Moon surface map

crates/resolved-cli/tests/cli.rs

@@ -30,8 +30,8 @@ fn render(scene: &str, adapter: &str) -> image::ImageBuffer<image::Rgb<u16>, Vec
     render_at(scene, adapter, "L0")
 }
 
-/// A data directory whose Earth images are small and uniformly gray, for tests at
-/// lighting L1 that do not need Blue Marble: loading the real 16384 x 8192 images takes
+/// A data directory whose Earth images and Moon map are small and uniform, for tests at
+/// lighting L1 that do not need the real ones: loading those (16384 x 8192 each) takes
 /// seconds in a debug build, and they are only there once fetched.
 fn gray_earth() -> PathBuf {
     static DIR: std::sync::OnceLock<PathBuf> = std::sync::OnceLock::new();
@@ -44,6 +44,11 @@ fn gray_earth() -> PathBuf {
                 .save(dir.join(format!("earth/bmng-2004-{month:02}.jpg")))
                 .unwrap();
         }
+        // A uniform Moon: I/F 0.06 (16-bit values of I/F x 100,000).
+        std::fs::create_dir_all(dir.join("moon")).unwrap();
+        image::ImageBuffer::<image::Luma<u16>, _>::from_pixel(64, 32, image::Luma([6000]))
+            .save(dir.join("moon/wac-hapke-643.png"))
+            .unwrap();
         dir
     })
     .clone()
@@ -164,6 +169,35 @@ fn solar_eclipse_puts_the_umbra_at_greatest_eclipse() {
     assert!(corner.iter().all(|&v| v > 70), "{corner:?}");
 }
 
+#[test]
+fn lighting_l1_names_a_missing_moon_map() {
+    // Earth's images but no Moon map: the error names the file and the script.
+    let dir = out_dir().join("earth-only");
+    std::fs::create_dir_all(dir.join("earth")).unwrap();
+    std::fs::copy(
+        gray_earth().join("earth/bmng-2004-07.jpg"),
+        dir.join("earth/bmng-2004-07.jpg"),
+    )
+    .unwrap();
+    let result = resolved(&[
+        "render",
+        "--scene",
+        "examples/scenes/landsat8.toml",
+        "--lighting",
+        "L1",
+        "--data",
+        dir.to_str().unwrap(),
+        "--preview",
+        "x.png",
+    ]);
+    assert!(!result.status.success());
+    let stderr = String::from_utf8_lossy(&result.stderr);
+    assert!(
+        stderr.contains("moon/wac-hapke-643.png") && stderr.contains("fetch-moon.py"),
+        "{stderr}"
+    );
+}
+
 #[test]
 fn errors_are_reported() {
     let missing = resolved(&["render", "--scene", "no/such.toml", "--preview", "x.png"]);