add interop test

test/transparency-dev.test.ts

@@ -0,0 +1,21 @@
+import api from '../src'
+
+import fs from 'fs'
+
+const { treeHead } = api
+
+describe('transparency dev examples', () => {
+  it('matches go tests', async () => {
+    const entries = [
+      fs.readFileSync('./examples/transparency-dev/f1.txt'),
+      fs.readFileSync('./examples/transparency-dev/f2.txt')
+    ]
+    const root1 = await treeHead(entries)
+    expect(Buffer.from(root1).toString('hex')).toBe('1798faa3eb85affab608a28cf885a24a13af4ec794fe3abec046f21b7a799bec')
+    entries.push(
+      fs.readFileSync('./examples/transparency-dev/f3.txt')
+    )
+    const root2 = await treeHead(entries)
+    expect(Buffer.from(root2).toString('hex')).toBe('3322c85256086aa0e1984dff85eab5f1e11d4b8fbbd6c4510611e3bbab0e132a')
+  })
+})