Refactor Tests

Signed-off-by: Will Hawkins <hawkinsw@obs.cr>

Tests/p4rseTests/ParserCompilerTests.swift

@@ -0,0 +1,118 @@
+// p4rse, Copyright 2026, Will Hawkins
+//
+// This file is part of p4rse.
+//
+// This file is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import Common
+import Foundation
+import Macros
+import Runtime
+import SwiftTreeSitter
+import Testing
+import TreeSitter
+import TreeSitterP4
+import P4Lang
+
+@testable import P4Compiler
+
+@Test func test_simple_parser_syntax_error() async throws {
+  let simple_parser_declaration = """
+    parser main_parser() {
+       state
+           transition start;
+       }
+    };
+    """
+  #expect(
+    #RequireErrorResult(
+      Error(withMessage: "Could not compile the P4 program"),
+      Program.Compile(simple_parser_declaration)))
+}
+
+@Test func test_simple_compilation_with_statement() async throws {
+  let simple_parser_declaration = """
+    parser main_parser() {
+       state start {
+           true;
+           transition start;
+       }
+    };
+    """
+
+  let program = try #UseOkResult(Program.Compile(simple_parser_declaration))
+  let parser = try #UseOkResult(program.find_parser(withName: Identifier(name: "main_parser")))
+
+  #expect(parser.states.count() == 1)
+
+  let state = try! #require(parser.states.find(withIdentifier: Identifier(name: "start")))
+  #expect(state.state == Identifier(name: "start"))
+  #expect(state.statements.count == 1)
+}
+
+@Test func test_simple_compilation_with_instantiation() async throws {
+  let simple_parser_declaration = """
+    parser main_parser() {
+       state start {
+           true;
+           false;
+           transition start;
+       }
+    };
+    bool() main;
+    """
+
+  let program = try #UseOkResult(Program.Compile(simple_parser_declaration))
+  #expect(#RequireOkResult(program.find_parser(withName: Identifier(name: "main_parser"))))
+}
+
+@Test func test_invalid_transition_expression_keyset_expressions() async throws {
+  let simple_parser_declaration = """
+    parser main_parser() {
+       state start {
+           transition select (false) {
+              asdf: reject;
+              asde: reject;
+           };
+       }
+    };
+    """
+
+  let compilation_error = try #UseErrorResult(Program.Compile(simple_parser_declaration))
+
+  #expect(compilation_error.msg.contains("asde"))
+  #expect(compilation_error.msg.contains("asdf"))
+}
+
+@Test func test_simple_compiler_macro_nodetype_test() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select (false) {
+              asdf: reject;
+              asde: reject;
+           };
+       }
+    };
+  """
+
+  let p = try! #UseOkResult(ConfigureP4Parser())
+  let result = try! #require(p.parse(simple))
+
+  #expect(
+    #RequireErrorResult<(EvaluatableStatement, CompilerContext)>(
+      Error(withMessage: "{2, 154}: Did not find assignment statement"),
+      ParserAssignmentStatement.Compile( // Note: Calling ParserAssignmentStatement compilation directly.
+        node: result.rootNode!, withContext: CompilerContext(withNames: LexicalScopes()))))
+}