Add initial python shell test

More of #209

python/jsbeautifier/__init__.py

@@ -1288,6 +1288,7 @@ def main():
             return usage()
 
     if not file:
+        print("Must define at least one file.")
         return usage()
     else:
         if outfile == 'stdout':

python/jsbeautifier/tests/shell-smoke-test.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+
+REL_SCRIPT_DIR="`dirname \"$0\"`"
+SCRIPT_DIR="`( cd \"$REL_SCRIPT_DIR\" && pwd )`"
+
+test_cli_common()
+{
+  echo ----------------------------------------
+  echo Testing common cli behavior...
+  CLI_SCRIPT_NAME=${1:?missing_param}
+  CLI_SCRIPT=$SCRIPT_DIR/../../$CLI_SCRIPT_NAME
+  echo Script: $CLI_SCRIPT
+
+  # should find the minimal help output
+  $CLI_SCRIPT 2>&1 | grep -q "Must define at least one file\." || {
+      echo "[$CLI_SCRIPT_NAME] Output should be help message."
+      exit 1
+  }
+
+# Not working yet for python
+#   $CLI_SCRIPT 2> /dev/null && {
+#       echo "[$CLI_SCRIPT_NAME (with no parameters)] Return code should be error."
+#       exit 1
+#   }
+
+# Not working yet for python
+#   $CLI_SCRIPT -invalidParameter 2> /dev/null && {
+#       echo "[$CLI_SCRIPT_NAME -invalidParameter] Return code should be error."
+#       exit 1
+#   }
+
+  $CLI_SCRIPT -h > /dev/null || {
+      echo "[$CLI_SCRIPT_NAME -h] Return code should be success."
+      exit 1
+  }
+
+  $CLI_SCRIPT -v > /dev/null || {
+      echo "[$CLI_SCRIPT_NAME -v] Return code should be success."
+      exit 1
+  }
+
+}
+
+test_cli_js_beautify()
+{
+  echo ----------------------------------------
+  echo Testing js-beautify cli behavior...
+  CLI_SCRIPT=$SCRIPT_DIR/../../js-beautify
+
+  $CLI_SCRIPT $SCRIPT_DIR/../../../js/bin/js-beautify.js > /dev/null || {
+      echo "js-beautify output for $SCRIPT_DIR/../bin/js-beautify.js was expected succeed."
+      exit 1
+  }
+
+  $CLI_SCRIPT $SCRIPT_DIR/../../../js/bin/css-beautify.js > /dev/null || {
+      echo "js-beautify output for $SCRIPT_DIR/../bin/css-beautify.js was expected succeed."
+      exit 1
+  }
+
+  $CLI_SCRIPT $SCRIPT_DIR/../../../js/bin/js-beautify.js | diff $SCRIPT_DIR/../../../js/bin/js-beautify.js - || {
+      echo "js-beautify output for $SCRIPT_DIR/../bin/js-beautify.js was expected to be unchanged."
+      exit 1
+  }
+
+  $CLI_SCRIPT $SCRIPT_DIR/../../../js/bin/css-beautify.js | diff -q $SCRIPT_DIR/../../../js/bin/css-beautify.js - && {
+      echo "js-beautify output for $SCRIPT_DIR/../bin/css-beautify.js was expected to be different."
+      exit 1
+  }
+
+}
+
+#test_cli_common css-beautify
+#test_cli_common html-beautify
+test_cli_common js-beautify
+
+test_cli_js_beautify
+
+echo ----------------------------------------
+echo $0 - PASSED.
+echo ----------------------------------------