1 files changed, 46 insertions, 0 deletions
diff --git a/apps/web/lib/sanitize.test.ts b/apps/web/lib/sanitize.test.ts
index 266b8af..f47db80 100644
--- a/apps/web/lib/sanitize.test.ts
+++ b/apps/web/lib/sanitize.test.ts
@@ -44,4 +44,50 @@ describe("sanitizeEntryContent", () => {
     const input = "<pre><code>const x = 1</code></pre>"
     expect(sanitizeEntryContent(input)).toBe(input)
   })
+
+  it("strips 1x1 tracking pixel images", () => {
+    const input = '<p>content</p><img src="https://tracker.example.com/pixel.gif" width="1" height="1">'
+    expect(sanitizeEntryContent(input)).toBe("<p>content</p>")
+  })
+
+  it("strips images with zero dimensions", () => {
+    const input = '<img src="https://tracker.example.com/pixel.gif" width="0" height="0">'
+    expect(sanitizeEntryContent(input)).toBe("")
+  })
+
+  it("strips images where only width is a tracking dimension", () => {
+    const input = '<img src="https://tracker.example.com/pixel.gif" width="1">'
+    expect(sanitizeEntryContent(input)).toBe("")
+  })
+
+  it("strips images where only height is a tracking dimension", () => {
+    const input = '<img src="https://tracker.example.com/pixel.gif" height="2">'
+    expect(sanitizeEntryContent(input)).toBe("")
+  })
+
+  it("preserves normal-sized images", () => {
+    const input = '<img src="https://example.com/photo.jpg" width="800" height="600">'
+    const result = sanitizeEntryContent(input)
+    expect(result).toContain("src=")
+    expect(result).toContain("width=")
+    expect(result).toContain("height=")
+  })
+
+  it("preserves images without dimension attributes", () => {
+    const input = '<img src="https://example.com/photo.jpg" alt="a photo">'
+    const result = sanitizeEntryContent(input)
+    expect(result).toContain("src=")
+    expect(result).toContain("alt=")
+  })
+
+  it("strips 3x3 tracking pixel at threshold boundary", () => {
+    const input = '<img src="https://tracker.example.com/pixel.gif" width="3" height="3">'
+    expect(sanitizeEntryContent(input)).toBe("")
+  })
+
+  it("preserves images just above tracking pixel threshold", () => {
+    const input = '<img src="https://example.com/icon.png" width="4" height="4">'
+    const result = sanitizeEntryContent(input)
+    expect(result).toContain("src=")
+  })
 })