package gitcmd

import (
	"testing"
)

func TestListCommitsByPath_ModifiedFile(t *testing.T) {

	f := newFixture(t)
	cs, err := f.repo.ListCommitsByPath("HEAD", "README.md", 0)
	if err != nil {
		t.Fatal(err)
	}
	if len(cs) != 2 {
		t.Fatalf("commits = %d, want 2: %+v", len(cs), cs)
	}
	if cs[0].ID != f.c3 || cs[1].ID != f.c1 {
		t.Errorf("order = %s, %s; want c3, c1", cs[0].ID, cs[1].ID)
	}
}

func TestListCommitsByPath_OnceAddedFile(t *testing.T) {
	f := newFixture(t)
	cs, err := f.repo.ListCommitsByPath("HEAD", "src/main.txt", 0)
	if err != nil {
		t.Fatal(err)
	}
	if len(cs) != 1 || cs[0].ID != f.c2 {
		t.Errorf("commits = %+v, want [c2]", cs)
	}
}

func TestListCommitsByPath_DeletedFileIncludesDelete(t *testing.T) {

	f := newFixture(t)
	cs, err := f.repo.ListCommitsByPath("HEAD", "deleted.txt", 0)
	if err != nil {
		t.Fatal(err)
	}
	if len(cs) != 2 {
		t.Fatalf("commits = %d, want 2: %+v", len(cs), cs)
	}
	if cs[0].ID != f.c5 || cs[1].ID != f.c2 {
		t.Errorf("order = %s, %s; want c5, c2", cs[0].ID, cs[1].ID)
	}
}

func TestListCommitsByPath_Limit(t *testing.T) {
	f := newFixture(t)
	cs, err := f.repo.ListCommitsByPath("HEAD", "README.md", 1)
	if err != nil {
		t.Fatal(err)
	}
	if len(cs) != 1 || cs[0].ID != f.c3 {
		t.Errorf("commits = %+v, want [c3] (limit 1, newest)", cs)
	}
}

func TestListCommitsByPath_MissingPath(t *testing.T) {

	f := newFixture(t)
	cs, err := f.repo.ListCommitsByPath("HEAD", "no/such/file.txt", 0)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(cs) != 0 {
		t.Errorf("commits = %+v, want empty for missing path", cs)
	}
}