Expose tox requires via the config object (#1919)

Fixes https://github.com/tox-dev/tox/issues/1918

This also fixes broken __str__ of MissingRequirement,
which is never actually used but is helpful when debugging.

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/unit/session/test_provision.py b/tests/unit/session/test_provision.py
index 30659324..cb7bd9b5 100644
--- a/tests/unit/session/test_provision.py
+++ b/tests/unit/session/test_provision.py
@@ -47,6 +47,35 @@ def test_provision_min_version_is_requires(newconfig, next_tox_major):
     assert config.ignore_basepython_conflict is False
 
 
+def test_provision_config_has_minversion_and_requires(newconfig, next_tox_major):
+    with pytest.raises(MissingRequirement) as context:
+        newconfig(
+            [],
+            """\
+            [tox]
+            minversion = {}
+            requires =
+                setuptools > 2
+                pip > 3
+            """.format(
+                next_tox_major,
+            ),
+        )
+    config = context.value.config
+
+    assert config.run_provision is True
+    assert config.minversion == next_tox_major
+    assert config.requires == ["setuptools > 2", "pip > 3"]
+
+
+def test_provision_config_empty_minversion_and_requires(newconfig, next_tox_major):
+    config = newconfig([], "")
+
+    assert config.run_provision is False
+    assert config.minversion is None
+    assert config.requires == []
+
+
 def test_provision_tox_change_name(newconfig):
     config = newconfig(
         [],