Handle non-ACGT alleles and het genotypes

requirements.txt

@@ -1,4 +1,4 @@
-cluster_vcf_records >= 0.13.2
+cluster_vcf_records >= 0.13.3
 matplotlib
 pyfastaq >= 3.14.0
 pysam >= 0.12

tests/adjudicator_test.py

@@ -9,6 +9,11 @@
 data_dir = os.path.join(this_dir, "data", "adjudicator")
 
 
+def _load_vcf_record_lines(infile):
+    with open(infile) as f:
+        return [x.rstrip() for x in f if not x.startswith("#")]
+
+
 def test_get_gramtools_kmer_size():
     """test _get_gramtools_kmer_size"""
     build_dir = os.path.join(data_dir, "get_gramtools_kmer_size.build")
@@ -21,7 +26,7 @@ def test_get_gramtools_kmer_size():
 def test_run_clean_is_false():
     """test run when not cleaning up files afterwards"""
     # We're just testing that it doesn't crash.
-    # Check the output files exist, but not their contents.
+    # Check the output files exist, but not their contents (except VCF)
     # First run using splitting of VCF file.
     # Then run without splitting.
     outdir = "tmp.adjudicator.noclean.out"
@@ -47,6 +52,10 @@ def test_run_clean_is_false():
     assert os.path.exists(adj.log_file)
     assert os.path.exists(adj.final_vcf)
     assert os.path.exists(adj.clustered_vcf)
+    expect_vcf = os.path.join(data_dir, "run.expect_final.vcf")
+    expect_lines = _load_vcf_record_lines(expect_vcf)
+    got_lines = _load_vcf_record_lines(adj.final_vcf)
+    assert got_lines == expect_lines
 
     # Clean up and then run without splitting
     shutil.rmtree(outdir)

tests/data/adjudicator/run.calls.1.vcf

@@ -36,7 +36,7 @@ ref.1	299	.	GATA	GA	225	.	INDEL;IDV=30;IMF=0.967742;DP=31;VDB=0.258769;SGB=-0.69
 ref.1	501	.	G	GAGTC	225	.	INDEL;IDV=17;IMF=0.772727;DP=22;VDB=0.516335;SGB=-0.69168;MQSB=1;MQ0F=0;AC=2;AN=2;DP4=0,0,9,10;MQ=60	GT:PL	1/1:255,57,0
 ref.1	701	.	C	A	225	.	DP=18;VDB=0.0438392;SGB=-0.689466;MQSB=1;MQ0F=0;AC=2;AN=2;DP4=0,0,8,8;MQ=60	GT:PL	1/1:255,48,0
 ref.1	702	.	T	G	225	.	DP=16;VDB=0.0438392;SGB=-0.689466;MQSB=1;MQ0F=0;AC=2;AN=2;DP4=0,0,8,8;MQ=60	GT:PL	1/1:255,48,0
-ref.1	703	.	A	T	225	.	DP=16;VDB=0.0438392;SGB=-0.689466;MQSB=1;MQ0F=0;AC=2;AN=2;DP4=0,0,8,8;MQ=60	GT:PL	1/1:255,48,0
-ref.1	704	.	A	T	225	.	DP=16;VDB=0.0438392;SGB=-0.689466;MQSB=1;MQ0F=0;AC=2;AN=2;DP4=0,0,8,8;MQ=60	GT:PL	1/1:255,48,0
+ref.1	703	.	A	T,G	225	.	DP=16;VDB=0.0438392;SGB=-0.689466;MQSB=1;MQ0F=0;AC=2;AN=2;DP4=0,0,8,8;MQ=60	GT:PL	0/1:255,48,0
+ref.1	704	.	A	T,<FOO>	225	.	DP=16;VDB=0.0438392;SGB=-0.689466;MQSB=1;MQ0F=0;AC=2;AN=2;DP4=0,0,8,8;MQ=60	GT:PL	1/1:255,48,0
 ref.1	900	.	T	G	42	.	DP=11;VDB=0.40105;SGB=-0.616816;RPB=0.279932;MQB=0.503877;BQB=1.00775;MQ0F=0.636364;AC=2;AN=2;DP4=4,0,6,0;MQ=12	GT:PL	1/1:85,6,0
-ref.4	61	.	C	A	.	.	DP=42	GT	1/1
+ref.4	61	.	C	A,T	.	.	DP=42	GT	1/2

