Add tests (#76)

tests/repo/vars.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+vars=()
+
+while read -r line
+do
+    if ! [[ $line =~ ^# ]]
+    then
+        vars+=$(echo $line | cut -d= -f1 | tr [:upper:] [:lower:])
+    fi
+    if [[ $line =~ ^########## ]]
+    then
+        break
+    fi
+done < Makefile
+
+result=0
+
+for var in $vars
+do
+    grep "^| ${var}" README.md > /dev/null
+    if [[ $? != 0 ]]
+    then
+        echo "$var not found in README.md"
+        result=1
+    fi
+done
+
+for var in $vars
+do
+    grep "^  ${var}:" action.yml > /dev/null
+    if [[ $? != 0 ]]
+    then
+        echo "$var not found in action.yml"
+        result=1
+    fi
+done
+
+exit ${result}