add tests for processorFilter

Author: zoubin

test/processorFilter.js

@@ -0,0 +1,95 @@
+var postcss = require('postcss')
+var reducePostcss = require('..')
+var reduce = require('reduce-css')
+var test = require('tape')
+var compare = require('compare-directory')
+var del = require('del')
+var path = require('path')
+
+var fixtures = path.resolve.bind(path, __dirname, 'fixtures')
+var DEST = fixtures('build')
+
+test('processorFilter, Function', function(t) {
+  t.task(clean)
+  t.task(function () {
+    return bundle(
+      t,
+      {
+        basedir: fixtures('src'),
+        factor: 'common.css',
+      },
+      DEST,
+      null,
+      {
+        maxSize: 0,
+        assetOutFolder: fixtures('build', 'images'),
+      }
+    )
+  })
+  t.task(function () {
+    compare(t, ['**/*.css', '**/*.png'], DEST, fixtures('expected', 'single-bundle'))
+  })
+
+  function bundle(t, ropts, dest, outOpts, urlOpts) {
+    return reduce
+      .on('error', console.log.bind(console))
+      .on('instance', function (b) {
+        b.plugin(reducePostcss, {
+          processorFilter: function (pipeline) {
+            pipeline.push(postcss.plugin('A', function () {
+              return function () {
+                t.ok(true)
+              }
+            }))
+          },
+        })
+      })
+      .src('*.css', ropts)
+      .pipe(reduce.dest(dest, outOpts, urlOpts))
+  }
+
+})
+
+test('processorFilter, Array', function(t) {
+  t.task(clean)
+  t.task(function () {
+    return bundle(
+      t,
+      {
+        basedir: fixtures('src'),
+        factor: 'common.css',
+      },
+      DEST,
+      null,
+      {
+        maxSize: 0,
+        assetOutFolder: fixtures('build', 'images'),
+      }
+    )
+  })
+  t.task(function () {
+    compare(t, ['**/*.css', '**/*.png'], DEST, fixtures('expected', 'single-bundle'))
+  })
+
+  function bundle(t, ropts, dest, outOpts, urlOpts) {
+    return reduce
+      .on('error', console.log.bind(console))
+      .on('instance', function (b) {
+        b.plugin(reducePostcss, {
+          processorFilter: [postcss.plugin('A', function () {
+            return function () {
+              t.ok(true)
+            }
+          })],
+        })
+      })
+      .src('*.css', ropts)
+      .pipe(reduce.dest(dest, outOpts, urlOpts))
+  }
+
+})
+
+function clean() {
+  return del(DEST)
+}
+