Spock Framework: spying issues

Question

I have a problem using Spy in Spock, it either does not work as it should, or my understanding is wrong, so I'm trying to clarify this. Consider this code (Java):

public class CallingClass { public String functionOne() { //does stuff return "one"; } public String functionTwo() { String one = functionOne(); return "some string " + one; } } 

Now I want to check that functionTwo calls functionOne , and also determine the return value from functionOne (imagine, for example, if functionOne really complex and I don’t want to execute it, my test just wants to mute it and set it to return a certain value). To do this, write the following test in Groovy (using Spock):

 class CallingClassTest extends Specification { def "check that functionTwo calls functionOne"() { def c = Spy(CallingClass) c.functionOne() >> "mocked function return" when: def s = c.functionTwo() then: 1 * c.functionOne() s == "some string mocked function return" } } 

To do something like this, Spock asks me to have a cglib library, so my build file (in Gradle) looks something like this:

 apply plugin: 'groovy' repositories { mavenCentral() } dependencies { compile 'org.codehaus.groovy:groovy:latest.release' testCompile 'org.spockframework:spock-core:latest.release' testCompile 'junit:junit:latest.release' testCompile 'cglib:cglib-nodep:latest.release' } 

Now, when I run the test, I expect that functionOne will not be called at all, and instead my corrected version will be used. Instead, I get the following:

 Condition not satisfied: s == "some string mocked function return" | | | false | 19 differences (44% similarity) | some string (-)o(-------)n(-------)e(----) | some string (m)o(cked fu)n(ction r)e(turn) some string one Condition not satisfied: s == "some string mocked function return" | | | false | 19 differences (44% similarity) | some string (-)o(-------)n(-------)e(----) | some string (m)o(cked fu)n(ction r)e(turn) some string one at CallingClassTest.check that functionTwo calls functionOne(CallingClassTest.groovy:17) 

Moreover, if I debug this and set a breakpoint in functionOne , it gets a call: (

What am I missing? Shouldn't my test use a functionOne stub and just return the string "mocked function return" ?

Answer 1

It should be:

 @Grab('org.spockframework:spock-core:0.7-groovy-2.0') @Grab('cglib:cglib-nodep:3.1') import spock.lang.* class CallingClassTest extends Specification { def "check that functionTwo calls functionOne"() { def c = Spy(CallingClass) when: def s = c.functionTwo() then: 1 * c.functionOne() >> "mocked function return" s == "some string mocked function return" } } public class CallingClass { public String functionOne() { "one" } public String functionTwo() { String one = functionOne() "some string $one" } } 

When you both check / check and check how the return value should be indicated.