difftest: compile difftest in ci before running

Author: Firestar99

.config/nextest.toml

@@ -4,6 +4,7 @@ fail-fast = false
 
 [profile.difftests]
 default-filter = 'package(difftests)'
+slow-timeout = "2m"
 
 [profile.difftest-runner]
 default-filter = 'package(difftest-runner) | package(difftest-types)'

.github/workflows/ci.yaml

@@ -181,6 +181,8 @@ jobs:
         run: cargo fetch --locked --target $TARGET
       - name: cargo fetch --locked difftests
         run: cargo fetch --locked --manifest-path=tests/difftests/tests/Cargo.toml --target $TARGET
+      - name: build difftests (without shaders)
+        run: cargo nextest run -P difftests -p difftests --release --no-default-features --features "use-installed-tools" --no-run
       - name: difftests
         run: cargo nextest run -P difftests -p difftests --release --no-default-features --features "use-installed-tools"