feat: simple test workflow

test/main.nf

@@ -0,0 +1,52 @@
+params.str = "Hello, world!"
+
+process split {
+	publishDir "results/lower"
+
+	input:
+	val x
+
+	output:
+	path 'chunk_*'
+
+	script:
+	"""
+	printf '${x}' | split -b 6 - chunk_
+	"""
+}
+
+process to_upper {
+	tag "$y"
+
+	input:
+	path y
+
+	output:
+	path 'upper_*'
+
+	script:
+	"""
+		cat $y | tr '[a-z]' '[A-Z]' > upper_${y}
+	"""
+}
+
+workflow {
+	main:
+	ch_str = channel.of(params.str)
+	ch_chunks = split(ch_str)
+	ch_upper = to_upper(ch_chunks.flatten())
+
+	publish:
+	lower = ch_chunks.flatten()
+	upper = ch_upper
+}
+
+output {
+	lower {
+		path 'lower'
+	}
+
+	upper {
+		path 'upper'
+	}
+}