system tests: avoid rmi -a ... plus cleanup

I noticed 'rmi -a' in a test. I tried to fix it. Hilarity ensued.

'rmi -a' is evil: it forces a fresh pull of our test image,
which in turn almost guarantees a flake some day. We avoid
it, but once in a while it slips in.

While fixing it, I noticed a bevy of other problems that
needed cleanup.

Signed-off-by: Ed Santiago <[email protected]>

test/system/070-build.bats

@@ -757,7 +757,7 @@ EOF
         is "$output" "[no instance of 'Using cache']" "no cache used"
     fi
 
-    run_podman rmi -a --force
+    run_podman rmi -f build_test
 }
 
 # Caveat lector: this test was mostly copy-pasted from buildah in #9275.

test/system/250-systemd.bats

@@ -27,7 +27,6 @@ function teardown() {
         rm -f "$UNIT_FILE"
         systemctl daemon-reload
     fi
-    run_podman rmi -a
 
     basic_teardown
 }
@@ -53,10 +52,17 @@ function service_setup() {
 
 # Helper to stop a systemd service running a container
 function service_cleanup() {
-    local status=$1
     run systemctl stop "$SERVICE_NAME"
     assert $status -eq 0 "Error stopping systemd unit $SERVICE_NAME: $output"
 
+    # Regression test for #11304: confirm that unit stops into correct state
+    local expected_state="$1"
+    if [[ -n "$expected_state" ]]; then
+        run systemctl show --property=ActiveState "$SERVICE_NAME"
+        assert "$output" = "ActiveState=$expected_state" \
+               "state of service after systemctl stop"
+    fi
+
     run systemctl disable "$SERVICE_NAME"
     assert $status -eq 0 "Error disabling systemd unit $SERVICE_NAME: $output"
 
@@ -88,26 +94,28 @@ function service_cleanup() {
 @test "podman autoupdate local" {
     # Note that the entrypoint may be a JSON string which requires preserving the quotes (see #12477)
     cname=$(random_string)
-    run_podman create --name $cname --label "io.containers.autoupdate=local" --entrypoint '["top"]' $IMAGE
+
+    # Create a scratch image (copy of our regular one)
+    image_copy=base$(random_string | tr A-Z a-z)
+    run_podman tag $IMAGE $image_copy
+
+    # Create a container based on that
+    run_podman create --name $cname --label "io.containers.autoupdate=local" --entrypoint '["top"]' $image_copy
 
     # Start systemd service to run this container
     service_setup
 
     # Give container time to start; make sure output looks top-like
-    sleep 2
-    run_podman logs $cname
-    is "$output" ".*Load average:.*" "running container 'top'-like output"
-
-    # Save the container id before updating
-    run_podman ps --format '{{.ID}}'
+    wait_for_output 'Load average' $cname
 
     # Run auto-update and check that it restarted the container
-    run_podman commit --change "CMD=/bin/bash" $cname $IMAGE
+    run_podman commit --change "CMD=/bin/bash" $cname $image_copy
     run_podman auto-update
     is "$output" ".*$SERVICE_NAME.*" "autoupdate local restarted container"
 
     # All good. Stop service, clean up.
     service_cleanup
+    run_podman rmi $image_copy
 }
 
 # These tests can fail in dev. environment because of SELinux.
@@ -235,6 +243,7 @@ LISTEN_FDNAMES=listen_fdnames" | sort)
 
     run_podman rm -f $cname
     run_podman pod rm -f $podname
+    run_podman rmi $(pause_image)
 }
 
 @test "podman generate - systemd template only used on --new" {
@@ -295,6 +304,8 @@ LISTEN_FDNAMES=listen_fdnames" | sort)
     unit_file="contrib/systemd/system/${unit_name}"
     if [[ -e ${unit_file}.in ]]; then
         echo "# [Building & using $unit_name from source]" >&3
+        # Force regenerating unit file (existing one may have /usr/bin path)
+        rm -f $unit_file
         BINDIR=$(dirname $PODMAN) make $unit_file
         cp $unit_file $UNIT_DIR/$unit_name
     fi
@@ -360,6 +371,8 @@ EOF
     systemctl stop $service_name
     run_podman 1 container exists $service_container
     run_podman 1 pod exists test_pod
+    run_podman rmi $(pause_image)
+    rm -f $UNIT_DIR/$unit_name
 }
 
 @test "podman-system-service containers survive service stop" {