Added more parser escape sequence tests

Author: GrahamCampbell

tests/Dotenv/ParserTest.php

@@ -15,6 +15,35 @@ public function testQuotesParse()
         $this->assertSame(['FOO', "BAR  \n"], Parser::parse("FOO=\"BAR  \n\""));
     }
 
+    public function testNewlineParse()
+    {
+        $this->assertSame(['FOO', "\n"], Parser::parse('FOO="\n"'));
+    }
+
+    public function testTabParse()
+    {
+        $this->assertSame(['FOO', "\t"], Parser::parse('FOO=\'\t\''));
+    }
+
+    public function testNonEscapeParse1()
+    {
+        $this->assertSame(['FOO', '\n\v'], Parser::parse('FOO=\n\v'));
+    }
+
+    public function testNonEscapeParse2()
+    {
+        $this->assertSame(['FOO', '\q'], Parser::parse('FOO=\q'));
+    }
+
+    /**
+     * @expectedException \Dotenv\Exception\InvalidFileException
+     * @expectedExceptionMessage Failed to parse dotenv file due to an unexpected escape sequence. Failed at ["\q"].
+     */
+    public function testBadEscapeParse()
+    {
+        Parser::parse('FOO="\q"');
+    }
+
     public function testWhitespaceParse()
     {
         $this->assertSame(['FOO', "\n"], Parser::parse("FOO=\"\n\""));