boundimage: Add tmt tests for bound images

These tests validate the basic use case of switching and upgrading
an image with bound images that need to be pulled.

Signed-off-by: Chris Kyrouac <ckyrouac@redhat.com>

plans/test-21-logically-bound.fmf

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+# 
+provision:
+  how: virtual
+  # Generated by make test-tmt
+  image: file://./target/testvm/disk.qcow2
+  disk: 20
+summary: Execute local upgrade tests
+execute:
+  how: tmt
+  # We avoid writing nontrivial shell script as a general rule,
+  # so this is written in nu.
+  script: exec nu tests/booted/test-logically-bound.nu

tests/booted/test-logically-bound.nu

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+# This test does:
+# bootc image switch bootc-bound-image
+# <verify bound images are pulled>
+# <reboot>
+# <verify booted state>
+# bootc upgrade
+# <verify new boudn images are pulled>
+# <reboot>
+# <verify booted state>
+
+use std assert
+use tap.nu
+
+# This code runs on *each* boot.
+bootc status
+let st = bootc status --json | from json
+let booted = $st.status.booted.image
+
+def initial_setup [] {
+    bootc image copy-to-storage
+    podman images
+    podman image inspect localhost/bootc | from json
+}
+
+def build_image [name images containers] {
+    let td = mktemp -d
+    cd $td
+    mkdir usr/share/containers/systemd
+
+    mut dockerfile = "FROM localhost/bootc
+COPY usr/ /usr/
+RUN echo sanity check > /usr/share/bound-image-sanity-check.txt
+" | save Dockerfile
+
+    for image in $images {
+        echo $"[Image]\nImage=($image.image)" | save $"usr/share/containers/systemd/($image.name).image"
+        if $image.bound == true {
+            # these extra RUNs are suboptimal
+            # however, this is just a test image and the extra RUNs will only add a couple extra layers
+            # the benefit is simplified file creation, i.e. we don't need to handle adding "&& \" to each line
+            echo $"RUN ln -s /usr/share/containers/systemd/($image.name).image /usr/lib/bootc/bound-images.d/($image.name).image\n" | save Dockerfile --append
+        }
+    }
+
+    for container in $containers {
+        echo $"[Container]\nImage=($container.image)" | save $"usr/share/containers/systemd/($container.name).container"
+        if $container.bound == true {
+            echo $"RUN ln -s /usr/share/containers/systemd/($container.name).container /usr/lib/bootc/bound-images.d/($container.name).container\n" | save Dockerfile --append
+        }
+    }
+
+    # Build it
+    podman build -t $name .
+    # Just sanity check it
+    let v = podman run --rm $name cat /usr/share/bound-image-sanity-check.txt | str trim
+    assert equal $v "sanity check"
+}
+
+def verify_images [images containers] {
+    let bound_images = $images | where bound == true
+    let bound_containers = $containers | where bound == true
+    let num_bound = ($bound_images | length) + ($bound_containers | length)
+
+    let image_names = podman images --format json | from json | select -i Names
+
+    for $image in $bound_images {
+        let found = $image_names | where Names == [$image.image]
+        assert (($found | length) > 0) $"($image.image) not found"
+    }
+
+    for $container in $bound_containers {
+        let found = $image_names | where Names == [$container.image]
+        assert (($found | length) > 0) $"($container.image) not found"
+    }
+}
+
+def first_boot [] {
+    tap begin "bootc switch with bound images"
+
+    initial_setup
+
+    # build a bootc image that includes bound images
+    let images = echo [
+        { "bound": true, "image": "registry.access.redhat.com/ubi9/ubi-minimal:9.4", "name": "ubi-minimal" },
+        { "bound": false, "image": "quay.io/centos-bootc/centos-bootc:stream9", "name": "centos-bootc" }
+    ]
+
+    let containers = echo [{
+        "bound": true, "image": "docker.io/library/alpine:latest", "name": "alpine" 
+    }]
+
+    let image_name = "localhost/bootc-bound"
+    build_image $image_name $images $containers
+    bootc switch --transport containers-storage $image_name
+    verify_images $images $containers
+    tmt-reboot
+}
+
+def second_boot [] {
+    print "verifying second boot after switch"
+    assert equal $booted.image.transport containers-storage
+    assert equal $booted.image.image localhost/bootc-bound
+
+    # verify images are still there after boot
+    let images = echo [
+        { "bound": true, "image": "registry.access.redhat.com/ubi9/ubi-minimal:9.4", "name": "ubi-minimal" },
+        { "bound": false, "image": "quay.io/centos-bootc/centos-bootc:stream9", "name": "centos-bootc" }
+    ]
+
+    let containers = echo [{
+        "bound": true, "image": "docker.io/library/alpine:latest", "name": "alpine" 
+    }]
+    verify_images $images $containers
+
+    # build a new bootc image with an additional bound image
+    print "bootc upgrade with another bound image"
+    let image_name = "localhost/bootc-bound"
+    let more_images = $images | append [{ "bound": true, "image": "registry.access.redhat.com/ubi9/ubi-minimal:9.3", "name": "ubi-minimal-9-3" }]
+    build_image $image_name $more_images $containers
+    bootc upgrade
+    verify_images $more_images $containers
+    tmt-reboot
+}
+
+def third_boot [] {
+    print "verifying third boot after upgrade"
+    assert equal $booted.image.transport containers-storage
+    assert equal $booted.image.image localhost/bootc-bound
+
+    let images = echo [
+        { "bound": true, "image": "registry.access.redhat.com/ubi9/ubi-minimal:9.4", "name": "ubi-minimal" },
+        { "bound": true, "image": "registry.access.redhat.com/ubi9/ubi-minimal:9.3", "name": "ubi-minimal-9-3" },
+        { "bound": false, "image": "quay.io/centos-bootc/centos-bootc:stream9", "name": "centos-bootc" }
+    ]
+
+    let containers = echo [{
+        "bound": true, "image": "docker.io/library/alpine:latest", "name": "alpine" 
+    }]
+
+    verify_images $images $containers
+    tap ok
+}
+
+def main [] {
+    match $env.TMT_REBOOT_COUNT? {
+        null | "0" => first_boot,
+        null | "1" => second_boot,
+        null | "2" => third_boot,
+        $o => { error make { msg: $"Invalid TMT_REBOOT_COUNT ($o)" } },
+    }
+}