1 files changed, 149 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..26025b8
--- /dev/null
+++ b/packages/server/src/helpers/iso/isoCrypto/getWebCrypto.test.ts
@@ -0,0 +1,149 @@
+import { assertEquals, assertRejects } 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, MissingWebCrypto } from './getWebCrypto.ts';
+
+Deno.test('should return globalThis.crypto when present', async () => {
+  // Clear whatever version of crypto might have been set
+  _getWebCryptoInternals.setCachedCrypto(undefined);
+
+  // Pretend globalThis.crypto exists
+  const newGlobalThisCrypto = {};
+  const mockGlobalThisCrypto = stub(
+    _getWebCryptoInternals,
+    'stubThisGlobalThisCrypto',
+    // @ts-ignore: globalThis.crypto
+    returnsNext([newGlobalThisCrypto]),
+  );
+
+  const returnedCrypto = await getWebCrypto();
+
+  assertEquals(returnedCrypto, newGlobalThisCrypto);
+
+  mockGlobalThisCrypto.restore();
+});
+
+Deno.test('should return node:crypto.webcrypto when globalThis.crypto is missing', async () => {
+  // Clear whatever version of crypto might have been set
+  _getWebCryptoInternals.setCachedCrypto(undefined);
+
+  // Pretend globalThis.crypto doesn't exist
+  const mockGlobalThisCrypto = stub(
+    _getWebCryptoInternals,
+    'stubThisGlobalThisCrypto',
+    // @ts-ignore: globalThis.crypto
+    returnsNext([undefined]),
+  );
+
+  // Mock out just enough of the 'node:crypto' module
+  const fakeNodeCrypto = { webcrypto: {} };
+  const mockImportNodeCrypto = stub(
+    _getWebCryptoInternals,
+    'stubThisImportNodeCrypto',
+    // @ts-ignore: node:crypto
+    returnsNext([fakeNodeCrypto]),
+  );
+
+  const returnedCrypto = await getWebCrypto();
+
+  assertEquals(returnedCrypto, fakeNodeCrypto.webcrypto);
+
+  mockGlobalThisCrypto.restore();
+  mockImportNodeCrypto.restore();
+});
+
+Deno.test(
+  'should return globalThis.crypto when present, while node:crypto.webcrypto is present',
+  async () => {
+    // Clear whatever version of crypto might have been set
+    _getWebCryptoInternals.setCachedCrypto(undefined);
+
+    // Pretend globalThis.crypto exists
+    const fakeGlobalThisCrypto = {};
+    const mockGlobalThisCrypto = stub(
+      _getWebCryptoInternals,
+      'stubThisGlobalThisCrypto',
+      // @ts-ignore: globalThis.crypto
+      returnsNext([fakeGlobalThisCrypto]),
+    );
+
+    // Mock out just enough of the 'node:crypto' module, but like we're in Node v14
+    const fakeNodeCrypto = { webcrypto: {} };
+    const mockImportNodeCrypto = stub(
+      _getWebCryptoInternals,
+      'stubThisImportNodeCrypto',
+      // @ts-ignore: node:crypto
+      returnsNext([fakeNodeCrypto]),
+    );
+
+    const returnedCrypto = await getWebCrypto();
+
+    assertEquals(returnedCrypto, fakeGlobalThisCrypto);
+
+    mockGlobalThisCrypto.restore();
+    mockImportNodeCrypto.restore();
+  },
+);
+
+Deno.test(
+  'should return globalThis.crypto when present, while node:crypto is present but missing webcrypto',
+  async () => {
+    // Clear whatever version of crypto might have been set
+    _getWebCryptoInternals.setCachedCrypto(undefined);
+
+    // Pretend globalThis.crypto exists
+    const fakeGlobalThisCrypto = {};
+    const mockGlobalThisCrypto = stub(
+      _getWebCryptoInternals,
+      'stubThisGlobalThisCrypto',
+      // @ts-ignore: globalThis.crypto
+      returnsNext([fakeGlobalThisCrypto]),
+    );
+
+    // Mock out just enough of the 'node:crypto' module, but like we're in Node v14
+    const fakeNodeCrypto = { webcrypto: undefined };
+    const mockImportNodeCrypto = stub(
+      _getWebCryptoInternals,
+      'stubThisImportNodeCrypto',
+      // @ts-ignore: node:crypto
+      returnsNext([fakeNodeCrypto]),
+    );
+
+    const returnedCrypto = await getWebCrypto();
+
+    assertEquals(returnedCrypto, fakeGlobalThisCrypto);
+
+    mockGlobalThisCrypto.restore();
+    mockImportNodeCrypto.restore();
+  },
+);
+
+Deno.test('should raise MissingWebCrypto error when nothing is available', async () => {
+  // Clear whatever version of crypto might have been set
+  _getWebCryptoInternals.setCachedCrypto(undefined);
+
+  // Pretend globalThis.crypto doesn't exist
+  const mockGlobalThisCrypto = stub(
+    _getWebCryptoInternals,
+    'stubThisGlobalThisCrypto',
+    // @ts-ignore: globalThis.crypto
+    returnsNext([undefined]),
+  );
+
+  // Pretend node:crypto doesn't exist
+  const mockImportNodeCrypto = stub(
+    _getWebCryptoInternals,
+    'stubThisImportNodeCrypto',
+    // @ts-ignore: node:crypto
+    returnsNext([undefined]),
+  );
+
+  await assertRejects(
+    () => getWebCrypto(),
+    MissingWebCrypto,
+    'Crypto API could not be located',
+  );
+
+  mockGlobalThisCrypto.restore();
+  mockImportNodeCrypto.restore();
+});