1 files changed, 17 insertions, 0 deletions
diff --git a/advtrains/spec/textrender_spec.lua b/advtrains/spec/textrender_spec.lua
new file mode 100644
index 0000000..063d9ee
--- /dev/null
+++ b/advtrains/spec/textrender_spec.lua
@@ -0,0 +1,17 @@
+package.path = "../?.lua" .. package.path
+
+local tr = require("textrender")
+
+describe("string to unicode codepoint sequence converter", function()
+	local mbstoucs = tr.mbstoucs
+	it("should convert strings properly", function()
+		assert.same({0x61,0xe9,0x01d8}, mbstoucs("aéǘ"))
+	end)
+	it("should not convert invalid multibyte sequences", function()
+		local function assert_invalid(...)
+			assert.same({}, mbstoucs(string.char(...)))
+		end
+		assert_invalid(65, math.random(128,191), math.random(128,191))
+		assert_invalid(65, math.random(192,223))
+	end)
+end)
+\ No newline at end of file