Add tests for page hook

test/node_modules/gitbook-plugin-test-deprecated/index.js

@@ -0,0 +1,8 @@
+module.exports = {
+    hooks: {
+        page: function(page) {
+            page.sections[0].content = 'Hello (sections) ' + page.content;
+            return page;
+        }
+    }
+};

test/node_modules/gitbook-plugin-test-deprecated/package.json

@@ -0,0 +1,7 @@
+{
+    "name": "gitbook-plugin-test-deprecated",
+    "version": "1.0.0",
+    "engines": {
+        "gitbook": "*"
+    }
+}

test/node_modules/gitbook-plugin-test-hooks/index.js

@@ -1,5 +1,3 @@
-var should = require('should');
-
 module.exports = {
     hooks: {
         'init': function() {
@@ -11,6 +9,10 @@ module.exports = {
         },
         'finish:before': function() {
             global._hooks.push('finish:before');
+        },
+        page: function(page) {
+            page.content = 'Hello ' + page.content;
+            return page;
         }
     }
 };