.tomcat.embed</groupId>
          <artifactId>tomcat-embed-jasper</artifactId>
          <version>9.0.12</version>
          <scope>provided</scope>
  
      </dependency>
      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
      </dependency>
  
  </dependencies>
  

  Package Structure

  com.project.abhishek---application class  
  com.project.abhishek.controller  
  com.project.abhishek.entity  
  com.project.abhishek.repository
  
• Trying to fit the settings activity in a fragment window - Android Studio

  I am working on an app and something troubles me, I want to create a settings activity in a fragment layout and the thing is that if I create a settings activity from the android studio's menu (this), there's no way that I can transform it into a fragment. I want to make it be this way (photo) .

  The thing is that when i change fragments, i use theFragment = new fragment_body();, where it is public class fragment_body extends Fragment, with its onCreateView of:

  public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
          return inflater.inflate(R.layout.view_settings, null);
      }
  

  where on the settings activity i don't have any of these things, i've tried multiple things but i don't know how to do it. Where the settings activity is: public class SettingsActivity extends PreferenceActivity. Please guide me of how to do this, Thanks in advance.
• How do I test an https redirect in ASP.NET Core?

  Recently, I came up with unit tests for checking some redirect rules of my ASP.NET Core 2.1 application:

  [Fact(DisplayName = "lowercase path")]
  public async Task LowercaseRedirect()
  {
      var result = await this.Client.GetAsync("/BLOG/");
      Assert.EndsWith("/blog/", result.RequestMessage.RequestUri.PathAndQuery, StringComparison.InvariantCulture);
  }
  
  [Fact(DisplayName = "add missing slash")]
  public async Task SlashRedirect()
  {
      var result = await this.Client.GetAsync("/blog");
      Assert.EndsWith("/blog/", result.RequestMessage.RequestUri.PathAndQuery, StringComparison.InvariantCulture);
  }
  

  FYI: I am currently injecting the WebApplicationFactory<TEntryPoint> into my test class, which I use to create my HttpClient.

  But now I am curious how to check if the https redirect is working. Any ideas how to accomplish that? Thanks in advance :)
• "Build Failed" when trying to run unit tests in XCode

  I'm working on a legacy project and trying to add unit tests to it.

  I can add a new Test Target just fine and Xcode generates a tests class for me. The thing is, when I try to run the default tests I get an error right out of the bat (Build Failed) and it complains about some .swiftdoc and .swiftmodule:

  

  Does anyone know how to solve this? I'm using XCode 10, if that helps.

  EDIT: I think it's worth noting that the project builds and runs perfectly other than that.
• How to share unit tests when using Git submodules to share code between Unity projects

  I am successfully sharing code between unity projects using git submodules. However, I'm trying to figure out how to also share the unit tests of such code.

  Right now I have the code being shared inside the Assets/Plugins folder. But unity test runner doesn't seem to recognize unit tests there.

  I tried creating a new folder called Assets/SharedCode. That didn't work since the rest of the code couldn't see that folder.

  Is there a way to organize this shared code in a way that makes sense? The only way I have it figured out is to put it in the scripts folder with the following structure:

  Code:  Assets/Scripts/SharedCode
  tests: Assets/Scripts/SharedCode/SharedCodeTests/Editor
  

  but that seems cumbersome, and it would be preferable to keep the scripts folder for that project's unique code only.
• FileNotFoundException for file in resource after packaging in war

  I have the following code and it works fine when it is executed directly from idea

      log.info("00");
      File file = new File(classLoader.getResource("template/legalStatistic.xlsx").getFile());
      log.info("01");
      log.info(String.valueOf(file == null));
      log.info(file.getAbsolutePath());
      Workbook workbook = null;
      try {
          workbook = WorkbookFactory.create(new FileInputStream(file));
      } catch (IOException e) {
          log.error(System.getProperty("user.dir"));
          throw new RuntimeException("There is some issues with file template/legalStatistic.xlsx", e);
      }
  

