/usr/lib/python3/dist-packages/pydap/tests/test_model.py is in python3-pydap 3.2.2+ds1-1ubuntu1.
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import copy
import numpy as np
from pydap.model import (DatasetType, BaseType,
SequenceType, StructureType,
GridType, DapType)
import pytest
import warnings
warnings.simplefilter('always')
# Test the super class for Pydap types.
def test_DapType_quote():
"""Test that names are properly quoted."""
var = DapType("foo.bar[0]")
assert (var.name == "foo%2Ebar%5B0%5D")
def test_DapType_attributes():
"""Test attribute assignment.
Note that ``**kwargs`` have precedence.
"""
attributes = {"foo": "bar", "value": 43}
var = DapType("var", attributes=attributes, value=42)
assert (var.attributes == {"foo": "bar", "value": 42})
def test_DapType_id():
"""Test id assignment."""
var = DapType("var")
assert (var._id == "var")
assert (var.id == "var")
def test_DapType_repr():
"""Test the ``__repr__`` method."""
var = DapType("var", foo="bar")
assert (
repr(var) ==
"DapType('var', {'foo': 'bar'})")
def test_DapType_id_property():
"""Test id set/get property."""
var = DapType("var")
var.id = "new"
assert (var.id == "new")
assert (var._id == "new")
def test_DapType_getattr():
"""Test lazy attribute retrieval."""
var = DapType("var", foo="bar", value=42)
assert (var.attributes["foo"] == "bar")
assert (var.foo == "bar")
with pytest.raises(AttributeError):
var.baz
with pytest.raises(KeyError):
var.attributes['baz']
def test_DapType_children():
"""Test children method."""
var = DapType("var")
assert (var.children() == ())
# Test the base Pydap type.
def test_BaseType_no_data():
"""Test empty data and dimensions attributes."""
var = BaseType("var")
assert var.data is None
assert (var.dimensions == ())
def test_BaseType_data_and_dimensions():
"""Test data and dimensions assignment."""
var = BaseType("var", [42], ('x',))
assert (var.data == [42])
assert (var.dimensions == ('x',))
def test_BaseType_repr():
"""Test ``__repr__`` method."""
var = BaseType("var", 42, foo="bar")
assert (repr(var) == "<BaseType with data array(42)>")
def test_BaseType_dtype():
"""Test ``dtype`` property."""
var = BaseType("var", np.array(1, np.int32))
assert (var.dtype == np.int32)
def test_BaseType_shape():
"""Test ``shape`` property."""
var = BaseType("var", np.arange(16).reshape(2, 2, 2, 2))
assert (var.shape == (2, 2, 2, 2))
def test_BaseType_size():
"""Test ``size`` property."""
var = BaseType("var", np.arange(16).reshape(2, 2, 2, 2))
assert (var.size == 16)
def test_BaseType_ndim():
"""Test ``ndim`` property."""
var = BaseType("var", np.arange(16).reshape(2, 2, 2, 2))
assert (var.ndim == 4)
def test_BaseType_copy():
"""Test lightweight ``__copy__`` method."""
original = BaseType("var", np.array(1))
clone = copy.copy(original)
# note that clones share the same data:
assert original is not clone
assert original.data is clone.data
# test attributes
assert (original.id == clone.id)
assert (original.name == clone.name)
assert (original.dimensions == clone.dimensions)
assert (original.attributes == clone.attributes)
def test_BaseType_comparisons():
"""Test that comparisons are applied to data."""
var = BaseType("var", np.array(1))
assert (var == 1)
assert (var != 2)
assert (var >= 0)
assert (var <= 2)
assert (var > 0)
assert (var < 2)
def test_BaseType_sequence_protocol():
"""Test that the object behaves like a sequence."""
var = BaseType("var", np.arange(10))
assert (var[-5] == 5)
assert (len(var) == 10)
assert (list(var) == list(range(10)))
def test_BaseType_iter_protocol():
"""Test that the object behaves like an iterable."""
