Renamed behaviour to behavior. (#1151)

test/token/ERC20/BurnableToken.behavior.js

@@ -0,0 +1,102 @@
+const { assertRevert } = require('../../helpers/assertRevert');
+const { inLogs } = require('../../helpers/expectEvent');
+
+const BigNumber = web3.BigNumber;
+const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000';
+
+require('chai')
+  .use(require('chai-bignumber')(BigNumber))
+  .should();
+
+function shouldBehaveLikeBurnableToken (owner, initialBalance, [burner]) {
+  describe('burn', function () {
+    describe('when the given amount is not greater than balance of the sender', function () {
+      const amount = 100;
+
+      beforeEach(async function () {
+        ({ logs: this.logs } = await this.token.burn(amount, { from: owner }));
+      });
+
+      it('burns the requested amount', async function () {
+        const balance = await this.token.balanceOf(owner);
+        balance.should.be.bignumber.equal(initialBalance - amount);
+      });
+
+      it('emits a burn event', async function () {
+        const event = await inLogs(this.logs, 'Burn');
+        event.args.burner.should.eq(owner);
+        event.args.value.should.be.bignumber.equal(amount);
+      });
+
+      it('emits a transfer event', async function () {
+        const event = await inLogs(this.logs, 'Transfer');
+        event.args.from.should.eq(owner);
+        event.args.to.should.eq(ZERO_ADDRESS);
+        event.args.value.should.be.bignumber.equal(amount);
+      });
+    });
+
+    describe('when the given amount is greater than the balance of the sender', function () {
+      const amount = initialBalance + 1;
+
+      it('reverts', async function () {
+        await assertRevert(this.token.burn(amount, { from: owner }));
+      });
+    });
+  });
+
+  describe('burnFrom', function () {
+    describe('on success', function () {
+      const amount = 100;
+
+      beforeEach(async function () {
+        await this.token.approve(burner, 300, { from: owner });
+        const { logs } = await this.token.burnFrom(owner, amount, { from: burner });
+        this.logs = logs;
+      });
+
+      it('burns the requested amount', async function () {
+        const balance = await this.token.balanceOf(owner);
+        balance.should.be.bignumber.equal(initialBalance - amount);
+      });
+
+      it('decrements allowance', async function () {
+        const allowance = await this.token.allowance(owner, burner);
+        allowance.should.be.bignumber.equal(200);
+      });
+
+      it('emits a burn event', async function () {
+        const event = await inLogs(this.logs, 'Burn');
+        event.args.burner.should.eq(owner);
+        event.args.value.should.be.bignumber.equal(amount);
+      });
+
+      it('emits a transfer event', async function () {
+        const event = await inLogs(this.logs, 'Transfer');
+        event.args.from.should.eq(owner);
+        event.args.to.should.eq(ZERO_ADDRESS);
+        event.args.value.should.be.bignumber.equal(amount);
+      });
+    });
+
+    describe('when the given amount is greater than the balance of the sender', function () {
+      const amount = initialBalance + 1;
+      it('reverts', async function () {
+        await this.token.approve(burner, amount, { from: owner });
+        await assertRevert(this.token.burnFrom(owner, amount, { from: burner }));
+      });
+    });
+
+    describe('when the given amount is greater than the allowance', function () {
+      const amount = 100;
+      it('reverts', async function () {
+        await this.token.approve(burner, amount - 1, { from: owner });
+        await assertRevert(this.token.burnFrom(owner, amount, { from: burner }));
+      });
+    });
+  });
+}
+
+module.exports = {
+  shouldBehaveLikeBurnableToken,
+};