1 files changed, 50 insertions, 0 deletions
diff --git a/deps/npm/test/tap/shrinkwrap-package-integrity.js b/deps/npm/test/tap/shrinkwrap-package-integrity.js
new file mode 100644
index 0000000000..6333757d7f
--- /dev/null
+++ b/deps/npm/test/tap/shrinkwrap-package-integrity.js
@@ -0,0 +1,50 @@
+'use strict'
+
+const pkgsri = require('../../lib/utils/package-integrity.js')
+const ssri = require('ssri')
+const test = require('tap').test
+
+test('generates integrity according to spec', (t) => {
+  const pkgJson = {
+    'name': 'foo',
+    'version': '1.0.0',
+    'dependencies': {
+      'x': '1.0.0'
+    },
+    'devDependencies': {
+      'y': '1.0.0'
+    },
+    'optionalDependencies': {
+      'z': '1.0.0'
+    }
+  }
+  const integrity = pkgsri.hash(pkgJson)
+  t.ok(integrity && integrity.toString(), 'hash returned')
+  t.equal(
+    ssri.parse(integrity).toString(),
+    integrity,
+    'hash is a valid ssri string'
+  )
+  t.ok(pkgsri.check(pkgJson, integrity), 'same-data integrity check succeeds')
+  t.done()
+})
+
+test('updates if anything changes in package.json', (t) => {
+  const pkgJson = {
+    'name': 'foo',
+    'version': '1.0.0',
+    'dependencies': {
+      'x': '1.0.0'
+    },
+    'devDependencies': {
+      'y': '1.0.0'
+    },
+    'optionalDependencies': {
+      'z': '1.0.0'
+    }
+  }
+  const sri = pkgsri.hash(pkgJson)
+  pkgJson.version = '1.2.3'
+  t.equal(pkgsri.check(pkgJson, sri), false, 'no match after pkgJson change')
+  t.done()
+})