TUI conversion

app_apply_test.go

@@ -0,0 +1,126 @@
+package main
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestApplyChangesRewritesMetadata(t *testing.T) {
+	repo := t.TempDir()
+
+	run := func(args ...string) string {
+		t.Helper()
+		cmd := exec.Command("git", append([]string{"-C", repo}, args...)...)
+		out, err := cmd.CombinedOutput()
+		if err != nil {
+			t.Fatalf("git %v failed: %v\n%s", args, err, string(out))
+		}
+		return string(out)
+	}
+
+	run("init")
+	run("config", "user.name", "Original User")
+	run("config", "user.email", "original@example.com")
+
+	if err := os.WriteFile(filepath.Join(repo, "a.txt"), []byte("one\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	run("add", "a.txt")
+	run("commit", "-m", "first")
+
+	if err := os.WriteFile(filepath.Join(repo, "a.txt"), []byte("two\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	run("add", "a.txt")
+	run("commit", "-m", "second")
+
+	app := NewApp()
+	if _, err := app.SetRepository(repo); err != nil {
+		t.Fatal(err)
+	}
+
+	history, err := app.LoadHistory()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(history) < 2 {
+		t.Fatalf("expected at least 2 commits, got %d", len(history))
+	}
+
+	first := history[0]
+	first.AuthorName = "Edited Author"
+	first.Message = "edited first message"
+
+	req := ApplyRequest{
+		Commits:   history,
+		ForcePush: false,
+		PushTags:  false,
+	}
+	req.Commits[0] = first
+
+	result, err := app.ApplyChanges(req)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if result.RewrittenCommits == 0 {
+		t.Fatalf("expected rewritten commits > 0, got %d", result.RewrittenCommits)
+	}
+
+	out := run("log", "--reverse", "--pretty=format:%an%x1f%B%x1e")
+	if !strings.Contains(out, "Edited Author") {
+		t.Fatalf("expected rewritten author in log, got: %s", out)
+	}
+	if !strings.Contains(out, "edited first message") {
+		t.Fatalf("expected rewritten message in log, got: %s", out)
+	}
+}
+
+func TestRewriteHistoryFailsWhenNoRefsAreRewritten(t *testing.T) {
+	repo := t.TempDir()
+
+	run := func(args ...string) string {
+		t.Helper()
+		cmd := exec.Command("git", append([]string{"-C", repo}, args...)...)
+		out, err := cmd.CombinedOutput()
+		if err != nil {
+			t.Fatalf("git %v failed: %v\n%s", args, err, string(out))
+		}
+		return string(out)
+	}
+
+	run("init")
+	run("config", "user.name", "Original User")
+	run("config", "user.email", "original@example.com")
+
+	if err := os.WriteFile(filepath.Join(repo, "a.txt"), []byte("one\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	run("add", "a.txt")
+	run("commit", "-m", "first")
+
+	app := NewApp()
+	if _, err := app.SetRepository(repo); err != nil {
+		t.Fatal(err)
+	}
+	history, err := app.LoadHistory()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(history) != 1 {
+		t.Fatalf("expected one commit, got %d", len(history))
+	}
+
+	unchanged := history[0]
+	err = rewriteHistory(repo, map[string]CommitRecord{
+		unchanged.Hash: unchanged,
+	}, map[string]bool{})
+	if err == nil {
+		t.Fatal("expected rewriteHistory to fail when git reports unchanged refs")
+	}
+	if !strings.Contains(err.Error(), "did not rewrite any refs") {
+		t.Fatalf("unexpected error: %v", err)
+	}
+}