Null Pointer Exception while integrating swagger coverage with karate framework

[dtk72]

I'm submitting a ...

• bug report

Error when running mvn clean test

java.lang.NullPointerException: Cannot invoke "java.nio.file.attribute.FileTime.toInstant()" because "this.minResultTime" is null

If the current behavior is a bug, please provide steps to reproduce, broken swagger specification and swagger-coverage-output:

Followed this code example provided in the README to generate a swagger coverage report after running karate tests for my own API:

import java.net.URI;
import com.github.viclovsky.swagger.coverage.karate.SwaggerCoverageRunner;
import com.intuit.karate.Results;
import org.junit.jupiter.api.Test;

public class CoverageReportRunner {

    @Test
    void testAll(){
        Results results = SwaggerCoverageRunner.path("classpath:some/path")
                .coverageDir("api-test-coverage")
                .swaggerSpec(URI.create("https://petstore3.swagger.io/api/v3/openapi.json"))
                .oas3()
                .outputJunitXml(true)
                .karateEnv("dev")
                .parallel(1);
    }
}

The error seems to arise when the code reaches .parallel(1)

Other information

• The swaggerSpec() is passed a path to the .yaml file instead of a URL
• The Coverage directory and naming conventions are followed appropriately, dependencies are added (Maven), and Java 16 and Junit5 are being used.

[Fresh-D101]

Hey!
Could you please provide the full call stack for the error?

[dtk72]

Hi! For sure,

java.lang.NullPointerException: Cannot invoke "java.nio.file.attribute.FileTime.toInstant()" because "this.minResultTime" is null
 at com.github.viclovsky.swagger.coverage.core.results.builder.prebuilder.GenerationStatisticsBuilder.build([GenerationStatisticsBuilder.java:60]
 at com.github.viclovsky.swagger.coverage.core.generator.Generator.lambda$run$1([Generator.java:49]
 at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept([ForEachOps.java:183]
 at java.base/java.util.stream.ReferencePipeline$2$1.accept([ReferencePipeline.java:179]
 at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining([ArrayList.java:1625]
 at java.base/java.util.stream.AbstractPipeline.copyInto([AbstractPipeline.java:484]
 at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto([AbstractPipeline.java:474]
 at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential([ForEachOps.java:150]
 at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential([ForEachOps.java:173]
 at java.base/java.util.stream.AbstractPipeline.evaluate([AbstractPipeline.java:234]
 at java.base/java.util.stream.ReferencePipeline.forEach([ReferencePipeline.java:596]
 at com.github.viclovsky.swagger.coverage.core.generator.Generator.run([Generator.java:48]
 at com.github.viclovsky.swagger.coverage.karate.SwaggerCoverageRunner$SwaggerCoverageBuilder.generateReport([SwaggerCoverageRunner.java:126]
 at com.github.viclovsky.swagger.coverage.karate.SwaggerCoverageRunner$SwaggerCoverageBuilder.parallel([SwaggerCoverageRunner.java:163]
 at TestRunner.testAll([TestRunner.java:16]
 at java.base/java.util.ArrayList.forEach([ArrayList.java:1511]
 at java.base/java.util.ArrayList.forEach([ArrayList.java:1511]

[Fresh-D101]

Hey, sorry for the late response, I'm super busy atm. I had a quick look at it, and I think I know what could be going on. Can you maybe share the log file?

[dtk72]

No worries, I've attached the file:
log4j.log

[tsbirch]

Hi, I've recently bumped into this same issue and would really like to try this module to check swagger coverage with Karate. Do you have any updates on this? Thank you!

[Fresh-D101]

Hey guys, sorry I haven't gotten back to you on this issue. Can you also provide me with your log4j.log file and ideally a small reproduction project? I will try to take a look at this asap!

[tsbirch]

Hi, sorry I hadn't come back to this issue. I managed to prepare a small reproduction project (which I've attached), but wasn't able at first to get the error above.

I was finally able to reproduce the null pointer exception, but only if I change protocol to https in karate-config.js when the proxy is used (which is wrong):

if (karate.properties['proxy.port']){ console.log("Proxy server is used"); protocol = "https"; }

My main problem, though, is I'm not able to run tests using the proxy with https endpoints. I tried the workaround described here:

https://github.com/viclovsky/swagger-coverage/blob/master/swagger-coverage-karate/README.md#-the-problem-with-https-and-the-workaround

but with no success. Is it possible to work with https while using the proxy to measure swagger coverage?

Thanks again!
myproject.zip

[tdeverdiere]

I 've got the same error and same stack than the one from @dtk72 when i upgrade version of karate 1.4.1 and other libraries:

Update karate version to 1.4.1

Update jackson to 2.5.13 to be compatible

Update other libraries:
- armeria 1.26.4
- classgraph 4.8.165
- netty 4.1.104
- thymeleaf 3.1.2.RELEASE
- wiremock 2.27.2

https://github.com/tdeverdiere/swagger-coverage/tree/update-karate

Error : "java.lang.NullPointerException: Cannot invoke "java.nio.file.attribute.FileTime.toInstant()" because "this.minResultTime" is null"

[anneChen8888]

I got same issue, karate version is 1.4.0, swagger-coverage version is 1.5.0

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.nio.file.attribute.FileTime.toInstant()" because "this.minResultTime" is null
        at com.github.viclovsky.swagger.coverage.core.results.builder.prebuilder.GenerationStatisticsBuilder.build(GenerationStatisticsBuilder.java:60)
        at com.github.viclovsky.swagger.coverage.core.generator.Generator.lambda$run$1(Generator.java:49)
        at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
        at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
        at com.github.viclovsky.swagger.coverage.core.generator.Generator.run(Generator.java:48)
        at com.github.viclovsky.swagger.coverage.CommandLine.run(CommandLine.java:77)
        at java.base/java.util.Optional.orElseGet(Optional.java:362)
        at com.github.viclovsky.swagger.coverage.CommandLine.main(CommandLine.java:34)

[anneChen8888]

I 've got the same error and same stack than the one from @dtk72 when i upgrade version of karate 1.4.1 and other libraries:

Update karate version to 1.4.1

Update jackson to 2.5.13 to be compatible

Update other libraries:
- armeria 1.26.4
- classgraph 4.8.165
- netty 4.1.104
- thymeleaf 3.1.2.RELEASE
- wiremock 2.27.2

https://github.com/tdeverdiere/swagger-coverage/tree/update-karate

Error : "java.lang.NullPointerException: Cannot invoke "java.nio.file.attribute.FileTime.toInstant()" because "this.minResultTime" is null"

Is the issue fixed on your side?

[tdeverdiere]

Hello
No so i created an implementation of a Karate RuntimeHook: SwaggerCoverageRuntimeHook
And use it in the Runner configuration:

        Results results = Runner.path("classpath:...")
                .outputCucumberJson(true)
                .outputJunitXml(true)
                .hook(new SwaggerCoverageRuntimeHook("target", "target/test-classes/swagger-coverage-config.json"))
                .reportDir(karateOutputPath)
                .parallel(1);

To write SwaggerCoverageRuntimeHook i mostly use the code from swagger-coverage-karate: SwaggerCoverageRunner#generateReport
And i copy also the all class Generator from swagger-coverage-commandline/src/main/java/com/github/viclovsky/swagger/coverage/core/generator/Generator.java

I could give you the all code in my repo if you want

[kwokfu]

This looks like related to karatelabs/karate#2048

[kondababubalam]

can you share repo @tdeverdiere

[rc2201]

@tdeverdiere can you share the repo or provide any pointers on how to integrate this tool into Karate Runner? Thanks