Adding support for prompt=create

changelog

@@ -2,6 +2,7 @@ MSAL Wiki : https://github.com/AzureAD/microsoft-authentication-library-for-andr
 
 vNext
 ----------
+- [MINOR] Add prompt=create support. (#1611)
 - [PATCH] Ensure consistent TAGs in the logger (#1612)
 - [MAJOR] Deprecate methods not using TokenParameters (#1595)
 - [PATCH] Update gson version to 2.8.9

msal/src/main/java/com/microsoft/identity/client/Prompt.java

@@ -49,6 +49,14 @@ public enum Prompt {
      */
     CONSENT,
 
+    /**
+     * acquireToken will send prompt=create to the /authorize endpoint.  The user will be prompted to create a new account.
+     * Requires configuring authority as type "AzureADMyOrg" with a tenant_id.
+     * <p>
+     * Prerequisite: https://docs.microsoft.com/en-us/azure/active-directory/external-identities/self-service-sign-up-user-flow
+     */
+    CREATE,
+
     /**
      * acquireToken will not send the prompt parameter to the authorize endpoint.  The user may be prompted to login or to consent as required by the request.
      */
@@ -65,6 +73,8 @@ public String toString() {
                 return CONSENT.name().toLowerCase(Locale.ROOT);
             case WHEN_REQUIRED:
                 return WHEN_REQUIRED.name().toLowerCase(Locale.ROOT);
+            case CREATE:
+                return CREATE.name().toLowerCase(Locale.ROOT);
             default:
                 throw new IllegalArgumentException();
         }
@@ -78,6 +88,8 @@ public OpenIdConnectPromptParameter toOpenIdConnectPromptParameter() {
                 return OpenIdConnectPromptParameter.CONSENT;
             case WHEN_REQUIRED:
                 return OpenIdConnectPromptParameter.UNSET;
+            case CREATE:
+                return OpenIdConnectPromptParameter.CREATE;
             case SELECT_ACCOUNT:
             default:
                 return OpenIdConnectPromptParameter.SELECT_ACCOUNT;

msal/src/test/java/com/microsoft/identity/client/PromptTest.java

@@ -37,28 +37,34 @@ public class PromptTest {
     public void testOpenIdConnectParameterSelectAccount() {
         prompt = Prompt.SELECT_ACCOUNT;
         final OpenIdConnectPromptParameter promptValue = prompt.toOpenIdConnectPromptParameter();
-        Assert.assertEquals(promptValue, OpenIdConnectPromptParameter.SELECT_ACCOUNT);
+        Assert.assertEquals(OpenIdConnectPromptParameter.SELECT_ACCOUNT, promptValue);
     }
 
     @Test
     public void testOpenIdConnectParameterLogin() {
         prompt = Prompt.LOGIN;
         final OpenIdConnectPromptParameter promptValue = prompt.toOpenIdConnectPromptParameter();
-        Assert.assertEquals(promptValue, OpenIdConnectPromptParameter.LOGIN);
+        Assert.assertEquals(OpenIdConnectPromptParameter.LOGIN, promptValue);
     }
 
     @Test
     public void testOpenIdConnectParameterConsent() {
         prompt = Prompt.CONSENT;
         final OpenIdConnectPromptParameter promptValue = prompt.toOpenIdConnectPromptParameter();
-        Assert.assertEquals(promptValue, OpenIdConnectPromptParameter.CONSENT);
+        Assert.assertEquals(OpenIdConnectPromptParameter.CONSENT, promptValue);
+    }
+
+    @Test
+    public void testOpenIdConnectParameterCreate() {
+        prompt = Prompt.CREATE;
+        final OpenIdConnectPromptParameter promptValue = prompt.toOpenIdConnectPromptParameter();
+        Assert.assertEquals(OpenIdConnectPromptParameter.CREATE, promptValue);
     }
 
     @Test
     public void testOpenIdConnectParameterWhenRequired() {
         prompt = Prompt.WHEN_REQUIRED;
         final OpenIdConnectPromptParameter promptValue = prompt.toOpenIdConnectPromptParameter();
-        Assert.assertEquals(promptValue, OpenIdConnectPromptParameter.UNSET);
+        Assert.assertEquals(OpenIdConnectPromptParameter.UNSET, promptValue);
     }
-
 }

msal/src/test/java/com/microsoft/identity/client/UIBehaviorTest.java

@@ -31,6 +31,7 @@ public final class UIBehaviorTest {
     public final static String LOGIN = "login";
     public final static String CONSENT = "consent";
     public final static String SELECT_ACCOUNT = "select_account";
+    public final static String CREATE = "create";
 
 
     @Test
@@ -50,4 +51,10 @@ public void testToStringSelectAccount() {
         Prompt behavior = Prompt.SELECT_ACCOUNT;
         Assert.assertEquals(behavior.toString(), SELECT_ACCOUNT);
     }
+
+    @Test
+    public void testToStringCreate() {
+        Prompt behavior = Prompt.CREATE;
+        Assert.assertEquals(behavior.toString(), CREATE);
+    }
 }