1 files changed, 40 insertions, 0 deletions
diff --git a/HutchTests/GitObjectTests.swift b/HutchTests/GitObjectTests.swift
new file mode 100644
index 0000000..547c6f3
--- /dev/null
+++ b/HutchTests/GitObjectTests.swift
@@ -0,0 +1,40 @@
+import Foundation
+import Testing
+@testable import Hutch
+
+struct GitObjectTests {
+
+    @Test
+    @MainActor
+    func decodesMetadataOnlyTextBlobUsingTypename() throws {
+        let data = Data(#"{"type":"BLOB","__typename":"TextBlob","id":"blob123","shortId":"blob123","size":42}"#.utf8)
+
+        let blob = try JSONDecoder().decode(GitObject.self, from: data)
+
+        guard case .textBlob(let textBlob) = blob else {
+            Issue.record("Expected metadata-only blob to decode as text blob.")
+            return
+        }
+
+        #expect(textBlob.id == "blob123")
+        #expect(textBlob.size == 42)
+        #expect(textBlob.text == nil)
+    }
+
+    @Test
+    @MainActor
+    func decodesMetadataOnlyBinaryBlobUsingTypename() throws {
+        let data = Data(#"{"type":"BLOB","__typename":"BinaryBlob","id":"blob456","shortId":"blob456","size":64}"#.utf8)
+
+        let blob = try JSONDecoder().decode(GitObject.self, from: data)
+
+        guard case .binaryBlob(let binaryBlob) = blob else {
+            Issue.record("Expected metadata-only blob to decode as binary blob.")
+            return
+        }
+
+        #expect(binaryBlob.id == "blob456")
+        #expect(binaryBlob.size == 64)
+        #expect(binaryBlob.content == nil)
+    }
+}