add integration test

Author: dylanhitt

commander_linux.yaml

@@ -37,4 +37,19 @@ tests:
     stdout:
       contains:
         - Use --dir to test directories with multiple test files
-    exit-code: 1
+    exit-code: 1
+
+  test nodes with stdin:
+    command: cat integration/linux/nodes.yaml | ./commander test -
+    stdout:
+      contains:
+        - ✓ [ssh-host] it should test ssh host
+        - ✓ [ssh-host] it should set env variable
+        - ✓ [ssh-host-default] it should be executed on ssh-host-default
+        - "- [ssh-host-default] it should skip, was skipped" 
+        - "- [ssh-host] it should skip, was skipped" 
+        - "- [local] it should skip, was skipped" 
+        - ✓ [ssh-host] it should test multiple hosts
+        - ✓ [ssh-host-default] it should test multiple hosts
+        - ✓ [local] it should test multiple hosts
+    exit-code: 0

commander_unix.yaml

@@ -134,4 +134,13 @@ tests:
         - ✓ [local] it should exit with error code
         - "- [local] it should skip, was skipped"
       line-count: 17
-    exit-code: 0
+    exit-code: 0
+
+  test retries with stdin:
+    command: cat integration/unix/retries.yaml | ./commander test -
+    stdout:
+      contains:
+        - ✗ [local] echo hello, retries 3
+        - ✓ [local] it should retry failed commands, retries 2
+        - ✗ [local] it should retry failed commands with an interval, retries 2
+    exit-code: 1

commander_windows.yaml

@@ -63,3 +63,10 @@ tests:
       contains:
         - ✗ [local] echo hello, retries 3
     exit-code: 1
+
+  test retries with stdin:
+    command: cat integration/windows/retries.yaml | commander.exe test -
+    stdout:
+      contains:
+        - ✗ [local] echo hello, retries 3
+    exit-code: 1