Spock - approximate comparisions





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I’ve been looking for the Spock equivalent of the following convenience method in JUnit whereby you can do “approximate” comparisons. Does anyone know if such a thing exists?



/**

 * Asserts that two doubles or floats are equal to within a positive delta.

 */

assertEquals(double expected, double actual, double delta)





grails junit spock







share|improve this question

























  • You may want to use Hamcrest matchers.

    – Jeff Scott Brown
    Nov 22 '18 at 15:49


















1















I’ve been looking for the Spock equivalent of the following convenience method in JUnit whereby you can do “approximate” comparisons. Does anyone know if such a thing exists?



/**

 * Asserts that two doubles or floats are equal to within a positive delta.

 */

assertEquals(double expected, double actual, double delta)





grails junit spock







share|improve this question

























  • You may want to use Hamcrest matchers.

    – Jeff Scott Brown
    Nov 22 '18 at 15:49














1












1








1








I’ve been looking for the Spock equivalent of the following convenience method in JUnit whereby you can do “approximate” comparisons. Does anyone know if such a thing exists?



/**

 * Asserts that two doubles or floats are equal to within a positive delta.

 */

assertEquals(double expected, double actual, double delta)





grails junit spock







share|improve this question
















I’ve been looking for the Spock equivalent of the following convenience method in JUnit whereby you can do “approximate” comparisons. Does anyone know if such a thing exists?



/**

 * Asserts that two doubles or floats are equal to within a positive delta.

 */

assertEquals(double expected, double actual, double delta)





grails junit spock




grails junit spock






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 22 '18 at 23:34









Dónal

124k156487753




124k156487753










asked Nov 22 '18 at 14:19









dredre

4981621




4981621













  • You may want to use Hamcrest matchers.

    – Jeff Scott Brown
    Nov 22 '18 at 15:49



















  • You may want to use Hamcrest matchers.

    – Jeff Scott Brown
    Nov 22 '18 at 15:49

















You may want to use Hamcrest matchers.

– Jeff Scott Brown
Nov 22 '18 at 15:49





You may want to use Hamcrest matchers.

– Jeff Scott Brown
Nov 22 '18 at 15:49












2 Answers
2






active

oldest

votes


















6














There is build in function for that, described in official docs:



when:

def x = computeValue()



then:

expect x, closeTo(42, 0.01)


Check the specs.






share|improve this answer
























  • This answers the question more specifically. Thanks @Michal_Szulc

    – dre
    Nov 23 '18 at 12:40











  • See also Spock release notes mentioning Hamcrest support here and there.

    – kriegaex
    Dec 20 '18 at 6:49





















1














I don't know if there's a Spock equivalent but it's easy to write your own



class Foo extends Specification {



  private boolean compareApproximately(Number expected, Number actual, Number delta) {

    Math.abs(expected - actual) <= delta

  }



  def "approximate test"() {

    expect:

    compareApproximately(4, 4.5, 1)

    !compareApproximately(4, 4.5, 0.1)

  }

}


In practice, you'd probably want to make compareApproximately reusable across specs by defining it in a trait, subclass of Specification, or a static method in a utility class.






share|improve this answer





















  • 1





    Ah.. the infamous Murtag! Indeed you are powerful. Internet points for you!!!

    – dre
    Nov 22 '18 at 16:27












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2 Answers
2






active

oldest

votes








2 Answers
2






active

oldest

votes









active

oldest

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active

oldest

votes









6














There is build in function for that, described in official docs:



when:

def x = computeValue()



then:

expect x, closeTo(42, 0.01)


Check the specs.






share|improve this answer
























  • This answers the question more specifically. Thanks @Michal_Szulc

    – dre
    Nov 23 '18 at 12:40











  • See also Spock release notes mentioning Hamcrest support here and there.

    – kriegaex
    Dec 20 '18 at 6:49


















6














There is build in function for that, described in official docs:



when:

def x = computeValue()



then:

expect x, closeTo(42, 0.01)


Check the specs.






share|improve this answer
























  • This answers the question more specifically. Thanks @Michal_Szulc

    – dre
    Nov 23 '18 at 12:40











  • See also Spock release notes mentioning Hamcrest support here and there.

