Chapter 2: Arithmeticlinear-chapter02

Co-authored-by: Cliff Click <cliffc@acm.org>
Co-authored-by: Thalia Archibald <thalia@archibald.dev>
Co-authored-by: Yichen Yan <oraluben@outlook.com>
Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com>
Co-authored-by: Tamás Hadházy <85063808+Hels15@users.noreply.github.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/src/test/java/com/seaofnodes/simple/Chapter02Test.java b/src/test/java/com/seaofnodes/simple/Chapter02Test.java
new file mode 100644
index 00000000..36e62f9b
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+++ b/src/test/java/com/seaofnodes/simple/Chapter02Test.java
@@ -0,0 +1,66 @@
+package com.seaofnodes.simple;
+
+import com.seaofnodes.simple.node.*;
+import com.seaofnodes.simple.type.TypeInteger;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class Chapter02Test {
+
+    @Test
+    public void testParseGrammar() {
+        Node._disablePeephole = true; // disable peephole so we can observe full graph
+        Parser parser = new Parser("return 1+2*3+-5;");
+        ReturnNode ret = parser.parse();
+        assertEquals("return (1+((2*3)+(-5)));", ret.print());
+        GraphVisualizer gv = new GraphVisualizer();
+        System.out.println(gv.generateDotOutput(parser));
+        Node._disablePeephole = false;
+    }
+
+    @Test
+    public void testAddPeephole() {
+        Parser parser = new Parser("return 1+2;");
+        ReturnNode ret = parser.parse();
+        assertEquals("return 3;", ret.print());
+    }
+
+    @Test
+    public void testSubPeephole() {
+        Parser parser = new Parser("return 1-2;");
+        ReturnNode ret = parser.parse();
+        assertEquals("return -1;", ret.print());
+    }
+
+    @Test
+    public void testMulPeephole() {
+        Parser parser = new Parser("return 2*3;");
+        ReturnNode ret = parser.parse();
+        assertEquals("return 6;", ret.print());
+    }
+
+    @Test
+    public void testDivPeephole() {
+        Parser parser = new Parser("return 6/3;");
+        ReturnNode ret = parser.parse();
+        assertEquals("return 2;", ret.print());
+    }
+
+    @Test
+    public void testMinusPeephole() {
+        Parser parser = new Parser("return 6/-3;");
+        ReturnNode ret = parser.parse();
+        assertEquals("return -2;", ret.print());
+    }
+
+    @Test
+    public void testExample() {
+        Parser parser = new Parser("return 1+2*3+-5;");
+        ReturnNode ret = parser.parse();
+        assertEquals("return 2;", ret.print());
+        GraphVisualizer gv = new GraphVisualizer();
+        System.out.println(gv.generateDotOutput(parser));
+    }
+
+}