From 7e475ddf746cb8f97563c605a4a5471c4dd7e880 Mon Sep 17 00:00:00 2001
From: Alexander O'Mara <me@alexomara.com>
Date: Thu, 14 Nov 2024 00:02:46 -0500
Subject: [PATCH] Test floats

---
 member/f32.test.ts | 79 ++++++++++++++++++++++++++++++++++++++++++++++
 member/f64.test.ts | 75 +++++++++++++++++++++++++++++++++++++++++++
 member/f64.ts      |  2 +-
 3 files changed, 155 insertions(+), 1 deletion(-)
 create mode 100644 member/f32.test.ts
 create mode 100644 member/f64.test.ts

diff --git a/member/f32.test.ts b/member/f32.test.ts
new file mode 100644
index 0000000..3e1d542
--- /dev/null
+++ b/member/f32.test.ts
@@ -0,0 +1,79 @@
+import { assertEquals } from '@std/assert';
+
+import { Struct } from '../struct.ts';
+import { memberF32 } from './f32.ts';
+
+Deno.test('memberF32', () => {
+	const v = new DataView(new ArrayBuffer(4));
+	for (
+		const f64 of [
+			0,
+			1,
+			-1,
+			Math.PI,
+			-Math.PI,
+			Math.E,
+			-Math.E,
+			Number.EPSILON,
+			-Number.EPSILON,
+			Number.MAX_SAFE_INTEGER,
+			Number.MIN_SAFE_INTEGER,
+			Number.MAX_VALUE,
+			Number.MIN_VALUE,
+			Infinity,
+			-Infinity,
+			NaN,
+		]
+	) {
+		v.setFloat32(0, f64, true);
+		const f32 = v.getFloat32(0, true);
+
+		class Test extends Struct {
+			declare public readonly ['constructor']: typeof Test;
+
+			declare public alpha: number;
+
+			declare public beta: number;
+
+			declare public gamma: number;
+
+			public static override readonly BYTE_LENGTH: number = ((o) => {
+				o += memberF32(this, o, 'alpha', true);
+				o += memberF32(this, o, 'beta', false);
+				o += memberF32(this, o, 'gamma');
+				return o;
+			})(super.BYTE_LENGTH);
+		}
+
+		assertEquals(Test.BYTE_LENGTH, 12);
+
+		const data = new Uint8Array(Test.BYTE_LENGTH);
+		const view = new DataView(data.buffer);
+		{
+			const test = new Test(data.buffer, 0, false);
+			test.alpha = f32;
+			test.beta = f32;
+			test.gamma = f32;
+
+			assertEquals(test.alpha, f32);
+			assertEquals(test.beta, f32);
+			assertEquals(test.gamma, f32);
+			assertEquals(view.getFloat32(0, true), f32);
+			assertEquals(view.getFloat32(4, false), f32);
+			assertEquals(view.getFloat32(8, false), f32);
+		}
+		{
+			const test = new Test(data.buffer, 0, true);
+			test.alpha = f32;
+			test.beta = f32;
+			test.gamma = f32;
+
+			assertEquals(test.alpha, f32);
+			assertEquals(test.beta, f32);
+			assertEquals(test.gamma, f32);
+			assertEquals(view.getFloat32(0, true), f32);
+			assertEquals(view.getFloat32(4, false), f32);
+			assertEquals(view.getFloat32(8, true), f32);
+		}
+	}
+});
diff --git a/member/f64.test.ts b/member/f64.test.ts
new file mode 100644
index 0000000..bbb803f
--- /dev/null
+++ b/member/f64.test.ts
@@ -0,0 +1,75 @@
+import { assertEquals } from '@std/assert';
+
+import { Struct } from '../struct.ts';
+import { memberF64 } from './f64.ts';
+
+Deno.test('memberF64', () => {
+	for (
+		const f64 of [
+			0,
+			1,
+			-1,
+			Math.PI,
+			-Math.PI,
+			Math.E,
+			-Math.E,
+			Number.EPSILON,
+			-Number.EPSILON,
+			Number.MAX_SAFE_INTEGER,
+			Number.MIN_SAFE_INTEGER,
+			Number.MAX_VALUE,
+			Number.MIN_VALUE,
+			Infinity,
+			-Infinity,
+			NaN,
+		]
+	) {
+		class Test extends Struct {
+			declare public readonly ['constructor']: typeof Test;
+
+			declare public alpha: number;
+
+			declare public beta: number;
+
+			declare public gamma: number;
+
+			public static override readonly BYTE_LENGTH: number = ((o) => {
+				o += memberF64(this, o, 'alpha', true);
+				o += memberF64(this, o, 'beta', false);
+				o += memberF64(this, o, 'gamma');
+				return o;
+			})(super.BYTE_LENGTH);
+		}
+
+		assertEquals(Test.BYTE_LENGTH, 24);
+
+		const data = new Uint8Array(Test.BYTE_LENGTH);
+		const view = new DataView(data.buffer);
+		{
+			const test = new Test(data.buffer, 0, false);
+			test.alpha = f64;
+			test.beta = f64;
+			test.gamma = f64;
+
+			assertEquals(test.alpha, f64);
+			assertEquals(test.beta, f64);
+			assertEquals(test.gamma, f64);
+			assertEquals(view.getFloat64(0, true), f64);
+			assertEquals(view.getFloat64(8, false), f64);
+			assertEquals(view.getFloat64(16, false), f64);
+		}
+		{
+			const test = new Test(data.buffer, 0, true);
+			test.alpha = f64;
+			test.beta = f64;
+			test.gamma = f64;
+
+			assertEquals(test.alpha, f64);
+			assertEquals(test.beta, f64);
+			assertEquals(test.gamma, f64);
+			assertEquals(view.getFloat64(0, true), f64);
+			assertEquals(view.getFloat64(8, false), f64);
+			assertEquals(view.getFloat64(16, true), f64);
+		}
+	}
+});
diff --git a/member/f64.ts b/member/f64.ts
index 7c7f640..4c05460 100644
--- a/member/f64.ts
+++ b/member/f64.ts
@@ -31,5 +31,5 @@ export function memberF64<T extends typeof Struct>(
 			);
 		},
 	});
-	return 4;
+	return 8;
 }