Add a datapath replacement for spawning userscripts

This adds a `(datapath)` replacement for feature tests.

`(datapath)` will expand to the absolute path to the integration data
directory.

tests/helpers/utils.py

@@ -22,6 +22,7 @@
 
 import re
 import pprint
+import os.path
 
 
 def print_i(text, indent, error=False):
@@ -101,3 +102,14 @@ def pattern_match(*, pattern, value):
     """
     re_pattern = '.*'.join(re.escape(part) for part in pattern.split('*'))
     return re.fullmatch(re_pattern, value) is not None
+
+def abs_datapath(from_file):
+    """Returns the absolute datapath.
+
+    __FILE__ must be given as an argument
+
+    Return:
+        The absolute path to the tests/integration/data directory.
+    """
+    file_abs = os.path.abspath(os.path.dirname(from_file))
+    return os.path.join(file_abs, '..', 'data')

tests/integration/features/conftest.py

@@ -129,6 +129,8 @@ def run_command(quteproc, httpbin, command):
     else:
         count = None
     command = command.replace('(port)', str(httpbin.port))
+    command = command.replace('(datapath)', utils.abs_datapath(__file__))
+
     quteproc.send_cmd(command, count=count)
 
 
@@ -334,8 +336,8 @@ def check_contents(quteproc, filename):
     The filename is interpreted relative to tests/integration/data.
     """
     content = quteproc.get_content(plain=False)
-    path = os.path.join(os.path.abspath(os.path.dirname(__file__)), '..',
-                        'data', os.path.join(*filename.split('/')))
+    path = os.path.join(utils.abs_datapath(__file__),
+                        os.path.join(*filename.split('/')))
     with open(path, 'r', encoding='utf-8') as f:
         file_content = f.read()
         assert content == file_content

tests/integration/features/spawn.feature

@@ -17,7 +17,7 @@ Feature: :spawn
         Then "Executing echo with args ['about:blank'], userscript=False" should be logged
 
     Scenario: Running :spawn with userscript
-        When I run :spawn --userscript open_current_url
+        When I run :spawn --userscript (datapath)/userscripts/open_current_url
         And I wait until about:blank is loaded
         Then the following tabs should be open:
             - about:blank