tests: add whoami check

tests/main/login/task.yaml

@@ -19,7 +19,7 @@ execute: |
         exit 1
     fi
 
-    if [[ $SPREAD_STORE_USER && $SPREAD_STORE_PASSWORD ]]; then
+    if [ -n "$SPREAD_STORE_USER" ] && [ -n "$SPREAD_STORE_PASSWORD" ]; then
         echo "Checking successful login"
         expect -d -f successful_login.exp
 

tests/main/whoami/successful_login.exp

@@ -0,0 +1,13 @@
+log_user 0
+spawn snap login $env(SPREAD_STORE_USER)
+
+expect "Password of "
+send "$env(SPREAD_STORE_PASSWORD)\n"
+
+expect {
+    "Login successful" {
+        exit 0
+    } default {
+        exit 1
+    }
+}

tests/main/whoami/task.yaml

@@ -0,0 +1,18 @@
+summary: Checks for snap whoami
+
+# ppc64el disabled because of https://bugs.launchpad.net/snappy/+bug/1655594
+systems: [-ubuntu-core-16-*, -ubuntu-*-ppc64el]
+
+restore: |
+    snap logout || true
+
+execute: |
+    echo "whoami before login"
+    snap whoami | MATCH "email: -"
+
+    if [ -n "$SPREAD_STORE_USER" ] && [ -n "$SPREAD_STORE_PASSWORD" ]; then
+        expect -d -f successful_login.exp
+
+        echo "whoami after login"
+        snap whoami | MATCH "email: $SPREAD_STORE_USER"
+    fi