fix(integer-base-converter): handle non-decimal char and better error message

src/utils/error.test.ts

@@ -0,0 +1,29 @@
+import { describe, expect, it } from 'vitest';
+import { getErrorMessageIfThrows } from './error';
+
+describe('error util', () => {
+  describe('getErrorMessageIfThrows', () => {
+    it('get an error message if the callback throws, undefined instead', () => {
+      expect(
+        getErrorMessageIfThrows(() => {
+          throw 'message';
+        }),
+      ).to.equal('message');
+
+      expect(
+        getErrorMessageIfThrows(() => {
+          throw new Error('message');
+        }),
+      ).to.equal('message');
+
+      expect(
+        getErrorMessageIfThrows(() => {
+          throw { message: 'message' };
+        }),
+      ).to.equal('message');
+
+      // eslint-disable-next-line @typescript-eslint/no-empty-function
+      expect(getErrorMessageIfThrows(() => {})).to.equal(undefined);
+    });
+  });
+});

src/utils/error.ts

@@ -0,0 +1,24 @@
+import _ from 'lodash';
+
+export { getErrorMessageIfThrows };
+
+function getErrorMessageIfThrows(cb: () => unknown) {
+  try {
+    cb();
+    return undefined;
+  } catch (err) {
+    if (_.isString(err)) {
+      return err;
+    }
+
+    if (_.isError(err)) {
+      return err.message;
+    }
+
+    if (_.isObject(err) && _.has(err, 'message')) {
+      return (err as { message: string }).message;
+    }
+
+    return 'An error as occurred.';
+  }
+}