The feature is now available. You simply need to apply the Gradle JaCoCo plugin and define coverage verification like this: apply plugin: ‘jacoco’ jacocoTestCoverageVerification { violationRules { rule { limit { minimum = 0.7 } } } } // to run coverage verification during the build (and fail when appropriate) check.dependsOn jacocoTestCoverageVerification The last line … Read more
IntelliJ IDEA has a quite decent support for refactoring of groovy code. It also has a source code level converter from Groovy -> Java. Most of the time it generates code that does not compile, but it may help to get you started with the process of converting the code. Groovy code: class HelloWorld { … Read more
System.properties[‘os.name’] will return the name of the OS, e.g. “Windows XP”. So if you want to figure out whether you’re running on Windows or not, you could do something like: if (System.properties[‘os.name’].toLowerCase().contains(‘windows’)) { println “it’s Windows” } else { println “it’s not Windows” } Alternatively, org.apache.commons.lang.SystemUtils (from the Apache commons-lang project) exposes some boolean constants … Read more
An assertion is similar to an if, it verifies the expression you provide: if the expression is true it continues the execution to the next statement (and prints nothing), if the expression is false, it raises an AssertionError. You can customize the error message providing a message separated by a colon like this: assert 4 … Read more
A lot of the comments for duck typing don’t really substantiate the claims. Not “having to worry” about a type is not sustainable for maintenance or making an application extendable. I’ve really had a good opportunity to see Grails in action over my last contract and its quite funny to watch really. Everyone is happy … Read more
Same as in Java: def str2 = str1.replaceAll(‘\\)’,’ ‘) You have to escape the backslash (with another backslash).
Use join, e.g., tripIds.join(“, “) Tangential If you want to create a list from another list you generally want something like map or collect as opposed to manually creating a list and appending to it, e.g. (untested): def sql = Sql.newInstance(“jdbc:mysql://localhost:3306/steer”, “root”, “”, “com.mysql.jdbc.Driver”) def tripIds = sql.map { it.id } Or if you only … Read more
Groovy provides the inspect() method returns an object as a parseable string: // serialize def m = [a: 123, b: ‘test’] def str = m.inspect() // deserialize m = Eval.me(str) Another way to serialize a groovy map as a readable string is with JSON: // serialize import groovy.json.JsonBuilder def m = [a: 123, b: ‘test’] … Read more
EDIT As of groovy 1.8.6 you can use the collate method on lists def origList = [1, 2, 3, 4, 5, 6, 7, 8, 9] assert [[1, 2, 3, 4], [5, 6, 7, 8], [9]] == origList.collate(4) Another method using inject and metaClasses List.metaClass.partition = { size -> def rslt = delegate.inject( [ [] ] … Read more