Add a bunch of tests for Vulkan

Test.hs

@@ -8,11 +8,19 @@ import Data.Text (Text)
 import Control.Monad.IO.Class (liftIO)
 import Data.List (find)
 
-currentChannel = "channel:nixos-19.03-small"
+-- nixos-19-09 is used so hopefully it will have a different libc than
+-- the current `<nixpkgs>` used in a current nixOS system, so it will trigger the
+-- driver failure.
+-- Run `./Test.hs --match "/Sanity/"` to ensure that non wrapped
+-- binaries fails on NixOS.
+
+currentChannel = "channel:nixos-19.09-small"
 
 -- | Utils function: run a command and returns its output.
 processOutput p args = Text.strip . Text.pack <$> readProcess (Text.unpack p) (Text.unpack <$> args) ""
 
+-- * OpenGL
+
 -- | Returns the path to the nixGLXXX binary.
 getNixGLBin version = (<>("/bin/"<>version)) <$> processOutput "nix-build" ["./", "-A", version, "--arg", "pkgs", "import (fetchTarball " <> currentChannel <> ")"]
 
@@ -32,31 +40,72 @@ checkOpenGL_32_64 glxinfo32 glxinfo64 vendorName nixGLName = do
       Just vendorString <- getVendorString (processOutput nixGLBin [glxinfo64, "-B"])
       vendorString `shouldContain` vendorName
 
+-- * Vulkan
+
+-- | Returns the vendor string associated with a glxinfo wrapped by a nixGL.
+getVulkanVendorString io = do
+  output <- Text.lines <$> io
+  pure $ Text.unpack <$> find ("driverName"`Text.isInfixOf`) output
+
+-- | Checks that a nixGL wrapper works with glxinfo 32 & 64 bits.
+checkVulkan_32_64 vulkaninfo32 vulkaninfo64 vendorName nixGLName = do
+  beforeAll (getNixGLBin nixGLName) $ do
+    it "32 bits" $ \nixGLBin -> do
+      Just vendorString <- getVulkanVendorString (processOutput nixGLBin [vulkaninfo32])
+      vendorString `shouldContain` vendorName
+
+    it "64 bits" $ \nixGLBin -> do
+      Just vendorString <- getVulkanVendorString (processOutput nixGLBin [vulkaninfo64])
+      vendorString `shouldContain` vendorName
+
+
 main = do
-  -- nixos-18-03 is used so hopefully it will have a different libc
-  -- than the one used in current nixOS system, so it will trigger the
-  -- driver failure.
   glxinfo64 <- (<>"/bin/glxinfo") <$> processOutput "nix-build" [currentChannel, "-A", "glxinfo"]
   glxinfo32 <- (<>"/bin/glxinfo") <$> processOutput "nix-build" [currentChannel, "-A", "pkgsi686Linux.glxinfo"]
 
+  vulkaninfo64 <- (<>"/bin/vulkaninfo") <$> processOutput "nix-build" [currentChannel, "-A", "vulkan-tools"]
+  vulkaninfo32 <- (<>"/bin/vulkaninfo") <$> processOutput "nix-build" [currentChannel, "-A", "pkgsi686Linux.vulkan-tools"]
+
   let checkOpenGL = checkOpenGL_32_64 glxinfo32 glxinfo64
+      checkVulkan = checkVulkan_32_64 vulkaninfo32 vulkaninfo64
 
   hspec $ do
-    describe "Must fail" $ do
-      it "fails with unwrapped glxinfo64" $ do
-        vendorString <- getVendorString (processOutput glxinfo64 [])
-        vendorString `shouldBe` Nothing
+    -- This category ensure that tests are failing if not run with nixGL
+    -- This allows testing on nixOS
+    describe "Sanity" $ do
+      describe "OpenGL" $ do
+        it "fails with unwrapped glxinfo64" $ do
+          vendorString <- getVendorString (processOutput glxinfo64 ["-B"])
+          vendorString `shouldBe` Nothing
 
-      it "fails with unwrapped glxinfo32" $ do
-        vendorString <- getVendorString (processOutput glxinfo32 [])
-        vendorString `shouldBe` Nothing
-    describe "Mesa" $ do
-      checkOpenGL "Mesa" "nixGLIntel"
-    describe "Nvidia - Bumblebee" $ do
-      checkOpenGL "NVIDIA" "nixGLNvidiaBumblebee"
+        it "fails with unwrapped glxinfo32" $ do
+          vendorString <- getVendorString (processOutput glxinfo32 ["-B"])
+          vendorString `shouldBe` Nothing
+      describe "Vulkan" $ do
+        it "fails with unwrapped vulkaninfo64" $ do
+          getVulkanVendorString (processOutput vulkaninfo64 []) `shouldThrow` anyIOException
 
-    -- TODO: check Nvidia (I don't have this hardware)
-    describe "Nvidia" $ do
-      checkOpenGL "NVIDIA" "nixGLNvidia"
+        it "fails with unwrapped vulkaninfo32" $ do
+          getVulkanVendorString (processOutput vulkaninfo32 []) `shouldThrow` anyIOException
 
-    -- TODO: check vulkan (I don't have vulkan compatible hardware)
+    describe "NixGL" $ do
+      describe "Mesa" $ do
+        describe "OpenGL" $ do
+          checkOpenGL "Mesa" "nixGLIntel"
+        describe "Vulkan" $ do
+          checkVulkan "Mesa" "nixVulkanIntel"
+
+      describe "Nvidia - Bumblebee" $ do
+        describe "OpenGL" $ do
+          checkOpenGL "NVIDIA" "nixGLNvidiaBumblebee"
+        describe "Vulkan" $ do
+          -- Not tested: I don't have the hardware (@guibou)
+          checkVulkan "NVIDIA" "nixVulkanNvidiaBumblebee"
+
+      -- TODO: check Nvidia (I don't have this hardware)
+      describe "Nvidia" $ do
+        describe "OpenGL" $ do
+          checkOpenGL "NVIDIA" "nixGLNvidia"
+        describe "Vulkan" $ do
+          describe "Nvidia" $ do
+          checkVulkan "NVIDIA" "nixVulkanNvidia"