import pytest
from qolab.data.trace import loadTrace
import numpy as np

def isItExpectedTrace(tr):
    cfg = tr.getConfig()
    assert cfg['config']['version'] == '0.1'
    assert cfg['config']['model'] == 'Trace'
    data = tr.getData()
    assert np.all( (data - np.array([[1], [3], [2], [5]])) == 0 )
    return True

def test_load_uncompressed_v0dot1_trace():
    tr = loadTrace('tests/trace_test_data/xtrace1.dat')
    assert isItExpectedTrace(tr) == True

def test_load_gzip_compressed_v0dot1_trace():
    tr = loadTrace('tests/trace_test_data/xtrace1.dat.gz')
    assert isItExpectedTrace(tr) == True

def test_tryCompressedIfMissing():
    fname = 'tests/trace_test_data/only_compressed_file1.dat'
    # first we check that the guess is working
    tr = loadTrace(fname, tryCompressedIfMissing=True)
    assert isItExpectedTrace(tr) == True

    # now we disable search for compressed version
    with pytest.raises(FileNotFoundError) as exc_info:
        tr = loadTrace(fname, tryCompressedIfMissing=False)