cmd/otk-resolve-ostree-commit: repeat tests with commit ID in input

When a commit ID is used in place of the ref, the resolver returns the
input commit ID as both the ref and the checksum.
No request goes to the server for this call.

cmd/otk-resolve-ostree-commit/main_test.go

@@ -74,4 +74,31 @@ func TestResolver(t *testing.T) {
 		assert.Equal(expOutput, output)
 	}
 
+	// repeat test but use the commit ID in the request directly (no ref resolve)
+	for _, id := range commitMap {
+		inputReq, err := json.Marshal(map[string]map[string]string{
+			"tree": {
+				"url": url,
+				"ref": id,
+			},
+		})
+		require.NoError(err)
+
+		inpBuf := bytes.NewBuffer(inputReq)
+		outBuf := &bytes.Buffer{}
+
+		assert.NoError(resolver.Run(inpBuf, outBuf))
+
+		var output map[string]map[string]string
+		require.NoError(json.Unmarshal(outBuf.Bytes(), &output))
+
+		expOutput := map[string]map[string]string{
+			"tree": {
+				"url":      url,
+				"ref":      id,
+				"checksum": id,
+			},
+		}
+		assert.Equal(expOutput, output)
+	}
 }