1 files changed, 41 insertions, 0 deletions
diff --git a/test/models/blob_test.rb b/test/models/blob_test.rb
new file mode 100644
index 0000000000..ddc000ed51
--- /dev/null
+++ b/test/models/blob_test.rb
@@ -0,0 +1,41 @@
+require "test_helper"
+require "database/setup"
+require "active_storage/blob"
+
+class ActiveStorage::BlobTest < ActiveSupport::TestCase
+  test "create after upload sets byte size and checksum" do
+    data = "Hello world!"
+    blob = create_blob data: data
+
+    assert_equal data, blob.download
+    assert_equal data.length, blob.byte_size
+    assert_equal Digest::MD5.base64digest(data), blob.checksum
+  end
+
+  test "download yields chunks" do
+    blob   = create_blob data: "a" * 75.kilobytes
+    chunks = []
+
+    blob.download do |chunk|
+      chunks << chunk
+    end
+
+    assert_equal 2, chunks.size
+    assert_equal "a" * 64.kilobytes, chunks.first
+    assert_equal "a" * 11.kilobytes, chunks.second
+  end
+
+  test "urls expiring in 5 minutes" do
+    blob = create_blob
+
+    freeze_time do
+      assert_equal expected_url_for(blob), blob.url
+      assert_equal expected_url_for(blob, disposition: :attachment), blob.url(disposition: :attachment)
+    end
+  end
+
+  private
+    def expected_url_for(blob, disposition: :inline)
+      "/rails/active_storage/disk/#{ActiveStorage::VerifiedKeyWithExpiration.encode(blob.key, expires_in: 5.minutes)}/#{blob.filename}?disposition=#{disposition}"
+    end
+end