var = BaseType("var", np.arange(10))
assert (list(iter(var)) == list(range(10)))
def test_BaseType_array():
"""Test array conversion."""
var = BaseType("var", np.arange(16).reshape(2, 2, 2, 2))
np.testing.assert_array_equal(np.array(var),
np.arange(16).reshape(2, 2, 2, 2))
# Test Pydap structures.
def test_StructureType_init():
"""Test attributes used for dict-like behavior."""
var = StructureType("var")
assert (var._visible_keys == [])
assert (var._dict == {})
def test_StructureType_instance():
"""Test that it is a Mapping and DapType."""
var = StructureType("var")
from collections import Mapping
assert isinstance(var, Mapping)
assert isinstance(var, DapType)
def test_StructureType_repr():
"""Test ``__repr__`` method."""
var = StructureType("var")
assert (repr(var) == "<StructureType with children >")
var["one"] = BaseType("one")
var["two"] = BaseType("two")
assert (
repr(var) == "<StructureType with children 'one', 'two'>")
def test_StructureType_len():
"""Test ``__len__`` method."""
var = StructureType("var")
var["one"] = BaseType("one")
var["two"] = BaseType("two")
assert (len(var) == 2)
def test_StructureType_contains():
"""Test container behavior."""
var = StructureType("var")
var["one"] = BaseType("one")
assert "one" in var
def test_StructureType_lazy_attribute():
"""Test lazy attribute, returning first child."""
var = StructureType("var", value=42, one="1")
var["one"] = BaseType("one")
assert (var.value == 42)
assert (var.one is var["one"])
def test_StructureType_children():
"""Test children iteration, should return all children."""
var = StructureType("var", value=42, one="1")
var["one"] = BaseType("one")
var["two"] = BaseType("two")
assert (list(var.children()) == [var["one"], var["two"]])
def test_StructureType_setitem():
"""Test item assignment.
Assignment requires the key and the name of the variable to be
identical. It also takes care of reordering children that are
reinserted.
"""
var = StructureType("var")
var["foo.bar"] = BaseType("foo.bar")
assert (list(var.keys()) == ['foo%2Ebar'])
with pytest.raises(KeyError):
var["bar"] = BaseType("baz")
# test reordering
var["bar"] = BaseType("bar")
var["foo.bar"] = BaseType("foo.bar")
assert (list(var.keys()) == ['bar', 'foo%2Ebar'])
def test_StructureType_getitem():
"""Test item retrieval."""
var = StructureType("var")
child = BaseType("child")
var["child"] = child
assert var["child"] is child
with pytest.raises(KeyError):
var["unloved child"]
with pytest.raises(KeyError):
var[:]
assert var["parent.child"] is child
assert var["grandparent.parent.child"] is child
def test_StructureType_getitem_tuple():
"""Test multiple item retrieval."""
var = StructureType("var")
for name in ['child1', 'child2', 'child3']:
child = BaseType(name)
var[name] = child
assert var[name] is child
assert list(var['child1', 'child3'].keys()) == ['child1', 'child3']
assert (list(var['child1', 'child3']._all_keys()) ==
['child1', 'child2', 'child3'])
with pytest.raises(KeyError):
var['unloved child']
def test_StructureType_delitem():
"""Test item deletion."""
var = StructureType("var")
var["one"] = BaseType("one")
var["two"] = BaseType("two")
var["three"] = BaseType("three")
assert (list(var.keys()) == ['one', 'two', 'three'])
del var["one"]
assert (list(var.keys()) == ['two', 'three'])
# Make sure that one can safely delete
# a non visible child:
subset = var[("two",)]
assert list(subset.keys()) == ['two']
assert isinstance(subset, StructureType)
subset.__delitem__("three")
# Cannot delete an inexistent child:
with pytest.raises(KeyError):
del var["inexistent"]
def test_StructureType_get_data():
"""Test that structure collects data from children."""