  However when this code packed in war file and executed but the command nohup java -Dfile.encoding=UTF-8 -jar name.war, the exception appears:

  INFO 14859 --- [nio-9001-exec-1] biz.Services.ExportToExcelService        : 00
  INFO 14859 --- [nio-9001-exec-1] biz.Services.ExportToExcelService        : 01
  INFO 14859 --- [nio-9001-exec-1] biz.Services.ExportToExcelService        : false
  INFO 14859 --- [nio-9001-exec-1] biz.Services.ExportToExcelService        : /home/bizon4ik/java/pitstop/target/file:/home/bizon4ik/java/pitstop/target/PitStop-1.0.war!/WEB-INF/classes!/template/legalStatistic.xlsx
  ERROR 14859 --- [nio-9001-exec-1] biz.Services.ExportToExcelService        : /home/bizon4ik/java/pitstop/target
  ERROR 14859 --- [nio-9001-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.RuntimeException: There is some issues with file template/legalStatistic.xlsx] with root cause
  
  java.io.FileNotFoundException: file:/home/bizon4ik/java/pitstop/target/PitStop-1.0.war!/WEB-INF/classes!/template/legalStatistic.xlsx (No such file or directory)
  at java.io.FileInputStream.open0(Native Method) ~[na:1.8.0_181]
  

  where is the problem? What I did wrong?

  PS WorkbookFactoryis part of Apache poi lib.
• Not-null property references a transient value in SpringBoot 2.0.5.RELEASE app

  I have a basic SpringBoot 2.0.5.RELEASE app. Using Spring Initializer, JPA, embedded Tomcat, Thymeleaf template engine, and package as an executable JAR file

  I have this object:

      public class Invoice  implements Serializable {
  
      @OneToMany( mappedBy = "invoice", 
                      orphanRemoval=true, 
                      cascade = CascadeType.ALL, 
                      fetch = FetchType.LAZY)
          @JsonIgnore
          private Set<Wallet> wallets = new HashSet<>();
      ...
  }
  

  and

  public class Wallet implements Serializable {
  
      @ManyToOne(fetch = FetchType.EAGER)
          @JoinColumn(name = "invoice_id")
          @JsonIgnore
          @NotNull
          private Invoice invoice;
      ..
      }
  

  and

  public class User implements Serializable {
  
   @OneToMany(cascade = CascadeType.ALL,orphanRemoval = true, fetch = FetchType.EAGER,mappedBy = "user")
      @JsonIgnore
      private List<Wallet> wallets = new ArrayList<Wallet>();
  ..
  }
  

  and this JunitTest:

  Invoice invoice = new Invoice("001");
          invoiceService.save(invoice);
  
          Wallet wallet = new Wallet();
          wallet.setName("myWallet");
          wallet.setInvoice(invoice);
  
          invoice.getWallets().add(wallet);
          invoiceService.save(invoice);
  
          User user = new User();
          user.setEmail("user.test@gmail.com");
          userService.save(user);
  

  But when I save I got this error:

  org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : com.tdk.backend.persistence.domain.backend.Wallet.invoice -> con.tdk.backend.persistence.domain.backend.Invoice; nested exception is java.lang.IllegalStateException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : com.tdk.backend.persistence.domain.backend.Wallet.invoice -> com.tdk.backend.persistence.domain.backend.Invoice
      at ....
  
