From 9d45685a5a73dc93ad995292cfbdca9a3b3e1a9a Mon Sep 17 00:00:00 2001
From: Steve King <steve@mydev.co>
Date: Tue, 31 Dec 2024 16:33:41 +0200
Subject: [PATCH] Testing `git.diffSummary` from empty tree to first commit

Relates to #1035
---
 .../test/integration/diff-summary.spec.ts     | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 simple-git/test/integration/diff-summary.spec.ts

diff --git a/simple-git/test/integration/diff-summary.spec.ts b/simple-git/test/integration/diff-summary.spec.ts
new file mode 100644
index 00000000..bdfff8e4
--- /dev/null
+++ b/simple-git/test/integration/diff-summary.spec.ts
@@ -0,0 +1,30 @@
+import { like, newSimpleGit } from '@simple-git/test-utils';
+
+describe('diffSummary', () => {
+   it('empty tree to first commit', async () => {
+      const git = newSimpleGit();
+      const emptyCommit = '4b825dc642cb6eb9a060e54bf8d69288fbee4904';
+      const firstCommit = await git.firstCommit();
+
+      const task = git.diffSummary([emptyCommit, firstCommit]);
+      const result = await task;
+
+      expect(result.changed).toBeGreaterThan(0);
+      expect(result.changed).toBe(result.files.length);
+      expect(result.insertions).toBeGreaterThan(0);
+      expect(result.deletions).toBe(0);
+      result.files.forEach((file) => {
+         if (file.binary) {
+            throw new Error(`Test assumes no binary files in first commit`);
+         }
+
+         expect(file.insertions).toBe(file.changes);
+         expect(file).toEqual(
+            like({
+               changes: file.insertions,
+               deletions: 0,
+            })
+         );
+      });
+   });
+});