[Payments] Add detailed error messages and title for card unmask prompt.

chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestExpiredLocalCardTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestExpiredLocalCardTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestExpiredLocalCardTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestExpiredLocalCardTest.java
index cb18b020d5b57f39805fc2fbaa9e68249d6fd09e..08c11fec2238212cb5831987fcc1e47dd1aca4b1 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestExpiredLocalCardTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestExpiredLocalCardTest.java
@@ -112,4 +112,48 @@ public class PaymentRequestExpiredLocalCardTest extends PaymentRequestTestBase {
 
         clickInCardEditorAndWait(R.id.payments_edit_done_button, mReadyToPay);
     }
+
+    /**
+     * Tests the different card unmask error messages for an expired card.
+     */
+    @MediumTest
+    @Feature({"Payments"})
+    public void testPromptErrorMessages()
+            throws InterruptedException, ExecutionException, TimeoutException {
+        // Click pay to get to the card unmask prompt.
+        triggerUIAndWait(mReadyToPay);
+        clickAndWait(R.id.button_primary, mReadyForUnmaskInput);
+
+        // Set valid arguments.
+        setTextInExpiredCardUnmaskDialogAndWait(
+                new int[] {R.id.expiration_month, R.id.expiration_year, R.id.card_unmask_input},
+                new String[] {"10", "26", "123"}, mUnmaskValidationDone);
+        assertTrue(getUnmaskPromptErrorMessage().equals(""));
+
+        // Set an invalid expiration date.
+        setTextInExpiredCardUnmaskDialogAndWait(
+                new int[] {R.id.expiration_month, R.id.expiration_year, R.id.card_unmask_input},
+                new String[] {"10", "14", "123"}, mUnmaskValidationDone);
+        assertTrue(getUnmaskPromptErrorMessage().equals(
+                "Check your expiration date and try again"));
+
+        // Set an invalid CVC and expiration date.
+        setTextInExpiredCardUnmaskDialogAndWait(
+                new int[] {R.id.expiration_month, R.id.expiration_year, R.id.card_unmask_input},
+                new String[] {"10", "14", "12312"}, mUnmaskValidationDone);
+        assertTrue(getUnmaskPromptErrorMessage().equals(
+                "Check your expiration date and CVC and try again"));
+
+        // Set an invalid CVC.
+        setTextInExpiredCardUnmaskDialogAndWait(
+                new int[] {R.id.expiration_month, R.id.expiration_year, R.id.card_unmask_input},
+                new String[] {"10", "26", "12312"}, mUnmaskValidationDone);
+        assertTrue(getUnmaskPromptErrorMessage().equals("Check your CVC and try again"));
+
+        // Set valid arguments again.
+        setTextInExpiredCardUnmaskDialogAndWait(
+                new int[] {R.id.expiration_month, R.id.expiration_year, R.id.card_unmask_input},
+                new String[] {"10", "26", "123"}, mUnmaskValidationDone);
+        assertTrue(getUnmaskPromptErrorMessage().equals(""));
+    }
 }