test: add 'golden output' tests for umoci-stat

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>

Author: cyphar

test/stat.bats

@@ -139,6 +139,9 @@ Descriptor:
 == CONFIG ==
 Created: 2025-09-05T13:05:10.12345+10:00
 Author: ""
+Platform:
+	OS: $(go env GOOS)
+	Architecture: $(go env GOARCH)
 Image Config:
 	User: ""
 	Command:
@@ -178,6 +181,151 @@ EOF
 	[ "$status" -eq 0 ]
 }
 
+IMAGE_STAT="$(cat <<EOF
+== MANIFEST ==
+Schema Version: 2
+Media Type: application/vnd.oci.image.manifest.v1+json
+Config:
+	Descriptor:
+		Media Type: application/vnd.oci.image.config.v1+json
+		Digest: sha256:01a6fc95c8afce1ebfaca585848ff2c42fe89ea0f5913c8e8fd6a0f8b691cd39
+		Size: 1.107kB
+Layers:
+	Descriptor:
+		Media Type: application/vnd.oci.image.layer.v1.tar+gzip
+		Digest: sha256:088ca2b11e89a40e143aeb9d4564d0ffb69d26a380b3341af07fa28c2dbdaece
+		Size: 238B
+		Annotations:
+			ci.umo.uncompressed_blob_size: 4608
+	Descriptor:
+		Media Type: application/vnd.oci.image.layer.v1.tar+zstd
+		Digest: sha256:92226702a21491c696a910e56da759a2d6fe979211a7ad91c60ca715b89bc059
+		Size: 119B
+		Annotations:
+			ci.umo.uncompressed_blob_size: 2048
+Annotations:
+	ci.umo.abc: "foobar\tbaz"
+	ci.umo.xyz: hello world
+Descriptor:
+	Media Type: application/vnd.oci.image.manifest.v1+json
+	Digest: sha256:58fa9705ecfc0ec7d1e8631a729c6cbab46206233d58e46fc55346ca9d25ed43
+	Size: 737B
+	Annotations:
+		org.opencontainers.image.ref.name: latest
+
+== CONFIG ==
+Created: 2025-09-05T13:05:10.12345+10:00
+Author: Aleksa Sarai <cyphar@cyphar.com>
+Platform:
+	OS: gnu+linux
+	Architecture: riscv64
+Image Config:
+	User: foo:bar
+	Entrypoint:
+		/bin/sh
+		-c
+	Command:
+		true
+	Working Directory: /tmp
+	Environment:
+		HOME=/
+		SHELL=/bin/false
+		AAA=1234
+		"ESCAPED=a\tb\nc\vd\re"
+	Stop Signal: SIGKILL
+	Exposed Ports: 80/tcp, 8080/udp
+	Volumes: /tmp, /var, "/with, comma"
+Descriptor:
+	Media Type: application/vnd.oci.image.config.v1+json
+	Digest: sha256:01a6fc95c8afce1ebfaca585848ff2c42fe89ea0f5913c8e8fd6a0f8b691cd39
+	Size: 1.107kB
+
+== HISTORY ==
+LAYER                                                                   CREATED                         CREATED BY            SIZE   COMMENT
+sha256:088ca2b11e89a40e143aeb9d4564d0ffb69d26a380b3341af07fa28c2dbdaece 1997-03-25T13:40:00Z            umoci insert          238B   basic insert
+sha256:92226702a21491c696a910e56da759a2d6fe979211a7ad91c60ca715b89bc059 1997-03-25T13:42:00Z            umoci insert --opaque 119B   whiteout /
+<none>                                                                  2025-09-05T13:05:10.12345+10:00 umoci config          <none> dummy configuration
+EOF
+)"
+
+@test "umoci stat [output snapshot]" {
+	IMAGE="$(setup_tmpdir)/image" TAG="latest"
+	STATFILE_DIR="$(setup_tmpdir)"
+
+	expected="${STATFILE_DIR}/expected"
+	cat >"$expected" <<<"$IMAGE_STAT"
+
+	umoci init --layout "${IMAGE}"
+	[ "$status" -eq 0 ]
+
+	umoci new --image "${IMAGE}:${TAG}"
+	[ "$status" -eq 0 ]
+
+	umoci config --no-history --image "${IMAGE}:${TAG}" \
+		--author="Aleksa Sarai <cyphar@cyphar.com>" \
+		--created="2025-09-05T13:05:10.12345+10:00" \
+		--os="gnu+linux" \
+		--architecture="riscv64"
+	[ "$status" -eq 0 ]
+
+	layer="$(setup_tmpdir)"
+	echo "dummy data" >"$layer/file"
+	ln -s "foo" "$layer/link"
+	mkdir -p "$layer/foo/bar/baz"
+	find "$layer" -print0 | xargs -0 touch -h -d "1997-03-25T13:40:00"
+
+	umoci insert --image "${IMAGE}:${TAG}" \
+		--history.author='Aleksa Sarai <cyphar@cyphar.com>' \
+		--history.comment="basic insert" \
+		--history.created="1997-03-25T13:40:00Z" \
+		"$layer" /
+	[ "$status" -eq 0 ]
+
+	layer="$(setup_tmpdir)"
+	find "$layer" -print0 | xargs -0 touch -h -d "1997-03-25T13:42:00"
+
+	umoci insert --image "${IMAGE}:${TAG}" \
+		--compress=zstd \
+		--history.author=$'Foo Bar <foo\tbar\nbaz@fake.email>' \
+		--history.comment="whiteout /" \
+		--history.created_by="umoci insert --opaque" \
+		--history.created="1997-03-25T13:42:00Z" \
+		--opaque "$layer" /foo
+	[ "$status" -eq 0 ]
+
+	umoci config --image "${IMAGE}:${TAG}" \
+		--config.user="foo:bar" \
+		--config.exposedports=80/tcp \
+		--config.exposedports=8080/udp \
+		--config.env="HOME=/" \
+		--config.env="SHELL=/bin/false" \
+		--config.env="AAA=1234" \
+		--config.env=$'ESCAPED=a\tb\nc\vd\re' \
+		--config.entrypoint="/bin/sh" \
+		--config.entrypoint="-c" \
+		--config.cmd="true" \
+		--config.volume="/tmp" \
+		--config.volume="/var" \
+		--config.volume="/with, comma" \
+		--config.workingdir="/tmp" \
+		--config.stopsignal="SIGKILL" \
+		--manifest.annotation=$'ci.umo.abc=foobar\tbaz' \
+		--manifest.annotation="ci.umo.xyz=hello world" \
+		--history.created="2025-09-05T13:05:10.12345+10:00" \
+		--history.author="Hello World <another dummy email@foo.com>" \
+		--history.comment="dummy configuration"
+	[ "$status" -eq 0 ]
+
+	umoci stat --image "${IMAGE}:${TAG}"
+	[ "$status" -eq 0 ]
+
+	got="${STATFILE_DIR}/got"
+	cat >"$got" <<<"$output"
+
+	sane_run diff -u "$expected" "$got"
+	[ "$status" -eq 0 ]
+}
+
 @test "umoci stat [invalid arguments]" {
 	# Missing --image argument.
 	umoci stat