Chapter 12: Floatslinear-chapter12

Co-authored-by: Dibyendu Majumdar <mobile@majumdar.org.uk>
Co-authored-by: Thalia Archibald <thalia@archibald.dev>
Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com>
Co-authored-by: Robert Obkircher <robert.obkircher@gmail.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/src/test/java/com/seaofnodes/simple/Chapter12Test.java b/src/test/java/com/seaofnodes/simple/Chapter12Test.java
new file mode 100644
index 00000000..af8fdfe9
--- /dev/null
+++ b/src/test/java/com/seaofnodes/simple/Chapter12Test.java
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+package com.seaofnodes.simple;
+
+import com.seaofnodes.simple.evaluator.Evaluator;
+import com.seaofnodes.simple.node.StopNode;
+import org.junit.Test;
+
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+public class Chapter12Test {
+    @Test
+    public void testJig() {
+        Parser parser = new Parser(
+"""
+return 3.14;
+""");
+        StopNode stop = parser.parse(false).iterate(false);
+        assertEquals("return 3.14;", stop.toString());
+        assertEquals(3.14, Evaluator.evaluate(stop,  0));
+    }
+
+    @Test
+    public void testFloat() {
+        Parser parser = new Parser(
+"""
+return 3.14;
+""");
+        StopNode stop = parser.parse(false).iterate(false);
+        assertEquals("return 3.14;", stop.toString());
+        assertEquals(3.14, Evaluator.evaluate(stop,  0));
+    }
+
+    @Test
+    public void testSquareRoot() {
+        Parser parser = new Parser(
+"""
+flt guess = arg;
+while( 1 ) {
+    flt next = (arg/guess + guess)/2;
+    if( next == guess ) break;
+    guess = next;
+}
+return guess;
+""");
+        StopNode stop = parser.parse(false).iterate(false);
+        assertEquals("return Phi(Loop9,(flt)arg,(((ToFloat/Phi_guess)+Phi_guess)/2.0));", stop.toString());
+        assertEquals(3.0, Evaluator.evaluate(stop,  9));
+        assertEquals(1.414213562373095, Evaluator.evaluate(stop,  2));
+    }
+
+    @Test
+    public void testFPOps() {
+        Parser parser = new Parser(
+"""
+flt x = arg;
+return x+1==x;
+""");
+        StopNode stop = parser.parse(false).iterate(false);
+        assertEquals("return ((flt)arg==(ToFloat+1.0));", stop.toString());
+        assertEquals(0L, Evaluator.evaluate(stop, 1));
+    }
+
+}