quartz/tests: Add tests for IBaseFilter_FindPin() on MPEG layer-3 decoder.

dlls/quartz/tests/mpeglayer3.c

@@ -378,6 +378,47 @@ static void test_enum_pins(void)
     ok(!ref, "Got outstanding refcount %ld.\n", ref);
 }
 
+static void test_find_pin(void)
+{
+    IBaseFilter *filter = create_mpeg_layer3_decoder();
+    IEnumPins *enum_pins;
+    IPin *pin, *pin2;
+    HRESULT hr;
+    ULONG ref;
+
+    hr = IBaseFilter_EnumPins(filter, &enum_pins);
+    ok(hr == S_OK, "Got hr %#lx.\n", hr);
+
+    hr = IBaseFilter_FindPin(filter, L"In", &pin);
+    ok(hr == S_OK, "Got hr %#lx.\n", hr);
+    hr = IEnumPins_Next(enum_pins, 1, &pin2, NULL);
+    ok(hr == S_OK, "Got hr %#lx.\n", hr);
+    ok(pin == pin2, "Pins didn't match.\n");
+    IPin_Release(pin);
+    IPin_Release(pin2);
+
+    hr = IBaseFilter_FindPin(filter, L"Out", &pin);
+    ok(hr == S_OK, "Got hr %#lx.\n", hr);
+    hr = IEnumPins_Next(enum_pins, 1, &pin2, NULL);
+    ok(hr == S_OK, "Got hr %#lx.\n", hr);
+    ok(pin == pin2, "Pins didn't match.\n");
+    IPin_Release(pin);
+    IPin_Release(pin2);
+
+    hr = IBaseFilter_FindPin(filter, L"XForm In", &pin);
+    ok(hr == VFW_E_NOT_FOUND, "Got hr %#lx.\n", hr);
+    hr = IBaseFilter_FindPin(filter, L"XForm Out", &pin);
+    ok(hr == VFW_E_NOT_FOUND, "Got hr %#lx.\n", hr);
+    hr = IBaseFilter_FindPin(filter, L"input pin", &pin);
+    ok(hr == VFW_E_NOT_FOUND, "Got hr %#lx.\n", hr);
+    hr = IBaseFilter_FindPin(filter, L"output pin", &pin);
+    ok(hr == VFW_E_NOT_FOUND, "Got hr %#lx.\n", hr);
+
+    IEnumPins_Release(enum_pins);
+    ref = IBaseFilter_Release(filter);
+    ok(!ref, "Got outstanding refcount %ld.\n", ref);
+}
+
 START_TEST(mpeglayer3)
 {
     IBaseFilter *filter;
@@ -396,6 +437,7 @@ START_TEST(mpeglayer3)
     test_aggregation();
     test_unconnected_filter_state();
     test_enum_pins();
+    test_find_pin();
 
     CoUninitialize();
 }