From 67cfee13acaea27b5d4daf5b58ade49d9a14363b Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 2 Feb 2025 19:57:08 +0000
Subject: Generate Shid instructions for int multiply

---
 .../org/shedlang/compiler/ast/typed/Typed.java     | 12 ++++++++++
 .../compiler/shid/ShidCodeGenIntMultiplyTests.java | 27 ++++++++++++++++++++++
 .../compiler/shid/instructions/ShidMatchers.java   |  4 ++++
 3 files changed, 43 insertions(+)
 create mode 100644 src/test/java/org/shedlang/compiler/shid/ShidCodeGenIntMultiplyTests.java

(limited to 'src/test/java')

diff --git a/src/test/java/org/shedlang/compiler/ast/typed/Typed.java b/src/test/java/org/shedlang/compiler/ast/typed/Typed.java
index 6c058686..cd65a2c9 100644
--- a/src/test/java/org/shedlang/compiler/ast/typed/Typed.java
+++ b/src/test/java/org/shedlang/compiler/ast/typed/Typed.java
@@ -189,6 +189,18 @@ public class Typed {
         return new TypedIntLiteralNode(BigInteger.valueOf(value), Sources.NULL);
     }
 
+    public static TypedBinaryOperationNode intMultiply(
+        TypedExpressionNode left,
+        TypedExpressionNode right
+    ) {
+        return new TypedBinaryOperationNode(
+            TypedBinaryOperator.INT_MULTIPLY,
+            left,
+            right,
+            Sources.NULL
+        );
+    }
+
     public static TypedBinaryOperationNode intNotEqual(
         TypedExpressionNode left,
         TypedExpressionNode right
diff --git a/src/test/java/org/shedlang/compiler/shid/ShidCodeGenIntMultiplyTests.java b/src/test/java/org/shedlang/compiler/shid/ShidCodeGenIntMultiplyTests.java
new file mode 100644
index 00000000..41b3ed01
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/shid/ShidCodeGenIntMultiplyTests.java
@@ -0,0 +1,27 @@
+package org.shedlang.compiler.shid;
+
+import org.junit.jupiter.api.Test;
+import org.shedlang.compiler.ast.typed.Typed;
+
+import static org.shedlang.compiler.shid.instructions.ShidMatchers.*;
+import static org.zwobble.precisely.AssertThat.assertThat;
+import static org.zwobble.precisely.Matchers.isSequence;
+
+public class ShidCodeGenIntMultiplyTests {
+    @Test
+    public void intMultiplyIsCompiledToIntMultiplyInstruction() {
+        var node = Typed.intMultiply(
+            Typed.intLiteral(42),
+            Typed.intLiteral(47)
+        );
+        var context = ShidCodeGen.Context.EMPTY;
+
+        var result = ShidCodeGen.compileExpression(node, context);
+
+        assertThat(result.instructions(), isSequence(
+            isShidPushInt(42),
+            isShidPushInt(47),
+            isShidIntMultiply()
+        ));
+    }
+}
diff --git a/src/test/java/org/shedlang/compiler/shid/instructions/ShidMatchers.java b/src/test/java/org/shedlang/compiler/shid/instructions/ShidMatchers.java
index 328d3311..715b0b42 100644
--- a/src/test/java/org/shedlang/compiler/shid/instructions/ShidMatchers.java
+++ b/src/test/java/org/shedlang/compiler/shid/instructions/ShidMatchers.java
@@ -111,6 +111,10 @@ public class ShidMatchers {
         return instanceOf(ShidIntLessThanOrEqual.class);
     }
 
+    public static Matcher<ShidInstruction> isShidIntMultiply() {
+        return instanceOf(ShidIntMultiply.class);
+    }
+
     public static Matcher<ShidInstruction> isShidIntNotEqual() {
         return instanceOf(ShidIntNotEqual.class);
     }
-- 
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