tests: Add lzma feature and add a required_features.lzma flag

.github/workflows/test_rust.yml

@@ -76,7 +76,7 @@ jobs:
           RUSTDOCFLAGS: -D warnings
 
       - name: Run tests with image tests
-        run: cargo test --all --locked --features imgtests
+        run: cargo test --all --locked --features imgtests,lzma
         env:
           XDG_RUNTIME_DIR: '' # dummy value, just to silence warnings about it missing
 

tests/Cargo.toml

@@ -24,6 +24,7 @@ url = "2.3.1"
 # since the images we compare against are generated on CI, and may
 # not match your local machine's Vulkan version / image output.
 imgtests = ["ruffle_video_software"]
+lzma = ["ruffle_core/lzma"]
 
 [dev-dependencies]
 approx = "0.5.1"

tests/README.md

@@ -46,6 +46,10 @@ with_video = false # If this test requires a video decoder backend to run.
 [image_comparison]
 tolerance = 0 # The tolerance per pixel channel to be considered "the same". Increase as needed with tests that aren't pixel perfect across platforms.
 max_outliers = 0 # Maximum number of outliers allowed over the given tolerance levels. Increase as needed with tests that aren't pixel perfect across platforms.
+
+# Which build features are required for this test to run.
+[required_features]
+lzma = false # If LZMA support is enabled in this build
 ```
 
 ## Frame-based tests

tests/tests/util/options.rs

@@ -26,6 +26,7 @@ pub struct TestOptions {
     pub approximations: Option<Approximations>,
     pub player_options: PlayerOptions,
     pub log_fetch: bool,
+    pub required_features: RequiredFeatures,
 }
 
 impl Default for TestOptions {
@@ -42,6 +43,7 @@ impl Default for TestOptions {
             approximations: None,
             player_options: PlayerOptions::default(),
             log_fetch: false,
+            required_features: RequiredFeatures::default(),
         }
     }
 }
@@ -89,6 +91,18 @@ impl Approximations {
     }
 }
 
+#[derive(Deserialize, Default)]
+#[serde(default, deny_unknown_fields)]
+pub struct RequiredFeatures {
+    lzma: bool,
+}
+
+impl RequiredFeatures {
+    pub fn can_run(&self) -> bool {
+        !self.lzma || cfg!(feature = "lzma")
+    }
+}
+
 #[derive(Deserialize, Default)]
 #[serde(default, deny_unknown_fields)]
 pub struct PlayerOptions {

tests/tests/util/test.rs

@@ -71,7 +71,8 @@ impl Test {
         if self.options.ignore {
             return false;
         }
-        self.options.player_options.can_run(check_renderer)
+        self.options.required_features.can_run()
+            && self.options.player_options.can_run(check_renderer)
     }
 
     pub fn compare_output(&self, actual_output: &str) -> Result<()> {