Make test outputs involving PasswordForms more readable.

components/autofill/core/common/password_form.cc

Index: components/autofill/core/common/password_form.cc
diff --git a/components/autofill/core/common/password_form.cc b/components/autofill/core/common/password_form.cc
index c3a68f9961769dac0b2e32da843de98e73232fc7..8fd60d0f02b5a27598650a3993a2430d7bea8c40 100644
--- a/components/autofill/core/common/password_form.cc
+++ b/components/autofill/core/common/password_form.cc
@@ -3,14 +3,62 @@
 // found in the LICENSE file.
 
 #include <ostream>
+#include <sstream>
 
+#include "base/json/json_writer.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
 #include "components/autofill/core/common/password_form.h"
 
 namespace autofill {
 
+namespace {
+
+// Serializes a PasswordForm to a JSON object. Used only for logging in tests.
+void PasswordFormToJSON(const PasswordForm& form,
+                        base::DictionaryValue* target) {
+  target->SetInteger("scheme", form.scheme);
+  target->SetString("signon_realm", form.signon_realm);
+  target->SetString("signon_realm", form.signon_realm);
+  target->SetString("original_signon_realm", form.original_signon_realm);
+  target->SetString("origin", form.origin.possibly_invalid_spec());
+  target->SetString("action", form.action.possibly_invalid_spec());
+  target->SetString("submit_element", form.submit_element);
+  target->SetString("username_elem", form.username_element);
+  target->SetBoolean("username_marked_by_site", form.username_marked_by_site);
+  target->SetString("username_value", form.username_value);
+  target->SetString("password_elem", form.password_element);
+  target->SetString("password_value", form.password_value);
+  target->SetString("new_password_element", form.new_password_element);
+  target->SetString("new_password_value", form.new_password_value);
+  target->SetString("other_possible_usernames",
+                    JoinString(form.other_possible_usernames, '|'));
+  target->SetBoolean("autocomplete_set", form.password_autocomplete_set);
+  target->SetBoolean("blacklisted", form.blacklisted_by_user);
+  target->SetBoolean("preferred", form.preferred);
+  target->SetBoolean("ssl_valid", form.ssl_valid);
+  target->SetDouble("date_created", form.date_created.ToDoubleT());
+  target->SetDouble("date_synced", form.date_synced.ToDoubleT());
+  target->SetInteger("type", form.type);
+  target->SetInteger("times_used", form.times_used);
+  std::ostringstream form_data_string_stream;
+  form_data_string_stream << form.form_data;
+  target->SetString("form_data", form_data_string_stream.str());
+  target->SetInteger("generation_upload_status", form.generation_upload_status);
+  target->SetString("display_name", form.display_name);
+  target->SetString("avatar_url", form.avatar_url.possibly_invalid_spec());
+  target->SetString("federation_url",
+                    form.federation_url.possibly_invalid_spec());
+  target->SetBoolean("skip_next_zero_click", form.skip_zero_click);
+  std::ostringstream layout_string_stream;
+  layout_string_stream << form.layout;
+  target->SetString("layout", layout_string_stream.str());
+}
+
+}  // namespace
+
 PasswordForm::PasswordForm()
     : scheme(SCHEME_HTML),
       username_marked_by_site(false),
@@ -81,38 +129,31 @@ std::ostream& operator<<(std::ostream& os, PasswordForm::Layout layout) {
 }
 
 std::ostream& operator<<(std::ostream& os, const PasswordForm& form) {
-  return os << "scheme: " << form.scheme
-            << " signon_realm: " << form.signon_realm
-            << " original_signon_realm: " << form.original_signon_realm
-            << " origin: " << form.origin
-            << " action: " << form.action
-            << " submit_element: " << base::UTF16ToUTF8(form.submit_element)
-            << " username_elem: " << base::UTF16ToUTF8(form.username_element)
-            << " username_marked_by_site: " << form.username_marked_by_site
-            << " username_value: " << base::UTF16ToUTF8(form.username_value)
-            << " password_elem: " << base::UTF16ToUTF8(form.password_element)
-            << " password_value: " << base::UTF16ToUTF8(form.password_value)
-            << " new_password_element: "
-            << base::UTF16ToUTF8(form.new_password_element)
-            << " new_password_value: "
-            << base::UTF16ToUTF8(form.new_password_value)
-            << " other_possible_usernames: "
-            << JoinString(form.other_possible_usernames, '|')
-            << " autocomplete_set:" << form.password_autocomplete_set
-            << " blacklisted: " << form.blacklisted_by_user
-            << " preferred: " << form.preferred
-            << " ssl_valid: " << form.ssl_valid
-            << " date_created: " << form.date_created.ToDoubleT()
-            << " date_synced: " << form.date_synced.ToDoubleT()
-            << " type: " << form.type
-            << " times_used: " << form.times_used
-            << " form_data: " << form.form_data
-            << " generation_upload_status: " << form.generation_upload_status
-            << " display_name: " << base::UTF16ToUTF8(form.display_name)
-            << " avatar_url: " << form.avatar_url
-            << " federation_url: " << form.federation_url
-            << " skip_next_zero_click: " << form.skip_zero_click
-            << " layout: " << form.layout;
+  base::DictionaryValue form_json;
+  PasswordFormToJSON(form, &form_json);
+
+  // Serialize the default PasswordForm, and remove values from the result that
+  // are equal to this to make the results more concise.
+  base::DictionaryValue default_form_json;
+  PasswordFormToJSON(PasswordForm(), &default_form_json);
+  for (base::DictionaryValue::Iterator it_default_key_values(default_form_json);
+       !it_default_key_values.IsAtEnd(); it_default_key_values.Advance()) {
+    const base::Value* actual_value;
+    if (form_json.Get(it_default_key_values.key(), &actual_value) &&
+        it_default_key_values.value().Equals(actual_value)) {
+      form_json.Remove(it_default_key_values.key(), nullptr);
+    }
+  }
+
+  std::string form_as_string;
+  base::JSONWriter::WriteWithOptions(
+      &form_json, base::JSONWriter::OPTIONS_PRETTY_PRINT, &form_as_string);
+  base::TrimWhitespaceASCII(form_as_string, base::TRIM_ALL, &form_as_string);
+  return os << "PasswordForm(" << form_as_string << ")";
+}
+
+std::ostream& operator<<(std::ostream& os, PasswordForm* form) {
+  return os << "&" << *form;
 }
 
 }  // namespace autofill