first release

.github/workflows/deno.yml

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+name: Deno
+
+on:
+  push:
+    branches: ["main"]
+    tags: 
+      - '*'
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Setup repo
+        uses: actions/checkout@v3
+
+      - name: Setup Deno
+        # uses: denoland/setup-deno@v1
+        uses: denoland/setup-deno@61fe2df320078202e33d7d5ad347e7dcfa0e8f31  # v1.1.2
+        with:
+          deno-version: v1.x
+
+      - name: Verify formatting
+        run: deno fmt --check
+
+      - name: Run linter
+        run: deno lint
+
+      - name: Run tests
+        run: deno test -A
+
+  npm_publish:
+    name: Publish to npm
+    needs: test
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup repo
+        uses: actions/checkout@v3
+
+      - name: Get tag version
+        id: get_tag_version
+        run: echo TAG_VERSION=${GITHUB_REF/refs\/tags\//} >> $GITHUB_OUTPUT
+
+      - name: Setup Deno
+        # uses: denoland/setup-deno@v1
+        uses: denoland/setup-deno@61fe2df320078202e33d7d5ad347e7dcfa0e8f31  # v1.1.2
+        with:
+          deno-version: v1.x
+
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: '18.x'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: npm build
+        run: deno task build ${{steps.get_tag_version.outputs.TAG_VERSION}}
+
+      - name: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: npm publish --access=public ./npm

.gitignore

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+npm

.vscode/settings.json

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+{
+  "deno.enable": true,
+  "editor.defaultFormatter": "denoland.vscode-deno"
+}

README.md

@@ -1 +1,41 @@
-# file-reader-promise
+# file_reader_promise
+
+Promise-based [`FileReader`](https://developer.mozilla.org/docs/Web/API/FileReader) implementation.
+
+## Installation
+
+node
+
+```sh
+npm install @myrear/file_reader_promise
+```
+
+deno
+
+```ts
+import {
+  FileReader,
+  readAs,
+} from 'https://deno.land/x/file_reader_promise/mod.ts'
+```
+
+## Usage
+
+This library provides 2 modules:
+
+- [`readAs`](#readas)
+- [`FileReader`](#filereader): Thin wrapper class for the web standard [`FileReader`](https://developer.mozilla.org/docs/Web/API/FileReader) class
+
+### `readAs`
+
+```ts
+const result: string = await readAs(reader, file, 'DataURL')
+const result: ArrayBuffer = await readAs(reader, file, 'ArrayBuffer')
+```
+
+### `FileReader`
+
+```ts
+const result: string = await new FileReader().readAsDataURL(file)
+const result: ArrayBuffer = await new FileReader().readAsArrayBuffer(file)
+```

__tests__/FileReader.test.ts

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+import './setup.ts'
+import { FileReader } from '../src/FileReader.ts'
+import { assertEquals } from 'std/assert/assert_equals.ts'
+import { assertInstanceOf } from 'std/assert/assert_instance_of.ts'
+
+Deno.test('read blob', async (t) => {
+  const blob = new Blob(['foo'], { type: 'text/plain' })
+
+  await t.step('as `ArrayBuffer`', async () => {
+    const reader = new FileReader()
+    const result = await reader.readAsArrayBuffer(blob)
+
+    assertEquals(result, reader.result)
+    assertInstanceOf(result, ArrayBuffer)
+  })
+
+  await t.step('as `BinaryString`', async () => {
+    const reader = new FileReader()
+    const result = await reader.readAsBinaryString(blob)
+
+    assertEquals(result, reader.result)
+    assertEquals(result, 'foo')
+  })
+
+  await t.step('as `DataURL`', async () => {
+    const reader = new FileReader()
+    const result = await reader.readAsDataURL(blob)
+
+    assertEquals(result, reader.result)
+    assertEquals(result, 'data:text/plain;base64,Zm9v')
+  })
+
+  await t.step('as `Text` with encoding utf-8', async () => {
+    const reader = new FileReader()
+    const result = await reader.readAsText(blob, 'utf-8')
+
+    assertEquals(result, reader.result)
+    assertEquals(result, 'foo')
+  })
+})

__tests__/readAs.test.ts

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+import './setup.ts'
+import { assertEquals, assertInstanceOf } from 'std/assert/mod.ts'
+import { assertSpyCall, spy } from 'std/testing/mock.ts'
+import { readAs } from '../src/readAs.ts'
+
+Deno.test('read blob', async (t) => {
+  const blob = new Blob(['foo'], { type: 'text/plain' })
+
+  await t.step('as `ArrayBuffer`', async () => {
+    const reader = new FileReader()
+    const readAsArrayBufferSpy = spy(reader, 'readAsArrayBuffer')
+    const result = await readAs(reader, blob, 'ArrayBuffer')
+
+    assertEquals(result, reader.result)
+    assertInstanceOf(result, ArrayBuffer)
+    assertSpyCall(readAsArrayBufferSpy, 0, {
+      self: reader,
+      args: [blob, undefined],
+    })
+  })
+
+  await t.step('as `BinaryString`', async () => {
+    const reader = new FileReader()
+    const readAsBinaryStringSpy = spy(reader, 'readAsBinaryString')
+    const result = await readAs(reader, blob, 'BinaryString')
+
+    assertEquals(result, reader.result)
+    assertEquals(result, 'foo')
+    assertSpyCall(readAsBinaryStringSpy, 0, {
+      self: reader,
+      args: [blob, undefined],
+    })
+  })
+
+  await t.step('as `DataURL`', async () => {
+    const reader = new FileReader()
+    const readAsDataURLSpy = spy(reader, 'readAsDataURL')
+    const result = await readAs(reader, blob, 'DataURL')
+
+    assertEquals(result, reader.result)
+    assertEquals(result, 'data:text/plain;base64,Zm9v')
+    assertSpyCall(readAsDataURLSpy, 0, {
+      self: reader,
+      args: [blob, undefined],
+    })
+  })
+
+  await t.step('as `Text` with encoding utf-8', async () => {
+    const reader = new FileReader()
+    const readAsTextSpy = spy(reader, 'readAsText')
+    const result = await readAs(reader, blob, 'Text', 'utf-8')
+
+    assertEquals(result, reader.result)
+    assertEquals(typeof result, 'string')
+    assertSpyCall(readAsTextSpy, 0, {
+      self: reader,
+      args: [blob, 'utf-8'],
+    })
+  })
+})

__tests__/setup.ts

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+import { JSDOM } from 'jsdom'
+import { isNode } from 'which_runtime/mod.ts'
+
+if (isNode) {
+  const { window: { Blob, FileReader } } = new JSDOM()
+  globalThis.Blob = Blob
+  globalThis.FileReader = FileReader
+}

deno.jsonc

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+{
+  "tasks": {
+    "build": "deno run -A npm_build.ts"
+  },
+  "fmt": {
+    "semiColons": false,
+    "singleQuote": true,
+    "exclude": ["*.md"]
+  },
+  "exclude": ["npm/**/*"],
+  "imports": {
+    "dnt/": "https://deno.land/x/dnt@0.38.1/",
+    "std/": "https://deno.land/std@0.199.0/",
+    "jsdom": "https://esm.sh/jsdom@22.1.0",
+    "which_runtime/": "https://deno.land/x/which_runtime@0.2.0/"
+  }
+}