def test_exon_object_at_locus_on_negative_strand():
"""
test_exon_object_at_locus : check properties of exon 1 of CXCR3 when looked
up by its location on the negative strand of chrX
"""
exons = ensembl.exons_at_locus("chrX", 71618517, strand="-")
for exon in exons:
assert exon.gene_name == "CXCR3", exon.transcript_name
assert exon.contig == "X", exon.contig
assert exon.strand == "-"
assert exon.on_backward_strand
assert exon.on_negative_strand
assert exon.start <= 71618517, "Unexpected exon start: %s" % exon.start
assert exon.end >= 71618517, "Unexpected exon end: %s" % exon.end
def test_exon_object_at_locus():
"""
test_exon_object_at_locus : check properties of exon 4 of CTNNB1 when looked
up by its location on the forward strand of chr3
"""
exons = ensembl.exons_at_locus(3, 41224526, strand="+")
for exon in exons:
assert exon.gene_name == "CTNNB1", exon.transcript_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 >= 41224526, "Unexpected exon end: %s" % exon.end