# Extracts and executes all the docunits in the `mmodule`
	# Returns a JUnit-compatible `<testsuite>` XML element that contains the results of the executions.
	fun test_markdown(mmodule: MModule): HTMLTag
	do
		var ts = new HTMLTag("testsuite")
		toolcontext.info("nitunit: doc-unit {mmodule}", 2)

		var nmodule = mmodule2node(mmodule)
		if nmodule == null then return ts

		# usualy, only the original module must be imported in the unit test.
		var o = mmodule
		var g = o.mgroup
		if g != null and g.mpackage.name == "core" then
			# except for a unit test in a module of `core`
			# in this case, the whole `core` must be imported
			o = get_mmodule_by_name(nmodule, g, g.mpackage.name).as(not null)
		end

		ts.attr("package", mmodule.full_name)

		var prefix = toolcontext.test_dir
		prefix = prefix.join_path(mmodule.to_s)
		var d2m = new NitUnitExecutor(toolcontext, prefix, o, ts, "Docunits of module {mmodule.full_name}")

		do
			total_entities += 1
			var nmoduledecl = nmodule.n_moduledecl
			if nmoduledecl == null then break label x
			var ndoc = nmoduledecl.n_doc
			if ndoc == null then break label x
			doc_entities += 1
			# NOTE: jenkins expects a '.' in the classname attr
			d2m.extract(ndoc.to_mdoc, "nitunit." + mmodule.full_name + ".<module>", "<module>")
		end label x
		for nclassdef in nmodule.n_classdefs do
			var mclassdef = nclassdef.mclassdef
			if mclassdef == null then continue
			if nclassdef isa AStdClassdef then
				total_entities += 1
				var ndoc = nclassdef.n_doc
				if ndoc != null then
					doc_entities += 1
					d2m.extract(ndoc.to_mdoc, "nitunit." + mclassdef.full_name.replace("$", "."), "<class>")
				end
			end
			for npropdef in nclassdef.n_propdefs do
				var mpropdef = npropdef.mpropdef
				if mpropdef == null then continue
				total_entities += 1
				var ndoc = npropdef.n_doc
				if ndoc != null then
					doc_entities += 1
					var a = mpropdef.full_name.split("$")
					d2m.extract(ndoc.to_mdoc, "nitunit." + a[0] + "." + a[1], a[2])
				end
			end
		end

		d2m.run_tests

		return ts
	end