Update ClipSpaceTests to use WGSL

Bug: dawn:572
Change-Id: Iad55df4f39dfa91ef4554908acb9e2bb45703124
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/32502
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
diff --git a/src/tests/end2end/ClipSpaceTests.cpp b/src/tests/end2end/ClipSpaceTests.cpp
index cb58525..980fe1e 100644
--- a/src/tests/end2end/ClipSpaceTests.cpp
+++ b/src/tests/end2end/ClipSpaceTests.cpp
@@ -25,28 +25,31 @@
         // Draw two triangles:
         // 1. The depth value of the top-left one is >= 0.5
         // 2. The depth value of the bottom-right one is <= 0.5
-        const char* vs =
-            R"(#version 450
-            const vec3 pos[6] = vec3[6](vec3(-1.0f,  1.0f, 1.0f),
-                                        vec3(-1.0f, -1.0f, 0.5f),
-                                        vec3( 1.0f,  1.0f, 0.5f),
-                                        vec3( 1.0f,  1.0f, 0.5f),
-                                        vec3(-1.0f, -1.0f, 0.5f),
-                                        vec3( 1.0f, -1.0f, 0.0f));
-            void main() {
-                gl_Position = vec4(pos[gl_VertexIndex], 1.0);
-            })";
-        pipelineDescriptor.vertexStage.module =
-            utils::CreateShaderModule(device, utils::SingleShaderStage::Vertex, vs);
+        pipelineDescriptor.vertexStage.module = utils::CreateShaderModuleFromWGSL(device, R"(
+            const pos : array<vec3<f32>, 6> = array<vec3<f32>, 6>(
+                vec3<f32>(-1.0,  1.0, 1.0),
+                vec3<f32>(-1.0, -1.0, 0.5),
+                vec3<f32>( 1.0,  1.0, 0.5),
+                vec3<f32>( 1.0,  1.0, 0.5),
+                vec3<f32>(-1.0, -1.0, 0.5),
+                vec3<f32>( 1.0, -1.0, 0.0));
 
-        const char* fs =
-            R"(#version 450
-            layout(location = 0) out vec4 fragColor;
-            void main() {
-               fragColor = vec4(1.0, 0.0, 0.0, 1.0);
-            })";
-        pipelineDescriptor.cFragmentStage.module =
-            utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, fs);
+            [[builtin(vertex_idx)]] var<in> VertexIndex : i32;
+            [[builtin(position)]] var<out> Position : vec4<f32>;
+
+            [[stage(vertex)]]
+            fn main() -> void {
+                Position = vec4<f32>(pos[VertexIndex], 1.0);
+                return;
+            })");
+
+        pipelineDescriptor.cFragmentStage.module = utils::CreateShaderModuleFromWGSL(device, R"(
+            [[location(0)]] var<out> fragColor : vec4<f32>;;
+            [[stage(fragment)]]
+            fn main() -> void {
+               fragColor = vec4<f32>(1.0, 0.0, 0.0, 1.0);
+               return;
+            })");
 
         pipelineDescriptor.cDepthStencilState.depthCompare = wgpu::CompareFunction::LessEqual;
         pipelineDescriptor.depthStencilState = &pipelineDescriptor.cDepthStencilState;