2 files changed, 175 insertions, 0 deletions
diff --git a/internal/generator/atom/atom_test.go b/internal/generator/atom/atom_test.go
new file mode 100644
index 0000000..bf705c3
--- /dev/null
+++ b/internal/generator/atom/atom_test.go
@@ -0,0 +1,107 @@
+package atom
+
+import (
+	"encoding/xml"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"codeberg.org/snonux/snonux/internal/config"
+	"codeberg.org/snonux/snonux/internal/post"
+)
+
+func TestGenerate_writesAtomXML(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	cfg := &config.Config{
+		OutputDir: dir,
+		BaseURL:   "https://example.test",
+	}
+	posts := []*post.Post{
+		{
+			ID:        "p1",
+			Timestamp: time.Date(2026, 1, 2, 15, 4, 5, 0, time.UTC),
+			Content:   "<p>hello</p>",
+		},
+	}
+
+	if err := Generate(posts, cfg); err != nil {
+		t.Fatalf("Generate: %v", err)
+	}
+
+	data, err := os.ReadFile(filepath.Join(dir, "atom.xml"))
+	if err != nil {
+		t.Fatalf("read atom.xml: %v", err)
+	}
+	s := string(data)
+	if !strings.Contains(s, `xmlns="http://www.w3.org/2005/Atom"`) {
+		t.Fatalf("missing atom xmlns: %s", s)
+	}
+	if !strings.Contains(s, "https://example.test/posts/p1/") {
+		t.Fatalf("missing entry link: %s", s)
+	}
+	if !strings.Contains(s, "hello") || !strings.Contains(s, `type="html"`) {
+		t.Fatalf("missing content: %s", s)
+	}
+}
+
+func TestGenerate_emptyPosts(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	cfg := &config.Config{OutputDir: dir, BaseURL: "https://x.test"}
+
+	if err := Generate(nil, cfg); err != nil {
+		t.Fatalf("Generate: %v", err)
+	}
+
+	data, err := os.ReadFile(filepath.Join(dir, "atom.xml"))
+	if err != nil {
+		t.Fatalf("read: %v", err)
+	}
+	var feed struct {
+		Entries []struct {
+			Title string `xml:"title"`
+		} `xml:"entry"`
+	}
+	if err := xml.Unmarshal(data, &feed); err != nil {
+		t.Fatalf("xml: %v", err)
+	}
+	if len(feed.Entries) != 0 {
+		t.Fatalf("want 0 entries, got %d", len(feed.Entries))
+	}
+}
+
+func TestGenerate_limitPostsPerPage(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	cfg := &config.Config{OutputDir: dir, BaseURL: "https://x.test"}
+
+	var posts []*post.Post
+	for i := 0; i < 50; i++ {
+		posts = append(posts, &post.Post{
+			ID:        "id",
+			Timestamp: time.Date(2026, 1, i+1, 12, 0, 0, 0, time.UTC),
+			Content:   "c",
+		})
+	}
+
+	if err := Generate(posts, cfg); err != nil {
+		t.Fatalf("Generate: %v", err)
+	}
+
+	data, _ := os.ReadFile(filepath.Join(dir, "atom.xml"))
+	var feed struct {
+		Entries []struct{} `xml:"entry"`
+	}
+	if err := xml.Unmarshal(data, &feed); err != nil {
+		t.Fatalf("xml: %v", err)
+	}
+	if len(feed.Entries) != config.PostsPerPage {
+		t.Fatalf("want %d entries, got %d", config.PostsPerPage, len(feed.Entries))
+	}
+}
diff --git a/internal/generator/generator_test.go b/internal/generator/generator_test.go
index 0960d87..9eafb14 100644
--- a/internal/generator/generator_test.go
+++ b/internal/generator/generator_test.go
@@ -2,9 +2,12 @@ package generator
 
 import (
 	"html/template"
+	"os"
+	"path/filepath"
 	"testing"
 	"time"
 
+	"codeberg.org/snonux/snonux/internal/config"
 	"codeberg.org/snonux/snonux/internal/post"
 )
 
@@ -197,3 +200,68 @@ func TestBuildPageData_navLinks(t *testing.T) {
 		})
 	}
 }
+
+func TestGetTheme_unknownFallsBackToNeon(t *testing.T) {
+	t.Parallel()
+	if got, want := getTheme("no-such-theme-"), getTheme("neon"); got != want {
+		t.Fatal("expected neon fallback")
+	}
+}
+
+func TestListThemes_sortedAndComplete(t *testing.T) {
+	t.Parallel()
+	names := ListThemes()
+	if len(names) != len(themeRegistry) {
+		t.Fatalf("len=%d, want %d", len(names), len(themeRegistry))
+	}
+	for i := 1; i < len(names); i++ {
+		if names[i] <= names[i-1] {
+			t.Fatalf("not strictly sorted: %v", names)
+		}
+	}
+}
+
+func TestLoadAllPosts_missingPostsDir(t *testing.T) {
+	t.Parallel()
+	posts, err := loadAllPosts(t.TempDir())
+	if err != nil {
+		t.Fatalf("err: %v", err)
+	}
+	if posts != nil {
+		t.Fatalf("want nil slice, got %v", posts)
+	}
+}
+
+func TestRun_writesPagesAndAtom(t *testing.T) {
+	t.Parallel()
+
+	out := t.TempDir()
+	postDir := filepath.Join(out, "posts", "a1")
+	if err := os.MkdirAll(postDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	p := &post.Post{
+		ID:        "a1",
+		Timestamp: time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC),
+		PostType:  post.TypeText,
+		Content:   "<p>hello</p>",
+	}
+	if err := p.Save(postDir); err != nil {
+		t.Fatal(err)
+	}
+
+	cfg := &config.Config{
+		OutputDir: out,
+		BaseURL:   "https://example.test",
+		Theme:     "neon",
+	}
+	if err := Run(cfg); err != nil {
+		t.Fatalf("Run: %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(out, "index.html")); err != nil {
+		t.Fatalf("index.html: %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(out, "atom.xml")); err != nil {
+		t.Fatalf("atom.xml: %v", err)
+	}
+}