Fail at parametrize option for empty parameter set

Optionally raise an exception when parametrize collects no arguments.
Provide the name of the test causing the failure in the exception
message.

See: #3849

src/_pytest/mark/__init__.py

@@ -163,9 +163,9 @@ def pytest_configure(config):
 
     empty_parameterset = config.getini(EMPTY_PARAMETERSET_OPTION)
 
-    if empty_parameterset not in ("skip", "xfail", None, ""):
+    if empty_parameterset not in ("skip", "xfail", "fail_at_collect", None, ""):
         raise UsageError(
-            "{!s} must be one of skip and xfail,"
+            "{!s} must be one of skip, xfail or fail_at_collect"
             " but it is {!r}".format(EMPTY_PARAMETERSET_OPTION, empty_parameterset)
         )
 

src/_pytest/mark/structures.py

@@ -32,11 +32,19 @@ def istestfunc(func):
 
 
 def get_empty_parameterset_mark(config, argnames, func):
+    from ..nodes import Collector
+
     requested_mark = config.getini(EMPTY_PARAMETERSET_OPTION)
     if requested_mark in ("", None, "skip"):
         mark = MARK_GEN.skip
     elif requested_mark == "xfail":
         mark = MARK_GEN.xfail(run=False)
+    elif requested_mark == "fail_at_collect":
+        f_name = func.__name__
+        _, lineno = getfslineno(func)
+        raise Collector.CollectError(
+            "Empty parameter set in '%s' at line %d" % (f_name, lineno)
+        )
     else:
         raise LookupError(requested_mark)
     fs, lineno = getfslineno(func)

testing/test_mark.py

@@ -13,7 +13,7 @@ from _pytest.mark import (
     transfer_markers,
     EMPTY_PARAMETERSET_OPTION,
 )
-from _pytest.nodes import Node
+from _pytest.nodes import Node, Collector
 
 ignore_markinfo = pytest.mark.filterwarnings(
     "ignore:MarkInfo objects:pytest.RemovedInPytest4Warning"
@@ -1091,7 +1091,14 @@ class TestMarkDecorator(object):
 @pytest.mark.parametrize("mark", [None, "", "skip", "xfail"])
 def test_parameterset_for_parametrize_marks(testdir, mark):
     if mark is not None:
-        testdir.makeini("[pytest]\n{}={}".format(EMPTY_PARAMETERSET_OPTION, mark))
+        testdir.makeini(
+            """
+        [pytest]
+        {}={}
+        """.format(
+                EMPTY_PARAMETERSET_OPTION, mark
+            )
+        )
 
     config = testdir.parseconfig()
     from _pytest.mark import pytest_configure, get_empty_parameterset_mark
@@ -1107,6 +1114,34 @@ def test_parameterset_for_parametrize_marks(testdir, mark):
         assert result_mark.kwargs.get("run") is False
 
 
+def test_parameterset_for_fail_at_collect(testdir):
+    testdir.makeini(
+        """
+    [pytest]
+    {}=fail_at_collect
+    """.format(
+            EMPTY_PARAMETERSET_OPTION
+        )
+    )
+
+    config = testdir.parseconfig()
+    from _pytest.mark import pytest_configure, get_empty_parameterset_mark
+    from _pytest.compat import getfslineno
+
+    pytest_configure(config)
+
+    test_func = all
+    func_name = test_func.__name__
+    _, func_lineno = getfslineno(test_func)
+    expected_errmsg = r"Empty parameter set in '%s' at line %d" % (
+        func_name,
+        func_lineno,
+    )
+
+    with pytest.raises(Collector.CollectError, match=expected_errmsg):
+        get_empty_parameterset_mark(config, ["a"], test_func)
+
+
 def test_parameterset_for_parametrize_bad_markname(testdir):
     with pytest.raises(pytest.UsageError):
         test_parameterset_for_parametrize_marks(testdir, "bad")