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import os
import pytest
import numpy as np
from astropy.io import fits
from pynpoint.core.pypeline import Pypeline
from pynpoint.readwrite.fitsreading import FitsReadingModule
from pynpoint.util.tests import create_config, create_star_data, remove_test_data
class TestFitsReading:
def setup_class(self) -> None:
self.limit = 1e-10
self.test_dir = os.path.dirname(__file__) + "/"
create_star_data(self.test_dir + "fits")
create_config(self.test_dir + "PynPoint_config.ini")
self.pipeline = Pypeline(self.test_dir, self.test_dir, self.test_dir)
def teardown_class(self) -> None:
remove_test_data(self.test_dir, folders=["fits"], files=["filenames.dat"])
def test_fits_reading(self) -> None:
module = FitsReadingModule(
name_in="read1",
input_dir=self.test_dir + "fits",
image_tag="input",
overwrite=False,
check=True,
)
self.pipeline.add_module(module)
self.pipeline.run_module("read1")
data = self.pipeline.get_data("input")
assert np.sum(data) == pytest.approx(
105.54278879805277, rel=self.limit, abs=0.0
)
assert data.shape == (10, 11, 11)
def test_fits_reading_overwrite(self) -> None:
module = FitsReadingModule(
name_in="read2",
input_dir=self.test_dir + "fits",
image_tag="input",
overwrite=True,
check=True,
)
self.pipeline.add_module(module)
self.pipeline.run_module("read2")
data = self.pipeline.get_data("input")
assert np.sum(data) == pytest.approx(
105.54278879805277, rel=self.limit, abs=0.0
)
assert data.shape == (10, 11, 11)
def test_static_not_found(self) -> None:
self.pipeline.set_attribute("config", "DIT", "Test", static=True)
module = FitsReadingModule(
name_in="read3",
input_dir=self.test_dir + "fits",
image_tag="input",
overwrite=True,
check=True,
)
self.pipeline.add_module(module)
with pytest.warns(UserWarning) as warning:
self.pipeline.run_module("read3")
assert len(warning) == 2
for item in warning:
assert (
item.message.args[0]
== "Static attribute DIT (=Test) not found in the FITS "
"header."
)
self.pipeline.set_attribute("config", "DIT", "ESO DET DIT", static=True)
def test_static_changing(self) -> None:
with fits.open(self.test_dir + "fits/images_0.fits") as hdu:
header = hdu[0].header
header["HIERARCH ESO DET DIT"] = 0.1
hdu.writeto(self.test_dir + "fits/images_0.fits", overwrite=True)
with fits.open(self.test_dir + "fits/images_1.fits") as hdu:
header = hdu[0].header
header["HIERARCH ESO DET DIT"] = 0.2
hdu.writeto(self.test_dir + "fits/images_1.fits", overwrite=True)
module = FitsReadingModule(
name_in="read4",
input_dir=self.test_dir + "fits",
image_tag="input",
overwrite=True,
check=True,
)
self.pipeline.add_module(module)
with pytest.warns(UserWarning) as warning:
self.pipeline.run_module("read4")
assert len(warning) == 1
assert (
warning[0].message.args[0] == f"Static attribute ESO DET DIT has changed. "
f"Possibly the current file {self.test_dir}fits/"
f"images_1.fits does not belong to the data set "
f"'input'. Attribute value is updated."
