Add Fastdotcom config flow (#98686)

* Adding config flow and tests

* Removing update and adding to integrations.json

* Updating hassfest

* Removing comments

* Removing unique ID

* Putting the setup_platform out of order

* Adding feedback on issues and importing

* Removing uniqueID (again)

* Adjusting unload and typo

* Updating manifest properly

* Minor patching

* Removing hass.data.setdefault(DOMAIN, {})

* Moving load_platform to __init__.py

* Update homeassistant/components/fastdotcom/config_flow.py

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

* Update homeassistant/components/fastdotcom/strings.json

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

* Update homeassistant/components/fastdotcom/__init__.py

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

* Update homeassistant/components/fastdotcom/config_flow.py

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

* Adding an unload function for the timer

* Adding issue on setup platform in sensor

* Update homeassistant/components/fastdotcom/config_flow.py

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

* Removing platform

* Fixing strings.json

* Fine-tuning

* Putting back last_state

---------

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

tests/components/fastdotcom/test_config_flow.py

@@ -0,0 +1,74 @@
+"""Test for the Fast.com config flow."""
+from unittest.mock import patch
+
+import pytest
+
+from homeassistant import config_entries
+from homeassistant.components.fastdotcom.const import DOMAIN
+from homeassistant.config_entries import SOURCE_IMPORT, SOURCE_USER
+from homeassistant.core import HomeAssistant
+from homeassistant.data_entry_flow import FlowResultType
+
+from tests.common import MockConfigEntry
+
+
+async def test_user_form(hass: HomeAssistant) -> None:
+    """Test the full user configuration flow."""
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}
+    )
+
+    assert result["type"] == FlowResultType.FORM
+    assert result["step_id"] == "user"
+
+    with patch(
+        "homeassistant.components.fastdotcom.async_setup_entry",
+        return_value=True,
+    ) as mock_setup_entry:
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            user_input={},
+        )
+
+    assert result["type"] == FlowResultType.CREATE_ENTRY
+    assert result["title"] == "Fast.com"
+    assert result["data"] == {}
+    assert result["options"] == {}
+    assert len(mock_setup_entry.mock_calls) == 1
+
+
+@pytest.mark.parametrize("source", [SOURCE_USER, SOURCE_IMPORT])
+async def test_single_instance_allowed(
+    hass: HomeAssistant,
+    source: str,
+) -> None:
+    """Test we abort if already setup."""
+    mock_config_entry = MockConfigEntry(domain=DOMAIN)
+
+    mock_config_entry.add_to_hass(hass)
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": source}
+    )
+
+    assert result["type"] == FlowResultType.ABORT
+    assert result["reason"] == "single_instance_allowed"
+
+
+async def test_import_flow_success(hass: HomeAssistant) -> None:
+    """Test import flow."""
+    with patch(
+        "homeassistant.components.fastdotcom.__init__.SpeedtestData",
+        return_value={"download": "50"},
+    ), patch("homeassistant.components.fastdotcom.sensor.SpeedtestSensor"):
+        result = await hass.config_entries.flow.async_init(
+            DOMAIN,
+            context={"source": config_entries.SOURCE_IMPORT},
+            data={},
+        )
+        await hass.async_block_till_done()
+
+        assert result["type"] == FlowResultType.CREATE_ENTRY
+        assert result["title"] == "Fast.com"
+        assert result["data"] == {}
+        assert result["options"] == {}