buffet: Allow setting command results.

Next step in command results support: now there is
CommandInstance::SetResults method which allows results
modifications.

BUG=chromium:435607
TEST=cros_workon_make --test buffet

Change-Id: I1f5da9c3613a2996cea3f65f07945cc64bfeda2e
Reviewed-on: https://chromium-review.googlesource.com/231337
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Tested-by: Anton Muhin <antonm@chromium.org>
Commit-Queue: Anton Muhin <antonm@chromium.org>

buffet/commands/dbus_command_proxy_unittest.cc

diff --git a/buffet/commands/dbus_command_proxy_unittest.cc b/buffet/commands/dbus_command_proxy_unittest.cc
index a810464..eac207b 100644
--- a/buffet/commands/dbus_command_proxy_unittest.cc
+++ b/buffet/commands/dbus_command_proxy_unittest.cc
@@ -65,7 +65,14 @@
               'enum': ['_withAirFlip', '_withSpin', '_withKick']
             }
           },
-          'results': {}
+          'results': {
+            'foo': {
+              'type': 'integer'
+            },
+            'bar': {
+              'type': 'string'
+            }
+          }
         }
       }
     })");
@@ -129,6 +136,10 @@
     return GetCommandProxy()->dbus_adaptor_.GetParameters();
   }
 
+  VariantDictionary GetResults() const {
+    return GetCommandProxy()->dbus_adaptor_.GetResults();
+  }
+
   std::unique_ptr<dbus::Response> CallMethod(
       const std::string& method_name,
       const std::function<void(dbus::MessageWriter*)>& param_callback) {
@@ -185,9 +196,12 @@
     {"height", int32_t{53}},
     {"_jumpType", std::string{"_withKick"}},
   };
+  VariantDictionary results;
+
   EXPECT_EQ(CommandInstance::kStatusQueued, GetStatus());
   EXPECT_EQ(0, GetProgress());
   EXPECT_EQ(params, GetParameters());
+  EXPECT_EQ(results, GetResults());
   EXPECT_EQ("robot.jump",
             GetPropertyValue<std::string>(dbus_constants::kCommandName));
   EXPECT_EQ(kTestCommandCategoty,
@@ -200,6 +214,9 @@
   EXPECT_EQ(params,
             GetPropertyValue<VariantDictionary>(
                 dbus_constants::kCommandParameters));
+  EXPECT_EQ(results,
+            GetPropertyValue<VariantDictionary>(
+                dbus_constants::kCommandResults));
 }
 
 TEST_F(DBusCommandProxyTest, SetProgress) {
@@ -226,6 +243,35 @@
   EXPECT_EQ(0, GetProgress());
 }
 
+TEST_F(DBusCommandProxyTest, SetResults) {
+  EXPECT_CALL(*mock_exported_object_command_, SendSignal(_)).Times(1);
+  const VariantDictionary results = {
+    {"foo", int32_t{42}},
+    {"bar", std::string{"foobar"}},
+  };
+  auto response = CallMethod(dbus_constants::kCommandSetResults,
+                             [results](dbus::MessageWriter* writer) {
+    chromeos::dbus_utils::AppendValueToWriter(writer, results);
+  });
+  VerifyResponse(response, {});
+  EXPECT_EQ(results, GetResults());
+  EXPECT_EQ(results,
+            GetPropertyValue<VariantDictionary>(
+                dbus_constants::kCommandResults));
+}
+
+TEST_F(DBusCommandProxyTest, SetResults_UnknownProperty) {
+  EXPECT_CALL(*mock_exported_object_command_, SendSignal(_)).Times(0);
+  const VariantDictionary results = {
+    {"quux", int32_t{42}},
+  };
+  auto response = CallMethod(dbus_constants::kCommandSetResults,
+                             [results](dbus::MessageWriter* writer) {
+    chromeos::dbus_utils::AppendValueToWriter(writer, results);
+  });
+  EXPECT_TRUE(IsResponseError(response));
+}
+
 TEST_F(DBusCommandProxyTest, Abort) {
   EXPECT_CALL(*mock_exported_object_command_, SendSignal(_)).Times(1);
   auto response = CallMethod(dbus_constants::kCommandAbort, {});