Allow overriding instance flags in tests (#7374)

examples/features/src/ray_cube_compute/mod.rs

@@ -493,11 +493,11 @@ static TEST: crate::framework::ExampleTestParams = crate::framework::ExampleTest
     base_test_parameters: wgpu_test::TestParameters {
         required_features: <Example as crate::framework::Example>::required_features(),
         required_limits: <Example as crate::framework::Example>::required_limits(),
-        force_fxc: false,
         skips: vec![],
         failures: Vec::new(),
         required_downlevel_caps:
             <Example as crate::framework::Example>::required_downlevel_capabilities(),
+        ..Default::default()
     },
     comparisons: &[wgpu_test::ComparisonType::Mean(0.02)],
     _phantom: std::marker::PhantomData::<Example>,

examples/features/src/ray_cube_fragment/mod.rs

@@ -380,11 +380,11 @@ static TEST: crate::framework::ExampleTestParams = crate::framework::ExampleTest
     base_test_parameters: wgpu_test::TestParameters {
         required_features: <Example as crate::framework::Example>::required_features(),
         required_limits: <Example as crate::framework::Example>::required_limits(),
-        force_fxc: false,
         skips: vec![],
         failures: Vec::new(),
         required_downlevel_caps:
             <Example as crate::framework::Example>::required_downlevel_capabilities(),
+        ..Default::default()
     },
     comparisons: &[wgpu_test::ComparisonType::Mean(0.02)],
     _phantom: std::marker::PhantomData::<Example>,

examples/features/src/ray_cube_normals/mod.rs

@@ -486,6 +486,7 @@ static TEST: crate::framework::ExampleTestParams = crate::framework::ExampleTest
         failures: Vec::new(),
         required_downlevel_caps:
             <Example as crate::framework::Example>::required_downlevel_capabilities(),
+        ..Default::default()
     },
     comparisons: &[wgpu_test::ComparisonType::Mean(0.02)],
     _phantom: std::marker::PhantomData::<Example>,

examples/features/src/ray_scene/mod.rs

@@ -560,11 +560,11 @@ static TEST: crate::framework::ExampleTestParams = crate::framework::ExampleTest
     base_test_parameters: wgpu_test::TestParameters {
         required_features: <Example as crate::framework::Example>::required_features(),
         required_limits: <Example as crate::framework::Example>::required_limits(),
-        force_fxc: false,
         skips: vec![],
         failures: Vec::new(),
         required_downlevel_caps:
             <Example as crate::framework::Example>::required_downlevel_capabilities(),
+        ..Default::default()
     },
     comparisons: &[wgpu_test::ComparisonType::Mean(0.02)],
     _phantom: std::marker::PhantomData::<Example>,

examples/features/src/ray_shadows/mod.rs

@@ -380,7 +380,7 @@ static TEST: crate::framework::ExampleTestParams = crate::framework::ExampleTest
         failures: Vec::new(),
         required_downlevel_caps:
             <Example as crate::framework::Example>::required_downlevel_capabilities(),
-        force_fxc: false,
+        ..Default::default()
     },
     comparisons: &[wgpu_test::ComparisonType::Mean(0.02)],
     _phantom: std::marker::PhantomData::<Example>,

examples/features/src/ray_traced_triangle/mod.rs

@@ -439,6 +439,7 @@ static TEST: crate::framework::ExampleTestParams = crate::framework::ExampleTest
         failures: Vec::new(),
         required_downlevel_caps:
             <Example as crate::framework::Example>::required_downlevel_capabilities(),
+        ..Default::default()
     },
     comparisons: &[wgpu_test::ComparisonType::Mean(0.02)],
     _phantom: std::marker::PhantomData::<Example>,

tests/gpu-tests/create_surface_error.rs

@@ -6,7 +6,10 @@
 #[wasm_bindgen_test::wasm_bindgen_test]
 fn canvas_get_context_returned_null() {
     // Not using the normal testing infrastructure because that goes straight to creating the canvas for us.
-    let instance = wgpu_test::initialize_instance(wgpu::Backends::all(), false);
+    let instance = wgpu_test::initialize_instance(
+        wgpu::Backends::all(),
+        &wgpu_test::TestParameters::default(),
+    );
     // Create canvas
     let canvas = wgpu_test::initialize_html_canvas();
 

tests/gpu-tests/device.rs

@@ -102,7 +102,8 @@ static REQUEST_DEVICE_ERROR_MESSAGE_NATIVE: GpuTestConfiguration = GpuTestConfig
 async fn request_device_error_message() {
     // Not using initialize_test() because that doesn't let us catch the error
     // nor .await anything
-    let (_instance, adapter, _surface_guard) = wgpu_test::initialize_adapter(None, false).await;
+    let (_instance, adapter, _surface_guard) =
+        wgpu_test::initialize_adapter(None, &TestParameters::default()).await;
 
     let device_error = adapter
         .request_device(&wgpu::DeviceDescriptor {

tests/src/init.rs

@@ -1,6 +1,6 @@
 use wgpu::{Adapter, Backends, Device, Features, Instance, Limits, Queue};
 
