3 files changed, 134 insertions, 2 deletions
diff --git a/lib/modifiers/summary/__tests__/insertArticle.js b/lib/modifiers/summary/__tests__/insertArticle.js
new file mode 100644
index 0000000..1ee1c8a
--- /dev/null
+++ b/lib/modifiers/summary/__tests__/insertArticle.js
@@ -0,0 +1,78 @@
+var Summary = require('../../../models/summary');
+var SummaryArticle = require('../../../models/summaryArticle');
+var File = require('../../../models/file');
+
+describe('insertArticle', function() {
+    var insertArticle = require('../insertArticle');
+    var summary = Summary.createFromParts(File(), [
+        {
+            articles: [
+                {
+                    title: '1.1',
+                    path: '1.1'
+                },
+                {
+                    title: '1.2',
+                    path: '1.2'
+                }
+            ]
+        },
+        {
+            title: 'Part I',
+            articles: [
+                {
+                    title: '2.1',
+                    path: '2.1',
+                    articles: [
+                        {
+                            title: '2.1.1',
+                            path: '2.1.1'
+                        },
+                        {
+                            title: '2.1.2',
+                            path: '2.1.2'
+                        }
+                    ]
+                },
+                {
+                    title: '2.2',
+                    path: '2.2'
+                }
+            ]
+        }
+    ]);
+
+    it('should insert an article at a given level', function() {
+        var article = SummaryArticle.create({
+            title: 'Inserted'
+        }, 'fake.level');
+
+        var newSummary = insertArticle(summary, article, '2.1.1');
+
+        var inserted = newSummary.getByLevel('2.1.1');
+        var nextOne = newSummary.getByLevel('2.1.2');
+
+        expect(inserted.getTitle()).toBe('Inserted');
+        expect(inserted.getLevel()).toBe('2.1.1');
+
+        expect(nextOne.getTitle()).toBe('2.1.1');
+        expect(nextOne.getLevel()).toBe('2.1.2');
+    });
+
+    it('should insert an article in last position', function() {
+        var article = SummaryArticle.create({
+            title: 'Inserted'
+        }, 'fake.level');
+
+        var newSummary = insertArticle(summary, article, '2.2');
+
+        var inserted = newSummary.getByLevel('2.2');
+        var previousOne = newSummary.getByLevel('2.1');
+
+        expect(inserted.getTitle()).toBe('Inserted');
+        expect(inserted.getLevel()).toBe('2.2');
+
+        expect(previousOne.getTitle()).toBe('2.1'); // Unchanged
+        expect(previousOne.getLevel()).toBe('2.1');
+    });
+});
diff --git a/lib/modifiers/summary/__tests__/removeArticle.js b/lib/modifiers/summary/__tests__/removeArticle.js
new file mode 100644
index 0000000..c961f14
--- /dev/null
+++ b/lib/modifiers/summary/__tests__/removeArticle.js
@@ -0,0 +1,54 @@
+var Summary = require('../../../models/summary');
+var SummaryArticle = require('../../../models/summaryArticle');
+var File = require('../../../models/file');
+
+describe('removeArticle', function() {
+    var removeArticle = require('../removeArticle');
+    var summary = Summary.createFromParts(File(), [
+        {
+            articles: [
+                {
+                    title: '1.1',
+                    path: '1.1'
+                },
+                {
+                    title: '1.2',
+                    path: '1.2'
+                }
+            ]
+        },
+        {
+            title: 'Part I',
+            articles: [
+                {
+                    title: '2.1',
+                    path: '2.1',
+                    articles: [
+                        {
+                            title: '2.1.1',
+                            path: '2.1.1'
+                        },
+                        {
+                            title: '2.1.2',
+                            path: '2.1.2'
+                        }
+                    ]
+                },
+                {
+                    title: '2.2',
+                    path: '2.2'
+                }
+            ]
+        }
+    ]);
+
+    it('should remove an article at a given level', function() {
+        var newSummary = removeArticle(summary, '2.1.1');
+
+        var removed = newSummary.getByLevel('2.1.1');
+        var nextOne = newSummary.getByLevel('2.1.2');
+
+        expect(removed.getTitle()).toBe('2.1.2');
+        expect(nextOne).toBe(null);
+    });
+});
diff --git a/lib/modifiers/summary/insertArticle.js b/lib/modifiers/summary/insertArticle.js
index 849f39e..3a084b3 100644
--- a/lib/modifiers/summary/insertArticle.js
+++ b/lib/modifiers/summary/insertArticle.js
@@ -8,11 +8,11 @@ var indexArticleLevels = require('./indexArticleLevels');
     subsequent article shifted.
 
     @param {Summary} summary
-    @param {String|Article} level: level to insert at
     @param {Article} article
+    @param {String|Article} level: level to insert at
     @return {Summary}
 */
-function insertArticle(summary, level, article) {
+function insertArticle(summary, article, level) {
     article = SummaryArticle(article);
     level = is.string(level)? level : level.getLevel();