Diffusion Ant (feature/nursery) Code

ant/tests/test_try_catch.cjs
ddfe6237cab5feature/nursery

test_try_catch.cjs
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			// Test 1: Basic try-catch
			console.log("Test 1: Basic try-catch");
			let result1 = "not caught";
			try {
			throw new Error("test error");
			result1 = "should not reach";
			} catch (e) {
			result1 = "caught: " + e.message;
			}
			console.log(result1);

			// Test 2: Try without exception
			console.log("\nTest 2: Try without exception");
			let result2 = "initial";
			try {
			result2 = "no error";
			} catch (e) {
			result2 = "caught";
			}
			console.log(result2);

			// Test 3: Try-catch-finally
			console.log("\nTest 3: Try-catch-finally");
			let result3 = [];
			try {
			result3.push("try");
			throw new Error("error");
			} catch (e) {
			result3.push("catch");
			} finally {
			result3.push("finally");
			}
			console.log(result3.join(", "));

			// Test 4: Finally without catch
			console.log("\nTest 4: Try-finally (no exception)");
			let result4 = [];
			try {
			result4.push("try");
			} finally {
			result4.push("finally");
			}
			console.log(result4.join(", "));

			// Test 5: Catch without parentheses (optional binding)
			console.log("\nTest 5: Catch without binding");
			let result5 = "not caught";
			try {
			throw "error string";
			} catch {
			result5 = "caught without binding";
			}
			console.log(result5);

			// Test 6: Nested try-catch
			console.log("\nTest 6: Nested try-catch");
			let result6 = [];
			try {
			result6.push("outer try");
			try {
			result6.push("inner try");
			throw new Error("inner error");
			} catch (e) {
			result6.push("inner catch: " + e.message);
			}
			result6.push("after inner");
			} catch (e) {
			result6.push("outer catch");
			}
			console.log(result6.join(", "));

			// Test 7: Rethrow in catch
			console.log("\nTest 7: Rethrow in catch");
			let result7 = [];
			try {
			try {
			throw new Error("original");
			} catch (e) {
			result7.push("first catch: " + e.message);
			throw new Error("rethrown");
			}
			} catch (e) {
			result7.push("second catch: " + e.message);
			}
			console.log(result7.join(", "));

			// Test 8: Finally runs even with return
			console.log("\nTest 8: Finally with return");
			function testFinallyReturn() {
			let x = [];
			try {
			x.push("try");
			return x;
			} finally {
			x.push("finally");
			}
			}
			console.log(testFinallyReturn().join(", "));

			// Test 9: Access error properties
			console.log("\nTest 9: Error properties");
			try {
			throw new Error("test message");
			} catch (e) {
			console.log("name: " + e.name);
			console.log("message: " + e.message);
			}

			// Test 10: Custom error class
			console.log("\nTest 10: Custom error class");
			class CustomError extends Error {
			constructor(msg) {
			super(msg);
			this.name = "CustomError";
			}
			}

			try {
			throw new CustomError("custom message");
			} catch (e) {
			console.log("Caught " + e.name + ": " + e.message);
			}

			// Test 11: Finally modifies value
			console.log("\nTest 11: Finally executes after catch");
			let counter = 0;
			try {
			counter = 1;
			throw new Error("test");
			} catch (e) {
			counter = 2;
			} finally {
			counter = counter + 10;
			}
			console.log("counter: " + counter);

			// Test 12: Exception in finally propagates
			console.log("\nTest 12: Exception in try, no catch");
			let result12 = [];
			try {
			try {
			throw new Error("original error");
			} finally {
			result12.push("finally ran");
			}
			} catch (e) {
			result12.push("outer caught: " + e.message);
			}
			console.log(result12.join(", "));

			console.log("\nAll tests completed!");

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