lib: Add a unit test for parsing the host CRD

Just on general principle; prep for further refactoring.

lib/src/fixtures/spec.yaml

@@ -0,0 +1,40 @@
+apiVersion: org.containers.bootc/v1alpha1
+kind: BootcHost
+metadata:
+  name: host
+spec:
+  image:
+    image: quay.io/example/someimage:latest
+    transport: registry
+    signature: insecure
+status:
+  staged:
+    image:
+      image:
+        image: quay.io/example/someimage:latest
+        transport: registry
+        signature: insecure
+      version: nightly
+      timestamp: 2023-10-14T19:22:15Z
+      imageDigest: sha256:16dc2b6256b4ff0d2ec18d2dbfb06d117904010c8cf9732cdb022818cf7a7566
+    incompatible: false
+    pinned: false
+    ostree:
+      checksum: 3c6dad657109522e0b2e49bf44b5420f16f0b438b5b9357e5132211cfbad135d
+      deploySerial: 0
+  booted:
+    image:
+      image:
+        image: quay.io/example/someimage:latest
+        transport: registry
+        signature: insecure
+      version: nightly
+      timestamp: 2023-09-30T19:22:16Z
+      imageDigest: sha256:736b359467c9437c1ac915acaae952aad854e07eb4a16a94999a48af08c83c34
+    incompatible: false
+    pinned: false
+    ostree:
+      checksum: 26836632adf6228d64ef07a26fd3efaf177104efd1f341a2cf7909a3e4e2c72c
+      deploySerial: 0
+  rollback: null
+  isContainer: false

lib/src/spec.rs

@@ -101,3 +101,18 @@ pub struct HostStatus {
     /// Whether or not the current system state is an ostree-based container
     pub is_container: bool,
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_spec() {
+        const SPEC_FIXTURE: &str = include_str!("fixtures/spec.yaml");
+        let host: Host = serde_yaml::from_str(SPEC_FIXTURE).unwrap();
+        assert_eq!(
+            host.spec.image.as_ref().unwrap().image.as_str(),
+            "quay.io/example/someimage:latest"
+        );
+    }
+}