From e7df17e50a8f1c5b004bbe625cdecb68cf7da9ee Mon Sep 17 00:00:00 2001
From: imrishabh18 <belikerishabh@gmail.com>
Date: Sat, 30 May 2026 03:23:29 +0530
Subject: [PATCH] Add repro120, the footprint should be on the bottom layer

---
 ...pro120-footprint-layer-change-pcb.snap.svg |  1 +
 .../repro120-footprint-layer-change.test.tsx  | 54 +++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 tests/repros/__snapshots__/repro120-footprint-layer-change-pcb.snap.svg
 create mode 100644 tests/repros/repro120-footprint-layer-change.test.tsx

diff --git a/tests/repros/__snapshots__/repro120-footprint-layer-change-pcb.snap.svg b/tests/repros/__snapshots__/repro120-footprint-layer-change-pcb.snap.svg
new file mode 100644
index 000000000..42229f3cc
--- /dev/null
+++ b/tests/repros/__snapshots__/repro120-footprint-layer-change-pcb.snap.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="800" height="600" data-software-used-string="@tscircuit/core@0.0.1277"><style></style><rect class="boundary" x="0" y="0" fill="#000" width="800" height="600" data-type="pcb_background" data-pcb-layer="global"/><rect class="pcb-boundary" fill="none" stroke="#fff" stroke-width="0.3" x="121.33757961783436" y="31.847133757961785" width="557.3248407643314" height="536.3057324840765" data-type="pcb_boundary" data-pcb-layer="global"/><path class="pcb-board" d="M 161.1464968152866 538.8535031847134 L 638.8535031847134 538.8535031847134 L 638.8535031847134 61.14649681528661 L 161.1464968152866 61.14649681528661 Z" fill="none" stroke="rgba(255, 255, 255, 0.5)" stroke-width="3.1847133757961785" data-type="pcb_board" data-pcb-layer="board"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="602.2292993630573" y="31.847133757961757" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="602.2292993630573" y="112.73885350318471" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="602.2292993630573" y="193.63057324840764" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="602.2292993630573" y="274.5222929936306" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="602.2292993630573" y="355.4140127388535" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="602.2292993630573" y="436.30573248407643" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="602.2292993630573" y="517.1974522292994" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="121.3375796178344" y="517.1974522292994" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="121.3375796178344" y="436.30573248407643" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="121.3375796178344" y="355.4140127388535" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="121.3375796178344" y="274.5222929936306" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="121.3375796178344" y="193.63057324840764" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="121.3375796178344" y="112.73885350318474" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/><rect class="pcb-pad" fill="rgb(200, 52, 52)" x="121.3375796178344" y="31.847133757961757" width="76.43312101910828" height="50.955414012738856" data-type="pcb_smtpad" data-pcb-layer="top"/></svg>
\ No newline at end of file
diff --git a/tests/repros/repro120-footprint-layer-change.test.tsx b/tests/repros/repro120-footprint-layer-change.test.tsx
new file mode 100644
index 000000000..284b44011
--- /dev/null
+++ b/tests/repros/repro120-footprint-layer-change.test.tsx
@@ -0,0 +1,54 @@
+import { expect, test } from "bun:test"
+import { getTestFixture } from "tests/fixtures/get-test-fixture"
+import { Fragment } from "react"
+
+const xiaoBottomFootprint = (
+  <footprint>
+    {Array.from({ length: 7 }, (_, i) => (
+      <Fragment key={`xiao-left-${i + 1}`}>
+        <smtpad
+          portHints={[`pin${i + 1}`]}
+          layer="bottom"
+          shape="rect"
+          pcbX="-7.55mm"
+          pcbY={`${7.62 - i * 2.54}mm`}
+          width="2.4mm"
+          height="1.6mm"
+        />
+      </Fragment>
+    ))}
+    {Array.from({ length: 7 }, (_, i) => (
+      <Fragment key={`xiao-right-${i + 8}`}>
+        <smtpad
+          portHints={[`pin${i + 8}`]}
+          layer="bottom"
+          shape="rect"
+          pcbX="7.55mm"
+          pcbY={`${-7.62 + i * 2.54}mm`}
+          width="2.4mm"
+          height="1.6mm"
+        />
+      </Fragment>
+    ))}
+  </footprint>
+)
+
+test("repro-120: footprint layer should be bottom when component layer is bottom", async () => {
+  const { circuit } = getTestFixture()
+
+  circuit.add(
+    <board width="15mm" height="15mm">
+      <chip
+        name="U1"
+        layer="bottom"
+        footprint={xiaoBottomFootprint}
+        pcbX={0}
+        pcbY={0}
+      />
+    </board>,
+  )
+
+  await circuit.renderUntilSettled()
+
+  expect(circuit).toMatchPcbSnapshot(import.meta.path)
+})