Add flag to enable/disable affiliaton based matching.

components/password_manager/core/browser/affiliation_utils_unittest.cc

Index: components/password_manager/core/browser/affiliation_utils_unittest.cc
diff --git a/components/password_manager/core/browser/affiliation_utils_unittest.cc b/components/password_manager/core/browser/affiliation_utils_unittest.cc
index 540963d65761d69c9503cca2f80e33bbbf9c288d..c67ac8be778dcf5aab5a2151b5de2f9848624d2e 100644
--- a/components/password_manager/core/browser/affiliation_utils_unittest.cc
+++ b/components/password_manager/core/browser/affiliation_utils_unittest.cc
@@ -4,6 +4,9 @@
 
 #include "components/password_manager/core/browser/affiliation_utils.h"
 
+#include "base/command_line.h"
+#include "base/metrics/field_trial.h"
+#include "components/password_manager/core/common/password_manager_switches.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/url_constants.h"
 
@@ -192,4 +195,44 @@ TEST(AffiliationUtilsTest, NotEqualEquivalenceClasses) {
   EXPECT_FALSE(AreEquivalenceClassesEqual(c, b));
 }
 
+TEST(AffiliationUtilsTest, IsAffiliationBasedMatchingEnabled) {
+  const char kFieldTrialName[] = "AffiliationBasedMatching";
+
+  struct {
+    const char* field_trial_group;
+    const char* command_line_switch;
+    bool expected_enabled;
+  } kTestCases[] = {
+      {"", "", false},
+      {"", switches::kEnableAffiliationBasedMatching, true},
+      {"", switches::kDisableAffiliationBasedMatching, false},
+      {"garbage value", "", false},
+      {"disabled", "", false},
+      {"disabled2", "", false},
+      {"Disabled", "", false},
+      {"Disabled", switches::kDisableAffiliationBasedMatching, false},
+      {"Disabled", switches::kEnableAffiliationBasedMatching, true},
+      {"enabled", "", true},
+      {"enabled2", "", true},
+      {"Enabled", "", true},
+      {"Enabled", switches::kDisableAffiliationBasedMatching, false},
+      {"Enabled", switches::kEnableAffiliationBasedMatching, true}};
+
+  for (const auto& test_case : kTestCases) {
+    SCOPED_TRACE(testing::Message("Command line = ")
+                 << test_case.command_line_switch);
+    SCOPED_TRACE(testing::Message("Group name = ")
+                 << test_case.field_trial_group);
+
+    base::FieldTrialList field_trials(NULL);
+    base::FieldTrialList::CreateFieldTrial(kFieldTrialName,
+                                           test_case.field_trial_group);
+
+    base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
+    command_line.AppendSwitch(test_case.command_line_switch);
+    EXPECT_EQ(test_case.expected_enabled,
+              IsAffiliationBasedMatchingEnabled(command_line));
+  }
+}
+
 }  // namespace password_manager