--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spec/util_human_units_spec.lua	Thu Nov 05 22:31:25 2020 +0100
@@ -0,0 +1,15 @@
+local units = require "util.human.units";
+
+describe("util.human.units", function ()
+	describe("format", function ()
+		it("formats numbers with SI units", function ()
+			assert.equal("1 km", units.format(1000, "m"));
+			assert.equal("1 GJ", units.format(1000000000, "J"));
+			assert.equal("1 ms", units.format(1/1000, "s"));
+			assert.equal("10 ms", units.format(10/1000, "s"));
+			assert.equal("1 ns", units.format(1/1000000000, "s"));
+			assert.equal("1 KiB", units.format(1024, "B", 'b'));
+			assert.equal("1 MiB", units.format(1024*1024, "B", 'b'));
+		end);
+	end);
+end);