PM: Add BoxedValue::ToString() method.

This will be used to dump variables in the EvaluationContext.

BUG=chromium:355724
TEST=New unit test + Unit tests pass.

Change-Id: I82a3fb5d2636fd124dfbf63bf130fcd3c5726bcd
Reviewed-on: https://chromium-review.googlesource.com/197524
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: David Zeuthen <zeuthen@chromium.org>
Tested-by: David Zeuthen <zeuthen@chromium.org>
diff --git a/policy_manager/boxed_value_unittest.cc b/policy_manager/boxed_value_unittest.cc
index 3d56257..6319ba7 100644
--- a/policy_manager/boxed_value_unittest.cc
+++ b/policy_manager/boxed_value_unittest.cc
@@ -5,11 +5,20 @@
 #include <gtest/gtest.h>
 #include <list>
 #include <map>
+#include <set>
 #include <string>
 
+#include <base/strings/stringprintf.h>
+#include <base/time/time.h>
+
 #include "update_engine/policy_manager/boxed_value.h"
 #include "update_engine/policy_manager/pmtest_utils.h"
+#include "update_engine/policy_manager/shill_provider.h"
+#include "update_engine/policy_manager/updater_provider.h"
 
+using base::Time;
+using base::TimeDelta;
+using std::set;
 using std::list;
 using std::map;
 using std::string;
@@ -24,10 +33,19 @@
   ~DeleterMarker() { *marker_ = true; }
 
  private:
+  friend string BoxedValue::ValuePrinter<DeleterMarker>(const void *);
+
   // Pointer to the bool marker.
   bool* marker_;
 };
 
+template<>
+string BoxedValue::ValuePrinter<DeleterMarker>(const void *value) {
+  const DeleterMarker* val = reinterpret_cast<const DeleterMarker*>(value);
+  return base::StringPrintf("DeleterMarker:%s",
+                            *val->marker_ ? "true" : "false");
+}
+
 TEST(PmBoxedValueTest, Deleted) {
   bool marker = true;
   const DeleterMarker* deleter_marker = new DeleterMarker(&marker);
@@ -75,4 +93,124 @@
   PMTEST_EXPECT_NULL(m[33].value());
 }
 
