Add Binary Operator and Grouping (in Expressions) Tests

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

Tests/p4rseTests/BinaryOperatorTests/String.swift

@@ -0,0 +1,220 @@
+// 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 P4Lang
+import P4Runtime
+import SwiftTreeSitter
+import Testing
+import TreeSitter
+import TreeSitterP4
+
+@testable import P4Compiler
+
+// String binary operator tests ...
+
+@Test func test_simple_parser_binary_operator_equal_string() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("five" == "five") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.accept)
+}
+
+@Test func test_simple_parser_binary_operator_equal_not_equal_string() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("five" == "six") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.reject)
+}
+
+@Test func test_simple_parser_binary_operator_less_than_string() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("five" < "six") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.accept)
+}
+
+@Test func test_simple_parser_binary_operator_less_than_equal_string() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("six" <= "six") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.accept)
+}
+
+@Test func test_simple_parser_binary_operator_greater_than_string() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("twelve" > "six") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.accept)
+}
+
+@Test func test_simple_parser_binary_operator_greater_than_equal_string() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("twelve" >= "six") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.accept)
+}
+
+@Test func test_simple_parser_binary_operator_less_than_string_not() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("six" < "five") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.reject)
+}
+
+@Test func test_simple_parser_binary_operator_less_than_equal_string_not() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("six" <= "five") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.reject)
+}
+
+@Test func test_simple_parser_binary_operator_greater_than_string_not() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("five" > "six") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.reject)
+}
+
+@Test func test_simple_parser_binary_operator_greater_than_equal_string_not() async throws {
+  let simple = """
+    parser main_parser() {
+       state start {
+           transition select ("five" >= "six") {
+              true: accept;
+              false: reject;
+           };
+       }
+    };
+  """
+
+  let program = try #UseOkResult(Program.Compile(simple))
+  let runtime = try #UseOkResult(P4Runtime.ParserRuntime.create(program: program))
+  let (state_result, _) = try! #UseOkResult(runtime.run())
+
+  #expect(state_result == P4Lang.reject)
+}