Autofill: Set requirements for number of recognized fields in an autofillable form

components/autofill/core/browser/form_field_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/scoped_vector.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/autofill_field.h"
 #include "components/autofill/core/browser/form_field.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 117 matching lines @@
   FormFieldData field_data;
   field_data.form_control_type = "text";
 
   field_data.label = ASCIIToUTF16("Address line1");
   fields.push_back(new AutofillField(field_data, field_data.label));
 
   field_data.is_checkable = true;
   field_data.label = ASCIIToUTF16("Is PO Box");
   fields.push_back(new AutofillField(field_data, field_data.label));
 
-  // reset is_checkable to false.
+  // reset |is_checkable| to false.
   field_data.is_checkable = false;
+
   field_data.label = ASCIIToUTF16("Address line2");
   fields.push_back(new AutofillField(field_data, field_data.label));
 
   ServerFieldTypeMap field_type_map;
-  FormField::ParseFormFields(fields.get(), &field_type_map);
+  FormField::ParseFormFields(fields.get(), true, &field_type_map);
+  // Does not parse since there are only 2 recognized fields.
+  ASSERT_EQ(0U, field_type_map.size());
+
+  field_data.label = ASCIIToUTF16("City");
+  fields.push_back(new AutofillField(field_data, field_data.label));
+
   // Checkable element shouldn't interfere with inference of Address line2.
-  EXPECT_EQ(2U, field_type_map.size());
+  field_type_map.clear();
+  FormField::ParseFormFields(fields.get(), true, &field_type_map);
+  ASSERT_EQ(3U, field_type_map.size());
 
   EXPECT_EQ(ADDRESS_HOME_LINE1,
             field_type_map.find(ASCIIToUTF16("Address line1"))->second);
   EXPECT_EQ(ADDRESS_HOME_LINE2,
             field_type_map.find(ASCIIToUTF16("Address line2"))->second);
 }
 
 }  // namespace autofill