From f018f576993c86a73f0a730ffa56e67e328c7aaf Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Sat, 1 Jun 2019 22:00:29 +0300
Subject: Add: a second scenario

---
 echo.md   | 12 ++++++++++++
 echo.py   | 14 ++++++++++++--
 echo.yaml |  8 +++++++-
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/echo.md b/echo.md
index f9bd88d..fef520e 100644
--- a/echo.md
+++ b/echo.md
@@ -23,3 +23,15 @@ then exit code is 0
 and standard output contains a newline
 and standard error is empty
 ```
+
+Hello, world
+=============================================================================
+
+This scenario runs `/bin/echo` to produce the output "hello, world".
+
+```fable
+when user runs echo with arguments hello, world
+then exit code is 0
+and standard output contains "hello, world"
+and standard error is empty
+```
diff --git a/echo.py b/echo.py
index 9ec8437..abc0e52 100644
--- a/echo.py
+++ b/echo.py
@@ -13,15 +13,22 @@ def assertEqual(a, b):
         raise Exception(
             'expected {!r} == {!r}, but was disappointed'.format(a, b))
 
-def run_echo_without_args():
+def _run_echo(args):
     cmd = '/bin/echo'
     p = subprocess.Popen(
-        [cmd], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+        [cmd] + args, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
+        text=True)
     out, err = p.communicate()
     context["stdout"] = out
     context["stderr"] = err
     context["exit_code"] = p.returncode
 
+def run_echo_without_args():
+    _run_echo([])
+
+def run_echo_with_args(args=None):
+    _run_echo(args.split())
+
 def exit_code_is_zero(exit_code=None):
     exit_code = int(exit_code)
     assertEqual(_get("exit_code"), exit_code)
@@ -29,5 +36,8 @@ def exit_code_is_zero(exit_code=None):
 def stdout_is_a_newline():
     assertEqual(_get('stdout'), '\n')
 
+def stdout_is_text(text=None):
+    assertEqual(_get('stdout'), text + '\n')
+
 def stderr_is_empty():
     assertEqual(_get('stderr'), '')
diff --git a/echo.yaml b/echo.yaml
index 521ca25..6937d3d 100644
--- a/echo.yaml
+++ b/echo.yaml
@@ -1,11 +1,17 @@
 - when: user runs echo without arguments
   function: run_echo_without_args
 
-  - then: exit code is (?P<exit_code>\d+)
+- when: user runs echo with arguments (?P<args>.+)
+  function: run_echo_with_args
+
+- then: exit code is (?P<exit_code>\d+)
   function: exit_code_is_zero
 
 - then: standard output contains a newline
   function: stdout_is_a_newline
 
+- then: standard output contains "(?P<text>.*)"
+  function: stdout_is_text
+
 - then: standard error is empty
   function: stderr_is_empty
-- 
cgit v1.2.1