1 files changed, 38 insertions, 0 deletions
diff --git a/spec/lib/gitlab/git/checksum_spec.rb b/spec/lib/gitlab/git/checksum_spec.rb
new file mode 100644
index 00000000000..8ff310905bf
--- /dev/null
+++ b/spec/lib/gitlab/git/checksum_spec.rb
@@ -0,0 +1,38 @@
+require 'spec_helper'
+
+describe Gitlab::Git::Checksum, seed_helper: true do
+  let(:storage) { 'default' }
+
+  it 'raises Gitlab::Git::Repository::NoRepository when there is no repo' do
+    checksum = described_class.new(storage, 'nonexistent-repo')
+
+    expect { checksum.calculate }.to raise_error Gitlab::Git::Repository::NoRepository
+  end
+
+  it 'pretends that checksum is 000000... when the repo is empty' do
+    FileUtils.rm_rf(File.join(SEED_STORAGE_PATH, 'empty-repo.git'))
+
+    system(git_env, *%W(#{Gitlab.config.git.bin_path} init --bare empty-repo.git),
+           chdir: SEED_STORAGE_PATH,
+           out:   '/dev/null',
+           err:   '/dev/null')
+
+    checksum = described_class.new(storage, 'empty-repo')
+
+    expect(checksum.calculate).to eq '0000000000000000000000000000000000000000'
+  end
+
+  it 'raises Gitlab::Git::Repository::Failure when shelling out to git return non-zero status' do
+    checksum = described_class.new(storage, 'gitlab-git-test')
+
+    allow(checksum).to receive(:popen).and_return(['output', nil])
+
+    expect { checksum.calculate }.to raise_error Gitlab::Git::Checksum::Failure
+  end
+
+  it 'calculates the checksum when there is a repo' do
+    checksum = described_class.new(storage, 'gitlab-git-test')
+
+    expect(checksum.calculate).to eq '54f21be4c32c02f6788d72207fa03ad3bce725e4'
+  end
+end