diff --git a/tests/e2e_specs.json b/tests/e2e_specs.json
index 143cbfe..66aafc4 100644
--- a/tests/e2e_specs.json
+++ b/tests/e2e_specs.json
@@ -292,6 +292,59 @@
       "checks": [
         { "kind": "async_memory_roundtrip", "member": "roundtrip", "write_value": 42 }
       ]
+    },
+    {
+      "id": "calendar_property_setter",
+      "namespace": "Windows.Globalization",
+      "class": "Calendar",
+      "langs": ["py", "ts"],
+      "instantiate": { "kind": "activate" },
+      "checks": [
+        { "kind": "property_set_equals", "member": "year", "set_value": 2024, "expected": 2024 },
+        { "kind": "property_set_equals", "member": "month", "set_value": 6, "expected": 6 },
+        { "kind": "property_set_equals", "member": "day", "set_value": 15, "expected": 15 },
+        { "kind": "property_set_equals", "member": "hour", "set_value": 10, "expected": 10 },
+        { "kind": "property_set_equals", "member": "minute", "set_value": 30, "expected": 30 },
+        { "kind": "property_set_equals", "member": "second", "set_value": 45, "expected": 45 }
+      ]
+    },
+    {
+      "id": "buffer_length_setter",
+      "namespace": "Windows.Storage.Streams",
+      "class": "Buffer",
+      "langs": ["py", "ts"],
+      "instantiate": {
+        "kind": "static_factory",
+        "method": "create",
+        "args": [1024]
+      },
+      "checks": [
+        { "kind": "property_set_equals", "member": "length", "set_value": 512, "expected": 512 }
+      ]
+    },
+    {
+      "id": "calendar_languages_vector",
+      "namespace": "Windows.Globalization",
+      "class": "Calendar",
+      "langs": ["py", "ts"],
+      "instantiate": { "kind": "activate" },
+      "checks": [
+        { "kind": "vector_view_access", "member": "languages", "min_size": 1 }
+      ]
+    },
+    {
+      "id": "memory_buffer_closed_event",
+      "namespace": "Windows.Foundation",
+      "class": "MemoryBuffer",
+      "langs": ["py", "ts"],
+      "instantiate": {
+        "kind": "static_factory",
+        "method": "create",
+        "args": [64]
+      },
+      "checks": [
+        { "kind": "event_callback", "member": "create_reference", "event_name": "Closed", "trigger": "close" }
+      ]
     }
   ]
 }
diff --git a/tests/e2e_specs.schema.json b/tests/e2e_specs.schema.json
index 6f5152f..e474df2 100644
--- a/tests/e2e_specs.schema.json
+++ b/tests/e2e_specs.schema.json
@@ -64,7 +64,10 @@
              "static_string_length",
              "static_expect_error",
              "cross_class_chain",
-             "async_memory_roundtrip"
+             "async_memory_roundtrip",
+             "property_set_equals",
+             "vector_view_access",
+             "event_callback"
            ]
          },
          "member": { "type": "string", "description": "Property or method name (snake_case)" },
@@ -98,7 +101,11 @@
            "type": "array",
            "description": "Steps for cross_class_chain checks"
          },
-         "write_value": { "type": "integer", "description": "Integer value used by async memory roundtrip" }
+         "write_value": { "type": "integer", "description": "Integer value used by async memory roundtrip" },
+         "set_value": { "description": "Value to set for property_set_equals check" },
+         "min_size": { "type": "integer", "description": "Minimum vector size for vector_view_access" },
+         "event_name": { "type": "string", "description": "Event name for event_callback (PascalCase, e.g. Closed)" },
+         "trigger": { "type": "string", "description": "Method to call to trigger the event (snake_case)" }
        }
      }
    }
diff --git a/tests/runners/py_runner.py b/tests/runners/py_runner.py
index 99507ce..282a8ff 100644
--- a/tests/runners/py_runner.py
+++ b/tests/runners/py_runner.py
@@ -210,6 +210,29 @@ def run_check(check: dict, cls, obj, generated_dir: str, pkg_name: str) -> dict:
