Squash Odysseus development history

tests/test_editor_direct_manipulation_session_js.py

@@ -0,0 +1,73 @@
+import json
+import subprocess
+import textwrap
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+MODULE = (ROOT / "static/js/editor/direct-manipulation-session.js").as_uri()
+
+
+def run_node(body: str):
+    script = textwrap.dedent(
+        f"""
+        import {{createDirectManipulationSession}} from {json.dumps(MODULE)};
+        {body}
+        """
+    )
+    result = subprocess.run(
+        ["node", "--input-type=module", "-e", script],
+        cwd=ROOT,
+        text=True,
+        capture_output=True,
+        check=True,
+    )
+    return json.loads(result.stdout)
+
+
+def test_session_captures_one_pointer_and_releases_it_on_commit():
+    result = run_node(
+        """
+        const calls=[];
+        const target={
+          setPointerCapture:id=>calls.push(['capture',id]),
+          releasePointerCapture:id=>calls.push(['release',id]),
+        };
+        const session=createDirectManipulationSession({getContext:()=>({documentId:'a'})});
+        session.begin({pointerId:7},{value:1},{captureTarget:target});
+        const wrong=session.update({pointerId:8},()=>calls.push(['wrong']));
+        const right=session.update({pointerId:7},data=>calls.push(['update',data.value]));
+        const committed=session.commit({pointerId:7},data=>calls.push(['commit',data.value]));
+        console.log(JSON.stringify({wrong,right,committed,active:!!session.active,calls}));
+        """
+    )
+    assert result == {
+        "wrong": False,
+        "right": True,
+        "committed": True,
+        "active": False,
+        "calls": [["capture", 7], ["update", 1], ["release", 7], ["commit", 1]],
+    }
+
+
+def test_stale_context_cancels_without_running_update():
+    result = run_node(
+        """
+        let documentId='a';
+        const calls=[];
+        const session=createDirectManipulationSession({
+          getContext:()=>({documentId}),
+          isContextCurrent:context=>context.documentId===documentId,
+          onCancel:(data,reason)=>calls.push(['cancel',data.value,reason]),
+        });
+        session.begin({}, {value:3});
+        documentId='b';
+        const updated=session.update({},()=>calls.push(['update']));
+        console.log(JSON.stringify({updated,active:!!session.active,calls}));
+        """
+    )
+    assert result == {
+        "updated": False,
+        "active": False,
+        "calls": [["cancel", 3, "stale-context"]],
+    }