Converts tests to TypeScript (#300)

packages/db/package.json

@@ -32,6 +32,7 @@
     "@polkadot/trie-hash": "^0.34.3",
     "@polkadot/util": "^0.34.3",
     "@types/mkdirp": "^0.5.2",
+    "@types/rimraf": "^2.0.2",
     "@types/snappy": "^6.0.0",
     "lru_map": "^0.3.3",
     "mkdirp": "^0.5.1",

packages/db/src/FileFlatDb/Compact.spec.ts

@@ -2,11 +2,6 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import mkdirp from 'mkdirp';
-import os from 'os';
-import path from 'path';
-import rimraf from 'rimraf';
-
 import FileFlatDb from './index';
 
 describe.skip('FileFlatDb (compacting)', () => {
@@ -14,7 +9,9 @@ describe.skip('FileFlatDb (compacting)', () => {
 
   it('compacts without failing', () => {
     expect(
-      combined.maintain(() => {})
+      combined.maintain(() => {
+        // noop
+      })
     ).not.toBe(0);
   });
 });

packages/db/src/FileFlatDb/index.spec.ts

@@ -3,7 +3,6 @@
 // of the Apache-2.0 license. See the LICENSE file for details.
 
 import mkdirp from 'mkdirp';
-import os from 'os';
 import path from 'path';
 import rimraf from 'rimraf';
 
@@ -42,11 +41,11 @@ const VAL_F = new Uint8Array([0x42, 1, 2, 3, 4, 5, 6, 0x69]);
 
 // NOTE Skipped, doesn't seem to be too happy on CI (cwd issues?)
 describe.skip('FileFlatDb (basics)', () => {
-  const testGet = (key, value) =>
-    expect(store.get(key)).toEqual(value);
-
   const location = path.join(process.cwd(), '--test-FileFlatDb');
-  let store;
+  let store: FileFlatDb;
+
+  const testGet = (key: Uint8Array, value: Uint8Array) =>
+    expect(store.get(key)).toEqual(value);
 
   beforeAll(() => {
     mkdirp.sync(location);

packages/db/src/engines/TransactionDb.spec.ts

@@ -71,7 +71,7 @@ describe('TransactionDb', () => {
           db.put(key, value);
 
           throw new Error('test');
-        })
+        });
       }
     ).toThrow(/test/);
     expect(memory.get(key)).toEqual(null);