hy/tests/native_tests/py3_only_tests.hy
Gergely Nagy 9f88e07e1d Drop a set of brackets from let.
This changes let to use a flat list of symbol-value pairs instead of a
vector of vectors. One side effect is that (let [[a 1] z]) is not
expressible now, and one will explicitly need to set a nil value for z,
such as: (let [a 1 z nil]).

Closes #713.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
2015-10-01 10:08:04 +02:00

39 lines
1.5 KiB
Hy

;; Tests where the emitted code relies on Python 3.
;; Conditionally included in nosetests runs.
(import [hy._compat [PY33]])
(import [hy.errors [HyCompileError]])
(defn test-exception-cause []
(try (raise ValueError :from NameError)
(except [e [ValueError]]
(assert (= (type (. e __cause__)) NameError)))))
(defn test-kwonly []
"NATIVE: test keyword-only arguments"
;; keyword-only with default works
(let [kwonly-foo-default-false (fn [&kwonly [foo false]] foo)]
(assert (= (apply kwonly-foo-default-false) false))
(assert (= (apply kwonly-foo-default-false [] {"foo" true}) true)))
;; keyword-only without default ...
(let [kwonly-foo-no-default (fn [&kwonly foo] foo)
attempt-to-omit-default (try
(kwonly-foo-no-default)
(except [e [Exception]] e))]
;; works
(assert (= (apply kwonly-foo-no-default [] {"foo" "quux"}) "quux"))
;; raises TypeError with appropriate message if not supplied
(assert (isinstance attempt-to-omit-default TypeError))
(assert (in "missing 1 required keyword-only argument: 'foo'"
(. attempt-to-omit-default args [0]))))
;; keyword-only with other arg types works
(let [function-of-various-args
(fn [a b &rest args &kwonly foo &kwargs kwargs]
(, a b args foo kwargs))]
(assert (= (apply function-of-various-args
[1 2 3 4] {"foo" 5 "bar" 6 "quux" 7})
(, 1 2 (, 3 4) 5 {"bar" 6 "quux" 7})))))