Refactor tests to use mochas string diffing

remarkjs · Jun 21, 2015 · 81a288a · 81a288a
1 parent 042a7fe
commit 81a288a
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Showing 2 changed files with 23 additions and 24 deletions.
diff --git a/package.json b/package.json
@@ -34,8 +34,6 @@
   },
   "devDependencies": {
     "browserify": "^10.0.0",
-    "chalk": "^1.0.0",
-    "diff": "^1.2.2",
     "eslint": "^0.23.0",
     "esmangle": "^1.0.0",
     "istanbul": "^0.3.0",

diff --git a/test/index.js b/test/index.js
@@ -11,8 +11,6 @@ var mdast = require('mdast');
 var assert = require('assert');
 var fs = require('fs');
 var path = require('path');
-var diff = require('diff');
-var chalk = require('chalk');
 
 /*
  * Methods.
@@ -21,7 +19,6 @@ var chalk = require('chalk');
 var read = fs.readFileSync;
 var exists = fs.existsSync;
 var join = path.join;
-var stderr = global.process.stderr;
 
 /*
  * Constants.
@@ -45,6 +42,24 @@ function process(value, config) {
     return mdast().use(toc, config).process(value);
 }
 
+/**
+ * Assert two strings.
+ *
+ * @param {string} actual
+ * @param {string} expected
+ * @throws {Error} - When not equal.
+ */
+function assertion(actual, expected) {
+    try {
+        assert(actual === expected);
+    } catch (exception) {
+        exception.expected = expected;
+        exception.actual = actual;
+
+        throw exception;
+    }
+}
+
 /*
  * Tests.
  */
@@ -81,9 +96,9 @@ describe('mdast-toc()', function () {
             ''
         ].join('\n');
 
-        assert(process(input, {
+        assertion(process(input, {
             'library': require('to-slug-case')
-        }) === output);
+        }), output);
     });
 
     it('should accept `library` as a file', function () {
@@ -107,9 +122,9 @@ describe('mdast-toc()', function () {
             ''
         ].join('\n');
 
-        assert(process(input, {
+        assertion(process(input, {
             'library': 'node_modules/to-slug-case/index'
-        }) === output);
+        }), output);
     });
 
     it('should add `attributes.id` to headings', function () {
@@ -169,25 +184,11 @@ function describeFixture(fixture) {
         var input = read(join(filepath, 'input.md'), 'utf-8');
         var config = join(filepath, 'config.json');
         var result;
-        var difference;
 
         config = exists(config) ? JSON.parse(read(config, 'utf-8')) : {};
         result = process(input, config);
 
-        try {
-            assert(result === output);
-        } catch (exception) {
-            difference = diff.diffLines(output, result);
-
-            difference.forEach(function (change) {
-                var colour = change.added ?
-                    'green' : change.removed ? 'red' : 'dim';
-
-                stderr.write(chalk[colour](change.value));
-            });
-
-            throw exception;
-        }
+        assertion(result, output);
     });
 }