• WireMock uses wrong __files directory for multi-directory mappings configuration

  I'm using Spring Boot with spring-cloud-contract-wiremock and com.github.tomakehurst.wiremock dependencies. My wiremock definitions are stored in json files. Like that:

  directoryA/mappings/detail-mapping-123.json:

  {
    "request" : {
      "urlPath" : "/detail/123",
      "method" : "GET"
    },
    "response" : {
      "status" : 200,
      "bodyFileName" : "detail.json",
      "headers" : {
        "Content-Type" : "application/json;charset=UTF-8"
      }
    }
  }
  

  directoryA/__files/detail.json:

  {
    "id": "123",
    "name": "name-123"
  }
  

  directoryB/mappings/search-mapping-123.json:

  {
    "request" : {
      "urlPath" : "/service/usa/search",
      "queryParameters" : {
        "query": {
          "equalTo": "123"
        }
      },
      "method" : "GET"
    },
    "response" : {
      "status" : 200,
      "bodyFileName" : "search-123.json",
      "headers" : {
        "Content-Type" : "application/json;charset=UTF-8"
      }
    }
  }
  

  directoryB/__files/search-123.json:

  {
    "count": 1,
    "units": [
      {
        "name": "A123"
      }
    ]
  }
  

  I have standard JUnit test class which is annotated with:

  @AutoConfigureWireMock(stubs = {"classpath:/directoryA/mappings", "classpath:/directoryB/mappings"},
          files = {"classpath:/directoryA", "classpath:/directoryB"},
          port = 18081)
  

  This files looks like are recognized correctly by wiremock and all definitions are parsed correctly, but the problem is with assigning correct body file to request: When application try to execute request:

  GET http://localhost:18081/service/usa/search?query=123 HTTP/1.1
  

  Then I'm getting error:

  java.lang.RuntimeException: java.io.FileNotFoundException: /home/my-project-dir/target/test-classes/directoryA/__files/search-123.json (Not found such file or directory) 
  

  So... The problem is that wiremock search for file defined in bodyFileName part of mapping definition (directoryB/mappings/search-mapping-123.json) in directory directoryA instead of directoryB, from where mapping file was used. If there will be used

  /home/my-project-dir/target/test-classes/directoryB/__files/search-123.json
  

  then everything should work fine...

  Does somebody had similar problem? I'm not sure if this is a bug in my configuration or in wiremock library.
• Spring Cloud Contract provider return same as request

  I'm working with two microservices using Spring Cloud Contract. One providing its contract, and the other one consuming it. In one scenario the provider response is the same that the request.

  So the provider contract is like this:

    Contract.make {
    request {
      method 'POST'
      url '/provider/foo'
      body(
          "foo": $(regex("[a-zA-Z0-9]{20}"))          
      )
    }
    response {
      status 200
      body(
          "fooResponse": fromRequest().body("\$.foo")
      )
   }
  

  And the generated wiremock mapping:

  {
    "id" : "a80c0871-f4c0-49e3-8cc1-94de39899669",
    "request" : {
      "url" : "/provider/foo",
      "method" : "POST",
      "bodyPatterns" : [ {
        "matchesJsonPath" : "$[?(@.['foo'] =~ /[a-zA-Z0-9]{20}/)]"
      } ]
    },
    "response" : {
      "status" : 200,
      "body" : "{\"fooResponse\":\"{{{jsonpath this '$.foo'}}}\"}",
      "transformers" : [ "response-template" ]
    },
    "uuid" : "a80c0871-f4c0-49e3-8cc1-94de39899669",
    "scenarioName" : "scenarioReturnSameAsRequest",
    "requiredScenarioState" : "Started"
  }
  

  But when my code calls to the provider, with foo as any text, the wiremock returns:

  {
      "fooResponse" : "{{{jsonpath this '$.foo'}}}"
  }
  

  How can I build a contract that responses the same parameters as the request body?
• Read JSON mapping file

  I want to read the value of response file name from "bodyFileName " element of JSON wiremock mapping file,and then write the response filename and mapping filename in excel
• Spring Cloud Contract for provider - setting optional header

  I've created a contract on a provider side:

  Contract.make { 
      request {
          method 'GET'
          url('/cars/car?id=3')
          headers {
              header(accept(), "application/hal+json")
              header(SOME OTHER HEADER)
          }
      }
      response {
          ...
      }
  }
  

  Unfortunately one of my customers do not send request with "header(SOME OTHER HEADER)". My question is how can I mark "header(SOME OTHER HEADER)" as optional?