test(WhenAnonymousUserAuthenticates): port emptyValuesShouldBeConsideredAsInvalidCredentials() to Robot Framework.

Addressed to #530

No functional changes.

Author: php-coder

src/test/java/ru/mystamps/web/tests/cases/WhenAnonymousUserAuthenticates.java

@@ -52,14 +52,6 @@ public void openPage() {
 		page.open();
 	}
 
-	@Test(groups = "invalid")
-	public void emptyValuesShouldBeConsideredAsInvalidCredentials() {
-		page.authorizeUser("", "");
-		
-		assertThat(page.getFormError())
-			.isEqualTo(tr("AbstractUserDetailsAuthenticationProvider.badCredentials"));
-	}
-	
 	@Test(groups = "invalid")
 	public void invalidCredentialsShouldBeRejected() {
 		page.authorizeUser(invalidUserLogin, invalidUserPassword);

src/test/robotframework/account/authentication/validation.robot

@@ -0,0 +1,21 @@
+*** Settings ***
+Documentation   Verify account authentication validation scenarios
+Library         SeleniumLibrary
+Suite Setup     Before Test Suite
+Suite Teardown  After Test Suite
+Force Tags      account  authentication  validation
+
+*** Test Cases ***
+Authenticate with empty credentials
+	Input Text              id=login        ${EMPTY}
+	Input Text              id=password     ${EMPTY}
+	Submit Form             id=auth-account-form
+	Element Text Should Be  id=form.errors  Invalid login or password
+
+*** Keywords ***
+Before Test Suite
+	Open Browser                        ${SITE_URL}/account/auth  ${BROWSER}
+	Register Keyword To Run On Failure  Log Source
+
+After Test Suite
+	Close Browser