[M1] add util::Error, Result<T>, format()

2026-05-08 00:00:21 +00:00
parent 6e922b7249
commit fba725e192
8 changed files with 183 additions and 2 deletions
--- a/tests/util_error.cpp
+++ b/tests/util_error.cpp
@@ -0,0 +1,69 @@
+#include <catch2/catch_test_macros.hpp>
+
+import cargoxx.util;
+import std;
+
+using cargoxx::util::Error;
+using cargoxx::util::ErrorCode;
+using cargoxx::util::format;
+
+TEST_CASE("format renders code, message, and trailing newline", "[util][format]") {
+    Error e{ErrorCode::ManifestNotFound, "manifest not found", "", std::nullopt, std::nullopt};
+    REQUIRE(format(e) == "error[E0001]: manifest not found\n");
+}
+
+TEST_CASE("format pads error codes to four digits", "[util][format]") {
+    Error e{ErrorCode::Internal, "boom", "", std::nullopt, std::nullopt};
+    REQUIRE(format(e) == "error[E0100]: boom\n");
+}
+
+TEST_CASE("format includes location with line:col when present", "[util][format]") {
+    Error e{
+        ErrorCode::ManifestParseError,
+        "syntax error",
+        "",
+        std::filesystem::path{"Cargoxx.toml"},
+        std::pair{7, 1},
+    };
+    REQUIRE(format(e) == "error[E0002]: syntax error\n"
+                         "  --> Cargoxx.toml:7:1\n");
+}
+
+TEST_CASE("format includes location without line:col when only path is set", "[util][format]") {
+    Error e{
+        ErrorCode::LayoutNoTarget,
+        "no target found",
+        "",
+        std::filesystem::path{"./"},
+        std::nullopt,
+    };
+    REQUIRE(format(e) == "error[E0020]: no target found\n"
+                         "  --> ./\n");
+}
+
+TEST_CASE("format appends a hint line when hint is non-empty", "[util][format]") {
+    Error e{
+        ErrorCode::LayoutNoTarget,
+        "no target found",
+        "run `cargoxx new --lib <name>` to create a library project",
+        std::nullopt,
+        std::nullopt,
+    };
+    REQUIRE(format(e) ==
+            "error[E0020]: no target found\n"
+            "  hint: run `cargoxx new --lib <name>` to create a library project\n");
+}
+
+TEST_CASE("format combines location and hint", "[util][format]") {
+    Error e{
+        ErrorCode::LinkdbUnknownPackage,
+        "package not in link database",
+        "file an issue or supply a manual recipe",
+        std::filesystem::path{"Cargoxx.toml"},
+        std::pair{7, 1},
+    };
+    REQUIRE(format(e) ==
+            "error[E0060]: package not in link database\n"
+            "  --> Cargoxx.toml:7:1\n"
+            "  hint: file an issue or supply a manual recipe\n");
+}