1 files changed, 22 insertions, 3 deletions
diff --git a/tests/specs/mod.rs b/tests/specs/mod.rs
index 2040eea62..16a9e6f05 100644
--- a/tests/specs/mod.rs
+++ b/tests/specs/mod.rs
@@ -73,6 +73,8 @@ struct StepMetaData {
   pub clean_deno_dir: bool,
   pub args: VecOrString,
   pub cwd: Option<String>,
+  #[serde(rename = "if")]
+  pub if_cond: Option<String>,
   pub command_name: Option<String>,
   #[serde(default)]
   pub envs: HashMap<String, String>,
@@ -152,8 +154,11 @@ fn run_test(test: &CollectedTest, diagnostic_logger: Rc<RefCell<Vec<u8>>>) {
     // todo(dsherret): add bases in the future as needed
     Some(base) => panic!("Unknown test base: {}", base),
     None => {
-      // by default add npm and jsr env vars
-      builder = builder.add_jsr_env_vars().add_npm_env_vars();
+      // by default add all these
+      builder = builder
+        .add_jsr_env_vars()
+        .add_npm_env_vars()
+        .add_compile_env_vars();
     }
   }
 
@@ -167,7 +172,7 @@ fn run_test(test: &CollectedTest, diagnostic_logger: Rc<RefCell<Vec<u8>>>) {
     cwd.copy_to_recursive_with_exclusions(temp_dir, &assertion_paths);
   }
 
-  for step in &metadata.steps {
+  for step in metadata.steps.iter().filter(|s| should_run_step(s)) {
     if step.clean_deno_dir {
       context.deno_dir().path().remove_dir_all();
     }
@@ -198,6 +203,20 @@ fn run_test(test: &CollectedTest, diagnostic_logger: Rc<RefCell<Vec<u8>>>) {
   }
 }
 
+fn should_run_step(step: &StepMetaData) -> bool {
+  if let Some(cond) = &step.if_cond {
+    match cond.as_str() {
+      "windows" => cfg!(windows),
+      "unix" => cfg!(unix),
+      "mac" => cfg!(target_os = "macos"),
+      "linux" => cfg!(target_os = "linux"),
+      value => panic!("Unknown if condition: {}", value),
+    }
+  } else {
+    true
+  }
+}
+
 fn resolve_test_and_assertion_files(
   dir: &PathRef,
   metadata: &MultiTestMetaData,