1 files changed, 51 insertions, 0 deletions
diff --git a/Tests/AK/TestByteBuffer.cpp b/Tests/AK/TestByteBuffer.cpp
new file mode 100644
index 0000000000..a6fabd7085
--- /dev/null
+++ b/Tests/AK/TestByteBuffer.cpp
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTest/TestCase.h>
+
+#include <AK/ByteBuffer.h>
+
+TEST_CASE(equality_operator)
+{
+    ByteBuffer a = ByteBuffer::copy("Hello, world", 7);
+    ByteBuffer b = ByteBuffer::copy("Hello, friend", 7);
+    // `a` and `b` are both "Hello, ".
+    ByteBuffer c = ByteBuffer::copy("asdf", 4);
+    ByteBuffer d;
+    EXPECT_EQ(a == a, true);
+    EXPECT_EQ(a == b, true);
+    EXPECT_EQ(a == c, false);
+    EXPECT_EQ(a == d, false);
+    EXPECT_EQ(b == a, true);
+    EXPECT_EQ(b == b, true);
+    EXPECT_EQ(b == c, false);
+    EXPECT_EQ(b == d, false);
+    EXPECT_EQ(c == a, false);
+    EXPECT_EQ(c == b, false);
+    EXPECT_EQ(c == c, true);
+    EXPECT_EQ(c == d, false);
+    EXPECT_EQ(d == a, false);
+    EXPECT_EQ(d == b, false);
+    EXPECT_EQ(d == c, false);
+    EXPECT_EQ(d == d, true);
+}
+
+/*
+ * FIXME: These `negative_*` tests should cause precisely one compilation error
+ * each, and always for the specified reason. Currently we do not have a harness
+ * for that, so in order to run the test you need to set the #define to 1, compile
+ * it, and check the error messages manually.
+ */
+#define COMPILE_NEGATIVE_TESTS 0
+#if COMPILE_NEGATIVE_TESTS
+TEST_CASE(negative_operator_lt)
+{
+    ByteBuffer a = ByteBuffer::copy("Hello, world", 10);
+    ByteBuffer b = ByteBuffer::copy("Hello, friend", 10);
+    [[maybe_unused]] auto res = a < b;
+    // error: error: use of deleted function ‘bool AK::ByteBuffer::operator<(const AK::ByteBuffer&) const’
+}
+#endif /* COMPILE_NEGATIVE_TESTS */