Update docs

test/token/ERC1155/utils/ERC1155Holder.test.js

@@ -0,0 +1,64 @@
+const { BN } = require('@openzeppelin/test-helpers');
+
+const ERC1155Holder = artifacts.require('$ERC1155Holder');
+const ERC1155 = artifacts.require('$ERC1155');
+
+const { expect } = require('chai');
+
+const { shouldSupportInterfaces } = require('../../../utils/introspection/SupportsInterface.behavior');
+
+contract('ERC1155Holder', function (accounts) {
+  const [creator] = accounts;
+  const uri = 'https://token-cdn-domain/{id}.json';
+  const multiTokenIds = [new BN(1), new BN(2), new BN(3)];
+  const multiTokenValues = [new BN(1000), new BN(2000), new BN(3000)];
+  const transferData = '0x12345678';
+
+  beforeEach(async function () {
+    this.multiToken = await ERC1155.new(uri);
+    this.holder = await ERC1155Holder.new();
+    await this.multiToken.$_mintBatch(creator, multiTokenIds, multiTokenValues, '0x');
+  });
+
+  shouldSupportInterfaces(['ERC165', 'ERC1155Receiver']);
+
+  it('receives ERC1155 tokens from a single ID', async function () {
+    await this.multiToken.safeTransferFrom(
+      creator,
+      this.holder.address,
+      multiTokenIds[0],
+      multiTokenValues[0],
+      transferData,
+      { from: creator },
+    );
+
+    expect(await this.multiToken.balanceOf(this.holder.address, multiTokenIds[0])).to.be.bignumber.equal(
+      multiTokenValues[0],
+    );
+
+    for (let i = 1; i < multiTokenIds.length; i++) {
+      expect(await this.multiToken.balanceOf(this.holder.address, multiTokenIds[i])).to.be.bignumber.equal(new BN(0));
+    }
+  });
+
+  it('receives ERC1155 tokens from a multiple IDs', async function () {
+    for (let i = 0; i < multiTokenIds.length; i++) {
+      expect(await this.multiToken.balanceOf(this.holder.address, multiTokenIds[i])).to.be.bignumber.equal(new BN(0));
+    }
+
+    await this.multiToken.safeBatchTransferFrom(
+      creator,
+      this.holder.address,
+      multiTokenIds,
+      multiTokenValues,
+      transferData,
+      { from: creator },
+    );
+
+    for (let i = 0; i < multiTokenIds.length; i++) {
+      expect(await this.multiToken.balanceOf(this.holder.address, multiTokenIds[i])).to.be.bignumber.equal(
+        multiTokenValues[i],
+      );
+    }
+  });
+});