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import pytest
from pystac import Collection
from pystac.errors import DeprecatedWarning
from pystac.extensions.item_assets import AssetDefinition, ItemAssetsExtension
from pystac.item_assets import ItemAssetDefinition
from tests.utils import TestCases
CLASSIFICATION_COLLECTION_RASTER_URI = TestCases.get_path(
"data-files/classification/collection-item-assets-raster-bands.json"
)
@pytest.fixture
def landsat8_collection() -> Collection:
return Collection.from_file(
TestCases.get_path("data-files/item-assets/example-landsat8.json")
)
def test_example(landsat8_collection: Collection) -> None:
assert len(landsat8_collection.item_assets) == 13
assert landsat8_collection.item_assets["B1"] == ItemAssetDefinition(
{
"type": "image/tiff; application=geotiff",
"eo:bands": [
{
"name": "B1",
"common_name": "coastal",
"center_wavelength": 0.44,
"full_width_half_max": 0.02,
}
],
"title": "Coastal Band (B1)",
"description": "Coastal Band Top Of the Atmosphere",
}
)
def test_set_using_dict(landsat8_collection: Collection) -> None:
assert len(landsat8_collection.item_assets) == 13
landsat8_collection.item_assets["Bx"] = {
"type": "image/tiff; application=geotiff",
"eo:bands": [
{
"name": "B1",
"common_name": "coastal",
"center_wavelength": 0.44,
"full_width_half_max": 0.02,
}
],
"title": "Coastal Band (B1)",
"description": "Coastal Band Top Of the Atmosphere",
} # type:ignore
assert (
landsat8_collection.item_assets["B1"] == landsat8_collection.item_assets["Bx"]
)
class TestAssetDefinition:
def test_eq(self, landsat8_collection: Collection) -> None:
assert landsat8_collection.item_assets["B1"] != {"title": "Coastal Band (B1)"}
def test_create(self) -> None:
title = "Coastal Band (B1)"
description = "Coastal Band Top Of the Atmosphere"
media_type = "image/tiff; application=geotiff"
roles = ["data"]
asset_defn = ItemAssetDefinition.create(
title=title, description=description, media_type=media_type, roles=roles
)
assert (
asset_defn.title,
asset_defn.description,
asset_defn.media_type,
asset_defn.roles,
) == (title, description, media_type, roles)
def test_title(self) -> None:
asset_defn = ItemAssetDefinition({})
title = "Very Important Asset"
asset_defn.title = title
assert asset_defn.title == asset_defn.to_dict()["title"] == title
def test_description(self) -> None:
asset_defn = ItemAssetDefinition({})
description = "What an incredibly important asset this is!"
asset_defn.description = description
assert (
asset_defn.description == asset_defn.to_dict()["description"] == description
)
def test_media_type(self) -> None:
asset_defn = ItemAssetDefinition({})
media_type = "application/json"
asset_defn.media_type = media_type
assert asset_defn.media_type == asset_defn.to_dict()["type"] == media_type
def test_roles(self) -> None:
asset_defn = ItemAssetDefinition({})
roles = ["thumbnail"]
asset_defn.roles = roles
assert asset_defn.roles == asset_defn.to_dict()["roles"] == roles
def test_set_owner(self, landsat8_collection: Collection) -> None:
asset_definition = ItemAssetDefinition(
{
"type": "image/tiff; application=geotiff",
"eo:bands": [
{
"name": "B1",
"common_name": "coastal",
"center_wavelength": 0.44,
"full_width_half_max": 0.02,
}
],
"title": "Coastal Band (B1)",
"description": "Coastal Band Top Of the Atmosphere",
}
)
asset_definition.set_owner(landsat8_collection)
assert asset_definition.owner == landsat8_collection
def test_extra_fields(collection: Collection) -> None:
asset_definition = ItemAssetDefinition.create(
title=None,
description=None,
media_type=None,
roles=None,
extra_fields={"raster:bands": [{"nodata": 42}]},
)
collection.item_assets = {"data": asset_definition}
assert collection.item_assets["data"].owner == collection
collection_as_dict = collection.to_dict()
assert collection_as_dict["item_assets"]["data"]["raster:bands"] == [{"nodata": 42}]
asset = asset_definition.create_asset("asset.tif")
assert asset.extra_fields["raster:bands"] == [{"nodata": 42}]
collection.item_assets["data"].ext.add("raster")
assert (bands := collection.item_assets["data"].ext.raster.bands)
assert bands[0].nodata == 42
assert collection.item_assets["data"].ext.has("raster")
assert collection.ext.has("raster")
def test_set_item_asset(collection: Collection) -> None:
asset_definition = ItemAssetDefinition.create(
title=None,
description=None,
media_type=None,
roles=None,
extra_fields={"raster:bands": [{"nodata": 42}]},
)
collection.item_assets["data"] = asset_definition
assert collection.item_assets["data"].owner == collection
def test_item_assets_extension_is_deprecated() -> None:
collection = Collection.from_file(CLASSIFICATION_COLLECTION_RASTER_URI)
assert ItemAssetsExtension.get_schema_uri() not in collection.stac_extensions
with pytest.warns(DeprecatedWarning, match="top-level property of"):
item_asset_ext = ItemAssetsExtension.ext(collection, add_if_missing=True)
item_asset = item_asset_ext.item_assets["cloud-mask-raster"]
assert collection.id in repr(item_asset_ext)
assert item_asset.ext.has("eo")
with pytest.warns(DeprecatedWarning, match="top-level property of"):
assert collection.ext.item_assets["cloud-mask-raster"].ext.has("eo")
assert ItemAssetsExtension.get_schema_uri() in collection.stac_extensions
with pytest.warns(DeprecationWarning):
asset_definition = AssetDefinition(
{"title": "Thumbnail image", "type": "image/jpeg"}
)
item_asset_ext.item_assets["thumbnail"] = asset_definition
def test_item_assets_extension_asset_definition_is_deprecated() -> None:
with pytest.warns(
DeprecationWarning, match="Please use ``pystac.ItemAssetDefinition``"
):
asset_definition = AssetDefinition(
{
"type": "image/tiff; application=geotiff",
"eo:bands": [
{
"name": "B1",
"common_name": "coastal",
"center_wavelength": 0.44,
"full_width_half_max": 0.02,
}
],
"title": "Coastal Band (B1)",
"description": "Coastal Band Top Of the Atmosphere",
}
)
assert asset_definition.title == "Coastal Band (B1)"
assert asset_definition.ext.eo.bands
assert asset_definition.ext.eo.bands[0].name == "B1"
assert asset_definition.owner is None
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