async function test_utils_get_group_identifier_and_epoch() {
const mls = new MLS();
// Generate Identities for Alice and Bob
let alice = await mls.generateIdentity();
let bob = await mls.generateIdentity();
// Generate Credentials for Alice and Bob
let credential_alice = await mls.generateCredential("alice");
let credential_bob = await mls.generateCredential("bob");
// Generate a KeyPackage for Bob
let kp_bob = await mls.generateKeyPackage(bob, credential_bob);
// Creation of a Group by Alice
let group_alice = await mls.groupCreate(alice, credential_alice);
// Test: compare the group identifier to the invalid value
info("Group Id:", byteArrayToHexString(group_alice.groupId));
isnot(byteArrayToHexString(group_alice.groupId), "", "Group Identifier != ''");
// Alice adds Bob to a group
let commit_output = await group_alice.add(kp_bob);
// Test: compare the commit output to the invalid value
info("Commit Output:", byteArrayToHexString(commit_output.commit));
isnot(byteArrayToHexString(commit_output.commit), "", "Commit != ''");
// Get the group details
let details = await group_alice.details();
info("Group Id:", byteArrayToHexString(details.groupId));
info("Group Epoch:", byteArrayToHexString(details.groupEpoch));
// Get the group identifier from the commit
let gid_commit = await mls.getGroupIdFromMessage(commit_output.commit);
info("Group Id from Commit Message:", byteArrayToHexString(gid_commit.content));
// Get the group identifier from the commit
let epoch_commit = await mls.getGroupEpochFromMessage(commit_output.commit);
info("Group Epoch from Commit Message:", byteArrayToHexString(epoch_commit.content));
// Note: the following is forbidden because Welcome is not an MLSMessage
// let gid_welcome = await mls.getGroupIdFromMessage(commit_output.welcome);
// info("Group Id from Welcome Message:", byteArrayToHexString(gid_welcome.content));
// Test: compare the group id of the commit to the current group id
is(byteArrayToHexString(details.groupId), byteArrayToHexString(gid_commit.content));
// Test: compare the group epoch of the commit to the current group epoch
is(byteArrayToHexString(details.groupEpoch), byteArrayToHexString(epoch_commit.content));
// Alice: process her Add commit
await group_alice.receive(commit_output.commit);
// Get the group details after processing the commit
let details2 = await group_alice.details();
info("Group Epoch 2:", byteArrayToHexString(details2.groupEpoch));
// Alice: removed Bob
let commit_output2 = await group_alice.remove(bob);
// Get the group identifier from the commit
let gid_commit2 = await mls.getGroupIdFromMessage(commit_output2.commit);
info("Group Id 2 from Commit Message 2:", byteArrayToHexString(gid_commit2.content));
// Get the group identifier from the commit2
let epoch_commit2 = await mls.getGroupEpochFromMessage(commit_output2.commit);
info("Group Epoch 2 from Commit Message 2:", byteArrayToHexString(epoch_commit2.content));
// Test: compare the group id of the commit to the current group id
is(byteArrayToHexString(details2.groupId), byteArrayToHexString(gid_commit2.content));
// Test: compare the group epoch of the commit to the current group epoch
is(byteArrayToHexString(details2.groupEpoch), byteArrayToHexString(epoch_commit2.content));
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