Added tests to verify env works.

Closes: #2

Author: docwhat

examples/testing/testing.template

@@ -16,10 +16,12 @@ Functions
 Environment variables
 ---------------------
 
--   HOME: `{{env "HOME"}}`
--   USER: `{{env "USER"}}`
--   TERM: `{{env "TERM"}}`
--   PATH: `{{env "PATH"}}`
+-   HOME:         `{{env "HOME"}}`
+-   USER:         `{{env "USER"}}`
+-   TERM:         `{{env "TERM"}}`
+-   PATH:         `{{env "PATH"}}`
+-   RUNNING_WITH: `{{env "RUNNING_WITH"}}`
+-   TODAY_IS:     `{{env "TODAY_IS"}}`
 
 Data
 ----

script/test

@@ -21,9 +21,9 @@ for example in examples/*; do
   template=$(compgen -G "${example}"/*.template || :)
   json=$(compgen -G "${example}/*.json" || :)
   if [ -r "${json}" ]; then
-    go run ./*.go --json-data "$json" "$template"
+    env RUNNING_WITH=json TODAY_IS="$(date)" go run ./*.go --json-data "$json" "$template"
   else
-    go run ./*.go "$template"
+    env RUNNING_WITH=env TODAY_IS="$(date)" go run ./*.go "$template"
   fi
 done