+TEST(PmBoxedValueTest, StringToString) {
+  EXPECT_EQ("Hej Verden!",
+            BoxedValue(new string("Hej Verden!")).ToString());
+}
+
+TEST(PmBoxedValueTest, IntToString) {
+  EXPECT_EQ("42", BoxedValue(new int(42)).ToString());
+}
+
+TEST(PmBoxedValueTest, UnsignedIntToString) {
+  // 4294967295 is the biggest possible 32-bit unsigned integer.
+  EXPECT_EQ("4294967295", BoxedValue(new unsigned int(4294967295)).ToString());
+}
+
+TEST(PmBoxedValueTest, UnsignedLongToString) {
+  EXPECT_EQ("4294967295", BoxedValue(new unsigned long(4294967295)).ToString());
+}
+
+TEST(PmBoxedValueTest, UnsignedLongLongToString) {
+  // 18446744073709551615 is the biggest possible 64-bit unsigned integer.
+  EXPECT_EQ("18446744073709551615", BoxedValue(
+      new unsigned long long(18446744073709551615ULL)).ToString());
+}
+
+TEST(PmBoxedValueTest, BoolToString) {
+  EXPECT_EQ("false", BoxedValue(new bool(false)).ToString());
+  EXPECT_EQ("true", BoxedValue(new bool(true)).ToString());
+}
+
+TEST(PmBoxedValueTest, DoubleToString) {
+  EXPECT_EQ("1.501", BoxedValue(new double(1.501)).ToString());
+}
+
+TEST(PmBoxedValueTest, TimeToString) {
+  // Tue Apr 29 22:30:55 UTC 2014 is 1398810655 seconds since the Unix Epoch.
+  EXPECT_EQ("4/29/2014 22:30:55 GMT",
+            BoxedValue(new Time(Time::FromTimeT(1398810655))).ToString());
+}
+
+TEST(PmBoxedValueTest, TimeDeltaToString) {
+  // 12345 seconds is 3 hours, 25 minutes and 45 seconds.
+  EXPECT_EQ("3h25m45s",
+            BoxedValue(new TimeDelta(TimeDelta::FromSeconds(12345)))
+            .ToString());
+}
+
+TEST(PmBoxedValueTest, ConnectionTypeToString) {
+  EXPECT_EQ("Ethernet",
+            BoxedValue(new ConnectionType(ConnectionType::kEthernet))
+            .ToString());
+  EXPECT_EQ("Wifi",
+            BoxedValue(new ConnectionType(ConnectionType::kWifi)).ToString());
+  EXPECT_EQ("Wimax",
+            BoxedValue(new ConnectionType(ConnectionType::kWimax)).ToString());
+  EXPECT_EQ("Bluetooth",
+            BoxedValue(new ConnectionType(ConnectionType::kBluetooth))
+            .ToString());
+  EXPECT_EQ("Cellular",
+            BoxedValue(new ConnectionType(ConnectionType::kCellular))
+            .ToString());
+  EXPECT_EQ("Unknown",
+            BoxedValue(new ConnectionType(ConnectionType::kUnknown))
+            .ToString());
+}
+
+TEST(PmBoxedValueTest, ConnectionTetheringToString) {
+  EXPECT_EQ("Not Detected",
+            BoxedValue(new ConnectionTethering(
+                ConnectionTethering::kNotDetected)).ToString());
+  EXPECT_EQ("Suspected",
+            BoxedValue(new ConnectionTethering(ConnectionTethering::kSuspected))
+            .ToString());
+  EXPECT_EQ("Confirmed",
+            BoxedValue(new ConnectionTethering(ConnectionTethering::kConfirmed))
+            .ToString());
+  EXPECT_EQ("Unknown",
+            BoxedValue(new ConnectionTethering(ConnectionTethering::kUnknown))
+            .ToString());
+}
+
+TEST(PmBoxedValueTest, SetConnectionTypeToString) {
+  set<ConnectionType>* set1 = new set<ConnectionType>;
+  set1->insert(ConnectionType::kWimax);
+  set1->insert(ConnectionType::kEthernet);
+  EXPECT_EQ("Ethernet,Wimax", BoxedValue(set1).ToString());
+
+  set<ConnectionType>* set2 = new set<ConnectionType>;
+  set2->insert(ConnectionType::kWifi);
+  EXPECT_EQ("Wifi", BoxedValue(set2).ToString());
+}
+
+TEST(PmBoxedValueTest, StageToString) {
+  EXPECT_EQ("Idle",
+            BoxedValue(new Stage(Stage::kIdle)).ToString());
+  EXPECT_EQ("Checking For Update",
+            BoxedValue(new Stage(Stage::kCheckingForUpdate)).ToString());
+  EXPECT_EQ("Update Available",
+            BoxedValue(new Stage(Stage::kUpdateAvailable)).ToString());
+  EXPECT_EQ("Downloading",
+            BoxedValue(new Stage(Stage::kDownloading)).ToString());
+  EXPECT_EQ("Verifying",
+            BoxedValue(new Stage(Stage::kVerifying)).ToString());
+  EXPECT_EQ("Finalizing",
+            BoxedValue(new Stage(Stage::kFinalizing)).ToString());
+  EXPECT_EQ("Updated, Need Reboot",
+            BoxedValue(new Stage(Stage::kUpdatedNeedReboot)).ToString());
+  EXPECT_EQ("Reporting Error Event",
+            BoxedValue(new Stage(Stage::kReportingErrorEvent)).ToString());
+  EXPECT_EQ("Attempting Rollback",
+            BoxedValue(new Stage(Stage::kAttemptingRollback)).ToString());
+}
+
+TEST(PmBoxedValueTest, DeleterMarkerToString) {
+  bool marker = false;
+  BoxedValue value = BoxedValue(new DeleterMarker(&marker));
+  EXPECT_EQ("DeleterMarker:false", value.ToString());
+  marker = true;
+  EXPECT_EQ("DeleterMarker:true", value.ToString());
+}
+
 }  // namespace chromeos_policy_manager