test: run binary-codec tests in the browser (#2566)

- Convert tests to typescript
- Update type definitions causing errors in tests
  - `makeParser` to accept a `Buffer` in addition to `string`
  - `SerializedType` constructor allows not passing in a byte array
  - `Comparable` is now a generic type so that it allows `compareTo`
methods to take more that the type itself. Example: `Uint64.compareTo`
can accept `number`
- Update tests to use jasmine compatible functions
  - Switching from `test` to `it`.
  - Updated test checking if coretypes all implement SerializedType
  - Import fixtures directly instead of using `loadFixture` utility
- Remove importing of `buffer/` explicitly.  It was throwing off type
checking in tests.  Buffer is going away in a future PR anyway.
- Fixed `npm run clean` not clearing `.tsbuildinfo` files for keypairs
- Remove unused account-tx-transactions.db. It was likely used in the
past to test historical ledgers.

packages/ripple-binary-codec/test/binary-json.test.ts

@@ -0,0 +1,45 @@
+import fixtures from './fixtures/codec-fixtures.json'
+import { decode, encode, decodeLedgerData } from '../src'
+
+function json(object) {
+  return JSON.stringify(object)
+}
+
+function truncateForDisplay(longStr) {
+  return `${longStr.slice(0, 10)} ... ${longStr.slice(-10)}`
+}
+
+describe('ripple-binary-codec', function () {
+  function makeSuite(name, entries) {
+    describe(name, function () {
+      entries.forEach((t, testN) => {
+        it(`${name}[${testN}] can encode ${truncateForDisplay(
+          json(t.json),
+        )} to ${truncateForDisplay(t.binary)}`, () => {
+          expect(encode(t.json)).toEqual(t.binary)
+        })
+        it(`${name}[${testN}] can decode ${truncateForDisplay(
+          t.binary,
+        )} to ${truncateForDisplay(json(t.json))}`, () => {
+          const decoded = decode(t.binary)
+          expect(decoded).toEqual(t.json)
+        })
+      })
+    })
+  }
+  makeSuite('transactions', fixtures.transactions)
+  makeSuite('accountState', fixtures.accountState)
+
+  describe('ledgerData', function () {
+    if (fixtures.ledgerData) {
+      fixtures.ledgerData.forEach((t, testN) => {
+        it(`ledgerData[${testN}] can decode ${t.binary} to ${json(
+          t.json,
+        )}`, () => {
+          const decoded = decodeLedgerData(t.binary)
+          expect(t.json).toEqual(decoded)
+        })
+      })
+    }
+  })
+})