)
def test_header_attribute(self) -> None:
with fits.open(self.test_dir + "fits/images_0.fits") as hdu:
header = hdu[0].header
header["PARANG"] = 1.0
hdu.writeto(self.test_dir + "fits/images_0.fits", overwrite=True)
with fits.open(self.test_dir + "fits/images_1.fits") as hdu:
header = hdu[0].header
header["PARANG"] = 2.0
header["HIERARCH ESO DET DIT"] = 0.1
hdu.writeto(self.test_dir + "fits/images_1.fits", overwrite=True)
module = FitsReadingModule(
name_in="read5",
input_dir=self.test_dir + "fits",
image_tag="input",
overwrite=True,
check=True,
)
self.pipeline.add_module(module)
self.pipeline.run_module("read5")
def test_non_static_not_found(self) -> None:
self.pipeline.set_attribute("config", "DIT", "None", static=True)
for i in range(2):
with fits.open(f"{self.test_dir}/fits/images_{i}.fits") as hdu:
header = hdu[0].header
del header["HIERARCH ESO DET DIT"]
del header["HIERARCH ESO DET EXP NO"]
hdu.writeto(f"{self.test_dir}/fits/images_{i}.fits", overwrite=True)
module = FitsReadingModule(
name_in="read6",
input_dir=self.test_dir + "fits",
image_tag="input",
overwrite=True,
check=True,
)
self.pipeline.add_module(module)
with pytest.warns(UserWarning) as warning:
self.pipeline.run_module("read6")
assert len(warning) == 2
for item in warning:
assert (
item.message.args[0]
== "Non-static attribute EXP_NO (=ESO DET EXP NO) not "
"found in the FITS header."
)
def test_fits_read_files(self) -> None:
module = FitsReadingModule(
name_in="read7",
input_dir=None,
image_tag="files",
overwrite=False,
check=True,
filenames=[
self.test_dir + "fits/images_0.fits",
self.test_dir + "fits/images_1.fits",
],
)
self.pipeline.add_module(module)
with pytest.warns(UserWarning) as warning:
self.pipeline.run_module("read7")
assert len(warning) == 2
for item in warning:
assert (
item.message.args[0]
== "Non-static attribute EXP_NO (=ESO DET EXP NO) not "
"found in the FITS header."
)
data = self.pipeline.get_data("files")
assert np.sum(data) == pytest.approx(
105.54278879805277, rel=self.limit, abs=0.0
)
assert data.shape == (10, 11, 11)
def test_fits_read_textfile(self) -> None:
with open(self.test_dir + "filenames.dat", "w") as file_obj:
file_obj.write(self.test_dir + "fits/images_0.fits\n")
file_obj.write(self.test_dir + "fits/images_1.fits\n")
module = FitsReadingModule(
name_in="read8",
input_dir=None,
image_tag="files",
overwrite=True,
check=True,
filenames=self.test_dir + "filenames.dat",
)
self.pipeline.add_module(module)
with pytest.warns(UserWarning) as warning:
self.pipeline.run_module("read8")
assert len(warning) == 2
for item in warning:
assert (
item.message.args[0]
== "Non-static attribute EXP_NO (=ESO DET EXP NO) not "
"found in the FITS header."
)
data = self.pipeline.get_data("files")
assert np.sum(data) == pytest.approx(
105.54278879805277, rel=self.limit, abs=0.0
)
assert data.shape == (10, 11, 11)
def test_fits_read_files_exists(self) -> None:
module = FitsReadingModule(
name_in="read9",
input_dir=None,
image_tag="files",
overwrite=True,
check=True,
filenames=[
f"{self.test_dir}fits/images_0.fits",
f"{self.test_dir}fits/images_2.fits",
],
)
self.pipeline.add_module(module)
with pytest.raises(ValueError) as error:
self.pipeline.run_module("read9")
assert (
str(error.value)
== f"The file {self.test_dir}fits/images_2.fits does not exist. "
f"Please check that the path is correct."
)
def test_fits_read_textfile_exists(self) -> None:
with open(self.test_dir + "filenames.dat", "w") as file_obj:
file_obj.write(self.test_dir + "fits/images_0.fits\n")
file_obj.write(self.test_dir + "fits/images_2.fits\n")
module = FitsReadingModule(
name_in="read10",
input_dir=None,
image_tag="files",
overwrite=True,
check=True,
filenames=self.test_dir + "filenames.dat",
)
self.pipeline.add_module(module)
with pytest.raises(ValueError) as error:
self.pipeline.run_module("read10")
assert (
str(error.value)
== f"The file {self.test_dir}fits/images_2.fits does not exist. "
f"Please check that the path is correct."
)
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