var = StructureType("var", value=42, one="1")
var["one"] = BaseType("one", 1)
var["two"] = BaseType("two", 2)
assert (var.data == [1, 2])
def test_StructureType_set_data():
"""Test that data is propagated to children."""
var = StructureType("var", value=42, one="1")
var["one"] = BaseType("one")
var["two"] = BaseType("two")
var.data = [10, 20]
assert (var["one"].data == 10)
assert (var["two"].data == 20)
def test_StructureType_copy():
"""Test lightweight clone of a structure."""
original = StructureType("var", value=42, one="1")
original["one"] = BaseType("one")
original["two"] = BaseType("two")
original.data = [10, 20]
clone = copy.copy(original)
# note that clones share the same data:
assert original is not clone
assert original["one"] is not clone["one"]
assert original["one"].data is clone["one"].data
assert original["two"] is not clone["two"]
assert original["two"].data is clone["two"].data
# test attributes
assert (original.id == clone.id)
assert (original.name == clone.name)
# Test a Pydap structure.
def test_DatasetType_setitem():
"""Test item assignment."""
dataset = DatasetType("dataset")
dataset["one"] = BaseType("one")
assert dataset["one"].id == "one"
def test_DatasetType_id():
"""Test that the dataset id is not propagated."""
dataset = DatasetType("dataset")
child = BaseType("child")
child.id = "error"
dataset["child"] = child
assert (child.id == "child")
@pytest.fixture
def sequence_example():
"""Create a standard sequence from the DAP spec."""
example = SequenceType("example")
example["index"] = BaseType("index")
example["temperature"] = BaseType("temperature")
example["site"] = BaseType("site")
example.data = np.rec.fromrecords([
(10, 15.2, "Diamond_St"),
(11, 13.1, 'Blacktail_Loop'),
(12, 13.3, 'Platinum_St'),
(13, 12.1, 'Kodiak_Trail')], names=list(example.keys()))
return example
def test_SequenceType_data(sequence_example):
"""Test data assignment in sequences."""
np.testing.assert_array_equal(
sequence_example["index"].data, np.array([10, 11, 12, 13]))
def test_SequenceType_len(sequence_example, recwarn):
"""Test that length is read from the data attribute."""
assert len(list(sequence_example.keys())) == 3
assert len(sequence_example) == 4
assert len(recwarn) == 1
assert recwarn.pop(PendingDeprecationWarning)
def test_SequenceType_iterdata(sequence_example):
"""Test that data iteration happens over data."""
for a, b in zip(sequence_example.iterdata(), sequence_example.data):
for sub_a, sub_b in zip(a, b):
assert sub_a == sub_b
def test_SequenceType_iter(sequence_example):
"""Test that iteration happens ove data."""
# Remove in pydap 3.4
for a, b in zip(iter(sequence_example), sequence_example.data):
for sub_a, sub_b in zip(a, b):
assert sub_a == sub_b
def test_SequenceType_iter_deprecation(sequence_example, recwarn):
"""Test that direct iteration over data attribute is deprecated."""
# Remove in pydap 3.4
iter(sequence_example)
assert len(recwarn) == 1
assert recwarn.pop(PendingDeprecationWarning)
def test_SequenceType_items(sequence_example):
"""Test that iteration happens over the child names."""
assert list(sequence_example.items()) == [(key, sequence_example[key])
for key in ['index',
'temperature',
'site']]
def test_SequenceType_values(sequence_example):
"""Test that iteration happens over the child names."""
assert list(sequence_example.values()) == [sequence_example[key]
for key in ['index',
'temperature',
'site']]
def test_SequenceType_getitem(sequence_example):
"""Test item retrieval.
The ``__getitem__`` method is overloaded for sequences, and behavior
will depend on the type of the key. It can either return a child or a
new sequence.
