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Asked: 2 years agoIn:
Begginer

I’m trying to run CTS and VTS test plans, but I’m not sure what are the correct commands to execute. I have a basic understanding of Android app development and I’m familiar with running unit tests and instrumentation tests, but ...Read more

I’m trying to run CTS and VTS test plans, but I’m not sure what are the correct commands to execute. I have a basic understanding of Android app development and I’m familiar with running unit tests and instrumentation tests, but I don’t have much experience with CTS and VTS.
I have downloaded the Android Open Source Project code and followed the instructions to set up the environment. I have also gone through the documentation and found some information about CTS and VTS, but I’m still confused about how to run them. I have tried running “cts-tradefed” and “vts-tradefed” commands in the terminal, but I’m getting errors like “command not found”.
Can someone please guide me on how to run CTS and VTS test plans? Also, what are the prerequisites for running these tests? Do I need any special hardware or software? Any help would be appreciated. Thank you in advance.

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androidandroid-vtscommand-linectstesting
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Asked: 2 years agoIn:
Teacher

I have been working on a Java program which reads some integers from a file and performs some operations on them. I was trying to use Java 8 Optional to prevent NullPointerExceptions and improve my code’s readability. However, I came ...Read more

I have been working on a Java program which reads some integers from a file and performs some operations on them. I was trying to use Java 8 Optional to prevent NullPointerExceptions and improve my code’s readability. However, I came across an error while using the Optional.get() method. The error message I received was “java.util.NoSuchElementException: No value present”.

Here’s how I used the Optional.get() method in my code:

Optional num = // read some integer from file
// perform some operations
int result = num.get() * 2;

This code threw the “java.util.NoSuchElementException: No value present” error at the line where I called the num.get() method. I am not sure what I did wrong, as I have seen examples of using Optional.get() in similar ways. Can someone please explain what’s wrong with my code? Also, is there a way to handle this error more gracefully, for example by returning a default value?

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javaJUnitNoSuchElementExceptionoptionaltesting
  1. marija_nizek242

    It is possible that the NoSuchElementException is occurring because Optional is expecting a value to be present, but there isn't one. One way to handle this case is to use the isPresent() method to check if a value is present before calling get(). For example: Optional optionalMyObject = getMyObjectRead more

    It is possible that the NoSuchElementException is occurring because Optional is expecting a value to be present, but there isn’t one. One way to handle this case is to use the isPresent() method to check if a value is present before calling get().

    For example:

    Optional optionalMyObject = getMyObjectSomehow();
    if (optionalMyObject.isPresent()) {
    MyObject myObject = optionalMyObject.get();
    // Do something with myObject
    } else {
    // Handle case where value is not present
    }

    Using this approach ensures that get() is only called when a value is present, helping to avoid the NoSuchElementException.

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Asked: 3 years agoIn:
Begginer

I am a junior developer working on a project that requires me to run specific tests using Gradle through the command line interface. I have tried executing the command ‘gradle test –tests *TestClassName*’ but it does not seem to work. ...Read more

I am a junior developer working on a project that requires me to run specific tests using Gradle through the command line interface. I have tried executing the command ‘gradle test –tests *TestClassName*’ but it does not seem to work. Instead of running the specified tests, it runs all the tests in the project. I have checked the syntax and I am certain that I have written the command correctly.
I also tried adding the command ‘testClasses.dependsOn ‘createMockData” because I thought that the problem could be that the mock data is not getting created before the tests are run. But this didn’t work either. I am at a loss as to what is causing the issue. I have considered the possibility that my Gradle version may be outdated, but I am not sure if that is the case. I need someone to guide me through the proper way to run specific tests using Gradle from the command line.
Can anyone help me by showing me the correct syntax to use or any flags that are needed to be added to the Gradle command? I have provided a snippet of my code below.
plugins {
id 'java'
}
repositories {
mavenCentral()
}
dependencies {
testImplementation 'junit:junit:4.13.1'
}
test {
useJUnitPlatform()
}

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command-lineexecutiongradlespecific-teststesting
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