tests; cleanup compare test

alnafie · Aug 31, 2013 · f2b8428 · f2b8428
1 parent d21d6bf
commit f2b8428
Showing 1 changed file with 21 additions and 13 deletions.
diff --git a/test/compare.js b/test/compare.js
@@ -2,21 +2,29 @@ var assert = require('assert');
 var fs = require('fs');
 
 module.exports = function (gm, dir, finish, GM) {
+  // Same image
   GM.compare(dir + '/original.jpg', dir + '/original.png', function(err, same) {
-    if (err || !same) finish(err);
-    else outputDiff();
-  });
+    if (err) return finish(err);
+    if (!same) return finish(new Error('Compare should be the same!'));
 
-  function outputDiff() {
-    var options = {
-      highlightColor: 'yellow',
-      file: dir + '/diff.png'
-    };
-    GM.compare(dir + '/original.jpg', dir + '/noise1.png', options, function(err) {
+    // Create a new noisy image
+    gm.noise(0.3).write(dir + '/noise3.png', function (err) {
       if (err) return finish(err);
-      fs.exists(options.file, function(exists) {
-        finish(!exists);
+
+      var options = {
+        highlightColor: 'yellow',
+        file: dir + '/diff.png'
+      };
+
+      // Compare these images and write to a file.
+      GM.compare(dir + '/original.jpg', dir + '/noise3.png', options, function(err) {
+        if (err) return finish(err);
+
+        fs.exists(options.file, function(exists) {
+          if (exists) finish();
+          else finish(new Error('Diff file does not exist.'));
+        });
       });
-    });
-  }
+    })
+  });
 };