test: expect fail on empty repo.js

After the fix for #192, the behavior of RepoLoadJson for empty JSON files
changed from accepting the file to rejecting it.

The new behavior is actually better than the old one, so we just update the
tests to succeed with the new behavior and fail with the old one.

Author: brliron

thcrap_test/src/repo.cpp

@@ -23,17 +23,7 @@ TEST(RepoTest, RepoLoadJsonInvalid)
 TEST(RepoTest, RepoLoadJsonEmpty)
 {
     ScopedJson json = json_object();
-    repo_t *repo = RepoLoadJson(*json);
-    ASSERT_NE(repo, nullptr);
-
-    EXPECT_EQ(repo->id, nullptr);
-    EXPECT_EQ(repo->title, nullptr);
-    EXPECT_EQ(repo->contact, nullptr);
-    EXPECT_EQ(repo->servers, nullptr);
-    EXPECT_EQ(repo->neighbors, nullptr);
-    EXPECT_EQ(repo->patches, nullptr);
-
-    RepoFree(repo);
+    EXPECT_EQ(RepoLoadJson(*json), nullptr);
 }
 
 TEST(RepoTest, RepoLoadJsonValid)