Add xgettext fuzz target

.github/workflows/test.yml

@@ -105,7 +105,13 @@ jobs:
         run: |
           cd i18n-helpers
           cargo fuzz run gettext -- -only_ascii=1 -max_total_time=30
-          cargo fuzz cmin normalize
+          cargo fuzz cmin gettext
+
+      - name: Run xgettext fuzzer and minimize corpus
+        run: |
+          cd i18n-helpers
+          cargo fuzz run xgettext -- -only_ascii=1 -max_total_time=30
+          cargo fuzz cmin xgettext
 
   clippy:
     name: Clippy

i18n-helpers/fuzz/Cargo.toml

@@ -39,3 +39,9 @@ name = "gettext"
 path = "fuzz_targets/gettext.rs"
 test = false
 doc = false
+
+[[bin]]
+name = "xgettext"
+path = "fuzz_targets/xgettext.rs"
+test = false
+doc = false

i18n-helpers/fuzz/fuzz_targets/xgettext.rs

@@ -0,0 +1,20 @@
+#![no_main]
+
+use std::path::PathBuf;
+use std::str::FromStr;
+
+use libfuzzer_sys::fuzz_target;
+use mdbook::renderer::RenderContext;
+use mdbook::Config;
+use mdbook_i18n_helpers::xgettext::create_catalog;
+use mdbook_i18n_helpers_fuzz::{create_book, BookItem};
+
+fuzz_target!(|inputs: (&str, Vec<BookItem>)| {
+    let (summary, book_items) = inputs;
+
+    let book = create_book(book_items);
+
+    let ctx = RenderContext::new(PathBuf::new(), book, Config::from_str("").unwrap(), "");
+
+    let _ = create_catalog(&ctx, |_| Ok(summary.to_string()));
+});