Add basic tests for summary parsing

lib/parse/__tests__/parseGlossary.js

@@ -1,9 +1,10 @@
 jest.autoMockOff();
 
+var Book = require('../../models/book');
+var createMockFS = require('../../fs/mock');
+
 describe('parseGlossary', function() {
     var parseGlossary = require('../parseGlossary');
-    var Book = require('../../models/book');
-    var createMockFS = require('../../fs/mock');
 
     pit('should parse glossary if exists', function() {
         var fs = createMockFS({

lib/parse/__tests__/parseSummary.js

@@ -0,0 +1,36 @@
+jest.autoMockOff();
+
+var Book = require('../../models/book');
+var createMockFS = require('../../fs/mock');
+
+describe('parseSummary', function() {
+    var parseSummary = require('../parseSummary');
+
+    pit('should parse summary if exists', function() {
+        var fs = createMockFS({
+            'SUMMARY.md': '# Summary\n\n* [Hello](hello.md)'
+        });
+        var book = Book.createForFS(fs);
+
+        return parseSummary(book)
+        .then(function(resultBook) {
+            var summary = resultBook.getSummary();
+            var file = summary.getFile();
+
+            expect(file.exists()).toBeTruthy();
+        });
+    });
+
+    pit('should not fail if doesn\'t exist', function() {
+        var fs = createMockFS({});
+        var book = Book.createForFS(fs);
+
+        return parseSummary(book)
+        .then(function(resultBook) {
+            var summary = resultBook.getSummary();
+            var file = summary.getFile();
+
+            expect(file.exists()).toBeFalsy();
+        });
+    });
+});