From 44505aa5b75b1046f13f2bc2a52fe0b16d975838 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Mon, 10 Aug 2026 11:11:18 -0700
Subject: Chapter 30: Text Formatting and Diagnostics

Co-authored-by: Hsiang-Ying Fu <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: fuhsnn <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: Symious <14933944+symious@users.noreply.github.com>
Co-authored-by: Jun Kawasaki <jun784@gmail.com>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
---
 .../com/seaofnodes/simple/RuntimeArgsTest.java     | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 src/test/java/com/seaofnodes/simple/RuntimeArgsTest.java

(limited to 'src/test/java/com/seaofnodes/simple/RuntimeArgsTest.java')

diff --git a/src/test/java/com/seaofnodes/simple/RuntimeArgsTest.java b/src/test/java/com/seaofnodes/simple/RuntimeArgsTest.java
new file mode 100644
index 00000000..9086e00c
--- /dev/null
+++ b/src/test/java/com/seaofnodes/simple/RuntimeArgsTest.java
@@ -0,0 +1,29 @@
+package com.seaofnodes.simple;
+
+import java.io.IOException;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class RuntimeArgsTest extends TestC {
+    @Test public void testNativeArguments() throws IOException {
+        runArgs("""
+            val main={ u8[~][] args ->
+                if(args#!=4 || args[0]#==0) return 1;
+                if(args[1]#!=0) return 2;
+                val words=args[2];
+                if(words#!=9 || words[3]!=' ' || words[8]!='s') return 3;
+                val longArg=args[3];
+                if(longArg#!=4096) return 4;
+                for(int i=0; i<longArg#; i++) if(longArg[i]!='x') return 5;
+                return 0;
+            };
+            ""","runtimeArgs",null,CALL_CONVENTION,"",-1,"","two words","x".repeat(4096));
+    }
+
+    @Test public void testArgumentCopiesAndEmptyVector() throws IOException {
+        String exe="build/objs/runtimeArgsCopy"+(OS.startsWith("Windows") ? ".exe" : "");
+        linkExe(runtimeObject("simple_args"),OS.startsWith("Windows") ? "ms_abi" : "sysv_abi",
+                C_DRIVERS_DIR+"runtime_args.c",null,exe);
+        assertEquals("ok\n",exec(TEST_TIMEOUT_SECONDS,exe));
+    }
+}
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