Breaking: Append path to history in constructor (closes #95)

Author: phated

index.js

@@ -30,7 +30,10 @@ function File(file) {
   this.contents = file.contents || null;
 
   // Replay path history to ensure proper normalization and trailing sep
-  var history = file.path ? [file.path] : file.history || [];
+  var history = Array.prototype.slice.call(file.history || []);
+  if (file.path) {
+    history.push(file.path);
+  }
   this.history = [];
   history.forEach(function(path) {
     self.path = path;

test/File.js

@@ -182,6 +182,52 @@ describe('File', function() {
         ]);
       }
     });
+
+    it('appends path to history if both exist and different from last', function(done) {
+      var p = path.normalize('/test/baz/test.coffee');
+      var history = [
+        path.normalize('/test/bar/test.coffee'),
+        path.normalize('/test/foo/test.coffee'),
+      ];
+      var file = new File({ path: p, history: history });
+
+      var expectedHistory = history.concat(p);
+
+      file.path.should.equal(path.normalize('/test/baz/test.coffee'));
+      file.history.should.eql(expectedHistory);
+      done();
+    });
+
+    it('does not append path to history if both exist and same as last', function(done) {
+      var history = [
+        path.normalize('/test/bar/test.coffee'),
+        path.normalize('/test/foo/test.coffee'),
+        path.normalize('/test/baz/test.coffee'),
+      ];
+      var file = new File({ path: history[history.length - 1], history: history });
+
+      file.path.should.equal(path.normalize('/test/baz/test.coffee'));
+      file.history.should.eql(history);
+      done();
+    });
+
+    it('does not mutate history array passed in', function(done) {
+      var p = path.normalize('/test/baz/test.coffee');
+      var history = [
+        path.normalize('/test/bar/test.coffee'),
+        path.normalize('/test/foo/test.coffee'),
+      ];
+      var historyCopy = Array.prototype.slice.call(history);
+      var file = new File({ path: p, history: history });
+
+      var expectedHistory = history.concat(p);
+
+      file.path.should.equal(path.normalize('/test/baz/test.coffee'));
+      file.history.should.eql(expectedHistory);
+      history.should.eql(historyCopy);
+      done();
+    });
+
   });
 
   describe('isBuffer()', function() {