Write a test case using a test fixture repository

This test fails now because the tarball fetching of sources does not
include files from the submodule (but the fixture references a file as a
data-file)

Author: ch1bo

tests/Tests.hs

@@ -35,6 +35,12 @@ main = do
                   assertFailure "entry for pkg-a-2.3.4.5 is missing"
                 Just entry -> do
                   entryTime entry @?= 1648534790
+      , testCaseSteps "git submodules" $ \step ->
+          inTemporaryDirectoryWithFixture "tests/fixtures/git-submodule" $ do
+            step "Building repository"
+            -- TODO: build fails because of cabal-install not finding the
+            -- referenced files from the submodule
+            callCommand "foliage build"
       , ---
         testCaseSteps "accepts --no-signatures" $ \step ->
           inTemporaryDirectoryWithFixture "tests/fixtures/simple" $ do

tests/fixtures/git-submodule/_sources/foliage-test-with-submodule/1.0.0/meta.toml

@@ -0,0 +1,2 @@
+timestamp = 2023-11-03T15:53:59+00:00
+github = { repo = "cardano-scaling/foliage-test-with-submodule", rev = "db5874494ee5bac3fa8fee07d5806fcec27a2f4e" }