-use crate::report::AdapterReport;
+use crate::{report::AdapterReport, TestParameters};
 
 /// Initialize the logger for the test runner.
 pub fn init_logger() {
@@ -12,7 +12,7 @@ pub fn init_logger() {
 }
 
 /// Initialize a wgpu instance with the options from the environment.
-pub fn initialize_instance(backends: wgpu::Backends, force_fxc: bool) -> Instance {
+pub fn initialize_instance(backends: wgpu::Backends, params: &TestParameters) -> Instance {
     // We ignore `WGPU_BACKEND` for now, merely using test filtering to only run a single backend's tests.
     //
     // We can potentially work support back into the test runner in the future, but as the adapters are matched up
@@ -30,14 +30,19 @@ pub fn initialize_instance(backends: wgpu::Backends, force_fxc: bool) -> Instanc
     };
     // Some tests need to be able to force demote to FXC, to specifically test workarounds for FXC
     // behavior.
-    let dx12_shader_compiler = if force_fxc {
+    let dx12_shader_compiler = if params.force_fxc {
         wgpu::Dx12Compiler::Fxc
     } else {
         wgpu::Dx12Compiler::from_env().unwrap_or(wgpu::Dx12Compiler::StaticDxc)
     };
+    // The defaults for debugging, overridden by the environment, overridden by the test parameters.
+    let flags = wgpu::InstanceFlags::debugging()
+        .with_env()
+        .union(params.required_instance_flags);
+
     Instance::new(&wgpu::InstanceDescriptor {
         backends,
-        flags: wgpu::InstanceFlags::debugging().with_env(),
+        flags,
         backend_options: wgpu::BackendOptions {
             dx12: wgpu::Dx12BackendOptions {
                 shader_compiler: dx12_shader_compiler,
@@ -65,13 +70,13 @@ pub fn initialize_instance(backends: wgpu::Backends, force_fxc: bool) -> Instanc
 /// Initialize a wgpu adapter, using the given adapter report to match the adapter.
 pub async fn initialize_adapter(
     adapter_report: Option<&AdapterReport>,
-    force_fxc: bool,
+    params: &TestParameters,
 ) -> (Instance, Adapter, Option<SurfaceGuard>) {
     let backends = adapter_report
         .map(|report| Backends::from(report.info.backend))
         .unwrap_or_default();
 
-    let instance = initialize_instance(backends, force_fxc);
+    let instance = initialize_instance(backends, params);
     #[allow(unused_variables)]
     let surface: Option<wgpu::Surface>;
     let surface_guard: Option<SurfaceGuard>;

tests/src/params.rs

@@ -1,5 +1,5 @@
 use arrayvec::ArrayVec;
-use wgpu::{DownlevelCapabilities, DownlevelFlags, Features, Limits};
+use wgpu::{DownlevelCapabilities, DownlevelFlags, Features, InstanceFlags, Limits};
 
 use crate::{
     report::AdapterReport, FailureApplicationReasons, FailureBehavior, FailureCase,
@@ -19,6 +19,8 @@ pub struct TestParameters {
     pub required_downlevel_caps: DownlevelCapabilities,
     pub required_limits: Limits,
 
+    pub required_instance_flags: InstanceFlags,
+
     /// On Dx12, specifically test against the Fxc compiler.
     ///
     /// For testing workarounds to Fxc bugs.
@@ -37,6 +39,7 @@ impl Default for TestParameters {
             required_features: Features::empty(),
             required_downlevel_caps: LOWEST_DOWNLEVEL_PROPERTIES,
             required_limits: Limits::downlevel_webgl2_defaults(),
+            required_instance_flags: InstanceFlags::empty(),
             force_fxc: false,
             skips: Vec::new(),
             failures: Vec::new(),
@@ -69,6 +72,12 @@ impl TestParameters {
         self
     }
 
+    /// Sets the instance flags that the test requires.
+    pub fn instance_flags(mut self, instance_flags: InstanceFlags) -> Self {
+        self.required_instance_flags |= instance_flags;
+        self
+    }
+
     pub fn force_fxc(mut self, force_fxc: bool) -> Self {
         self.force_fxc = force_fxc;
         self

tests/src/run.rs

@@ -43,7 +43,7 @@ pub async fn execute_test(
     let _test_guard = isolation::OneTestPerProcessGuard::new();
 
     let (instance, adapter, _surface_guard) =
-        initialize_adapter(adapter_report, config.params.force_fxc).await;
+        initialize_adapter(adapter_report, &config.params).await;
 
     let adapter_info = adapter.get_info();
     let adapter_downlevel_capabilities = adapter.get_downlevel_capabilities();