add: 有序矩阵中第K小的元素

test/array/kth-smallest-element-in-a-sorted-matrix.test.js

@@ -0,0 +1,20 @@
+import { kthSmallest } from '../../src/array/kth-smallest-element-in-a-sorted-matrix.js'
+
+test('有序矩阵中第K小的元素', () => {
+  expect(kthSmallest([
+    [1, 5, 9],
+    [10, 11, 13],
+    [12, 13, 15]
+  ], 8)).toBe(13)
+
+  expect(kthSmallest([
+    [1, 5, 7],
+    [3, 7, 8],
+    [4, 8, 9]
+  ], 4)).toBe(5)
+
+  expect(kthSmallest([
+    [1, 2],
+    [3, 4]
+  ], 3)).toBe(3)
+})