--- /dev/null
+/*
+ * PROJECT: ReactOS API Tests
+ * LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
+ * PURPOSE: Test for RtlValidateUnicodeString
+ * COPYRIGHT: Copyright 2020 Hermes Belusca-Maito
+ */
+
+#include "precomp.h"
+
+START_TEST(RtlValidateUnicodeString)
+{
+ NTSTATUS Status;
+ UNICODE_STRING String;
+ UNICODE_STRING ValidString = RTL_CONSTANT_STRING(L"My Wild String!");
+
+ /* Start with a valid Unicode string */
+ String = ValidString;
+
+ /* Non-zero flags are unsupported! */
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_SUCCESS, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(1, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(0xdeadbeef, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+ /* Empty string is allowed. Test also the flags. */
+ RtlInitEmptyUnicodeString(&String, NULL, 0);
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_SUCCESS, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(1, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(0xdeadbeef, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+ // With a non-NULL but empty buffer, and zero lengths.
+ String.Buffer = L"";
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_SUCCESS, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(1, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(0xdeadbeef, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+ // With a non-NULL but empty buffer, and zero Length, non-zero MaximumLength.
+ String.Buffer = L"";
+ String.Length = 0;
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_SUCCESS, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(1, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(0xdeadbeef, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+ /* NULL pointer is also allowed! Test also the flags. */
+ Status = RtlValidateUnicodeString(0, NULL);
+ ok(Status == STATUS_SUCCESS, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(1, NULL);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+ Status = RtlValidateUnicodeString(0xdeadbeef, NULL);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+
+ /*
+ * Now test invalid strings.
+ */
+
+ // NULL buffer but non-zero lengths.
+ String = ValidString;
+ String.Buffer = NULL;
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+ // NULL buffer, zero Length, non-zero MaximumLength.
+ String = ValidString;
+ String.Buffer = NULL;
+ String.Length = 0;
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+ // NULL buffer, non-zero Length, zero MaximumLength.
+ String = ValidString;
+ String.Buffer = NULL;
+ String.MaximumLength = 0;
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+ // Non-NULL buffer, non-zero Length, zero MaximumLength.
+ String = ValidString;
+ String.MaximumLength = 0;
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+ /* Non-NULL buffer, odd lengths */
+
+ String = ValidString;
+ String.Length--; // Length was already >= 2 so it remains > 0.
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+
+ String = ValidString;
+ String.MaximumLength--; // MaximumLength was already >= 2 so it remains > 0.
+ Status = RtlValidateUnicodeString(0, &String);
+ ok(Status == STATUS_INVALID_PARAMETER, "Status = 0x%lx\n", Status);
+}