Keep your vows; Relationship with Node

Oaths can be beautiful. Alexis Sellier , who has gained fame for developing LESS (and less.js), is beginning to become an Open Source star, releasing Vows , a framework for developing on Node.JS, driven by asynchronous behavior.



If such a BDD specification we give to the input:

2. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
3. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
4. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
6. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
7. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
8. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
9. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
11. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
12. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
13. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
14. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
15. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
16. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
18. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
19. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
20. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
21. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
22. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
23. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
24. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
25. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
26. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it
27. // division-by-zero-test.js var vows = require ( 'vows' ) , assert = require ( 'assert' ) ; // Create a Test Suite vows. describe ( 'Division by Zero' ) . addBatch ( { 'when dividing a number by zero' : { topic : function ( ) { return 42 / 0 } , 'we get Infinity' : function ( topic ) { assert. equal ( topic , Infinity ) ; } } , 'but when dividing zero by zero' : { topic : function ( ) { return 0 / 0 } , 'we get a value which' : { 'is not a number' : function ( topic ) { assert. isNaN ( topic ) ; } , 'is not equal to itself' : function ( topic ) { assert. notEqual ( topic , topic ) ; } } } } ) . run ( ) ; // Run it

')
Then at the output we get a perfectly readable report:


With macros, we end up with a convenient DSL syntax, for example:

2. { 'GET /' : {
3. topic : api. get ( '/' ) ,
4. 'shoud respond with a 200 OK' : assertStatus ( 200 )
5. } ,
6. 'POST /' : {
7. topic : api. post ( '/' ) ,
8. 'shoud respond with a 405 Method not allowed' : assertStatus ( 405 )
9. } ,
10. 'GET / resources (no api-key)' : {
11. topic : api. get ( '/ resources' ) ,
12. 'shoud respond with a 403 Forbidden' : assertStatus ( 403 )
13. } ,
14. 'GET / resources? Apikey = af816e859c249fe'
15. topic : api. get ( '/ resources? apikey = af816e859c249fe' ) ,
16. 'shoud return a 200 OK' : assertStatus ( 200 ) ,
17. 'should return a list of resources' : function ( res ) {
18. assert. isArray ( res. body ) ;
19. }
20. }
21. }
22. // or even
23. {
24. 'GET /' : respondsWith ( 200 ) ,
25. 'POST /' : respondsWith ( 405 ) ,
26. 'GET / resources (no key)' : respondsWith ( 403 )
27. }

The project site details the installation process, usage examples, etc. By the way, the site was made very decently, using HTML5 markup.

from the translator: The name of the article in English beats the name of the project - Vows (oaths).