Simple test install from local yay

Signed-off-by: Jguer <me@jguer.space>

.travis.yml

@@ -12,6 +12,7 @@ arch:
   script:
   - make
   - make test
+  - ./testdata/install_test.sh
 
 script:
 - "curl -s https://raw.githubusercontent.com/mikkeloscar/arch-travis/master/arch-travis.sh | bash"

testdata/install_test.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+function error() {
+  echo "ERROR: $1"
+  exit 1
+}
+
+echo "Start simple"
+./yay -S shfmt --noconfirm || error "unable to make shfmt"
+
+./yay -Qsq shfmt || error "unable to install shfmt"
+
+exit 0