Tags down


First time writing junit: Need suggestions

By : Kristian Davidsen
Date : August 02 2020, 07:00 AM
fixed the issue. Will look into that further As a rule of thumb, this about tests like a tool that is here to help you the programmer to make sure that the code you wrote behaves as expected.
With this in mind, what are the inputs you would like to test so that you could be sure that your code works?
code :

Share : facebook icon twitter icon

Suggestions for writing a programming language?

By : Jake Cattrall
Date : March 29 2020, 07:55 AM
Hope this helps Estimating how long something like that might take is dependent on many different factors. For example, an experienced programmer can easily knock out a simple arithmetic expression evaluator in a couple of hours, with unit tests. But a novice programmer may have to learn about parsing techniques, recursive descent, abstract representation of expression trees, tree-walking strategies, and so on. This could easily take weeks or more, just for arithmetic expressions.
However, don't let that discourage you. As Jeff and Joel were discussing with Eric Sink on a recent Stack Overflow podcast, writing a compiler is an excellent way to learn about many different aspects of programming. I've built a few compilers and they are among my most memorable programming projects.

need suggestions on getting started with Junit

By : user1550209
Date : March 29 2020, 07:55 AM
this one helps. I have not used Junit before and have not done unit testing automatically. , You'll write a test class.
code :
public class OracleMatchesSqlServer extends TestCase {
    public void testHeadIdentifiersShouldBeEqual() throws Exception {
        String head = "whatever your head should be";
        IdentifierBean originalBean = YourClass.getHeadIdentifiers_old(head);
        IdentifierBean oracleBean = YourClass.getHeadIdentifiers(head);
        assertEquals(originalBean, oracleBean);
public class OracleMatchesSqlServer extends TestCase {
    public void testHeadIdentifiersShouldBeEqual() throws Exception {
    private static void compareIdentifiersWithHead(String head) {
        IdentifierBean originalBean = YourClass.getHeadIdentifiers_old(head);
        IdentifierBean oracleBean = YourClass.getHeadIdentifiers(head);
        assertEquals(originalBean, oracleBean);
* Is this a good approach?
* I will have multiple DAOs. Do I write the test methods inside the DAO
  itself or for each DAO I should have a separate JUnit Test Class?
* (might be n00b question) will all the test cases be run automatically?
  I do not want to go to the front end click bunch of stuff so that call
  to the DAO gets triggered.
* when tests are ran will I find out which methods failed? 
  and for the ones failed will it tell me the test method that failed?
* lastly, any good starting points? any tutorials, articles that
  show working with Junit

Need suggestions for writing an optimized SQL query

By : Mário Sliepoi Rutman
Date : March 29 2020, 07:55 AM
wish helps you I am trying to frame an SQL in informix /Postgres.
code :
  JOIN JobType AS jt
    ON jt.id = j.type_id
WHERE jt.code = 'CRT'
      ( SELECT 1
        FROM Job AS p
          JOIN JobType AS pjt
            ON pjt.id = p.type_id 
        WHERE p.user_description = pjt.description || '-' || j.user_description
          AND pjt.code LIKE 'PST%'
      ) ;

Doubts and suggestions about JUnit

By : SungHyuk Choi
Date : March 29 2020, 07:55 AM
will be helpful for those in need Writing a unit test is easy in JUnit4: Write some small methods that use your code, and use JUnit assertions to ensure that your code produces the answers you're expecting.
code :
@RunWith(JUnit4.class) // JUnit4.class is a "runner".
public class BinarySearchTest {
  // By convention, the test for class Foo is named FooTest. You can name the
  // test anything you'd like, though, especially if you split your test for
  // Foo into more than one file.

