import { parseDiffOutput, countDiffStats } from '../../src/utils/git-utils';

describe('parseDiffOutput', () => {
  it('should parse empty diff', () => {
    const result = parseDiffOutput('');
    expect(result).toEqual([]);
  });

  it('should parse diff with one file', () => {
    const diff = `diff --git a/test.ts b/test.ts
index 1234567..2345678 100644
--- a/test.ts
+++ b/test.ts
@@ -1,3 +1,3 @@
-const a = 1;
+const a = 2;
 const b = 3;
`;
    const result = parseDiffOutput(diff);
    expect(result.length).toBe(1);
    expect(result[0].file).toBe('test.ts');
  });

  it('should parse diff with multiple files', () => {
    const diff = `diff --git a/test.ts b/test.ts
index 1234567..2345678 100644
--- a/test.ts
+++ b/test.ts
@@ -1,3 +1,3 @@
-const a = 1;
+const a = 2;
const b = 3;
diff --git a/other.ts b/other.ts
index 1234567..2345678 100644
--- a/other.ts
+++ b/other.ts
@@ -1,2 +1,2 @@
-const x = 1;
+const x = 2;
`;
    const result = parseDiffOutput(diff);
    expect(result.length).toBe(2);
  });
});

describe('countDiffStats', () => {
  it('should count additions and deletions', () => {
    const diff = `diff --git a/test.ts b/test.ts
+const a = 1;
-const b = 2;
+const c = 3;
`;
    const result = countDiffStats(diff);
    expect(result.additions).toBe(2);
    expect(result.deletions).toBe(1);
  });

  it('should handle empty diff', () => {
    const result = countDiffStats('');
    expect(result.additions).toBe(0);
    expect(result.deletions).toBe(0);
  });
});