WIP: Add mypy tests (#737)

* Add basic mypy tests

* Only run mypy on 3.6+

* No pypy

* Fix things

* Oooh parametrized

1 files changed, 23 insertions, 0 deletions

diff --git a/tests/test_mypy.yml b/tests/test_mypy.yml
new file mode 100644
index 0000000..18128e6
--- /dev/null
+++ b/tests/test_mypy.yml
@@ -0,0 +1,23 @@
+- case: attr_s_with_type_argument
+  parametrized:
+    - val: 'a = attr.ib(type=int)'
+    - val: 'a: int = attr.ib()'
+  main: |
+    import attr
+    @attr.s
+    class C:
+        {{ val }}
+    C()  # E: Too few arguments for "C"
+    C(1)
+    C(a=1)
+    C(a="hi")  # E: Argument "a" to "C" has incompatible type "str"; expected "int"
+- case: attr_s_with_type_annotations
+  main : |
+    import attr
+    @attr.s
+    class C:
+      a: int = attr.ib()
+    C()  # E: Too few arguments for "C"
+    C(1)
+    C(a=1)
+    C(a="hi")  # E: Argument "a" to "C" has incompatible type "str"; expected "int"