qedit/tests: Test that reference counts are shared between interfaces.

dlls/qedit/tests/mediadet.c

@@ -526,9 +526,6 @@ static void test_samplegrabber(void)
     struct unk_impl unk_obj = {{&unk_vtbl}, 19, NULL};
     ISampleGrabber *sg;
     IBaseFilter *bf;
-    IMediaFilter *mf;
-    IPersist *persist;
-    IUnknown *unk;
     IPin *pin;
     IMemInputPin *inpin;
     IEnumPins *pins;
@@ -556,36 +553,12 @@ static void test_samplegrabber(void)
             (void**)&sg);
     ok(hr == E_NOINTERFACE, "SampleGrabber create failed: %08x, expected E_NOINTERFACE\n", hr);
 
-    /* Same refcount for all SampleGrabber interfaces */
     hr = CoCreateInstance(&CLSID_SampleGrabber, NULL, CLSCTX_INPROC_SERVER, &IID_ISampleGrabber,
             (void**)&sg);
     ok(hr == S_OK, "SampleGrabber create failed: %08x, expected S_OK\n", hr);
-    refcount = ISampleGrabber_AddRef(sg);
-    ok(refcount == 2, "refcount == %u, expected 2\n", refcount);
 
     hr = ISampleGrabber_QueryInterface(sg, &IID_IBaseFilter, (void**)&bf);
     ok(hr == S_OK, "QueryInterface for IID_IBaseFilter failed: %08x\n", hr);
-    refcount = IBaseFilter_AddRef(bf);
-    ok(refcount == 4, "refcount == %u, expected 4\n", refcount);
-    refcount = IBaseFilter_Release(bf);
-
-    hr = ISampleGrabber_QueryInterface(sg, &IID_IMediaFilter, (void**)&mf);
-    ok(hr == S_OK, "QueryInterface for IID_IMediaFilter failed: %08x\n", hr);
-    refcount = IMediaFilter_AddRef(mf);
-    ok(refcount == 5, "refcount == %u, expected 5\n", refcount);
-    refcount = IMediaFilter_Release(mf);
-
-    hr = ISampleGrabber_QueryInterface(sg, &IID_IPersist, (void**)&persist);
-    ok(hr == S_OK, "QueryInterface for IID_IPersist failed: %08x\n", hr);
-    refcount = IPersist_AddRef(persist);
-    ok(refcount == 6, "refcount == %u, expected 6\n", refcount);
-    refcount = IPersist_Release(persist);
-
-    hr = ISampleGrabber_QueryInterface(sg, &IID_IUnknown, (void**)&unk);
-    ok(hr == S_OK, "QueryInterface for IID_IUnknown failed: %08x\n", hr);
-    refcount = IUnknown_AddRef(unk);
-    ok(refcount == 7, "refcount == %u, expected 7\n", refcount);
-    refcount = IUnknown_Release(unk);
 
     hr = ISampleGrabber_SetCallback(sg, &my_sg_cb, 0);
     ok(hr == S_OK, "SetCallback failed: %08x\n", hr);

dlls/qedit/tests/samplegrabber.c

@@ -32,19 +32,35 @@ static IBaseFilter *create_sample_grabber(void)
     return filter;
 }
 
+static ULONG get_refcount(void *iface)
+{
+    IUnknown *unknown = iface;
+    IUnknown_AddRef(unknown);
+    return IUnknown_Release(unknown);
+}
+
 #define check_interface(a, b, c) check_interface_(__LINE__, a, b, c)
 static void check_interface_(unsigned int line, void *iface_ptr, REFIID iid, BOOL supported)
 {
     IUnknown *iface = iface_ptr;
     HRESULT hr, expected_hr;
+    ULONG ref, expect_ref;
     IUnknown *unk;
 
     expected_hr = supported ? S_OK : E_NOINTERFACE;
 
+    expect_ref = get_refcount(iface);
+
     hr = IUnknown_QueryInterface(iface, iid, (void **)&unk);
     ok_(__FILE__, line)(hr == expected_hr, "Got hr %#x, expected %#x.\n", hr, expected_hr);
     if (SUCCEEDED(hr))
+    {
+        ref = get_refcount(iface);
+        ok_(__FILE__, line)(ref == expect_ref + 1, "Expected %u references, got %u.\n", expect_ref + 1, ref);
+        ref = get_refcount(unk);
+        ok_(__FILE__, line)(ref == expect_ref + 1, "Expected %u references, got %u.\n", expect_ref + 1, ref);
         IUnknown_Release(unk);
+    }
 }
 
 static void test_interfaces(void)