add tests to verify json configs are valid

test/verifyConfigs.test.ts

@@ -0,0 +1,41 @@
+import * as assert from 'assert';
+import * as path from 'path';
+import * as fs from 'fs';
+
+const REPOS_JSON = path.join(__dirname,'../../repos.json');
+const USERS_JSON = path.join(__dirname,'../../users.json');
+
+describe('Verify config files', () => {
+  it('repos.json is valid json', () => {
+    const file = fs.readFileSync(REPOS_JSON, 'utf-8');
+    assert.doesNotThrow(() => JSON.parse(file));
+  });
+
+  it('users.json is valid json', () => {
+    const file = fs.readFileSync(USERS_JSON, 'utf-8');
+    assert.doesNotThrow(() => JSON.parse(file));
+  });
+
+  it('users.json has valid schema', () => {
+    // tslint:disable-next-line:no-any
+    const assertArrayOfStrings = (array: any) =>
+      assert(Array.isArray(array) && array.every((elem) => typeof elem === 'string'));
+
+    // tslint:disable-next-line:no-any
+    const assertMembership = (membership: any) => {
+      assert('string', typeof membership.team);
+      assertArrayOfStrings(membership.users);
+      assertArrayOfStrings(membership.repos);
+    };
+
+    const file = fs.readFileSync(USERS_JSON, 'utf-8');
+    const users = JSON.parse(file);
+
+    assert('object', typeof users);
+
+    assertArrayOfStrings(users.orgs);
+
+    assert(Array.isArray(users.membership));
+    users.membership.forEach(assertMembership);
+  });
+})