feat: Porting wasm host function tests to new design

src/tests/libxrpl/tx/wasm/host_functions/EscrowKeylet.cpp

@@ -0,0 +1,50 @@
+#include <xrpl/protocol/AccountID.h>
+#include <xrpl/protocol/Indexes.h>
+#include <xrpl/protocol/SeqProxy.h>
+#include <xrpl/tx/wasm/WasmCommon.h>
+
+#include <gtest/gtest.h>
+#include <helpers/Account.h>
+#include <tx/wasm/RealHostFixture.h>
+
+#include <cstdint>
+#include <expected>
+#include <iterator>
+
+namespace xrpl::test {
+
+struct EscrowKeyletImpl : WasmImplTest
+{
+};
+
+TEST_F(EscrowKeyletImpl, MatchesLedgerKeyletFunction)
+{
+    auto const owner = Account{"owner"};
+    auto const seq = std::uint32_t{42};
+
+    auto const result = host().escrowKeylet(owner.id(), seq);
+
+    ASSERT_TRUE(result.has_value());
+    auto const expected = keylet::escrow(owner.id(), SeqProxy::rawSequence(seq)).key;
+    auto const expectedBytes = Bytes{std::begin(expected), std::end(expected)};
+    EXPECT_EQ(*result, expectedBytes);
+}
+
+TEST_F(EscrowKeyletImpl, DifferentAccountsGiveDifferentKeylets)
+{
+    auto const a = host().escrowKeylet(Account{"alice"}.id(), 7);
+    auto const b = host().escrowKeylet(Account{"becky"}.id(), 7);
+
+    ASSERT_TRUE(a.has_value() && b.has_value());
+    EXPECT_NE(*a, *b);
+}
+
+TEST_F(EscrowKeyletImpl, UnsetAccountIsInvalidAccount)
+{
+    auto const result = host().escrowKeylet(AccountID{}, 1);
+
+    ASSERT_FALSE(result.has_value());
+    EXPECT_EQ(result.error(), HostFunctionError::InvalidAccount);
+}
+
+}  // namespace xrpl::test