Could not create a cucumber expression for scenario step-CodePudding

I have run into a problem that my custom cucumber configuration works in the same test project, but doesn't work as a dependency in other test project

CustomTypeRegistry class:

public class CustomTypeRegistry {

    @ParameterType("customEx\\([0-9] \\)")
    public Integer custom(String original) {
        return new Random().nextInt();
    }
}

Java glue step:

@When("generate {custom} for test")
public void testStep(int randomNumber) {
    System.out.println(randomNumber);
}

Scenario step:

When generate customEx(5) for test

When I create tests in the same project where cucumber configurations are present this works perfectly.

When I pack project to a jar and add it as dependency to another test project it recognizes the step but in runtime I got the error:

17-11-2021 14:15:55.592 [main] ERROR io.cucumber.core.runtime.Runtime.log - Exception while executing pickle java.util.concurrent.ExecutionException: io.cucumber.core.exception.CucumberException: Could not create a cucumber expression for 'generate {custom} for test'. It appears you did not register a parameter type. at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191) at io.cucumber.core.runtime.Runtime.run(Runtime.java:93) at io.cucumber.core.cli.Main.run(Main.java:92) at io.cucumber.core.cli.Main.main(Main.java:34) Caused by: io.cucumber.core.exception.CucumberException: Could not create a cucumber expression for 'generate {custom} for test'. It appears you did not register a parameter type. at io.cucumber.core.stepexpression.StepExpressionFactory.registerTypeInConfiguration(StepExpressionFactory.java:101) at io.cucumber.core.stepexpression.StepExpressionFactory.crateExpression(StepExpressionFactory.java:95) at io.cucumber.core.stepexpression.StepExpressionFactory.createExpression(StepExpressionFactory.java:61) at io.cucumber.core.stepexpression.StepExpressionFactory.createExpression(StepExpressionFactory.java:49) at io.cucumber.core.runner.CachingGlue.lambda$prepareGlue$3(CachingGlue.java:244) at java.base/java.util.ArrayList.forEach(ArrayList.java:1540) at io.cucumber.core.runner.CachingGlue.prepareGlue(CachingGlue.java:243) at io.cucumber.core.runner.Runner.runPickle(Runner.java:68) at io.cucumber.core.runtime.Runtime.lambda$execute$5(Runtime.java:110) at io.cucumber.core.runtime.CucumberExecutionContext.runTestCase(CucumberExecutionContext.java:117) at io.cucumber.core.runtime.Runtime.lambda$execute$6(Runtime.java:110) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at io.cucumber.core.runtime.Runtime$SameThreadExecutorService.execute(Runtime.java:233) at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:118) at io.cucumber.core.runtime.Runtime.lambda$run$2(Runtime.java:86) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) at java.base/java.util.stream.SliceOps$1$1.accept(SliceOps.java:199) at java.base/java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1631) at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:127) at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:502) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:488) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) at io.cucumber.core.runtime.Runtime.run(Runtime.java:87) ... 2 common frames omitted Caused by: io.cucumber.cucumberexpressions.UndefinedParameterTypeException: Undefined parameter type {custom}. Please register a ParameterType for {custom}. at io.cucumber.cucumberexpressions.CucumberExpression.processParameters(CucumberExpression.java:103) at io.cucumber.cucumberexpressions.CucumberExpression.(CucumberExpression.java:35) at io.cucumber.cucumberexpressions.ExpressionFactory.createExpression(ExpressionFactory.java:34) at io.cucumber.core.stepexpression.StepExpressionFactory.crateExpression(StepExpressionFactory.java:88)

Cucumber version: 6.8.1

Build tool: Maven

What can cause the problem?

CodePudding user response：

The likely reason you can observe such behavior is that there is a thing called "glue path" that is basically a package where Cucumber looks up the code (including custom parameter definitions).

By default cucmber uses glue path taken as the package that contains your runner class. So I assume that when you were having your code in original project that condition was met.

But when you made a library and used it as a dependency in another project Cucumber stopped seeing that since conditions stopped being met.

You need to specify glue path manually like it is mentioned in cucumber docs

By default Cucumber-JVM will search in the package (or sub-packages) of the runner class. You can also tell Cucumber-JVM explicitly which packages (and sub-packages) to search, with:

 @CucumberOptions(glue = {"<package>", "<package>", "<etc>"})
 public class RunCucumberTest{}