[Payments] Support canMakePayment on Desktop

components/payments/content/payment_request_state_unittest.cc

Index: components/payments/content/payment_request_state_unittest.cc
diff --git a/components/payments/content/payment_request_state_unittest.cc b/components/payments/content/payment_request_state_unittest.cc
index c9455875a094ffd5a290306fc3a0c20a19221f2e..476655d61ca72ccb33545013520c3b4417a0ebff 100644
--- a/components/payments/content/payment_request_state_unittest.cc
+++ b/components/payments/content/payment_request_state_unittest.cc
@@ -105,6 +105,77 @@ class PaymentRequestStateTest : public testing::Test,
   autofill::CreditCard credit_card_amex_;
 };
 
+TEST_F(PaymentRequestStateTest, CanMakePayment) {
+  // Default options.
+  RecreateStateWithOptions(mojom::PaymentOptions::New());
+
+  // CanMakePayment returns true because the method data requires Visa, and the
+  // user has a Visa card on file.
+  EXPECT_TRUE(state()->CanMakePayment());
+}
+
+TEST_F(PaymentRequestStateTest, CanMakePayment_CannotMakePayment) {
+  // The method data requires MasterCard.
+  std::vector<mojom::PaymentMethodDataPtr> method_data;
+  mojom::PaymentMethodDataPtr entry = mojom::PaymentMethodData::New();
+  entry->supported_methods.push_back("mastercard");
+  method_data.push_back(std::move(entry));
+  RecreateStateWithOptionsAndDetails(mojom::PaymentOptions::New(),
+                                     mojom::PaymentDetails::New(),
+                                     std::move(method_data));
+
+  // CanMakePayment returns false because the method data requires MasterCard,
+  // and the user doesn't have such an instrument.
+  EXPECT_FALSE(state()->CanMakePayment());
+}
+
+TEST_F(PaymentRequestStateTest, CanMakePayment_OnlyBasicCard) {
+  // The method data supports everything in basic-card.
+  mojom::PaymentMethodDataPtr entry = mojom::PaymentMethodData::New();
+  entry->supported_methods.push_back("basic-card");
+  std::vector<mojom::PaymentMethodDataPtr> method_data;
+  method_data.push_back(std::move(entry));
+  RecreateStateWithOptionsAndDetails(mojom::PaymentOptions::New(),
+                                     mojom::PaymentDetails::New(),
+                                     std::move(method_data));
+
+  // CanMakePayment returns true because the method data supports everything,
+  // and the user has at least one instrument.
+  EXPECT_TRUE(state()->CanMakePayment());
+}
+
+TEST_F(PaymentRequestStateTest, CanMakePayment_BasicCard_SpecificAvailable) {
+  // The method data supports everything in basic-card.
+  mojom::PaymentMethodDataPtr entry = mojom::PaymentMethodData::New();
+  entry->supported_methods.push_back("basic-card");
+  entry->supported_networks.push_back(mojom::BasicCardNetwork::VISA);
+  std::vector<mojom::PaymentMethodDataPtr> method_data;
+  method_data.push_back(std::move(entry));
+  RecreateStateWithOptionsAndDetails(mojom::PaymentOptions::New(),
+                                     mojom::PaymentDetails::New(),
+                                     std::move(method_data));
+
+  // CanMakePayment returns true because the method data supports visa, and the
+  // user has a Visa instrument.
+  EXPECT_TRUE(state()->CanMakePayment());
+}
+
+TEST_F(PaymentRequestStateTest, CanMakePayment_BasicCard_SpecificUnavailable) {
+  // The method data supports everything in basic-card.
+  mojom::PaymentMethodDataPtr entry = mojom::PaymentMethodData::New();
+  entry->supported_methods.push_back("basic-card");
+  entry->supported_networks.push_back(mojom::BasicCardNetwork::MASTERCARD);
+  std::vector<mojom::PaymentMethodDataPtr> method_data;
+  method_data.push_back(std::move(entry));
+  RecreateStateWithOptionsAndDetails(mojom::PaymentOptions::New(),
+                                     mojom::PaymentDetails::New(),
+                                     std::move(method_data));
+
+  // CanMakePayment returns false because the method data supports mastercard,
+  // and the user doesn't have such an instrument.
+  EXPECT_FALSE(state()->CanMakePayment());
+}
+
 // Test that the last shipping option is selected.
 TEST_F(PaymentRequestStateTest, ShippingOptionsSelection) {
   std::vector<mojom::PaymentShippingOptionPtr> shipping_options;