| 72 | } |
| 73 | |
| 74 | cursor(rows = 1, fn) { |
| 75 | this.options.simple = false |
| 76 | if (typeof rows === 'function') { |
| 77 | fn = rows |
| 78 | rows = 1 |
| 79 | } |
| 80 | |
| 81 | this.cursorRows = rows |
| 82 | |
| 83 | if (typeof fn === 'function') |
| 84 | return (this.cursorFn = fn, this) |
| 85 | |
| 86 | let prev |
| 87 | return { |
| 88 | [Symbol.asyncIterator]: () => ({ |
| 89 | next: () => { |
| 90 | if (this.executed && !this.active) |
| 91 | return { done: true } |
| 92 | |
| 93 | prev && prev() |
| 94 | const promise = new Promise((resolve, reject) => { |
| 95 | this.cursorFn = value => { |
| 96 | resolve({ value, done: false }) |
| 97 | return new Promise(r => prev = r) |
| 98 | } |
| 99 | this.resolve = () => (this.active = false, resolve({ done: true })) |
| 100 | this.reject = x => (this.active = false, reject(x)) |
| 101 | }) |
| 102 | this.execute() |
| 103 | return promise |
| 104 | }, |
| 105 | return() { |
| 106 | prev && prev(CLOSE) |
| 107 | return { done: true } |
| 108 | } |
| 109 | }) |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | describe() { |
| 114 | this.options.simple = false |