improving similarity cache

test/similarity/similarity.test.js

@@ -1,30 +0,0 @@
-import { expect } from 'chai';
-import * as similarityCache from '../../lib/services/similarity-check/similarityCache.js';
-
-describe('similarityCheck', () => {
-  it('should return true on duplicate', () => {
-    similarityCache.addCacheEntry('Hello World', 'Test');
-    expect(similarityCache.hasSimilarEntries('Hello World', 'Test')).to.be.true;
-  });
-
-  it('should return true even if one value is null', () => {
-    similarityCache.addCacheEntry('Hello World', null);
-    expect(similarityCache.hasSimilarEntries('Hello World', null)).to.be.true;
-  });
-
-  it('should return true even if one value is an obj', () => {
-    similarityCache.addCacheEntry('Hello World', [{ TR: 'OLOLO' }]);
-    expect(similarityCache.hasSimilarEntries('Hello World', [{ TR: 'OLOLO' }])).to.be.true;
-  });
-
-  it('should return false when no duplicate', () => {
-    similarityCache.addCacheEntry('Hello World__', 'Test');
-    expect(similarityCache.hasSimilarEntries('Hello World___', 'Test')).to.be.false;
-  });
-
-  it('should return false when no duplicate', () => {
-    expect(similarityCache.hasSimilarEntries('Hello World', 'Test')).to.be.true;
-    similarityCache.invalidateAllForTest();
-    expect(similarityCache.hasSimilarEntries('Hello World', 'Test')).to.be.false;
-  });
-});

test/similarity/similarityCache.test.js

@@ -0,0 +1,62 @@
+import { expect } from 'chai';
+import esmock from 'esmock';
+
+// Helper to create module under test with mocks
+async function loadModuleWith({ entries = [] } = {}) {
+  const mod = await esmock('../../lib/services/similarity-check/similarityCache.js', {
+    // Mock the storage to return our controlled entries
+    '../../lib/services/storage/listingsStorage.js': {
+      getAllEntriesFromListings: () => entries,
+    },
+  });
+  return mod;
+}
+
+describe('similarityCache', () => {
+  it('initSimilarityCache builds cache from storage and enables duplicate detection', async () => {
+    const entries = [
+      { title: 'A', price: 1000, address: 'Main 1' },
+      { title: 'B', price: 0, address: 'Zero St' },
+    ];
+
+    const { initSimilarityCache, checkAndAddEntry } = await loadModuleWith({ entries });
+
+    // Initially, duplicates should not be detected for new data
+    expect(checkAndAddEntry({ title: 'X', price: 200, address: 'Y' })).to.equal(false);
+
+    // Now initialize from storage
+    initSimilarityCache();
+
+    // Exact duplicates should be detected
+    expect(checkAndAddEntry({ title: 'A', price: 1000, address: 'Main 1' })).to.equal(true);
+    // Ensure falsy-but-valid price 0 is preserved by hashing and detected as duplicate
+    expect(checkAndAddEntry({ title: 'B', price: 0, address: 'Zero St' })).to.equal(true);
+  });
+
+  it('checkAndAddEntry returns false for new entry then true for duplicate on second call', async () => {
+    const { checkAndAddEntry } = await loadModuleWith();
+
+    const first = checkAndAddEntry({ title: 'C', price: 300, address: 'Road 3' });
+    const second = checkAndAddEntry({ title: 'C', price: 300, address: 'Road 3' });
+
+    expect(first).to.equal(false);
+    expect(second).to.equal(true);
+  });
+
+  it('hashing ignores null/undefined but preserves 0 via behavior', async () => {
+    const { checkAndAddEntry } = await loadModuleWith();
+
+    // Add baseline (null address ignored)
+    const add1 = checkAndAddEntry({ title: 'T', price: 1, address: null });
+    expect(add1).to.equal(false);
+    // Duplicate with undefined address should match
+    const dup = checkAndAddEntry({ title: 'T', price: 1, address: undefined });
+    expect(dup).to.equal(true);
+
+    // Now test that price 0 is preserved (not filtered out)
+    const addZero = checkAndAddEntry({ title: 'Z', price: 0, address: 'Zero' });
+    expect(addZero).to.equal(false);
+    const dupZero = checkAndAddEntry({ title: 'Z', price: 0, address: 'Zero' });
+    expect(dupZero).to.equal(true);
+  });
+});