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Use istanbul test coverage on koa
Recently, I wrote some koa middlewares: koa-gzip, koa-fresh, and I want to do test coverage with my favorite module: blanket.
But blanket broken #393
$ m cov
/Users/mk2/git/koa-gzip/node_modules/blanket/node_modules/esprima/esprima.js:3872
throw e;
^
Error: Line 27: Unexpected token *
at throwError (/Users/mk2/git/koa-gzip/node_modules/blanket/node_modules/esprima/esprima.js:1156:21)
at throwUnexpected (/Users/mk2/git/koa-gzip/node_modules/blanket/node_modules/esprima/esprima.js:1213:9)
Is esprima not work?
First, I think esprima not support es6. But I search on github found #87 it’s already support es6 now.
istanbul I found
I search ‘coverage’ on npm, istanbul just come out.
There are some articles about makr istanbul work with mocha:
Change blanket to istanbul
All diffs: koa-gzip#9af6
package.json: MUST use istanbul harmony branch
"devDependencies": {
"autod": "*",
"contributors": "*",
"istanbul": "git://github.com/gotwarlost/istanbul.git#harmony",
"koa": "0.5.0",
"mm": "0.2.0",
"mocha": "*",
"should": "3.1.3",
"supertest": "0.9.0"
}
Makefile:
install:
[@npm](/user/npm) install --registry=http://r.cnpmjs.org --cache=${HOME}/.npm/.cache/cnpm
test: install
[@NODE_ENV](/user/NODE_ENV)=test node --harmony \
node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha \
-- -u exports \
--reporter $(REPORTER) \
--timeout $(TIMEOUT) \
$(MOCHA_OPTS) \
$(TESTS)
stdout:
$ mt
index.test.js
gzip()
✓ should work with no options
when status 200 and request accept-encoding include gzip
✓ should return gzip string body (39ms)
✓ should return raw string body if body smaller than minLength
✓ should return raw string body if gzip body bigger than raw body
✓ should return gzip buffer body
✓ should return gzip stream body
✓ should return gzip json body
✓ should return number body
when status 200 and request accept-encoding exclude gzip
✓ should return raw body
when status non 200
✓ should return 404
✓ should return 500
11 passing (117ms)
=============================================================================
Writing coverage object [/Users/mk2/git/koa-gzip/coverage/coverage.json]
Writing coverage reports at [/Users/mk2/git/koa-gzip/coverage]
=============================================================================
=============================== Coverage summary ===============================
Statements : 100% ( 26/26 )
Branches : 100% ( 19/19 )
Functions : 100% ( 2/2 )
Lines : 100% ( 26/26 )
================================================================================
istanbul is awesome! I run once tests, got all reports.
There is no more $ make test-cov.
Write for love
Hope this article make your coding life better and more fun.