Add test for custom print style

Author: SamyPesse

test/books/style-print/README.md

@@ -0,0 +1,3 @@
+# Readme
+
+Default description for the book.

test/books/style-print/SUMMARY.md

@@ -0,0 +1 @@
+# Summary

test/books/style-print/styles/print.css

@@ -0,0 +1,3 @@
+body {
+    color: red;
+}

test/ebook.js

@@ -21,4 +21,35 @@ describe('eBook generator', function () {
             book.should.have.file("gitbook/style.css");
         });
     });
+
+    describe('Custom styles', function() {
+        var book;
+
+        before(function() {
+            return books.generate("style-print", "ebook")
+                .then(function(_book) {
+                    book = _book;
+                });
+        });
+
+        it('should remove default print.css', function() {
+            var PAGE = fs.readFileSync(
+                path.join(book.options.output, "index.html"),
+                { encoding: "utf-8" }
+            );
+            PAGE.should.be.html({
+                "link": {
+                    count: 1,
+                    attributes: {
+                        href: "./styles/print.css"
+                    }
+                }
+            });
+        });
+
+        it('should correctly print.css', function() {
+            book.should.have.file("styles");
+            book.should.have.file("styles/print.css");
+        });
+    })
 });