Implement Reolink reconfiguration flow (#126004)

Co-authored-by: Robert Resch <robert@resch.dev>

tests/components/reolink/test_config_flow.py

@@ -503,3 +503,53 @@ async def test_dhcp_ip_update(
 
     await hass.async_block_till_done()
     assert config_entry.data[CONF_HOST] == expected
+
+
+async def test_reconfig(hass: HomeAssistant, mock_setup_entry: MagicMock) -> None:
+    """Test a reconfiguration flow."""
+    config_entry = MockConfigEntry(
+        domain=DOMAIN,
+        unique_id=format_mac(TEST_MAC),
+        data={
+            CONF_HOST: TEST_HOST,
+            CONF_USERNAME: TEST_USERNAME,
+            CONF_PASSWORD: TEST_PASSWORD,
+            CONF_PORT: TEST_PORT,
+            CONF_USE_HTTPS: TEST_USE_HTTPS,
+        },
+        options={
+            CONF_PROTOCOL: DEFAULT_PROTOCOL,
+        },
+        title=TEST_NVR_NAME,
+    )
+    config_entry.add_to_hass(hass)
+
+    assert await hass.config_entries.async_setup(config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN,
+        context={
+            "source": config_entries.SOURCE_RECONFIGURE,
+            "entry_id": config_entry.entry_id,
+        },
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "user"
+    assert result["errors"] == {}
+
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {
+            CONF_HOST: TEST_HOST2,
+            CONF_USERNAME: TEST_USERNAME,
+            CONF_PASSWORD: TEST_PASSWORD,
+        },
+    )
+
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "reconfigure_successful"
+    assert config_entry.data[CONF_HOST] == TEST_HOST2
+    assert config_entry.data[CONF_USERNAME] == TEST_USERNAME
+    assert config_entry.data[CONF_PASSWORD] == TEST_PASSWORD