backend/plugins: Throw error if E-Hentai response is missing 'gmetadata'

It might be that we get a valid (maybe empty) response from the API, in
which case we do not want to simply crash because we expect the
'gmetadata' field in the response. Instead, throw a proper ScrapeError
for it.

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/plugins/scrapers/test_ehentai_api.py b/tests/plugins/scrapers/test_ehentai_api.py
index dd283e1..c746440 100644
--- a/tests/plugins/scrapers/test_ehentai_api.py
+++ b/tests/plugins/scrapers/test_ehentai_api.py
@@ -124,6 +124,22 @@ def test_raises_scrape_error_with_invalid_json(requests_mock, gen_comic):
         assert set(scraper.collect()) == set()
 
 
+def test_raises_scrape_error_with_missing_field(requests_mock, gen_comic):
+    comic = next(gen_comic)
+    comic.url = "https://exhentai.org/g/1025913/fdaabef1a2"
+
+    scraper = ehentai_api.EHentaiAPIScraper(comic)
+
+    requests_mock.post(ehentai_api.API_URL, text="{}")
+
+    assert scraper.is_available
+    assert scraper.id == 1025913
+    assert scraper.token == "fdaabef1a2"
+
+    with pytest.raises(ScrapeError, match="Response is missing 'gmetadata' field"):
+        assert set(scraper.collect()) == set()
+
+
 def test_raises_scrape_error_with_error_code(requests_mock, gen_comic):
     comic = next(gen_comic)
     comic.url = "https://exhentai.org/g/1025913/fdaabef1a2"