1 files changed, 75 insertions, 0 deletions
diff --git a/packages/server/src/helpers/iso/isoCrypto/getWebCrypto.test.ts b/packages/server/src/helpers/iso/isoCrypto/getWebCrypto.test.ts
new file mode 100644
index 0000000..c372559
--- /dev/null
+++ b/packages/server/src/helpers/iso/isoCrypto/getWebCrypto.test.ts
@@ -0,0 +1,75 @@
+import { assertEquals } from 'https://deno.land/std@0.198.0/assert/mod.ts';
+import { returnsNext, stub } from 'https://deno.land/std@0.198.0/testing/mock.ts';
+
+import { _getWebCryptoInternals, getWebCrypto } from './getWebCrypto.ts';
+
+Deno.test('Should return globalThis.crypto when present', async () => {
+  // Back up globalThis.crypto
+  const originalCrypto = globalThis.crypto;
+
+  // Overwrite globalThis.crypto
+  const newCrypto = {};
+  Object.defineProperty(globalThis, 'crypto', { value: newCrypto, writable: true });
+
+  const returnedCrypto = await getWebCrypto();
+
+  assertEquals(returnedCrypto, newCrypto);
+
+  // Restore globalThis.crypto
+  Object.defineProperty(globalThis, 'crypto', { value: originalCrypto, writable: true });
+});
+
+Deno.test('Should return node:crypto.webcrypto when globalThis.crypto is missing', async () => {
+  // Mock out just enough of the 'node:crypto' module
+  const fakeNodeCrypto = { webcrypto: {} };
+  const mockDecodeClientData = stub(
+    _getWebCryptoInternals,
+    'stubThisImportNodeCrypto',
+    // @ts-ignore: Pretending to return something from Node
+    returnsNext([fakeNodeCrypto]),
+  );
+
+  // Back up globalThis.crypto
+  const originalCrypto = globalThis.crypto;
+
+  // Overwrite globalThis.crypto
+  const newCrypto = undefined;
+  Object.defineProperty(globalThis, 'crypto', { value: newCrypto, writable: true });
+
+  const returnedCrypto = await getWebCrypto();
+
+  assertEquals(returnedCrypto, fakeNodeCrypto.webcrypto);
+
+  // Restore globalThis.crypto
+  Object.defineProperty(globalThis, 'crypto', { value: originalCrypto, writable: true });
+  mockDecodeClientData.restore();
+});
+
+Deno.test(
+  'Should return globalThis.crypto when present, while node:crypto is present but missing webcrypto',
+  async () => {
+    // Mock out just enough of the 'node:crypto' module, but like we're in Node v14
+    const fakeNodeCrypto = { webcrypto: undefined };
+    const mockDecodeClientData = stub(
+      _getWebCryptoInternals,
+      'stubThisImportNodeCrypto',
+      // @ts-ignore: Pretending to return something from Node
+      returnsNext([fakeNodeCrypto]),
+    );
+
+    // Back up globalThis.crypto
+    const originalCrypto = globalThis.crypto;
+
+    // Overwrite globalThis.crypto
+    const fakeGlobalCrypto = {};
+    Object.defineProperty(globalThis, 'crypto', { value: fakeGlobalCrypto, writable: true });
+
+    const returnedCrypto = await getWebCrypto();
+
+    assertEquals(returnedCrypto, fakeGlobalCrypto);
+
+    // Restore globalThis.crypto
+    Object.defineProperty(globalThis, 'crypto', { value: originalCrypto, writable: true });
+    mockDecodeClientData.restore();
+  },
+);