From deafd9a6fa34938c0c8c9589097e8c84e39bfa1b Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Thu, 22 Oct 2026 15:47:50 -0700
Subject: Split out the constructor chapter

---
 .../java/com/seaofnodes/simple/Chapter01Test.java  | 95 ++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 chapter-construction/src/test/java/com/seaofnodes/simple/Chapter01Test.java

(limited to 'chapter-construction/src/test/java/com/seaofnodes/simple/Chapter01Test.java')

diff --git a/chapter-construction/src/test/java/com/seaofnodes/simple/Chapter01Test.java b/chapter-construction/src/test/java/com/seaofnodes/simple/Chapter01Test.java
new file mode 100644
index 00000000..ac9adacc
--- /dev/null
+++ b/chapter-construction/src/test/java/com/seaofnodes/simple/Chapter01Test.java
@@ -0,0 +1,95 @@
+package com.seaofnodes.simple;
+
+import com.seaofnodes.simple.codegen.CodeGen;
+import com.seaofnodes.simple.node.*;
+import com.seaofnodes.simple.type.TypeInteger;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class Chapter01Test {
+
+    @Test
+    public void testSimpleProgram() {
+        CodeGen code = new CodeGen("return 1;").parse();
+        Node expr = code.expr();
+        if( expr instanceof ConstantNode con ) {
+            assertEquals(code._start,con.in(0));
+            assertEquals(TypeInteger.constant(1), con._type);
+        } else {
+            fail();
+        }
+    }
+
+    @Test
+    public void testZero() {
+        CodeGen code = new CodeGen("return 0;");
+        code.parse();
+        Node use = code.expr();
+        if( use instanceof ConstantNode con && con._type instanceof TypeInteger )
+            assertEquals(TypeInteger.constant(0),con._type);
+    }
+
+    @Test
+    public void testBad1() {
+        try {
+            new CodeGen("ret;").parse();
+            fail();
+        } catch( RuntimeException e ) {
+            assertEquals("Undefined name 'ret'",e.getMessage());
+        }
+    }
+
+    @Test
+    public void testBad2() {
+        try {
+            new CodeGen("return 0123;").parse();
+            fail();
+        } catch( RuntimeException e ) {
+            assertEquals("Syntax error: integer values cannot start with '0'",e.getMessage());
+        }
+    }
+
+    @Test
+    public void testNotBad3() {
+        // this test used to fail in chapter 1
+        assertEquals("return 12;", new CodeGen("return - -12;").parse()._stop.print());
+    }
+
+    @Test
+    public void testBad4() {
+        try {
+            new CodeGen("return 100").parse();
+            fail();
+        } catch( RuntimeException e ) {
+            assertEquals("Syntax error, expected ;: ",e.getMessage());
+        }
+    }
+
+    @Test
+    public void testNotBad5() {
+        // this test used to fail in chapter 1
+        assertEquals("return -100;", new CodeGen("return -100;").parse()._stop.print());
+    }
+
+    @Test
+    public void testBad6() {
+        try {
+            new CodeGen("return100;").parse();
+            fail();
+        } catch( RuntimeException e ) {
+            assertEquals("Undefined name 'return100'",e.getMessage());
+        }
+    }
+
+    @Test
+    public void testBad7() {
+        try {
+            new CodeGen("return 1;}").parse();
+            fail();
+        } catch( RuntimeException e ) {
+            assertEquals("Syntax error, unexpected: }",e.getMessage());
+        }
+    }
+
+}
-- 
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