From 976ea003de38130434ece50283ad5bb3cf790131 Mon Sep 17 00:00:00 2001
From: Le Vivilet <levivilet@pm.me>
Date: Wed, 22 Apr 2026 23:02:02 +0200
Subject: [PATCH] test: add end-to-end test for diffing complex C files with
 updated SensorFrame structure

---
 packages/e2e/src/diff.c-complex-refactor.ts | 126 ++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 packages/e2e/src/diff.c-complex-refactor.ts

diff --git a/packages/e2e/src/diff.c-complex-refactor.ts b/packages/e2e/src/diff.c-complex-refactor.ts
new file mode 100644
index 0000000..94f3967
--- /dev/null
+++ b/packages/e2e/src/diff.c-complex-refactor.ts
@@ -0,0 +1,126 @@
+import type { Test } from '@lvce-editor/test-with-playwright'
+
+export const name = 'diff.c-complex-refactor'
+
+export const skip = 1
+
+export const test: Test = async ({ DiffView, expect, FileSystem, Locator, Workspace }) => {
+  const tmpDir = await FileSystem.getTmpDir()
+  await FileSystem.writeFile(
+    `${tmpDir}/before.c`,
+    `#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+typedef struct {
+    uint32_t id;
+    uint16_t samples[4];
+    size_t sample_count;
+} SensorFrame;
+
+static void clear_frame(SensorFrame *frame) {
+    memset(frame, 0, sizeof(*frame));
+}
+
+static int load_frame(SensorFrame *frame, const uint16_t *input, size_t count) {
+    clear_frame(frame);
+    frame->id = 7;
+
+    for (size_t index = 0; index < count && index < 4; index++) {
+        frame->samples[index] = input[index];
+        frame->sample_count++;
+    }
+
+    return frame->sample_count > 0;
+}
+
+static void print_frame(const SensorFrame *frame) {
+    printf("frame=%u samples=%zu\\n", frame->id, frame->sample_count);
+}
+
+int main(void) {
+    uint16_t input[] = { 4, 8, 15, 16 };
+    SensorFrame frame;
+
+    if (!load_frame(&frame, input, 4)) {
+        return 1;
+    }
+
+    print_frame(&frame);
+    return 0;
+}
+`,
+  )
+  await FileSystem.writeFile(
+    `${tmpDir}/after.c`,
+    `#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+typedef struct {
+    uint32_t id;
+    uint16_t samples[8];
+    size_t sample_count;
+    bool truncated;
+} SensorFrame;
+
+static void reset_frame(SensorFrame *frame, uint32_t id) {
+    memset(frame, 0, sizeof(*frame));
+    frame->id = id;
+}
+
+static int load_frame(SensorFrame *frame, const uint16_t *input, size_t count, bool dedupe) {
+    reset_frame(frame, 17);
+
+    for (size_t index = 0; index < count; index++) {
+        if (dedupe && frame->sample_count > 0 && frame->samples[frame->sample_count - 1] == input[index]) {
+            continue;
+        }
+        if (frame->sample_count == 8) {
+            frame->truncated = true;
+            break;
+        }
+
+        frame->samples[frame->sample_count] = input[index] * 2;
+        frame->sample_count++;
+    }
+
+    return !frame->truncated && frame->sample_count >= 3;
+}
+
+static void print_frame(const SensorFrame *frame) {
+    printf("frame=%u samples=%zu truncated=%d\\n", frame->id, frame->sample_count, frame->truncated);
+}
+
+int main(void) {
+    uint16_t input[] = { 4, 4, 8, 15, 16, 23, 42 };
+    SensorFrame frame;
+
+    if (!load_frame(&frame, input, 7, true)) {
+        return 1;
+    }
+
+    print_frame(&frame);
+    return frame.truncated ? 2 : 0;
+}
+`,
+  )
+  await Workspace.setPath(tmpDir)
+
+  await DiffView.open(`${tmpDir}/before.c`, `${tmpDir}/after.c`)
+
+  const beforePane = Locator('.DiffEditorContentLeft .DiffEditorRows')
+  const afterPane = Locator('.DiffEditorContentRight .DiffEditorRows')
+  const deletedRows = Locator('.DiffEditorContentLeft .EditorRow.Deletion')
+  const insertedRows = Locator('.DiffEditorContentRight .EditorRow.Insertion')
+
+  await expect(beforePane).toContainText('uint16_t samples[4];')
+  await expect(beforePane).toContainText('static void clear_frame(SensorFrame *frame) {')
+  await expect(beforePane).toContainText('frame->id = 7;')
+  await expect(afterPane).toContainText('#include <stdbool.h>')
+  await expect(afterPane).toContainText('bool truncated;')
+  await expect(afterPane).toContainText('static void reset_frame(SensorFrame *frame, uint32_t id) {')
+  await expect(deletedRows).toHaveCount(10)
+  await expect(insertedRows).toHaveCount(20)
+}