Use stylelint-config-suitcss local to the preprocessor

If the user does not pass their own options then use the suit config
that is a dependency of the processor. This removes the need for
consumers to install it themselves

Author: simonsmith

lib/index.js

@@ -9,6 +9,7 @@ var postcss = require('postcss');
 var cssnano = require('cssnano');
 var reporter = require('postcss-reporter');
 var stylelint = require('stylelint');
+var stylelintConfigSuit = require('stylelint-config-suitcss');
 
 /**
  * Module export
@@ -128,7 +129,7 @@ function lintImportedFiles(options, css, filename) {
   var processor = postcss();
 
   if (options.lint) {
-    processor.use(stylelint(options.stylelint));
+    processor.use(stylelint(options.stylelint || stylelintConfigSuit));
   }
 
   processor

test/fixtures/stylelint.css

@@ -1,4 +1,3 @@
 .Component {
-  flex: 1;
-  box-sizing: content-box;
+    box-sizing: content-box;
 }

test/test.js

@@ -166,6 +166,24 @@ describe('suitcss', function() {
         ).to.be.fulfilled;
       });
 
+      it('should allow the config to be overidden', function() {
+        return expect(
+          suitcss('@import "./stylelint.css"', {
+            lint: true,
+            root: 'test/fixtures',
+            stylelint: {
+              extends: 'stylelint-config-suitcss',
+              rules: {
+                indentation: 4
+              }
+            },
+            'postcss-reporter': {
+              throwError: true
+            }
+          })
+        ).to.be.fulfilled;
+      });
+
       it('should throw an error if stylelint fails', function() {
         return expect(
           suitcss('@import "./stylelint.css"', {
@@ -332,7 +350,7 @@ describe('cli', function() {
   it('should output stylelint warnings', function(done) {
     exec('node bin/suitcss -i test/fixtures test/fixtures/stylelint-import.css test/fixtures/cli/output.css -l', function(err, stdout) {
       if (err) return done(err);
-      expect(stdout).to.contain('Expected "box-sizing" to come before "flex"');
+      expect(stdout).to.contain('Expected indentation of 2 spaces');
       done();
     });
   });