Add support for partials and path segments for Handlebars.

This introduces support for some missing features to the Handlebars lexer:
Partials and path segments. Partials mostly appeared to work before, but the
`>` in `{{> ... }}` would appear as a syntax error, as could other
components of the partial. This change introduces support for:

* Standard partials: `{{> partialName}}`
* Partials with parameters: `{{> partialName varname="value"}}`
* Ddynamic partials: `{{> (partialFunc)}}`
* Ddynamic partials with lookups: `{{> (lookup ../path "partialName")}}`
* Partial blocks: `{{> @partial-block}}`
* Inline partials: `{{#*inline}}..{{/inline}}`

It also introduces support for path segments, which can reference content in
the current context or in a parent context. For instance, `this.name`,
`this/name`, `./name`, `../name`, `this/name`, etc. These are all now tracked
as variables.

1 files changed, 74 insertions, 0 deletions

diff --git a/tests/test_sql.py b/tests/test_sql.py
new file mode 100644
index 00000000..c5f5c758
--- /dev/null
+++ b/tests/test_sql.py
@@ -0,0 +1,74 @@
+# -*- coding: utf-8 -*-
+"""
+    Pygments SQL lexers tests
+    ~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    :copyright: Copyright 2006-2016 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+import unittest
+
+from pygments.lexers.sql import TransactSqlLexer
+from pygments.token import Comment, Name, Number, Punctuation, Whitespace
+
+
+class TransactSqlLexerTest(unittest.TestCase):
+
+    def setUp(self):
+        self.lexer = TransactSqlLexer()
+
+    def _assertAreTokensOfType(self, examples, expected_token_type):
+        for test_number, example in enumerate(examples.split(), 1):
+            token_count = 0
+            for token_type, token_value in self.lexer.get_tokens(example):
+                if token_type != Whitespace:
+                    token_count += 1
+                    self.assertEqual(
+                        token_type, expected_token_type,
+                        'token_type #%d for %s is be %s but must be %s' %
+                        (test_number, token_value, token_type, expected_token_type))
+            self.assertEqual(
+                token_count, 1,
+                '%s must yield exactly 1 token instead of %d' %
+                (example, token_count))
+
+    def _assertTokensMatch(self, text, expected_tokens_without_trailing_newline):
+        actual_tokens = tuple(self.lexer.get_tokens(text))
+        if (len(actual_tokens) >= 1) and (actual_tokens[-1] == (Whitespace, '\n')):
+            actual_tokens = tuple(actual_tokens[:-1])
+        self.assertEqual(
+            expected_tokens_without_trailing_newline, actual_tokens,
+            'text must yield expected tokens: %s' % text)
+
+    def test_can_lex_float(self):
+        self._assertAreTokensOfType(
+            '1. 1.e1 .1 1.2 1.2e3 1.2e+3 1.2e-3 1e2', Number.Float)
+        self._assertTokensMatch(
+            '1e2.1e2',
+            ((Number.Float, '1e2'), (Number.Float, '.1e2'))
+        )
+
+    def test_can_reject_almost_float(self):
+        self._assertTokensMatch(
+            '.e1',
+            ((Punctuation, '.'), (Name, 'e1')))
+
+    def test_can_lex_integer(self):
+        self._assertAreTokensOfType(
+            '1 23 456', Number.Integer)
+
+    def test_can_lex_names(self):
+        self._assertAreTokensOfType(
+            u'thingy thingy123 _thingy _ _123 Ähnliches Müll #temp1 ##temp2', Name)
+
+    def test_can_lex_comments(self):
+        self._assertTokensMatch('--\n', ((Comment.Single, '--\n'),))
+        self._assertTokensMatch('/**/', (
+            (Comment.Multiline, '/*'), (Comment.Multiline, '*/')
+        ))
+        self._assertTokensMatch('/*/**/*/', (
+            (Comment.Multiline, '/*'),
+            (Comment.Multiline, '/*'),
+            (Comment.Multiline, '*/'),
+            (Comment.Multiline, '*/'),
+        ))