floats iter 4.6: codegen io/print_float + examples/floats.ail.json E2E fixture

2026-05-10 16:25:25 +02:00
parent bde5aafb03
commit 9764b616ce
3 changed files with 194 additions and 0 deletions
@@ -0,0 +1,69 @@
+//! Floats milestone iter 4.6 — end-to-end fixture.
+//!
+//! `examples/floats.ail.json` is built via the public `ail build`
+//! CLI and run; stdout is matched against the expected three
+//! lines (`4`, `42`, `-1.5`). This test exercises the full
+//! pipeline — Float literal lowering, polymorphic `+` Float arm,
+//! `int_to_float` (sitofp), `neg` Float (fneg), `io/print_float`
+//! (printf `%g\n`).
+
+use std::path::PathBuf;
+use std::process::Command;
+
+fn workspace_root() -> PathBuf {
+    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .parent().unwrap()
+        .parent().unwrap()
+        .to_path_buf()
+}
+
+#[test]
+fn floats_example_prints_expected_stdout() {
+    let root = workspace_root();
+    let example = root.join("examples").join("floats.ail.json");
+    assert!(example.exists(), "expected fixture at {:?}", example);
+
+    // Build via `cargo run -p ail -- build` to use the in-tree CLI.
+    let target_bin = std::env::temp_dir().join(format!(
+        "ailang-floats-e2e-{}",
+        std::process::id()
+    ));
+
+    let build = Command::new("cargo")
+        .current_dir(&root)
+        .args([
+            "run", "--quiet", "-p", "ail", "--",
+            "build",
+            example.to_str().unwrap(),
+            "-o", target_bin.to_str().unwrap(),
+        ])
+        .output()
+        .expect("cargo run -p ail -- build");
+    assert!(
+        build.status.success(),
+        "ail build failed:\nstdout: {}\nstderr: {}",
+        String::from_utf8_lossy(&build.stdout),
+        String::from_utf8_lossy(&build.stderr),
+    );
+
+    let run = Command::new(&target_bin)
+        .output()
+        .expect("run floats binary");
+    assert!(
+        run.status.success(),
+        "floats binary exited non-zero: status {:?}\nstdout: {}\nstderr: {}",
+        run.status,
+        String::from_utf8_lossy(&run.stdout),
+        String::from_utf8_lossy(&run.stderr),
+    );
+
+    let stdout = String::from_utf8_lossy(&run.stdout);
+    let expected = "4\n42\n-1.5\n";
+    assert_eq!(
+        stdout, expected,
+        "stdout mismatch.\nGot:\n{}\nExpected:\n{}",
+        stdout, expected,
+    );
+
+    let _ = std::fs::remove_file(&target_bin);
+}