chore(util-body-length-browser): move calculateBodyLength to it's own file (#3382)

Author: trivikr

packages/util-body-length-browser/jest.config.js

@@ -2,4 +2,5 @@ const base = require("../../jest.config.base.js");
 
 module.exports = {
   ...base,
+  testEnvironment: "jsdom",
 };

packages/util-body-length-browser/src/calculateBodyLength.spec.ts

@@ -0,0 +1,36 @@
+import { calculateBodyLength } from "./calculateBodyLength";
+
+const arrayBuffer = new ArrayBuffer(1);
+const typedArray = new Uint8Array(1);
+
+describe(calculateBodyLength.name, () => {
+  it("should handle string inputs", () => {
+    expect(calculateBodyLength("foo")).toEqual(3);
+  });
+
+  it("should handle string inputs with multi-byte characters", () => {
+    expect(calculateBodyLength("2。")).toEqual(4);
+  });
+
+  it("should handle inputs with byteLengths", () => {
+    expect(calculateBodyLength(arrayBuffer)).toEqual(1);
+  });
+
+  it("should handle TypedArray inputs", () => {
+    expect(calculateBodyLength(typedArray)).toEqual(1);
+  });
+
+  it("should handle File object", () => {
+    // Mock File Object https://developer.mozilla.org/en-US/docs/Web/API/File/File#example
+    const lastModifiedDate = new Date();
+    const mockFileObject = {
+      lastModified: lastModifiedDate.getTime(),
+      lastModifiedDate,
+      name: "foo.txt",
+      size: 3,
+      type: "text/plain",
+      webkitRelativePath: "",
+    };
+    expect(calculateBodyLength(mockFileObject)).toEqual(mockFileObject.size);
+  });
+});

packages/util-body-length-browser/src/calculateBodyLength.ts

@@ -0,0 +1,19 @@
+export const calculateBodyLength = (body: any): number | undefined => {
+  if (typeof body === "string") {
+    let len = body.length;
+
+    for (let i = len - 1; i >= 0; i--) {
+      const code = body.charCodeAt(i);
+      if (code > 0x7f && code <= 0x7ff) len++;
+      else if (code > 0x7ff && code <= 0xffff) len += 2;
+    }
+
+    return len;
+  } else if (typeof body.byteLength === "number") {
+    // handles Uint8Array, ArrayBuffer, Buffer, and ArrayBufferView
+    return body.byteLength;
+  } else if (typeof body.size === "number") {
+    // handles browser File object
+    return body.size;
+  }
+};

packages/util-body-length-browser/src/index.spec.ts

@@ -1,19 +1 @@
-export function calculateBodyLength(body: any): number | undefined {
-  if (typeof body === "string") {
-    let len = body.length;
-
-    for (let i = len - 1; i >= 0; i--) {
-      const code = body.charCodeAt(i);
-      if (code > 0x7f && code <= 0x7ff) len++;
-      else if (code > 0x7ff && code <= 0xffff) len += 2;
-    }
-
-    return len;
-  } else if (typeof body.byteLength === "number") {
-    // handles Uint8Array, ArrayBuffer, Buffer, and ArrayBufferView
-    return body.byteLength;
-  } else if (typeof body.size === "number") {
-    // handles browser File object
-    return body.size;
-  }
-}
+export * from "./calculateBodyLength";