updated tests and added README, based on review feedback.

janet/README.md

@@ -0,0 +1,39 @@
+# Gilded Rose
+
+This is the Gilded Rose kata in [janet](https://janet-lang.org).
+
+## Getting started
+
+We'll need to install [janet and jpm](https://janet-lang.org/docs/index.html).
+
+## Running texttest
+
+To produce output suitable for texttest, we can run:
+
+```sh
+janet test/texttest.janet
+```
+
+We can specify the number of days as an argument:
+
+```sh
+janet test/texttest.janet 30
+```
+
+## Running tests
+
+First, we install the test library dependency using `jpm -l deps`. Then we can run all the tests using:
+
+```sh
+jpm -l test
+```
+
+The testing library being used is [judge](https://github.com/ianthehenry/judge), that enables the writing of inline snapshot tests. 
+Specifically, Judge has the ability to capture a snapshot of stdout, which gives us a similar experience to that offered by texttest, but natively in the janet tests.
+
+Having run `jpm -l deps`, we now have a (repository-local) installed executable of judge, which we can run directly using:
+
+```sh
+./jpm_tree/bin/judge
+```
+(pass `-h` for usage).