"""
# a string should return the corresponding child
assert isinstance(sequence_example["index"], BaseType)
# a tuple should reorder the children
assert list(sequence_example.keys()) == ["index", "temperature", "site"]
modified = sequence_example["site", "temperature"]
assert isinstance(modified, SequenceType)
assert list(modified.keys()) == ["site", "temperature"]
# the return sequence is a new one
assert sequence_example is not modified
assert sequence_example["site"] is not modified["site"]
assert isinstance(sequence_example["site"], BaseType)
# and the data is not shared
assert sequence_example["site"].data is not modified["site"].data
subset = sequence_example["site"][::2]
assert sequence_example is not subset
assert isinstance(subset, BaseType)
# it is also possible to slice the data, returning a new sequence
subset = sequence_example[sequence_example["index"] > 11]
assert sequence_example is not subset
assert isinstance(subset, SequenceType)
np.testing.assert_array_equal(
subset.data,
sequence_example.data[sequence_example.data["index"] > 11])
def test_SequenceType_copy(sequence_example):
"""Test the lightweight ``__copy__`` method."""
clone = copy.copy(sequence_example)
assert sequence_example is not clone
assert (sequence_example.data == clone.data).all()
# Test Pydap grids.
@pytest.fixture()
def gridtype_example():
"""Create a simple grid."""
example = GridType("example")
example["a"] = BaseType("a", data=np.arange(30*50).reshape(30, 50))
example["x"] = BaseType("x", data=np.arange(30))
example["y"] = BaseType("y", data=np.arange(50))
return example
def test_GridType_repr(gridtype_example):
"""Test ``__repr__`` of grids."""
assert (
repr(gridtype_example) ==
"<GridType with array 'a' and maps 'x', 'y'>")
def test_GridType_dtype(gridtype_example):
"""Test ``dtype`` of grids."""
assert (gridtype_example.dtype == np.dtype('l'))
def test_GridType_shape(gridtype_example):
"""Test ``shape`` of grids."""
assert (gridtype_example.shape == (30, 50))
def test_GridType_size(gridtype_example):
"""Test ``size`` of grids."""
assert (gridtype_example.size == 30 * 50)
def test_GridType_ndim(gridtype_example):
"""Test ``ndim`` of grids."""
assert (gridtype_example.ndim == 2)
def test_GridType_len(gridtype_example):
"""Test ``__len__`` of grids."""
assert (len(gridtype_example) == 3)
def test_GridType_getitem(gridtype_example):
"""Test item retrieval.
As with sequences, this might return a child or a new grid, depending
on the key type.
"""
# a string should return the corresponding child
assert isinstance(gridtype_example["a"], BaseType)
# otherwise it should return a new grid with a subset of the data
subset = gridtype_example[20:22, 40:43]
assert (subset["a"].shape == (2, 3))
assert (subset["x"].shape == (2,))
assert (subset["y"].shape == (3,))
assert gridtype_example is not subset
# pick more than one child:
np.testing.assert_equal(subset["a", "x"]["a"].data,
subset["a"].data)
np.testing.assert_equal(subset["a", "x"]["x"].data,
subset["x"].data)
def test_GridType_getitem_not_tuple(gridtype_example):
"""Test that method works with non-tuple slices."""
subset = gridtype_example[20:22]
assert (subset["a"].shape == (2, 50))
assert (subset["x"].shape == (2,))
assert (subset["y"].shape == (50,))
def test_GridType_array(gridtype_example):
"""Test ``array`` property."""
assert gridtype_example.array is gridtype_example["a"]
def test_GridType_array2(gridtype_example):
"""Test __array__ method."""
np.testing.assert_array_equal(np.array(gridtype_example),
gridtype_example["a"].data)
def test_GridType_maps(gridtype_example):
"""Test ``maps`` property."""
assert (
list(gridtype_example.maps.items()) ==
[("x", gridtype_example["x"]), ("y", gridtype_example["y"])])
def test_GridType_dimensions(gridtype_example):
"""Test ``dimensions`` property."""
assert (gridtype_example.dimensions == ("x", "y"))
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