move gen_testcase to hacking/tests

* also use json instead of pprint

hacking/tests/gen_distribution_version_testcase.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python
+
+"""
+This script generated test_cases for test_distribution_version.py.
+
+To do so it outputs the relevant files from /etc/*release, the output of platform.dist() and the current ansible_facts regarding the distribution version.
+
+This assumes a working ansible version in the path.
+"""
+
+import platform
+import os.path
+import subprocess
+import json
+
+filelist = [
+        '/etc/oracle-release',
+        '/etc/slackware-version',
+        '/etc/redhat-release',
+        '/etc/vmware-release',
+        '/etc/openwrt_release',
+        '/etc/system-release',
+        '/etc/alpine-release',
+        '/etc/release',
+        '/etc/arch-release',
+        '/etc/os-release',
+        '/etc/SuSE-release',
+        '/etc/gentoo-release',
+        '/etc/os-release',
+        '/etc/lsb-release',
+        '/etc/altlinux-release',
+        '/etc/os-release',
+        '/etc/coreos/update.conf',
+]
+
+fcont = {}
+
+for f in filelist:
+    if os.path.exists(f):
+        s = os.path.getsize(f)
+        if s > 0 and s < 10000:
+            with open(f) as fh:
+                fcont[f] = fh.read()
+
+dist = platform.dist()
+
+
+facts = ['distribution', 'distribution_version', 'distribution_release', 'distribution_major_version']
+ansible_out = subprocess.check_output(['ansible', 'localhost', '-m', 'setup'])
+parsed = json.loads(ansible_out[ansible_out.index('{'):])
+ansible_facts = {}
+for fact in facts:
+    ansible_facts[fact] = parsed['ansible_facts']['ansible_'+fact]
+
+nicename = ansible_facts['distribution'] + ' ' + ansible_facts['distribution_version']
+
+output = {
+    'name': nicename,
+    'input': fcont,
+    'platform.dist': dist,
+    'result': ansible_facts,
+}
+
+print(json.dumps(output, indent=4))
+