Add tests

Author: ayrton

__tests__/index.test.ts

@@ -626,6 +626,11 @@ describe('cast', () => {
     expect(cast({ name: 'test', type: 'FLOAT64' }, '2.32')).toEqual(2.32)
   })
 
+  test('casts binary data to array of 8-bit unsigned integers', () => {
+    expect(cast({ name: 'test', type: 'BLOB' }, '')).toEqual(new Uint8Array([]))
+    expect(cast({ name: 'test', type: 'BLOB' }, 'Å')).toEqual(new Uint8Array([197]))
+  })
+
   test('casts JSON string to JSON object', () => {
     expect(cast({ name: 'test', type: 'JSON' }, '{ "foo": "bar" }')).toStrictEqual({ foo: 'bar' })
   })

src/index.ts

@@ -379,7 +379,7 @@ function decodeRow(row: QueryResultRow): Array<string | null> {
 }
 
 export function cast(field: Field, value: string | null): any {
-  if (value === '' || value == null) {
+  if (value == null) {
     return value
   }
 
@@ -393,7 +393,7 @@ export function cast(field: Field, value: string | null): any {
     case 'UINT24':
     case 'UINT32':
     case 'YEAR':
-      return parseInt(value, 10)
+      return value ? parseInt(value, 10) : value
     case 'FLOAT32':
     case 'FLOAT64':
       return parseFloat(value)
@@ -412,7 +412,7 @@ export function cast(field: Field, value: string | null): any {
     case 'BINARY':
       return uint8Array(value)
     case 'JSON':
-      return JSON.parse(decode(value))
+      return value ? JSON.parse(decode(value)) : value
     default:
       return decode(value)
   }