def test_exon_object_by_id():
"""
test_exon_object_by_id : check properties of exon 4 of CTNNB1 when looked
up by ID in Ensembl 77.
"""
exon = ensembl.exon_by_id("ENSE00003464041")
assert exon.gene_name == "CTNNB1", \
"Unexpected gene name: %s" % exon.gene_name
assert exon.contig == "3", exon.contig
assert exon.strand == "+"
assert exon.on_forward_strand
assert exon.on_positive_strand
assert exon.start == 41224526, "Unexpected exon start: %s" % exon.start
assert exon.end == 41224753, "Unexpected exon end: %s" % exon.end
assert exon.length == len(exon) == 228
def test_exon_object_by_id_on_negative_strand():
"""
test_exon_object_by_id : check properties of exon 1 from CXCR3 when looked
up by ID in Ensembl 77.
"""
exon = ensembl.exon_by_id("ENSE00001817013")
assert exon.gene_name == "CXCR3", \
"Unexpected gene name: %s" % exon.gene_name
assert exon.contig == "X", exon.contig
assert exon.strand == "-"
assert exon.on_backward_strand
assert exon.on_negative_strand
assert exon.start == 71618438, "Unexpected exon start: %s" % exon.start
assert exon.end == 71618517, "Unexpected exon end: %s" % exon.end
assert exon.length == len(exon) == 80