adding unit tests; ci skip

test/functions.zig

@@ -0,0 +1,162 @@
+const std = @import("std");
+const root = @import("root.zig");
+const compileNzsl = root.compileNzsl;
+const case = root.case;
+
+test "Simple function calls" {
+    const allocator = std.testing.allocator;
+    const types = [_]type{ i32, u32, f32, f64 };
+
+    inline for (types) |T| {
+        const n = case.random(T);
+
+        const shader = try std.fmt.allocPrint(
+            allocator,
+            \\ [nzsl_version("1.1")]
+            \\ [feature(float64)]
+            \\ module;
+            \\ 
+            \\ struct FragOut
+            \\ {{
+            \\     [location(0)] color: vec4[{s}]
+            \\ }}
+            \\
+            \\ fn value() -> {s}
+            \\ {{
+            \\     return {d};
+            \\ }}
+            \\
+            \\ [entry(frag)]
+            \\ fn main() -> FragOut
+            \\ {{
+            \\     let output: FragOut;
+            \\     output.color = vec4[{s}](value(), value(), value(), value());
+            \\     return output;
+            \\ }}
+        ,
+            .{
+                @typeName(T),
+                @typeName(T),
+                n,
+                @typeName(T),
+            },
+        );
+        defer allocator.free(shader);
+        const code = try compileNzsl(allocator, shader);
+        defer allocator.free(code);
+        try case.expectOutput(T, 4, code, "color", &.{ n, n, n, n });
+    }
+}
+
+test "Nested function calls" {
+    const allocator = std.testing.allocator;
+    const types = [_]type{ i32, u32, f32, f64 };
+
+    inline for (types) |T| {
+        const n = case.random(T);
+
+        const shader = try std.fmt.allocPrint(
+            allocator,
+            \\ [nzsl_version("1.1")]
+            \\ [feature(float64)]
+            \\ module;
+            \\ 
+            \\ struct FragOut
+            \\ {{
+            \\     [location(0)] color: vec4[{s}]
+            \\ }}
+            \\
+            \\ fn deepValue() -> {s}
+            \\ {{
+            \\     return {d};
+            \\ }}
+            \\
+            \\ fn value() -> {s}
+            \\ {{
+            \\     return deepValue();
+            \\ }}
+            \\
+            \\ [entry(frag)]
+            \\ fn main() -> FragOut
+            \\ {{
+            \\     let output: FragOut;
+            \\     output.color = vec4[{s}](value(), value(), value(), value());
+            \\     return output;
+            \\ }}
+        ,
+            .{
+                @typeName(T),
+                @typeName(T),
+                n,
+                @typeName(T),
+                @typeName(T),
+            },
+        );
+        defer allocator.free(shader);
+        const code = try compileNzsl(allocator, shader);
+        defer allocator.free(code);
+        try case.expectOutput(T, 4, code, "color", &.{ n, n, n, n });
+    }
+}
+
+test "Recursive function calls" {
+    const allocator = std.testing.allocator;
+    const types = [_]type{ i32, u32, f32, f64 };
+
+    inline for (types) |T| {
+        const iterations = 10;
+
+        const fib = struct {
+            fn onacci(n: T) T {
+                if (n <= 0) return n;
+                return onacci(n - 1) + onacci(n - 2);
+            }
+        };
+        const expected = fib.onacci(iterations);
+
+        const shader = try std.fmt.allocPrint(
+            allocator,
+            \\ [nzsl_version("1.1")]
+            \\ [feature(float64)]
+            \\ module;
+            \\ 
+            \\ struct FragOut
+            \\ {{
+            \\     [location(0)] color: vec4[{s}]
+            \\ }}
+            \\
+            \\ fn fibonacci(n: {s}) -> {s}
+            \\ {{
+            \\     if (n <= {s}(1)) return n;
+            \\     return fibonacci(n - {s}(1)) + fibonacci(n - {s}(2));
+            \\ }}
+            \\
+            \\ [entry(frag)]
+            \\ fn main() -> FragOut
+            \\ {{
+            \\     let output: FragOut;
+            \\     output.color = vec4[{s}](fibonacci({d}), fibonacci({d}), fibonacci({d}), fibonacci({d}));
+            \\     return output;
+            \\ }}
+        ,
+            .{
+                @typeName(T),
+                @typeName(T),
+                @typeName(T),
+                @typeName(T),
+                @typeName(T),
+                @typeName(T),
+                @typeName(T),
+                iterations,
+                iterations,
+                iterations,
+                iterations,
+            },
+        );
+        defer allocator.free(shader);
+        std.debug.print("{s}\n\n", .{shader});
+        const code = try compileNzsl(allocator, shader);
+        defer allocator.free(code);
+        try case.expectOutput(T, 4, code, "color", &.{ expected, expected, expected, expected });
+    }
+}

test/root.zig

@@ -59,5 +59,6 @@ test {
     std.testing.refAllDecls(@import("basics.zig"));
     std.testing.refAllDecls(@import("branching.zig"));
     std.testing.refAllDecls(@import("casts.zig"));
+    std.testing.refAllDecls(@import("functions.zig"));
     std.testing.refAllDecls(@import("maths.zig"));
 }