From a1b78ec441aea70ae7494ca2b2925720d3f4ab3c Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Fri, 12 Jun 2026 16:19:50 +0100
Subject: Add Java constructor

---
 .../compiler/output/lang/java/JavaWriterTests.java | 91 ++++++++++++++++++++++
 1 file changed, 91 insertions(+)

(limited to 'src/test/java/org')

diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java
index 426b1c1..0e24939 100644
--- a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java
@@ -577,6 +577,97 @@ public class JavaWriterTests {
         ));
     }
 
+    @Test
+    public void emptyConstructor() throws IOException {
+        var java = new JavaConstructorDeclaration(
+            "Rectangle",
+            JavaVisibility.PUBLIC,
+            List.of(),
+            JavaBlock.EMPTY
+        );
+
+        var string = write(writer -> writer.writeClassBodyDeclaration(java));
+
+        assertThat(string, equalTo("""
+            public Rectangle() {
+            }"""
+        ));
+    }
+
+    @Test
+    public void publicConstructor() throws IOException {
+        var java = new JavaConstructorDeclaration(
+            "Rectangle",
+            JavaVisibility.PUBLIC,
+            List.of(),
+            JavaBlock.EMPTY
+        );
+
+        var string = write(writer -> writer.writeClassBodyDeclaration(java));
+
+        assertThat(string, equalTo("""
+            public Rectangle() {
+            }"""
+        ));
+    }
+
+    @Test
+    public void privateConstructor() throws IOException {
+        var java = new JavaConstructorDeclaration(
+            "Rectangle",
+            JavaVisibility.PRIVATE,
+            List.of(),
+            JavaBlock.EMPTY
+        );
+
+        var string = write(writer -> writer.writeClassBodyDeclaration(java));
+
+        assertThat(string, equalTo("""
+            private Rectangle() {
+            }"""
+        ));
+    }
+
+    @Test
+    public void constructorWithParams() throws IOException {
+        var java = new JavaConstructorDeclaration(
+            "Rectangle",
+            JavaVisibility.PUBLIC,
+            List.of(
+                new JavaParam(JavaTypeRef.INT, "b"),
+                new JavaParam(JavaTypeRef.LONG, "c")
+            ),
+            JavaBlock.EMPTY
+        );
+
+        var string = write(writer -> writer.writeClassBodyDeclaration(java));
+
+        assertThat(string, equalTo("""
+            public Rectangle(int b, long c) {
+            }"""
+        ));
+    }
+
+    @Test
+    public void constructorWithBody() throws IOException {
+        var java = new JavaConstructorDeclaration(
+            "Rectangle",
+            JavaVisibility.PUBLIC,
+            List.of(),
+            new JavaBlock(List.of(
+                new JavaReturn(new JavaIntegerLiteral(42))
+            ))
+        );
+
+        var string = write(writer -> writer.writeClassBodyDeclaration(java));
+
+        assertThat(string, equalTo("""
+            public Rectangle() {
+                return 42;
+            }"""
+        ));
+    }
+
     @Test
     public void block() throws IOException {
         var java = new JavaBlock(List.of(
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