             else:
                 cr['pass'] = True
 
+        elif kind == 'property_set_equals':
+            set_value = check['set_value']
+            setattr(obj, member, set_value)
+            actual = getattr(obj, member)
+            expected = check['expected']
+            if actual != expected:
+                cr['error'] = f'expected {expected!r}, got {actual!r}'
+            else:
+                cr['pass'] = True
+
+        elif kind == 'vector_view_access':
+            vec = getattr(obj, member)
+            min_size = check.get('min_size', 1)
+            size = vec.size
+            if size < min_size:
+                cr['error'] = f'vector size {size} < {min_size}'
+            else:
+                first = vec.get_at(0)
+                if first is None:
+                    cr['error'] = 'get_at(0) returned None'
+                else:
+                    cr['pass'] = True
+
         elif kind == 'struct_roundtrip':
             struct_mod = importlib.import_module(f"{pkg_name}.{check['struct_module']}")
             struct_cls = getattr(struct_mod, check['struct_class'])
@@ -269,6 +292,29 @@ def run_check(check: dict, cls, obj, generated_dir: str, pkg_name: str) -> dict:
             else:
                 cr['pass'] = True
 
+        elif kind == 'event_callback':
+            source_method = getattr(obj, member)
+            source = source_method()
+            event_name = to_snake_case(check['event_name'])
+            trigger = to_snake_case(check['trigger'])
+
+            fired = [False]
+            on_method = f'on_{event_name}'
+            getattr(source, on_method)(lambda *args: fired.__setitem__(0, True))
+
+            # Try direct method, fall back to IClosable cast
+            if hasattr(source, trigger):
+                getattr(source, trigger)()
+            else:
+                iface_mod = importlib.import_module(f"{pkg_name}.i_closable")
+                IClosable = getattr(iface_mod, 'IClosable')
+                IClosable.from_value(source._obj).close()
+
+            if not fired[0]:
+                cr['error'] = f'event {check["event_name"]} was not fired after {trigger}()'
+            else:
+                cr['pass'] = True
+
         elif kind == 'static_string_length':
             method = getattr(cls, to_snake_case(check['member']))
             args = [literal_arg(a) for a in check.get('args', [])]
diff --git a/tests/runners/ts_runner.ts b/tests/runners/ts_runner.ts
index 9727fb9..e24d083 100644
--- a/tests/runners/ts_runner.ts
+++ b/tests/runners/ts_runner.ts
@@ -137,6 +137,20 @@ async function runSpec(
   return result;
 }
 
+async function importClass(generatedDir: string, className: string): Promise<any> {
+  const candidates = [
+    path.resolve(generatedDir, `${className}.ts`),
+    path.resolve(generatedDir, `${toPascalCase(className)}.ts`),
+  ];
+  for (const p of candidates) {
+    if (fs.existsSync(p)) {
+      const mod = await import(`file://${p.replace(/\\/g, '/')}`);
+      if (mod[className]) return mod[className];
+    }
+  }
+  throw new Error(`Class ${className} not found in: ${candidates.join(', ')}`);
+}
+
 async function runCheck(
   check: Check,
   cls: any,
@@ -167,16 +181,7 @@ async function runCheck(
         args = check.args;
       } else if (check.args_factory) {
         const af = check.args_factory!;
-        const afClassName = af.class;
-        let afCls: any;
-        if (afClassName === clsName) {
-          afCls = cls;
-        } else {
-          const afModPath = path.resolve(generatedDir, `${afClassName}.ts`);
-          const afMod = await import(`file://${afModPath.replace(/\\/g, '/')}`);
-          afCls = afMod[afClassName];
-          if (!afCls) throw new Error(`Class ${afClassName} not found for args_factory`);
-        }
+        const afCls = af.class === clsName ? cls : await importClass(generatedDir, af.class);
