chore(util-body-length-node): move calculateBodyLength to it's own file (#3381)

Author: trivikr

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

@@ -0,0 +1,46 @@
+import { createReadStream, lstatSync } from "fs";
+
+import { calculateBodyLength } from "./calculateBodyLength";
+
+describe(calculateBodyLength.name, () => {
+  const arrayBuffer = new ArrayBuffer(1);
+  const typedArray = new Uint8Array(1);
+  const view = new DataView(arrayBuffer);
+
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it.each([
+    [0, null],
+    [0, undefined],
+  ])("should return %s for %s", (output, input) => {
+    expect(calculateBodyLength(input)).toEqual(output);
+  });
+
+  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 DataView inputs", () => {
+    expect(calculateBodyLength(view)).toEqual(1);
+  });
+
+  it("should handle stream created using fs.createReadStream", () => {
+    const fileSize = lstatSync(__filename).size;
+    const fsReadStream = createReadStream(__filename);
+    expect(calculateBodyLength(fsReadStream)).toEqual(fileSize);
+  });
+});

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

@@ -0,0 +1,18 @@
+import { lstatSync } from "fs";
+
+export const calculateBodyLength = (body: any): number | undefined => {
+  if (!body) {
+    return 0;
+  }
+  if (typeof body === "string") {
+    return Buffer.from(body).length;
+  } else if (typeof body.byteLength === "number") {
+    // handles Uint8Array, ArrayBuffer, Buffer, and ArrayBufferView
+    return body.byteLength;
+  } else if (typeof body.size === "number") {
+    return body.size;
+  } else if (typeof body.path === "string") {
+    // handles fs readable streams
+    return lstatSync(body.path).size;
+  }
+};

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

@@ -1,18 +1 @@
-import { lstatSync } from "fs";
-
-export function calculateBodyLength(body: any): number | undefined {
-  if (!body) {
-    return 0;
-  }
-  if (typeof body === "string") {
-    return Buffer.from(body).length;
-  } else if (typeof body.byteLength === "number") {
-    // handles Uint8Array, ArrayBuffer, Buffer, and ArrayBufferView
-    return body.byteLength;
-  } else if (typeof body.size === "number") {
-    return body.size;
-  } else if (typeof body.path === "string") {
-    // handles fs readable streams
-    return lstatSync(body.path).size;
-  }
-}
+export * from "./calculateBodyLength";