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Test that we can decrypt history messages #1933

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@lawrence-forooghian lawrence-forooghian commented Dec 5, 2024

Note: This PR is based on top of #1935; please review that one first.

This was previously untested.

The new test in crypto.test.js is taken from a test Simon added in #1923, but I wanted to separate this test from all the other work that’s being done in that PR. I’ve also copied this new test to create a similar test for the modular variant of the library.

Summary by CodeRabbit

  • New Features

    • Introduced a new asynchronous method for waiting on conditions in tests, enhancing testing capabilities.
    • Added functionality to verify the decryption of messages from encrypted channel history.
  • Tests

    • Expanded test coverage with new cases for checking encrypted message retrieval and history validation.

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📥 Commits

Reviewing files that changed from the base of the PR and between e64820d and 9b6a416.

📒 Files selected for processing (3)
  • test/browser/modular.test.js (2 hunks)
  • test/common/modules/shared_helper.js (1 hunks)
  • test/realtime/crypto.test.js (1 hunks)

Walkthrough

The pull request introduces new functionalities to the testing framework for encrypted messages. It adds an asynchronous function testIsAbleToDecryptHistoryMessages to verify the decryption of history messages in the Crypto section of the test suite. A new method waitFor is also introduced in the SharedHelper class to facilitate waiting for asynchronous conditions. Additionally, a test case for checking encrypted message history is added to the crypto.test.js file, ensuring that published messages can be retrieved correctly from a channel's history.

Changes

File Change Summary
test/browser/modular.test.js Added async function testIsAbleToDecryptHistoryMessages(helper, clientClassConfig) in Crypto section.
test/common/modules/shared_helper.js Introduced async waitFor(condition, remaining) method in SharedHelper class.
test/realtime/crypto.test.js Added new test case it('encrypted history', async function () {...}) to verify encrypted message retrieval.

Possibly related PRs

Poem

🐰 In the land of code where rabbits play,
New tests were added, hip-hip-hooray!
With messages encrypted, we hop and cheer,
For history's secrets are now crystal clear.
So let’s celebrate with a joyful thump,
For every new function makes our hearts jump! 🎉


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Actionable comments posted: 1

🧹 Outside diff range and nitpick comments (2)
test/common/modules/shared_helper.js (1)

486-494: Consider enhancing the waitFor helper with additional error handling and configuration options.

The implementation could be more robust with the following improvements:

  1. Add parameter validation for condition function and remaining time
  2. Add try-catch around condition function call
  3. Make the delay interval configurable
  4. Add a timeout error message

Consider this enhanced implementation:

-    async waitFor(condition, remaining) {
-      const success = await condition();
-      if (success || remaining <= 0) {
-        return success;
-      }
-      await this.setTimeoutAsync(100);
-      return this.waitFor(condition, remaining - 100);
-    }
+    async waitFor(condition, remaining, options = { interval: 100 }) {
+      if (typeof condition !== 'function') {
+        throw new Error('condition must be a function');
+      }
+      if (remaining < 0) {
+        throw new Error('remaining time must be >= 0');
+      }
+      
+      try {
+        const success = await condition();
+        if (success || remaining <= 0) {
+          return success;
+        }
+      } catch (error) {
+        throw new Error(`Error in condition function: ${error.message}`);
+      }
+      
+      await this.setTimeoutAsync(options.interval);
+      return this.waitFor(condition, remaining - options.interval, options);
+    }
test/realtime/crypto.test.js (1)

776-799: Consider enhancing test coverage and maintainability.

The test could be improved in several ways:

  1. Extract magic number 10_000 to a named constant
  2. Add more assertions to verify encryption-related properties
  3. Consider testing edge cases (empty messages, special characters)

Consider this enhanced implementation:

+    const HISTORY_TIMEOUT = 10_000;
+    const TEST_MESSAGES = [
+      { name: 'event0', data: 'Test message' },
+      { name: 'event1', data: '' },  // empty message
+      { name: 'event2', data: '🔑\n\t' }  // special characters
+    ];
+
     it('encrypted history', async function () {
       if (!Crypto) {
         done(new Error('Encryption not supported'));
         return;
       }
 
       const helper = this.test.helper,
         rest = helper.AblyRest(),
         channelName = 'encrypted_history',
-        messageText = 'Test message';
+        key = await Crypto.generateRandomKey();
 
-      const key = await Crypto.generateRandomKey();
       const channel = rest.channels.get(channelName, { cipher: { key: key } });
-      await channel.publish('event0', messageText);
+      
+      // Publish test messages
+      await Promise.all(TEST_MESSAGES.map(msg => 
+        channel.publish(msg.name, msg.data)
+      ));
+
       let items;
       await helper.waitFor(async () => {
         items = (await channel.history()).items;
-        return items.length > 0;
-      }, 10_000);
-      expect(items[0].data).to.equal(messageText);
+        return items.length === TEST_MESSAGES.length;
+      }, HISTORY_TIMEOUT);
+
+      // Verify all messages
+      items.forEach((item, index) => {
+        const expectedMsg = TEST_MESSAGES[index];
+        expect(item.name).to.equal(expectedMsg.name);
+        expect(item.data).to.equal(expectedMsg.data);
+        expect(item.encoding).to.contain('cipher');  // verify encryption
+      });
     });
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📥 Commits

Reviewing files that changed from the base of the PR and between 416c9b0 and e64820d.

📒 Files selected for processing (3)
  • test/browser/modular.test.js (2 hunks)
  • test/common/modules/shared_helper.js (1 hunks)
  • test/realtime/crypto.test.js (1 hunks)
🔇 Additional comments (1)
test/browser/modular.test.js (1)

559-573: LGTM! Well-structured test configuration.

The test configuration properly handles both BaseRest and BaseRealtime clients with appropriate plugins and settings.

test/browser/modular.test.js Show resolved Hide resolved
@lawrence-forooghian
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Test failures are unrelated to this change; have asked in https://ably-real-time.slack.com/archives/CURL4U2FP/p1733420816469159.

This was previously untested.

The new test in `crypto.test.js` is taken from a test Simon added
in #1923, but I wanted to separate this test from all the other work that’s
being done in that PR. I’ve also copied this new test to create a
similar test for the modular variant of the library.

Co-authored-by: Simon Woolf <[email protected]>
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