update integration test scripts

Signed-off-by: Meredith Lancaster <malancas@github.com>

test/integration/attestation-cmd/download/download.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ "$#" -ne 1 ]; then
+  echo "Usage: $0 <matrix-os>"
+  exit 1
+fi
+
+os=$1
+
+# Get the root directory of the repository
+rootDir="$(git rev-parse --show-toplevel)"
+
+ghBuildPath="$rootDir/bin/gh"
+
+artifactPath="$rootDir/pkg/cmd/attestation/test/data/sigstore-js-2.1.0.tgz"
+
+# Download attestations for the package
+if ! $ghBuildPath attestation download "$artifactPath" --owner=sigstore --digest-alg=sha512; then
+    # cleanup test data
+    echo "Failed to download attestations"
+    exit 1
+fi
+
+digest=$(shasum -a 512 sigstore-js-2.1.0.tgz.sha512 | awk '{print ""$1""}')
+
+attestation_filename="sha512:$digest.jsonl"
+if [ "$os" == "windows-latest" ]; then
+  echo "Running the test on Windows."
+  echo "Build the expected filename accordingly"
+  attestation_filename="sha512-$digest.jsonl"
+fi
+
+if [ ! -f "$attestation_filename" ]; then
+  echo "Expected attestation file $attestation_filename not found"
+  exit 1
+fi
+
+if [ ! -s "$attestation_filename" ]; then
+  echo "Attestation file $attestation_filename is empty"
+  rm "$attestation_filename"
+  exit 1
+fi
+
+cat "$attestation_filename"
+
+# Clean up the downloaded attestation file
+rm "$attestation_filename"

test/integration/attestation-cmd/run-all-tests.sh

@@ -1,13 +1,30 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+if [ "$#" -ne 1 ]; then
+  echo "Usage: $0 <matrix-os>"
+  exit 1
+fi
+
+os=$1
+
 # Get the root directory of the repository
 rootDir="$(git rev-parse --show-toplevel)"
 
 verify_test_dir="$rootDir/test/integration/attestation-cmd/verify"
+echo "Running all \"gh attestation verify\" tests"
 for script in "$verify_test_dir"/*.sh; do
   if [ -f "$script" ]; then
     echo "Running $script..."
-    $script
+    bash "$script"
+  fi
+done
+
+download_test_dir="$rootDir/test/integration/attestation-cmd/download"
+echo "Running all \"gh attestation download\" tests"
+for script in "$download_test_dir"/*.sh; do
+  if [ -f "$script" ]; then
+    echo "Running $script..."
+    bash "$script" "$os"
   fi
 done