Simplify headers assignment, fix tests

src/jetzig/http/Headers.zig

@@ -15,7 +15,7 @@ pub fn init(allocator: std.mem.Allocator) Self {
 }
 
 pub fn deinit(self: *Self) void {
-    self.headers.deinit();
+    self.headers.deinit(self.allocator);
 }
 
 // Gets the first value for a given header identified by `name`.
@@ -36,6 +36,18 @@ pub fn iterator(self: *Self) Iterator {
     return Iterator{ .headers = self.headers };
 }
 
+/// Returns an array of `std.http.Header`, can be used to set response headers directly.
+/// Caller owns memory.
+pub fn stdHeaders(self: *Self) !std.ArrayListUnmanaged(std.http.Header) {
+    var array = try std.ArrayListUnmanaged(std.http.Header).initCapacity(self.allocator, max_headers);
+
+    var it = self.iterator();
+    while (it.next()) |header| {
+        array.appendAssumeCapacity(.{ .name = header.name, .value = header.value });
+    }
+    return array;
+}
+
 /// Iterates through stored headers yielidng a `Header` on each call to `next()`
 const Iterator = struct {
     headers: HeadersArray,
@@ -58,14 +70,44 @@ const Iterator = struct {
     }
 };
 
-test {
+test "append" {
     const allocator = std.testing.allocator;
-    var headers = std.http.Headers.init(allocator);
+    var headers = Self.init(allocator);
     defer headers.deinit();
     try headers.append("foo", "bar");
-    var jetzig_headers = Self.init(allocator, headers);
-    try std.testing.expectEqualStrings(
-        headers.getFirstValue("foo").?,
-        jetzig_headers.getFirstValue("foo").?,
-    );
+    try std.testing.expectEqualStrings(headers.getFirstValue("foo").?, "bar");
+}
+
+test "iterator" {
+    const allocator = std.testing.allocator;
+    var headers = Self.init(allocator);
+    defer headers.deinit();
+
+    try headers.append("foo", "bar");
+
+    var it = headers.iterator();
+    while (it.next()) |header| {
+        try std.testing.expectEqualStrings("foo", header.name);
+        try std.testing.expectEqualStrings("bar", header.value);
+        break;
+    } else {
+        try std.testing.expect(false);
+    }
+}
+
+test "stdHeaders" {
+    const allocator = std.testing.allocator;
+    var headers = Self.init(allocator);
+    defer headers.deinit();
+
+    try headers.append("foo", "bar");
+    try headers.append("baz", "qux");
+
+    var std_headers = try headers.stdHeaders();
+    defer std_headers.deinit(allocator);
+
+    try std.testing.expectEqualStrings("foo", std_headers.items[0].name);
+    try std.testing.expectEqualStrings("bar", std_headers.items[0].value);
+    try std.testing.expectEqualStrings("baz", std_headers.items[1].name);
+    try std.testing.expectEqualStrings("qux", std_headers.items[1].value);
 }

src/jetzig/http/Request.zig

@@ -137,12 +137,8 @@ pub fn respond(self: *Self) !void {
         try self.response.headers.append("Set-Cookie", header);
     }
 
-    // TODO: Move to jetzig.http.Response.stdHeaders()
-    var std_response_headers = std.ArrayList(std.http.Header).init(self.allocator);
-    var headers_it = self.response.headers.iterator();
-    while (headers_it.next()) |header| try std_response_headers.append(
-        .{ .name = header.name, .value = header.value },
-    );
+    var std_response_headers = try self.response.headers.stdHeaders();
+    defer std_response_headers.deinit(self.allocator);
 
     try self.std_http_request.respond(
         self.response.content,