Unit testing for domain classes using Grails - unit-testing

Question

Currently searching for tutorials, explanations and examples.
I've tried different examples and came up to different errors.
My current error is :
| Error Compilation error compiling [unit] tests: startup failed:
and in my test reports. It outputs this :
Unit Test Results - Summary
No tests executed.
My "UserSpec.groovy" code is this :
package newmyproject245
import grails.test.mixin.*
import spock.lang.Specification
#TestFor(User)
class UserSpec extends ConstraintSpecification {
def setup() {
Expectations.applyTo User
}
def cleanup() {
}
void testShouldDoNothing() {
Expectations.applyTo User
user."password is not blank"
user."password is not nullable"
user."name is not blank"
user."name is not nullable"
}
void testEventNameConstraints() {
Expectations.applyTo User
def user = new User()
user."name is not blank"
user."name is not nullable"
}
}
Can anybody help. I'm new in grails.
Thanks!
Additional to the above problem,
when I omitted the Contraints in class as shown :
class UserSpec extends Specification {
I came up to this error :
| Running 1 unit test... 1 of 1
| Failure: initializationError(org.junit.runner.manipulation.Filter)
| java.lang.Exception: No tests found matching grails test target
pattern filter from org.junit.runner.Request$1#12c27788
at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:35)
at org.junit.runner.JUnitCore.run(JUnitCore.java:138)
| Completed 1 unit test, 1 failed in 0m 0s
| Error Fatal error running tests: Not-null property references a transient value - transient instance must be saved before current operation : newmyproject245.Order.product -> newmyproject245.Product; nested exception is org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : newmyproject245.Order.product -> newmyproject245.Product (Use --stacktrace to see the full trace)
someone help. Again, Thanks!

Answer 1

I already got the answer. See code for reference :
UserSpec.groovy
package project101
import grails.test.mixin.TestMixin
import grails.test.mixin.support.GrailsUnitTestMixin
import spock.lang.Specification
/**
* See the API for {#link grails.test.mixin.support.GrailsUnitTestMixin} for usage instructions
*/
#TestMixin(GrailsUnitTestMixin)
#TestFor(User)
class UserSpec extends Specification {
def user
def setup() {
user = new User(firstName: 'FIRSTNAME', lastName: 'LASTNAME', address: 'Finland', username: 'user1', password: 'pass123', userType: 'ADMIN')
}
def cleanup() {
user = null
}
void "Test if User handles"() {
given:
setup()
when: "User field has null value"
user?.username = null
then: "Validation returns false"
user?.validate() == false
user?.errors?.hasFieldErrors('username') == true
}
}
And make sure that the dbCreate of the test environment is "create-drop" to avoid such errors. Found in DataSource.groovy
test {
dataSource {
pooled = true
dbCreate = "create-drop"
Regards,
Thanks! (^_~)