0.2.0 - Mid migration

web/node_modules/postcss-discard-overridden/src/__tests__/index.js

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+import fs from 'fs';
+import postcss from 'postcss';
+import test from 'ava';
+import {diffLines} from 'diff';
+import chalk from 'chalk';
+import plugin from '../';
+
+function getDiff (left, right) {
+    let msg = ['\n'];
+    diffLines(left, right).forEach(item => {
+        if (item.added || item.removed) {
+            let text = item.value
+                .replace('\n', '\u00b6\n')
+                .replace('\ufeff', '[[BOM]]');
+            msg.push(chalk[item.added ? 'green' : 'red'](text));
+        } else {
+            let value = item.value.replace('\ufeff', '[[BOM]]');
+            let lines = value.split('\n');
+
+            // max line count for each item
+            let keepLines = 6;
+            // lines to be omitted
+            let omitLines = lines.length - keepLines;
+            if (lines.length > keepLines) {
+                lines.splice(
+                    Math.floor(keepLines / 2),
+                    omitLines,
+                    chalk.gray('(...' + omitLines + ' lines omitted...)')
+                );
+            }
+            msg.concat(lines);
+        }
+    });
+    msg.push('\n');
+    return msg.map(line => '  ' + line).join('');
+}
+
+function read (file) {
+    return fs.readFileSync(__dirname + `/fixtures/${file}.css`, {encoding: 'utf-8'});
+}
+
+function exec (t, input) {
+    let output = read(`${input}.post`);
+    return postcss([ plugin() ]).process(read(input))
+        .then( result => {
+            if (result.css !== output) {
+                t.fail(getDiff(result.css, output));
+            }
+            t.deepEqual(result.warnings().length, 0);
+        });
+}
+
+test(
+    'Overridden @keyframes should be discarded correctly.',
+    exec,
+    'keyframes'
+);
+
+test(
+    'Overridden @counter-style should be discarded correctly.',
+    exec,
+    'counter-style'
+);