Add some config tests

Still some more to add

test/invalid-config-missing-alerts.yml

@@ -0,0 +1,9 @@
+check_interval: 1
+
+monitors:
+  - name: Command
+    command: ['echo', '$PATH']
+    alert_down: [ 'alert_down', 'log_shell', 'log_command' ]
+    # alert_every: -1
+    alert_every: 0
+

test/invalid-config-type.yml

@@ -0,0 +1 @@
+check_interval: woops, I'm not an int!

test/valid-config.yml

@@ -0,0 +1,22 @@
+check_interval: 1
+
+monitors:
+  - name: Command
+    command: ['echo', '$PATH']
+    alert_down: [ 'log_command', 'log_shell' ]
+    alert_every: 0
+  - name: Shell
+    command_shell: >
+      echo 'Some string with stuff';
+      echo 'another line';
+      echo $PATH;
+      exit 1
+    alert_down: [ 'log_command', 'log_shell' ]
+    alert_after: 5
+    alert_every: 0
+
+alerts:
+  log_command:
+    command: [ 'echo', 'regular', '"command!!!"', "{{.MonitorName}}" ]
+  log_shell:
+    command_shell: echo "Failure on {{.MonitorName}} User is $USER"