fix(founding-wizard): nested IF-Bloecke korrekt aufloesen (innermost-first)

backend-compliance/tests/test_founding_wizard.py

@@ -68,6 +68,43 @@ class TestTemplateRenderer:
         result = render_template(template, {"A": True, "B": True})
         assert result == "A-on+B-on"
 
+    def test_nested_outer_false_inner_true(self):
+        """Bug-Regression: nested IF in outer-false darf nicht den falschen close-tag matchen."""
+        template = "{{#IF OUTER}}outer-{{#IF INNER}}inner{{/IF}}-end{{/IF}}AFTER"
+        result = render_template(template, {"OUTER": False, "INNER": True})
+        assert result == "AFTER"
+        assert "{{/IF}}" not in result
+        assert "outer" not in result
+
+    def test_consecutive_if_blocks(self):
+        """Bug-Regression: 2 aufeinanderfolgende IF-Bloecke."""
+        template = "{{#IF A}}a{{/IF}}{{#IF B}}b{{/IF}}"
+        result = render_template(template, {"A": False, "B": True})
+        assert result == "b"
+        assert "{{" not in result
+
+    def test_orphan_if_tag_removed(self):
+        """Orphan {{/IF}} aufraeumen."""
+        template = "Text{{/IF}}mehr"
+        result = render_template(template, {})
+        assert "{{/IF}}" not in result
+
+    def test_real_go_gf_pattern(self):
+        """Realistic Pattern aus GO-GF Template."""
+        template = (
+            "{{#IF HAS_CEO_DESIGNATION}}Mit CEO {{CEO_NAME}}{{#IF HAS_SHA}} und SHA{{/IF}}.{{/IF}}"
+            "{{#IF NOT HAS_CEO_DESIGNATION}}Kein CEO. Eskalation nach § 6.{{/IF}}"
+        )
+        # Fall: kein CEO, kein SHA
+        r1 = render_template(template, {"HAS_CEO_DESIGNATION": False, "HAS_SHA": False})
+        assert r1 == "Kein CEO. Eskalation nach § 6."
+        # Fall: CEO + SHA
+        r2 = render_template(template, {"HAS_CEO_DESIGNATION": True, "HAS_SHA": True, "CEO_NAME": "Benjamin"})
+        assert r2 == "Mit CEO Benjamin und SHA."
+        # Fall: CEO ohne SHA
+        r3 = render_template(template, {"HAS_CEO_DESIGNATION": True, "HAS_SHA": False, "CEO_NAME": "Benjamin"})
+        assert r3 == "Mit CEO Benjamin."
+
     def test_find_undefined_placeholders(self):
         template = "{{X}} {{Y}} {{#IF Z}}.{{/IF}}"
         undefined = find_undefined_placeholders(template, {"X": "1"})