diff --git a/aidl_unittest.cpp b/aidl_unittest.cpp
index 36d82c9..e5fe9e9 100644
--- a/aidl_unittest.cpp
+++ b/aidl_unittest.cpp
@@ -1049,6 +1049,27 @@
   EXPECT_THAT(code, testing::HasSubstr("public static final int y = 1;"));
 }
 
+TEST_F(AidlTest, ConstantValueCast) {
+  using Ptr = unique_ptr<AidlConstantValue>;
+  const AidlLocation& loc = AIDL_LOCATION_HERE;
+
+  EXPECT_EQ('c', Ptr(AidlConstantValue::Character(loc, 'c'))->Cast<char>());
+  EXPECT_EQ("abc", Ptr(AidlConstantValue::String(loc, "\"abc\""))->Cast<string>());
+  EXPECT_FLOAT_EQ(1.0f, Ptr(AidlConstantValue::Floating(loc, "1.0"))->Cast<float>());
+  EXPECT_EQ(true, Ptr(AidlConstantValue::Boolean(loc, true))->Cast<bool>());
+
+  AidlBinaryConstExpression one_plus_one(loc, Ptr(AidlConstantValue::Integral(loc, "1")), "+",
+                                         Ptr(AidlConstantValue::Integral(loc, "1")));
+  EXPECT_EQ(2, one_plus_one.Cast<int32_t>());
+
+  auto values = unique_ptr<vector<Ptr>>{new vector<Ptr>};
+  values->emplace_back(AidlConstantValue::String(loc, "\"hello\""));
+  values->emplace_back(AidlConstantValue::String(loc, "\"world\""));
+  vector<string> expected{"hello", "world"};
+  EXPECT_EQ(expected,
+            Ptr(AidlConstantValue::Array(loc, std::move(values)))->Cast<vector<string>>());
+}
+
 TEST_P(AidlTest, FailOnManyDefinedTypes) {
   AidlError error;
   const string expected_stderr =