From a861b7d160737acb60913d2ff7ed316f19af9066 Mon Sep 17 00:00:00 2001
From: Luuk de Gram <luuk@degram.dev>
Date: Sat, 31 Jul 2021 16:39:48 +0200
Subject: [PATCH] wasm: Test cases for optionals

---
 test/stage2/wasm.zig | 54 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/test/stage2/wasm.zig b/test/stage2/wasm.zig
index b0099c392c..a9f7984893 100644
--- a/test/stage2/wasm.zig
+++ b/test/stage2/wasm.zig
@@ -644,4 +644,58 @@ pub fn addCases(ctx: *TestContext) !void {
             \\}
         , "5\n");
     }
+
+    {
+        var case = ctx.exe("wasm optionals", wasi);
+
+        case.addCompareOutput(
+            \\pub export fn _start() u32 {
+            \\    var x: ?u32 = 5;
+            \\    var y: u32 = 0;
+            \\    if (x) |val| {
+            \\        y = val;
+            \\    }
+            \\    return y;
+            \\}
+        , "5\n");
+
+        case.addCompareOutput(
+            \\pub export fn _start() u32 {
+            \\    var x: ?u32 = null;
+            \\    var y: u32 = 0;
+            \\    if (x) |val| {
+            \\        y = val;
+            \\    }
+            \\    return y;
+            \\}
+        , "0\n");
+
+        case.addCompareOutput(
+            \\pub export fn _start() u32 {
+            \\    var x: ?u32 = 5;
+            \\    return x.?;
+            \\}
+        , "5\n");
+
+        case.addCompareOutput(
+            \\pub export fn _start() u32 {
+            \\    var x: u32 = 5;
+            \\    var y: ?u32 = x;
+            \\    return y.?;
+            \\}
+        , "5\n");
+
+        case.addCompareOutput(
+            \\pub export fn _start() u32 {
+            \\    var val: ?u32 = 5;
+            \\    while (val) |*v| {
+            \\        v.* -= 1;
+            \\        if (v.* == 2) {
+            \\            val = null;
+            \\        }
+            \\    }
+            \\    return 0;
+            \\}
+        , "0\n");
+    }
 }