solana-program-examples/tokens/token-2022/metadata/anchor/tests/metadata.ts

import * as anchor from '@coral-xyz/anchor';
import type { Program } from '@coral-xyz/anchor';
import { unpack } from '@solana/spl-token-metadata';
import type { Metadata } from '../target/types/metadata';

describe('metadata', () => {
  const provider = anchor.AnchorProvider.env();
  anchor.setProvider(provider);

  const program = anchor.workspace.Metadata as Program<Metadata>;

  const mintKeypair = new anchor.web3.Keypair();

  const metadata = {
    name: 'OPOS',
    symbol: 'OPOS',
    uri: 'https://raw.githubusercontent.com/solana-developers/opos-asset/main/assets/DeveloperPortal/metadata.json',
  };

  it('Create Mint with MetadataPointer and TokenMetadata Extensions', async () => {
    const tx = await program.methods
      .initialize(metadata)
      .accounts({ mintAccount: mintKeypair.publicKey })
      .signers([mintKeypair])
      .rpc({ skipPreflight: true });
    console.log('Your transaction signature', tx);
  });

  it('Update existing metadata field', async () => {
    // Add your test here.
    const tx = await program.methods
      .updateField({
        field: { name: {} }, // Update the name field
        value: 'Solana',
      })
      .accounts({ mintAccount: mintKeypair.publicKey })
      .rpc({ skipPreflight: true });
    console.log('Your transaction signature', tx);
  });

  it('Update metadata with custom field', async () => {
    const tx = await program.methods
      .updateField({
        field: { key: { 0: 'color' } }, // Add a custom field named "color"
        value: 'red',
      })
      .accounts({ mintAccount: mintKeypair.publicKey })
      .rpc({ skipPreflight: true });
    console.log('Your transaction signature', tx);
  });

  it('Remove custom field', async () => {
    const tx = await program.methods
      .removeKey('color') // Remove the custom field named "color"
      .accounts({ mintAccount: mintKeypair.publicKey })
      .rpc({ skipPreflight: true });
    console.log('Your transaction signature', tx);
  });

  it('Change update authority', async () => {
    const tx = await program.methods
      .updateAuthority()
      .accounts({
        mintAccount: mintKeypair.publicKey,
        newAuthority: null, // Set the update authority to null
      })
      .rpc({ skipPreflight: true });
    console.log('Your transaction signature', tx);
  });

  it('Emit metadata, decode transaction logs', async () => {
    const txSignature = await program.methods
      .emit()
      .accounts({ mintAccount: mintKeypair.publicKey })
      .rpc({ commitment: 'confirmed', skipPreflight: true });
    console.log('Your transaction signature', txSignature);

    // Fetch the transaction response
    const transactionResponse = await provider.connection.getTransaction(txSignature, {
      commitment: 'confirmed',
    });

    // Extract the log message that starts with "Program return:"
    const prefix = 'Program return: ';
    let log = transactionResponse.meta.logMessages.find((log) => log.startsWith(prefix));
    log = log.slice(prefix.length);
    const [_, data] = log.split(' ', 2);

    // Decode the data from base64 and unpack it into TokenMetadata
    const buffer = Buffer.from(data, 'base64');
    const metadata = unpack(buffer);
    console.log('Metadata', metadata);
  });

  it('Emit metadata, decode simulated transaction', async () => {
    const simulateResponse = await program.methods.emit().accounts({ mintAccount: mintKeypair.publicKey }).simulate();

    // Extract the log message that starts with "Program return:"
    const prefix = 'Program return: ';
    let log = simulateResponse.raw.find((log) => log.startsWith(prefix));
    log = log.slice(prefix.length);
    const [_, data] = log.split(' ', 2);

    // Decode the data from base64 and unpack it into TokenMetadata
    const buffer = Buffer.from(data, 'base64');
    const metadata = unpack(buffer);
    console.log('Metadata', metadata);
  });
});