test: add explicit no wheel grpcio test

tests/default.nix

@@ -155,5 +155,6 @@ builtins.removeAttrs
   virtualenv-pre-20-18 = callTest ./virtualenv-pre-20-18 { };
   virtualenv-post-20-18 = callTest ./virtualenv-post-20-18 { };
   grpcio-wheel = callTest ./grpcio-wheel { };
+  grpcio-no-wheel = callTest ./grpcio-no-wheel { };
 }
   skipTests

tests/grpcio-no-wheel/default.nix

@@ -0,0 +1,22 @@
+{ lib, poetry2nix, python3, runCommand }:
+let
+  env = poetry2nix.mkPoetryEnv {
+    python = python3;
+    pyproject = ./pyproject.toml;
+    poetrylock = ./poetry.lock;
+    preferWheels = true;
+    overrides = poetry2nix.overrides.withDefaults (
+      self: super: {
+        grpcio = super.grpcio.override {
+          preferWheel = false;
+        };
+      }
+    );
+  };
+
+  isWheelGrpcIO = env.python.pkgs.grpcio.src.isWheel;
+
+in
+assert (!isWheelGrpcIO); runCommand "grpcio-wheel" { } ''
+  ${env}/bin/python -c 'import grpc; print(grpc.__version__)' > $out
+''

tests/grpcio-no-wheel/pyproject.toml

@@ -0,0 +1,13 @@
+[tool.poetry]
+name = "test-grpcio-wheel"
+version = "0.1.0"
+description = "Test of wheel for grpcio"
+authors = ["Your Name <[email protected]>"]
+
+[tool.poetry.dependencies]
+python = "^3.9"
+grpcio = "^1.51.1"
+
+[build-system]
+requires = ["poetry-core>=1"]
+build-backend = "poetry.core.masonry.api"

tests/grpcio-wheel/default.nix

@@ -4,18 +4,17 @@ let
     python = python3;
     pyproject = ./pyproject.toml;
     poetrylock = ./poetry.lock;
-    overrides = poetry2nix.overrides.withDefaults
-      # This is also in overrides.nix but repeated for completeness
-      (
-        self: super: {
-          grpcio = super.grpcio.override {
-            preferWheel = true;
-          };
-        }
-      );
+    preferWheels = false;
+    overrides = poetry2nix.overrides.withDefaults (
+      self: super: {
+        grpcio = super.grpcio.override {
+          preferWheel = true;
+        };
+      }
+    );
   };
 
-  isWheelGrpcIO = env.python.pkgs.grpcio.src.isWheel or false;
+  isWheelGrpcIO = env.python.pkgs.grpcio.src.isWheel;
 
 in
 assert isWheelGrpcIO; runCommand "grpcio-wheel" { } ''