On: Fantastic DSLs and where to find them

[vorg]

You are two users each talking about your team to promote a framework. I'll take some actual time to look at some code from the sole link here, which is the website:

  class DataDriven extends Specification {
      def "maximum of two numbers"() {
          expect:
          Math.max(a, b) == c

          where:
          a | b || c
          3 | 5 || 5
          7 | 0 || 7
          0 | 0 || 0
      }
  }

I see here a DSL that

* defines blocks without curlies by overloading the C-style label syntax normally used for break targets

* overloads the | and || operators to build tables of data without quotes around it

* uses strings as function names instead of camelCase

The Apache Groovy DSL enables that by having a complex grammar and intercepting the AST during the compile. Clojure, also for the JVM, has a simple grammar and provides macros, which are convenient for eliminating syntax in repetitive tests. I switched from Groovy 1.x to Clojure years ago for testing on the JVM.

[cle → vorg]

In a team/company using Java, Groovy is a relatively easy sell compared to Clojure.

(I love Clojure and would much rather use it than Groovy.)

[brabel → vorg]

Show me the code, please?