tests/data/adjudicator/run.expect_final.vcf

@@ -0,0 +1,31 @@
+##fileformat=VCFv4.2
+##source=minos, version 0.12.3
+##fileDate=2022-08-09
+##FORMAT=<ID=ALLELE_DP,Number=R,Type=Float,Description="Mean read depth of ref and each allele">
+##FORMAT=<ID=COV,Number=R,Type=Integer,Description="Number of reads on ref and alt alleles">
+##FORMAT=<ID=COV_TOTAL,Number=1,Type=Integer,Description="Total reads mapped at this site, from gramtools">
+##FORMAT=<ID=DP,Number=1,Type=Float,Description="Mean read depth of called allele (ie the ALLELE_DP of the called allele)">
+##FORMAT=<ID=FRS,Number=1,Type=Float,Description="Fraction of reads that support the genotype call">
+##FORMAT=<ID=GT,Number=1,Type=String,Description="Genotype">
+##FORMAT=<ID=GT_CONF,Number=1,Type=Float,Description="Genotype confidence. Difference in log likelihood of most likely and next most likely genotype">
+##minosMeanReadDepth=16.857
+##minosReadDepthVariance=111.143
+##contig=<ID=ref.1,length=1000>
+##contig=<ID=ref.2,length=1000>
+##contig=<ID=ref.3,length=1000>
+##contig=<ID=ref.4,length=180>
+##FORMAT=<ID=GT_CONF_PERCENTILE,Number=1,Type=Float,Description="Percentile of GT_CONF">
+##FILTER=<ID=MIN_FRS,Description="Minimum FRS of 0.9">
+##FILTER=<ID=MIN_DP,Description="Minimum DP of 0">
+##FILTER=<ID=MIN_GCP,Description="Minimum GT_CONF_PERCENTILE of 5">
+##FILTER=<ID=MAX_DP,Description="Maximum DP of 48.484314144580786 (= 3.0 standard deviations from the mean read depth 16.857)">
+#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO	FORMAT	run.bwa.bam
+ref.1	100	.	G	T	.	PASS	.	GT:DP:ALLELE_DP:FRS:COV_TOTAL:COV:GT_CONF:GT_CONF_PERCENTILE	1/1:6:0,6:1.0:6:0,6:63.3:14.15
+ref.1	299	.	GAT	G	.	PASS	.	GT:DP:ALLELE_DP:FRS:COV_TOTAL:COV:GT_CONF:GT_CONF_PERCENTILE	1/1:30:0,30:1.0:30:0,30:283.3:88.7
+ref.1	501	.	G	GAGTC	.	PASS	.	GT:DP:ALLELE_DP:FRS:COV_TOTAL:COV:GT_CONF:GT_CONF_PERCENTILE	1/1:24.2:0,24.2:1.0:26:0,26:246.84:81.3
+ref.1	701	.	C	A	.	PASS	.	GT:DP:ALLELE_DP:FRS:COV_TOTAL:COV:GT_CONF:GT_CONF_PERCENTILE	1/1:24:0,24:1.0:24:0,24:228.6:77.3
+ref.1	702	.	T	G	.	PASS	.	GT:DP:ALLELE_DP:FRS:COV_TOTAL:COV:GT_CONF:GT_CONF_PERCENTILE	1/1:25:0,25:1.0:25:0,25:237.72:79.25
+ref.1	703	.	A	T	.	PASS	.	GT:DP:ALLELE_DP:FRS:COV_TOTAL:COV:GT_CONF:GT_CONF_PERCENTILE	1/1:25:0,25:1.0:25:0,25:237.72:79.25
+ref.1	704	.	A	T	.	PASS	.	GT:DP:ALLELE_DP:FRS:COV_TOTAL:COV:GT_CONF:GT_CONF_PERCENTILE	1/1:25:0,25:1.0:25:0,25:237.72:79.25
+ref.1	900	.	T	G	.	PASS	.	GT:DP:ALLELE_DP:FRS:COV_TOTAL:COV:GT_CONF:GT_CONF_PERCENTILE	0/0:13:13,0:1.0:13:13,0:127.96:42.7
+ref.4	61	.	C	A,T	.	.	.	GT:DP:ALLELE_DP:FRS:COV_TOTAL:COV:GT_CONF:GT_CONF_PERCENTILE	./.:.:0,0,0:.:0:0,0,0:0.0:0.0

tests/data/adjudicator/run.make_files.sh

@@ -26,10 +26,13 @@ cat $pre.false_call_vcf.vcf >> $pre.calls.1.vcf
 awk -F"\t" '$2!=100' $pre.calls.1.vcf | awk -F"\t" 'BEGIN{OFS="\t"} {if($2==299) {$5="GA,CC"}; $1=$1; print $0}' > $pre.calls.2.vcf
 
 # add a variant to the reference that has no reads
-echo -e "ref.4\t61\t.\tC\tA\t.\t.\tDP=42\tGT\t1/1" >> run.calls.1.vcf
+echo -e "ref.4\t61\t.\tC\tA,T\t.\t.\tDP=42\tGT\t1/2" >> run.calls.1.vcf
 
 # add negative coord to vcf 1
 grep '^#' $pre.calls.1.vcf > $pre.calls.1.vcf.$$
 echo -e "ref.1\t-1\t.\tA\tG\t61\t.\tDP=7;VDB=0.40105;SGB=-0.616816;MQ0F=0.428571;AC=2;AN=2;DP4=0,0,6,0;MQ=20\tGT:PL\t1/1:88,18,0"  >> $pre.calls.1.vcf.$$
 grep -v '^#' $pre.calls.1.vcf >> $pre.calls.1.vcf.$$
-mv $pre.calls.1.vcf.$$ $pre.calls.1.vcf
+
+# change some calls to het instead of hom and add a non-ACGT allele
+awk -F"\t" 'BEGIN{OFS="\t"} $2==703 {$5="T,G"; $10="0/1"substr($10,4)} $2==704 {$5="T,<FOO>"} 1' $pre.calls.1.vcf.$$ > $pre.calls.1.vcf
+rm $pre.calls.1.vcf.$$