added test

Author: behrica

test/libpython_clj2/uv_test.clj

@@ -0,0 +1,34 @@
+(ns libpython-clj2.uv-test
+  (:require [clojure.test :refer :all]
+            [clojure.string :as str]
+            [libpython-clj2.python.uv :as uv]))
+
+
+(deftest start-and-print-captures-stdout
+  (let [out (with-out-str
+              (@#'libpython-clj2.python.uv/start-and-print!
+               ["sh" "-lc" "printf 'hello\n' "]))]
+    (is (= "hello\n" out))))
+
+(deftest start-and-print-captures-stderr
+  (let [out (with-out-str
+              (@#'libpython-clj2.python.uv/start-and-print!
+               ["sh" "-lc" "printf 'oops\n' 1>&2 "]))]
+    (is (= "oops\n" out))))
+
+(deftest start-and-print-reads-stdout-then-stderr
+  ;; The child process writes interleaved to stdout and stderr, but
+  ;; start-and-print! reads stdout to completion before stderr, so the
+  ;; captured output should have all stdout first, then all stderr.
+  (let [script (str/join "; " ["echo out1"
+                                 "echo err1 1>&2"
+                                 "echo out2"
+                                 "echo err2 1>&2"]) 
+        out (with-out-str
+              (@#'libpython-clj2.python.uv/start-and-print!
+               ["sh" "-lc" script]))]
+    (is (= (str "out1\n"
+                "out2\n"
+                "err1\n"
+                "err2\n")
+           out))))