Move the last test out of test_regressions and delete the file

This also deletes a test that probably has become useful because the issue it tested was caused by code that doesn't exist anymore

test/test_api/test_api.py

@@ -273,3 +273,15 @@ def test_no_statement_parent(Script):
     defs = Script(source, column=3).goto_definitions()
     defs = sorted(defs, key=lambda d: d.line)
     assert [d.description for d in defs] == ['def f', 'class C']
+
+
+def test_backslash_continuation_and_bracket(Script):
+    code = dedent(r"""
+    x = 0
+    a = \
+      [1, 2, 3, (x)]""")
+
+    lines = code.splitlines()
+    column = lines[-1].index('(')
+    def_, = Script(code, line=len(lines), column=column).goto_definitions()
+    assert def_.name == 'int'

test/test_api/test_settings.py

@@ -4,7 +4,7 @@ import pytest
 
 from jedi import api
 from jedi.evaluate import imports
-from .helpers import cwd_at
+from ..helpers import cwd_at
 
 
 @pytest.mark.skipif('True', reason='Skip for now, test case is not really supported.')

test/test_regression.py

@@ -1,50 +0,0 @@
-"""
-Unit tests to avoid errors of the past. These are also all tests that didn't
-found a good place in any other testing module.
-"""
-
-import textwrap
-
-
-def check_definition_by_marker(Script, source, after_cursor, names):
-    r"""
-    Find definitions specified by `after_cursor` and check what found
-
-    For example, for the following configuration, you can pass
-    ``after_cursor = 'y)'``.::
-
-        function(
-            x, y)
-               \
-                `- You want cursor to be here
-    """
-    source = textwrap.dedent(source)
-    for (i, line) in enumerate(source.splitlines()):
-        if after_cursor in line:
-            break
-    column = len(line) - len(after_cursor)
-    defs = Script(source, i + 1, column).goto_definitions()
-    assert [d.name for d in defs] == names
-
-
-def test_backslash_continuation(Script):
-    """
-    Test that ModuleWithCursor.get_path_until_cursor handles continuation
-    """
-    check_definition_by_marker(Script, r"""
-    x = 0
-    a = \
-      [1, 2, 3, 4, 5, 6, 7, 8, 9, x]  # <-- here
-    """, ']  # <-- here', ['int'])
-
-    # completion in whitespace
-    s = 'asdfxyxxxxxxxx sds\\\n    hello'
-    assert Script(s, 2, 4).goto_assignments() == []
-
-
-def test_backslash_continuation_and_bracket(Script):
-    check_definition_by_marker(Script, r"""
-    x = 0
-    a = \
-      [1, 2, 3, 4, 5, 6, 7, 8, 9, (x)]  # <-- here
-    """, '(x)]  # <-- here', ['int'])