island: corner position helper for the OBS webcam

1 files changed, 7 insertions, 1 deletions

diff --git a/desktop/island/test_logic.js b/desktop/island/test_logic.js
index ee237cc..d504c60 100644
--- a/desktop/island/test_logic.js
+++ b/desktop/island/test_logic.js
@@ -8,7 +8,7 @@ const assert = require("assert");
 const src = fs.readFileSync(__dirname + "/Logic.js", "utf8")
     .replace(/^\.pragma library$/m, "");
 const L = new Function(src +
-    "\nreturn { volumeIcon, vmRole, flagFor, privacyRoles, parseOpenWindow, obsElapsed };")();
+    "\nreturn { volumeIcon, vmRole, flagFor, privacyRoles, parseOpenWindow, obsElapsed, cornerPos };")();
 
 // Volume: muted or zero is muted, then thirds.
 assert.strictEqual(L.volumeIcon(0.5, true), "audio-volume-muted");
@@ -59,4 +59,10 @@ assert.strictEqual(L.obsElapsed(3599999), "59:59");
 assert.strictEqual(L.obsElapsed(3661000), "1:01:01");
 assert.strictEqual(L.obsElapsed(undefined), "00:00");
 
+// Corner positions: 1920x1080 canvas, 298x168 webcam, 16px margin.
+for (const [c, x, y] of [["tl", 16, 16], ["tr", 1606, 16], ["bl", 16, 896], ["br", 1606, 896]])
+    assert.deepStrictEqual(L.cornerPos(c, 1920, 1080, 298, 168, 16), { x, y });
+// An unknown corner reads as top-left, never undefined.
+assert.deepStrictEqual(L.cornerPos("xx", 1920, 1080, 298, 168, 16), { x: 16, y: 16 });
+
 console.log("ok");