Fix #12 - exceptions and address literals (#15)

* fix out of bound exception when moving within the tokens list

* fix missing closing bracket in literal domains

* fix travis issues with xenial dist

* Fix infinite loop when AT token is missing

Author: Eduardo Gulias Davis

.travis.yml

@@ -1,3 +1,5 @@
+dist: trusty
 language: java
 jdk:
-  - oraclejdk8
+  - oraclejdk8
+  - openjdk8

src/main/java/emailvalidator4j/lexer/EmailLexer.java

@@ -62,7 +62,10 @@ public TokenInterface getCurrent() {
      */
     public void next() {
         this.position ++;
-        if (!this.isAtEnd()) {
+
+        if (this.isAtEnd()) {
+            this.position = this.tokens.size();
+        } else {
             this.current = Optional.of(this.tokens.get(this.position));
             this.lexedText += this.tokens.get(this.position).getText();
         }

src/main/java/emailvalidator4j/parser/DomainPart.java

@@ -27,6 +27,11 @@ final class DomainPart extends Parser {
     @Override
     public void parse(String domainPart) throws InvalidEmail {
         this.lexer.lex(domainPart);
+
+        if(!this.lexer.getCurrent().equals(Tokens.AT)) {
+            throw new ExpectedAT("Missing AT token");
+        }
+
         this.lexer.next();
 
         if (this.lexer.getCurrent().equals(Tokens.DOT)) {
@@ -259,6 +264,7 @@ private void parseLiteralPart() throws InvalidEmail {
             }
 
         } while(!this.lexer.isAtEnd() && !this.lexer.isNextToken(Tokens.CLOSEBRACKET));
+
         this.warnings.add(Warnings.RFC5321_ADDRESS_LITERAL);
         addressLiteral = this.lexer.lexedText().replace('[', '\0').replace(']', '\0');
         //Remove the initial @
@@ -267,7 +273,11 @@ private void parseLiteralPart() throws InvalidEmail {
         } else {
             this.warnings.add(Warnings.RFC5322_DOMAIN_LITERAL);
         }
+
         this.lexer.next();
+        if (!Tokens.CLOSEBRACKET.equals(this.lexer.getCurrent())) {
+            throw new ExpectedDTEXT("CLOSEBRACKET");
+        }
     }
 
     private boolean isObsoleteDTEXT() {

src/main/java/emailvalidator4j/parser/LocalPart.java

@@ -27,7 +27,7 @@ public void parse(String localpart) throws InvalidEmail {
             throw new DotAtStart("Found DOT at start");
         }
 
-        while (!this.lexer.getCurrent().equals(Tokens.AT)) {
+        while (!this.lexer.getCurrent().equals(Tokens.AT) && !this.lexer.isAtEnd()) {
             closingQuote = this.checkDoubleQuote(closingQuote);
             if (closingQuote && parseDQuote) {
                 this.lexer.next();

src/test/java/emailvalidator4j/EmailValidatorTest.java

@@ -57,6 +57,9 @@ public static Object[][] invalidEmailProvider() {
                 {"comment(example))@example.com"},
                 {"example@example)comment.com"},
                 {"example@example(comment)).com"},
+                {"example@[1.2.3.4"},
+                {"example@[IPv6:1:2:3:4:5:6:7:8"},
+                {"exam(ple@exam).ple"},
                 {"example@(example))comment.com"}
 
         };
@@ -66,7 +69,7 @@ public static Object[][] invalidEmailProvider() {
     @UseDataProvider("invalidEmailProvider")
     public void isInvalidEmail(String email) {
         EmailValidator validator = new EmailValidator();
-        Assert.assertFalse(email + " is an invalid email", validator.isValid(email));
+        Assert.assertFalse(email + " should be an invalid email", validator.isValid(email));
     }
 
     @DataProvider
@@ -93,6 +96,7 @@ public static Object[][] validEmailsProvider() {
                 {"\"\\a\"@iana.org"},
                 {"\"test\\ test\"@iana.org"},
                 {"\"\"@iana.org"},
+                {"\"\"@[]"}/* kind of an edge case, valid for RFC 5322 but address literal is not for 5321 */,
                 {String.format("\"\\%s\"@iana.org", "\"")},
         };
     }
@@ -101,7 +105,7 @@ public static Object[][] validEmailsProvider() {
     @UseDataProvider("validEmailsProvider")
     public void isValidEmail(String validEmail) {
         EmailValidator validator = new EmailValidator();
-        Assert.assertTrue(validEmail + " is a valid email", validator.isValid(validEmail));
+        Assert.assertTrue(validEmail + " should be a valid email", validator.isValid(validEmail));
     }
 
     @Test