Adding zsh completer and a couple more tests.

bin/zsh_complete.sh

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+# Source this file to activate auto completion for zsh using the bash compatibility
+# helper.
+#
+# source /path/to/zsh_complete.sh
+#
+# Typically that would be called somewhere in your .zshrc
+#
+# Note, the overwrite of _bash_complete() is to export COMP_LINE and COMP_POINT
+# That is only required for zsh <= edab1d3dbe61da7efe5f1ac0e40444b2ec9b9570
+#
+# https://github.com/zsh-users/zsh/commit/edab1d3dbe61da7efe5f1ac0e40444b2ec9b9570
+#
+# zsh relases prior to that version do not export the required env variables!
+#
+# It is planned to write a proper zsh auto completion soon. Please talk
+# to Frank Becker <[email protected]>.
+
+autoload -U bashcompinit
+bashcompinit -i
+
+_bash_complete() {
+  local ret=1
+  local -a suf matches
+  local -x COMP_POINT COMP_CWORD
+  local -a COMP_WORDS COMPREPLY BASH_VERSINFO
+  local -x COMP_LINE="$words"
+  local -A savejobstates savejobtexts
+
+  (( COMP_POINT = 1 + ${#${(j. .)words[1,CURRENT]}} + $#QIPREFIX + $#IPREFIX + $#PREFIX ))
+  (( COMP_CWORD = CURRENT - 1))
+  COMP_WORDS=( $words )
+  BASH_VERSINFO=( 2 05b 0 1 release )
+
+  savejobstates=( ${(kv)jobstates} )
+  savejobtexts=( ${(kv)jobtexts} )
+
+  [[ ${argv[${argv[(I)nospace]:-0}-1]} = -o ]] && suf=( -S '' )
+
+  matches=( ${(f)"$(compgen $@ -- ${words[CURRENT]})"} )
+
+  if [[ -n $matches ]]; then
+    if [[ ${argv[${argv[(I)filenames]:-0}-1]} = -o ]]; then
+      compset -P '*/' && matches=( ${matches##*/} )
+      compset -S '/*' && matches=( ${matches%%/*} )
+      compadd -Q -f "${suf[@]}" -a matches && ret=0
+    else
+      compadd -Q "${suf[@]}" -a matches && ret=0
+    fi
+  fi
+
+  if (( ret )); then
+    if [[ ${argv[${argv[(I)default]:-0}-1]} = -o ]]; then
+      _default "${suf[@]}" && ret=0
+    elif [[ ${argv[${argv[(I)dirnames]:-0}-1]} = -o ]]; then
+      _directories "${suf[@]}" && ret=0
+    fi
+  fi
+
+  return ret
+}
+
+complete -C aws_completer aws

tests/unit/elb/__init__.py

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+# Copyright 2012-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"). You
+# may not use this file except in compliance with the License. A copy of
+# the License is located at
+#
+#     http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+# ANY KIND, either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.

tests/unit/elb/test_register_instances_with_load_balancer.py

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+#!/usr/bin/env python
+# Copyright 2012-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"). You
+# may not use this file except in compliance with the License. A copy of
+# the License is located at
+#
+#     http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+# ANY KIND, either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.
+import unittest
+import awscli.clidriver
+
+
+class TestRegisterInstancesWithLoadBalancer(unittest.TestCase):
+
+    def setUp(self):
+        self.driver = awscli.clidriver.CLIDriver()
+        self.prefix = 'aws elb register-instances-with-load-balancer'
+
+    def test_one_instance(self):
+        cmdline = self.prefix
+        cmdline += ' --load-balancer-name my-lb'
+        cmdline += ' --instances {"instance_id":"i-12345678"}'
+        result = {'LoadBalancerName': 'my-lb',
+                  'Instances.member.1.InstanceId': 'i-12345678'}
+        params = self.driver.test(cmdline)
+        self.assertEqual(params, result)
+
+    def test_two_instance(self):
+        cmdline = self.prefix
+        cmdline += ' --load-balancer-name my-lb'
+        cmdline += ' --instances {"instance_id":"i-12345678"}'
+        cmdline += ' {"instance_id":"i-87654321"}'
+        result = {'LoadBalancerName': 'my-lb',
+                  'Instances.member.1.InstanceId': 'i-12345678',
+                  'Instances.member.2.InstanceId': 'i-87654321'}
+        params = self.driver.test(cmdline)
+        self.assertEqual(params, result)
+
+
+if __name__ == "__main__":
+    unittest.main()