         const afMethod = toCamelCase(af.method);
         const afArgs = af.args || [];
         args = [afCls[afMethod](...afArgs)];
@@ -233,8 +238,44 @@ async function runCheck(
         cr.pass = true;
       }
     } else if (kind === 'interface_cast') {
-      // Not yet supported in TS runner
-      cr.pass = true;
+      const ifaceClsName = (check as any).interface_class as string;
+      const methodName = toCamelCase((check as any).method as string);
+
+      const ifaceCls = await importClass(generatedDir, ifaceClsName);
+      const casted = ifaceCls.from(obj._obj);
+      const resultVal = casted[methodName];
+      const actual = String(typeof resultVal === 'function' ? resultVal.call(casted) : resultVal);
+
+      if ((check as any).contains && !actual.includes((check as any).contains)) {
+        cr.error = `"${(check as any).contains}" not in "${actual}"`;
+      } else if (check.expected !== undefined && actual !== String(check.expected)) {
+        cr.error = `expected ${JSON.stringify(check.expected)}, got ${JSON.stringify(actual)}`;
+      } else {
+        cr.pass = true;
+      }
+    } else if (kind === 'property_set_equals') {
+      const setValue = (check as any).set_value;
+      obj[member] = setValue;
+      const actual = obj[member];
+      if (actual !== check.expected) {
+        cr.error = `expected ${JSON.stringify(check.expected)}, got ${JSON.stringify(actual)}`;
+      } else {
+        cr.pass = true;
+      }
+    } else if (kind === 'vector_view_access') {
+      const vec = obj[member];
+      const minSize = (check as any).min_size ?? 1;
+      const size = vec.size;
+      if (size < minSize) {
+        cr.error = `vector size ${size} < ${minSize}`;
+      } else {
+        const first = vec.getAt(0);
+        if (first == null) {
+          cr.error = 'getAt(0) returned null';
+        } else {
+          cr.pass = true;
+        }
+      }
     } else if (kind === 'struct_roundtrip') {
       const structClass = check.struct_class as string;
       const structModule = check.struct_module as string;
@@ -314,6 +355,33 @@ async function runCheck(
       } else {
         cr.pass = true;
       }
+    } else if (kind === 'event_callback') {
+      const sourceMethod = obj[member].bind(obj);
+      const source = sourceMethod();
+      const eventName = (check as any).event_name as string;
+      const triggerMethod = toCamelCase((check as any).trigger as string);
+
+      let fired = false;
+      const onMethod = `on${eventName}`;
+      source[onMethod]((..._args: any[]) => { fired = true; });
+
+      // Try direct method, fall back to IClosable cast for close()
+      if (typeof source[triggerMethod] === 'function') {
+        source[triggerMethod]();
+      } else {
+        const IClosable = await importClass(generatedDir, 'IClosable');
+        const closable = IClosable.from(source._obj);
+        closable[triggerMethod]();
+      }
+
+      // NonBlocking TSFN: callback is queued on event loop, await a tick
+      await new Promise(r => setTimeout(r, 100));
+
+      if (!fired) {
+        cr.error = `event ${eventName} was not fired after ${triggerMethod}()`;
+      } else {
+        cr.pass = true;
+      }
     } else if (kind === 'static_string_length') {
       const method = cls[member]?.bind(cls) ?? cls[Object.getOwnPropertyNames(cls).find(k => k.toLowerCase() === member.toLowerCase())!]?.bind(cls);
       if (!method) { cr.error = `method ${member} not found`; return cr; }
diff --git a/tools/winrt-meta/npm/package-lock.json b/tools/winrt-meta/npm/package-lock.json
index 84dd16b..c7c1980 100644
--- a/tools/winrt-meta/npm/package-lock.json
+++ b/tools/winrt-meta/npm/package-lock.json
@@ -15,7 +15,7 @@
         "@swc/core": "^1.15.21"
       },
       "bin": {
-        "winrt-meta": "bin/winrt-meta.js"
+        "winrt-meta": "cli.js"
       }
     },
     "node_modules/@swc/core": {