test for github issue snakemake#3556

b-brankovics · b-brankovics · commit e715f3ec58ef · 2025-07-10T17:45:03.000+02:00
diff --git a/tests/test_github_issue3556/Snakefile b/tests/test_github_issue3556/Snakefile
@@ -0,0 +1,39 @@
+shell.executable("bash")
+
+rule all:
+    input:
+        "d.out",
+
+rule A:
+    output:
+        "a.out",
+    shell:
+        "echo 'text' > {output}"
+
+rule B:
+    input:
+        "a.out",
+    output:
+        "b_{i}.out",
+    shell:
+        "cat {input} > {output}"
+
+# rule C is required for #946
+#  use `range(20)` so test will pass in < 5% of cases where issue is present
+rule C:
+    input:
+        expand("b_{i}.out", i=list(range(4))),
+    output:
+        "c.out",
+    shell:
+        "cat {input} > {output}"
+
+# For #946, 'a.out' is required as input, but does not need to be `ancient()`
+rule D:
+    input:
+        "a.out",
+        "c.out",
+    output:
+        "d.out",
+    shell:
+        "cat {input} > {output}"
diff --git a/tests/test_github_issue3556/expected-results/dag.mmd b/tests/test_github_issue3556/expected-results/dag.mmd
@@ -0,0 +1,31 @@
+---
+title: DAG
+---
+flowchart TB
+	id0[all]
+	id1[D]
+	id2[A]
+	id3[C]
+	id4[B - i: 0]
+	id5[B - i: 1]
+	id6[B - i: 2]
+	id7[B - i: 3]
+	style id0 fill:#57BFD9,stroke-width:2px,color:#333333
+	style id1 fill:#57D98B,stroke-width:2px,color:#333333
+	style id2 fill:#D95757,stroke-width:2px,color:#333333
+	style id3 fill:#8BD957,stroke-width:2px,color:#333333
+	style id4 fill:#D9BF57,stroke-width:2px,color:#333333
+	style id5 fill:#D9BF57,stroke-width:2px,color:#333333
+	style id6 fill:#D9BF57,stroke-width:2px,color:#333333
+	style id7 fill:#D9BF57,stroke-width:2px,color:#333333
+	id1 --> id0
+	id2 --> id1
+	id3 --> id1
+	id4 --> id3
+	id5 --> id3
+	id6 --> id3
+	id7 --> id3
+	id2 --> id4
+	id2 --> id5
+	id2 --> id6
+	id2 --> id7
diff --git a/tests/tests.py b/tests/tests.py
@@ -2439,3 +2439,7 @@ def test_censored_path():
 
 def test_params_empty_inherit():
     run(dpath("test_params_empty_inherit"))
+
+
+def test_github_issue3556():
+    run(dpath("test_github_issue3556"), shellcmd="snakemake --dag mermaid-js >dag.mmd")
