console: fix printing of Response(Bun.file()) (#20933)

src/bun.js/webcore/Body.zig

@@ -3,7 +3,7 @@ const Body = @This();
 
 value: Value, // = Value.empty,
 
-pub inline fn len(this: *const Body) Blob.SizeType {
+pub fn len(this: *Body) Blob.SizeType {
     return this.value.size();
 }
 
@@ -366,9 +366,9 @@ pub const Value = union(Tag) {
         }
     }
 
-    pub fn size(this: *const Value) Blob.SizeType {
+    pub fn size(this: *Value) Blob.SizeType {
         return switch (this.*) {
-            .Blob => this.Blob.size,
+            .Blob => @truncate(this.Blob.getSizeForBindings()),
             .InternalBlob => @as(Blob.SizeType, @truncate(this.InternalBlob.sliceConst().len)),
             .WTFStringImpl => @as(Blob.SizeType, @truncate(this.WTFStringImpl.utf8ByteLength())),
             .Locked => this.Locked.sizeHint(),

test/js/web/fetch/response.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, test } from "bun:test";
+import { sep } from "node:path";
 
 test("zero args returns an otherwise empty 200 response", () => {
   const response = new Response();
@@ -44,3 +45,22 @@ describe("2-arg form", () => {
     expect(response.statusText).toBe("");
   });
 });
+
+test("print size", () => {
+  expect(Bun.inspect(new Response(Bun.file(import.meta.filename)))).toMatchInlineSnapshot(`
+    "Response (1.81 KB) {
+      ok: true,
+      url: "",
+      status: 200,
+      statusText: "",
+      headers: Headers {
+        "content-type": "text/javascript;charset=utf-8",
+      },
+      redirected: false,
+      bodyUsed: false,
+      FileRef ("${import.meta.dir}${sep}response.test.ts") {
+        type: "text/javascript;charset=utf-8"
+      }
+    }"
+  `);
+});