tree schema BUGFIX loading includes with revisions

Fixes #2467

Author: michalvasko

src/tree_schema_common.c

@@ -1228,8 +1228,8 @@ lysp_load_submodules(struct lysp_ctx *pctx, struct lysp_module *pmod, struct ly_
                 submod_included = 0;
             } else if (r) {
                 return r;
-            } else if (inc->submodule->latest_revision == 2) {
-                /* submodule found and is the latest existing revision */
+            } else if (inc->rev[0] || (inc->submodule->latest_revision == 2)) {
+                /* submodule found and is the specific requested revision/latest existing revision */
                 continue;
             }
         }

tests/modules/yang/b.yang

@@ -0,0 +1,14 @@
+module b { 
+  namespace "urn:b";
+  prefix "b";
+
+  include d {
+    revision-date "2026-01-09";
+  }
+  include c {
+    revision-date "2026-01-09";
+  }
+  revision 2026-01-09 {
+    description "example";
+  }
+}

tests/modules/yang/c.yang

@@ -0,0 +1,12 @@
+submodule c {
+  belongs-to b {
+    prefix b;
+  }
+  include d {
+    revision-date "2026-01-09";
+  }
+
+  revision 2026-01-09 {
+    description "example";
+  }
+}

tests/modules/yang/d.yang

@@ -0,0 +1,9 @@
+submodule d {
+  belongs-to b {
+    prefix b;
+  }
+
+  revision 2026-01-09 {
+    description "example";
+  }
+}

tests/utests/basic/test_context.c

@@ -464,6 +464,20 @@ test_imports(void **state)
     ly_err_clean(UTEST_LYCTX, NULL);
 }
 
+static void
+test_includes(void **state)
+{
+    struct lys_module *mod;
+
+    ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_DIR_MODULES_YANG);
+
+    /* load b with c and d submodules */
+    mod = ly_ctx_load_module(UTEST_LYCTX, "b", NULL, NULL);
+    assert_non_null(mod);
+
+    ly_ctx_unset_searchdir(UTEST_LYCTX, TESTS_DIR_MODULES_YANG);
+}
+
 static void
 test_get_models(void **state)
 {
@@ -1119,6 +1133,7 @@ main(void)
         UTEST(test_options),
         UTEST(test_models),
         UTEST(test_imports),
+        UTEST(test_includes),
         UTEST(test_get_models),
         UTEST(test_ylmem),
         UTEST(test_set_priv_parsed),