Throw a more useful exception on token unexpected in raw text (#31)

* Debug Token to string conversion error
* Check each chunk in lines analysis

src/Phug/Lexer/Analyzer/LineAnalyzer.php

@@ -6,6 +6,7 @@
 use Phug\Lexer\Scanner\InterpolationScanner;
 use Phug\Lexer\State;
 use Phug\Lexer\Token\TextToken;
+use Phug\Lexer\TokenInterface;
 use Phug\Reader;
 
 class LineAnalyzer
@@ -175,6 +176,12 @@ public function getLines()
     public function getFlatLines()
     {
         return array_map(function ($line) {
+            foreach ($line as $chunk) {
+                if ($chunk instanceof TokenInterface) {
+                    $this->state->throwException('Unexpected '.get_class($chunk).' inside raw text.');
+                }
+            }
+
             return implode('', $line);
         }, $this->lines);
     }

tests/Phug/Lexer/Scanner/InterpolationScannerTest.php

@@ -2,6 +2,8 @@
 
 namespace Phug\Test\Lexer\Scanner;
 
+use Phug\Lexer\Analyzer\LineAnalyzer;
+use Phug\Lexer\State;
 use Phug\Lexer\Token\ExpressionToken;
 use Phug\Lexer\Token\IndentToken;
 use Phug\Lexer\Token\InterpolationEndToken;
@@ -11,7 +13,9 @@
 use Phug\Lexer\Token\TagInterpolationStartToken;
 use Phug\Lexer\Token\TagToken;
 use Phug\Lexer\Token\TextToken;
+use Phug\Reader;
 use Phug\Test\AbstractLexerTest;
+use Phug\Util\SourceLocation;
 
 class InterpolationScannerTest extends AbstractLexerTest
 {
@@ -131,4 +135,19 @@ public function testScan()
             TextToken::class,
         ]);
     }
+
+    /**
+     * @expectedException        \Phug\LexerException
+     * @expectedExceptionMessage Failed to lex: Unexpected Phug\Lexer\Token\InterpolationStartToken inside raw text.
+     */
+    public function testTokenInLineAnalyzer()
+    {
+        $input = 'p #{42}';
+        $analyzer = new LineAnalyzer(new State($this->lexer, $input, []), new Reader($input), [
+            [
+                new InterpolationStartToken(new SourceLocation('foo.pug', 12, 43)),
+            ],
+        ]);
+        $analyzer->getFlatLines();
+    }
 }