chrome/browser/extensions/extension_api_unittest.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_API_UNITTEST_H_
   6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_API_UNITTEST_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "chrome/test/base/browser_with_test_window_test.h"
  13
  14 namespace base {
  15 class Value;
  16 class DictionaryValue;
  17 class ListValue;
  18 }
  19
  20 namespace content {
  21 class WebContents;
  22 }
  23
  24 class UIThreadExtensionFunction;
  25
  26 namespace extensions {
  27
  28 // Use this class to enable calling API functions in a unittest.
  29 // By default, this class will create and load an empty unpacked |extension_|,
  30 // which will be used in all API function calls. This extension can be
  31 // overridden using set_extension().
  32 // By default, this class does not create a WebContents for the API functions.
  33 // If a WebContents is needed, calling CreateBackgroundPage() will create a
  34 // background page for the extension and use it in API function calls. (If
  35 // needed, this could be expanded to allow for alternate WebContents).
  36 // When calling RunFunction[AndReturn*], |args| should be in JSON format,
  37 // wrapped in a list. See also RunFunction* in extension_function_test_utils.h.
  38 class ExtensionApiUnittest : public BrowserWithTestWindowTest {
  39  public:
  40   ExtensionApiUnittest();
  41   virtual ~ExtensionApiUnittest();
  42
  43   content::WebContents* contents() { return contents_; }
  44
  45   const Extension* extension() const { return extension_.get(); }
  46   scoped_refptr<Extension> extension_ref() { return extension_; }
  47   void set_extension(scoped_refptr<Extension> extension) {
  48     extension_ = extension;
  49   }
  50
  51  protected:
  52   // SetUp creates and loads an empty, unpacked Extension.
  53   virtual void SetUp() OVERRIDE;
  54
  55   // Creates a background page for |extension_|, and sets it for the WebContents
  56   // to be used in API calls.
  57   // If |contents_| is already set, this does nothing.
  58   void CreateBackgroundPage();
  59
  60   // Various ways of running an API function. These methods take ownership of
  61   // |function|. |args| should be in JSON format, wrapped in a list.
  62   // See also the RunFunction* methods in extension_function_test_utils.h.
  63
  64   // Return the function result as a base::Value.
  65   scoped_ptr<base::Value> RunFunctionAndReturnValue(
  66       UIThreadExtensionFunction* function, const std::string& args);
  67
  68   // Return the function result as a base::DictionaryValue, or NULL.
  69   // This will EXPECT-fail if the result is not a DictionaryValue.
  70   scoped_ptr<base::DictionaryValue> RunFunctionAndReturnDictionary(
  71       UIThreadExtensionFunction* function, const std::string& args);
  72
  73   // Return the function result as a base::ListValue, or NULL.
  74   // This will EXPECT-fail if the result is not a ListValue.
  75   scoped_ptr<base::ListValue> RunFunctionAndReturnList(
  76       UIThreadExtensionFunction* function, const std::string& args);
  77
  78   // Return an error thrown from the function, if one exists.
  79   // This will EXPECT-fail if any result is returned from the function.
  80   std::string RunFunctionAndReturnError(
  81       UIThreadExtensionFunction* function, const std::string& args);
  82
  83   // Run the function and ignore any result.
  84   void RunFunction(
  85       UIThreadExtensionFunction* function, const std::string& args);
  86
  87  private:
  88   // The WebContents used to associate a RenderViewHost with API function calls,
  89   // or NULL.
  90   content::WebContents* contents_;
  91
  92   // The Extension used when running API function calls.
  93   scoped_refptr<Extension> extension_;
  94 };
  95
  96 }  // namespace extensions
  97
  98 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_API_UNITTEST_H_