  @Test public void isSortedShouldReturnTrueWhenSorted() { // Same with methods.
    assertTrue(BinarySearch.isSorted(new int[] { 2, 4, 6 }));

  @Test public void isSortedShouldReturnFalseWhenUnsorted() {
    assertFalse(BinarySearch.isSorted(new int[] { 4, 2, 6 }));

  @Test public void isSortedShouldReturnTrueWhenEmpty() {
    assertTrue(BinarySearch.isSorted(new int[] {}));

  // Write more tests here!
java -cp /usr/share/java/junit.jar org.junit.runner.JUnitCore your.package.BinarySearchTest
#    ^ classpath includes JUnit    ^ you're running JUnitCore ^ on your test class

Powermock JUnit tests are taking more time to execute compared to normal JUnit

By : Ted Henderson
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , PowerMock is a tool that performs bytecode instrumentation on your generated classes. Once your classes are compiled into Java Bytecode, PowerMock comes along and modifies this generated classes. It is not possible otherwise (by using Java Proxy) to mock a private or a static method.
You should only use @PrepareForTest annotation only in those classes that you want to use features exclusive to PowerMock, such as mocking private or static methods.
Related Posts Related Posts :
  • IMB PCF agent returns error while inquiring channel status
  • Java EE 7 batch API (JSR-352): it's possible to stop a single step and not all the job?
  • Java multithread example - is object shared or not
  • Why String's replaceAll() method come at high performance cost at the first time and faster at the next time?
  • Lua script coverts empty array to object
  • Doesn't Access to external storage in API-29
  • How to add a button to the Android system navigation bar?
  • If inside for-each-loop to Stream
  • Shift array to the right by one slot
  • How to setup a Java development environment for Z3
  • how to make notify() works properly with wait()
  • IllegalFormatConversionException d != java.lang.Integer when trying to printf date?
  • Duplicate logic in backend and frontend with Domain Driven Design
  • How would I randomize an int[][]?
  • StringDate to Date coming in different Time in SimpleDateFormat in java
  • Get content uri from file path in android for video
  • function param issue in Scala 11, works in Scala 12 using resilience4j
  • Android unit testing : calling a method from fragment which uses context
  • How to remove E notation from Double value
  • Check if input is any of the values in an array
  • DateTimeParseException - could not be parsed at index 0
  • How to make a Java HTTP async request?
  • Make Javafx/Scenebuilder recognize tagged fields and methods when splitting the MainController into multiple files?
  • Why does this time fail to be parsed by DateTimeFormatter.ofPattern()?
  • Java - Merge objects of list given a condition
  • How to know if arraylist contains value in property of object?
  • Java modelling class if objects have same properties but they are fundamentally different
  • False Positive and False Negative
  • Java UnknownFormatConversionException = ','
  • Apache POI recording only 1 row in the spreadsheet
  • Getting Constructor from Java Class that would be called for argument types, not requiring exact argument & paramete
  • @JsonIgnore with Conditions
  • Does synchronizing on the static field that you are modifying make your code thread safe?
  • Compiler errors while trying to make a pop up
  • Trying to take two timestamps, subtract them, convert the difference to seconds and store in an int variable
  • How can I use Optionals instead of nested if statement?
  • How do I compare values in parallel arrays to eliminate duplicates?
  • make a method which returns the number of one digit numbers in an array
  • Does calling multiple times save() method of hibernate with same object insert new record in DB?
  • Single Number solving by Haspmap, return always be a "@"
  • What do you do about the JLabel classes? It says, "JLabel not a statement" for the error
  • Functional Interface call for a new Instance
  • When I tried to add ArrayList into ArrayList second ArrayList is repeating
  • How can I print the longest word from a user defined list?
  • enabling authentication in ignite
  • Providing OSGi Service Without Implementing Interface
  • Read manifest from JAR with gradle
  • Create one element Set the same way (if applicable) as create single element list
  • pass by reference an integer in java
  • how to generate the POI excel file in a specific location?
  • Issue trying to create a Bubble Sort using ArrayList<Integer>
  • How can I avoid typechecking in this situation
  • How to create a map<k,v> between first and last nested object using Java streams?
  • what is the best solution to split in chunk monthly given two dates startTime and EndTime in Java?
  • View Binding causes "The specified child already has a parent"
  • parse float in java with trailing junk
  • How to convert color from ColorPicker to String value in javaFX
  • Spring test integration not run how I deal with this error?
  • Java 8 Streams : Count the occurrence of elements(List<String> list1) from list of text data(List<String> li
  • What is the difference between static and protected in java?
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org