1 files changed, 33 insertions, 0 deletions
diff --git a/echo.py b/echo.py
new file mode 100644
index 0000000..9ec8437
--- /dev/null
+++ b/echo.py
@@ -0,0 +1,33 @@
+import subprocess
+
+context = {}
+
+def _save(name, value):
+    context[name] = value
+
+def _get(name):
+    return context[name]
+
+def assertEqual(a, b):
+    if a != b:
+        raise Exception(
+            'expected {!r} == {!r}, but was disappointed'.format(a, b))
+
+def run_echo_without_args():
+    cmd = '/bin/echo'
+    p = subprocess.Popen(
+        [cmd], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+    out, err = p.communicate()
+    context["stdout"] = out
+    context["stderr"] = err
+    context["exit_code"] = p.returncode
+
+def exit_code_is_zero(exit_code=None):
+    exit_code = int(exit_code)
+    assertEqual(_get("exit_code"), exit_code)
+
+def stdout_is_a_newline():
+    assertEqual(_get('stdout'), '\n')
+
+def stderr_is_empty():
+    assertEqual(_get('stderr'), '')