1 files changed, 56 insertions, 0 deletions
diff --git a/backend/unittests/Support/ErrorTest.cpp b/backend/unittests/Support/ErrorTest.cpp
new file mode 100644
index 0000000..803ccee
--- /dev/null
+++ b/backend/unittests/Support/ErrorTest.cpp
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "rcc/Support/Error.h"
+
+#include <iostream>
+#include <string>
+
+namespace {
+
+int fail(const char *Message) {
+  std::cerr << Message << '\n';
+  return 1;
+}
+
+} // namespace
+
+int main() {
+  rcc::Expected<int> Value = 42;
+  if (!Value || *Value != 42)
+    return fail("Expected must preserve a successful value");
+
+  rcc::Expected<int> Failure = rcc::makeUnexpected(rcc::ErrorCode::ParseError, "bad MIR");
+  if (Failure)
+    return fail("Expected must preserve an error");
+  if (Failure.error().code() != rcc::ErrorCode::ParseError)
+    return fail("Error must preserve its code");
+  if (Failure.error().message() != "bad MIR")
+    return fail("Error must preserve its message");
+  if (rcc::getErrorCodeName(Failure.error().code()) != "parse error")
+    return fail("Error code must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::FrameLayoutFailed) != "frame layout failed")
+    return fail("frame-layout errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::SchedulingFailed) != "scheduling failed")
+    return fail("scheduling errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::BranchRelaxationFailed) != "branch relaxation failed")
+    return fail("branch-relaxation errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::PseudoExpansionFailed) != "pseudo expansion failed")
+    return fail("pseudo-expansion errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::FinalEncodabilityFailed) != "final encodability failed")
+    return fail("final-encodability errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::CFGOptimizationFailed) != "CFG optimization failed")
+    return fail("CFG-optimization errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::AssemblyLoweringFailed) != "assembly lowering failed")
+    return fail("assembly-lowering errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::InstructionEncodingFailed) !=
+      "instruction encoding failed")
+    return fail("instruction-encoding errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::FixupApplicationFailed) != "fixup application failed")
+    return fail("fixup-application errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::RelocationFailed) != "relocation failed")
+    return fail("relocation errors must have a stable name");
+  if (rcc::getErrorCodeName(rcc::ErrorCode::ObjectWritingFailed) != "object writing failed")
+    return fail("object-writing errors must have a stable name");
+
+  return 0;
+}