    – kriegaex
    Dec 20 '18 at 6:49
















6












6








6







There is build in function for that, described in official docs:



when:

def x = computeValue()



then:

expect x, closeTo(42, 0.01)


Check the specs.






share|improve this answer













There is build in function for that, described in official docs:



when:

def x = computeValue()



then:

expect x, closeTo(42, 0.01)


Check the specs.







share|improve this answer












share|improve this answer



share|improve this answer










answered Nov 22 '18 at 20:33









Michal_SzulcMichal_Szulc

2,30832145




2,30832145













  • This answers the question more specifically. Thanks @Michal_Szulc

    – dre
    Nov 23 '18 at 12:40











  • See also Spock release notes mentioning Hamcrest support here and there.

    – kriegaex
    Dec 20 '18 at 6:49





















  • This answers the question more specifically. Thanks @Michal_Szulc

    – dre
    Nov 23 '18 at 12:40











  • See also Spock release notes mentioning Hamcrest support here and there.

    – kriegaex
    Dec 20 '18 at 6:49



















This answers the question more specifically. Thanks @Michal_Szulc

– dre
Nov 23 '18 at 12:40





This answers the question more specifically. Thanks @Michal_Szulc

– dre
Nov 23 '18 at 12:40













See also Spock release notes mentioning Hamcrest support here and there.

– kriegaex
Dec 20 '18 at 6:49







See also Spock release notes mentioning Hamcrest support here and there.

– kriegaex
Dec 20 '18 at 6:49















1














I don't know if there's a Spock equivalent but it's easy to write your own



class Foo extends Specification {



  private boolean compareApproximately(Number expected, Number actual, Number delta) {

    Math.abs(expected - actual) <= delta

  }



  def "approximate test"() {

    expect:

    compareApproximately(4, 4.5, 1)

    !compareApproximately(4, 4.5, 0.1)

  }

}


In practice, you'd probably want to make compareApproximately reusable across specs by defining it in a trait, subclass of Specification, or a static method in a utility class.






share|improve this answer





















  • 1





    Ah.. the infamous Murtag! Indeed you are powerful. Internet points for you!!!

    – dre
    Nov 22 '18 at 16:27
















1














I don't know if there's a Spock equivalent but it's easy to write your own



class Foo extends Specification {



  private boolean compareApproximately(Number expected, Number actual, Number delta) {

    Math.abs(expected - actual) <= delta

  }



  def "approximate test"() {

    expect:

    compareApproximately(4, 4.5, 1)

    !compareApproximately(4, 4.5, 0.1)

  }

}


In practice, you'd probably want to make compareApproximately reusable across specs by defining it in a trait, subclass of Specification, or a static method in a utility class.






share|improve this answer





















  • 1





    Ah.. the infamous Murtag! Indeed you are powerful. Internet points for you!!!

    – dre
    Nov 22 '18 at 16:27














1












1








1







I don't know if there's a Spock equivalent but it's easy to write your own



class Foo extends Specification {



  private boolean compareApproximately(Number expected, Number actual, Number delta) {

    Math.abs(expected - actual) <= delta

  }



  def "approximate test"() {

    expect:

    compareApproximately(4, 4.5, 1)

    !compareApproximately(4, 4.5, 0.1)

  }

}


In practice, you'd probably want to make compareApproximately reusable across specs by defining it in a trait, subclass of Specification, or a static method in a utility class.






share|improve this answer















I don't know if there's a Spock equivalent but it's easy to write your own



class Foo extends Specification {



  private boolean compareApproximately(Number expected, Number actual, Number delta) {

    Math.abs(expected - actual) <= delta

  }



  def "approximate test"() {

    expect:

    compareApproximately(4, 4.5, 1)

    !compareApproximately(4, 4.5, 0.1)

  }

}


In practice, you'd probably want to make compareApproximately reusable across specs by defining it in a trait, subclass of Specification, or a static method in a utility class.







share|improve this answer














share|improve this answer



share|improve this answer








edited Nov 22 '18 at 22:20

























answered Nov 22 '18 at 16:24









DónalDónal

124k156487753




124k156487753








  • 1





    Ah.. the infamous Murtag! Indeed you are powerful. Internet points for you!!!

    – dre
    Nov 22 '18 at 16:27














  • 1





    Ah.. the infamous Murtag! Indeed you are powerful. Internet points for you!!!

    – dre
    Nov 22 '18 at 16:27








1




1





Ah.. the infamous Murtag! Indeed you are powerful. Internet points for you!!!

– dre
Nov 22 '18 at 16:27





Ah.. the infamous Murtag! Indeed you are powerful. Internet points for you!!!

– dre
Nov 22 '18 at 16:27


















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