Improve Test Coverage

test/api/remove.ts

@@ -0,0 +1,70 @@
+import * as NodeID3 from '../../index'
+import assert = require('assert')
+import chai = require('chai')
+import * as fs from 'fs'
+
+describe('NodeID3 API', function () {
+    describe('#removeTags()', function() {
+        const nonExistingFilepath = './hopefully-does-not-exist.mp3'
+        it('sync not existing filepath', function() {
+            chai.assert.isFalse(fs.existsSync(nonExistingFilepath))
+            chai.assert.instanceOf(
+                NodeID3.removeTags(nonExistingFilepath), Error
+            )
+        })
+        it('async not existing filepath', function() {
+            chai.assert.isFalse(fs.existsSync(nonExistingFilepath))
+            NodeID3.removeTags(nonExistingFilepath, function(err) {
+                if(!(err instanceof Error)) {
+                    assert.fail("No error thrown on non-existing filepath")
+                }
+            })
+        })
+
+        const titleTag = {
+            title: "abc"
+        } satisfies NodeID3.WriteTags
+        const filepath = './testfile.mp3'
+
+        describe('valid buffer', function() {
+            const prefixBuffer = Buffer.from([0x01, 0x02, 0x03])
+            const postfixBuffer = Buffer.from([0x04, 0x05, 0x06])
+            const buffer = Buffer.concat([
+                prefixBuffer,
+                NodeID3.create(titleTag),
+                postfixBuffer
+            ])
+            const bufferAfterRemove = Buffer.concat([
+                prefixBuffer,
+                postfixBuffer
+            ])
+
+            beforeEach(function() {
+                fs.writeFileSync(filepath, buffer)
+            })
+
+            afterEach(function() {
+                fs.unlinkSync(filepath)
+            })
+
+            it('sync remove tags from file', function() {
+                NodeID3.removeTags(filepath)
+                assert.deepStrictEqual(
+                    fs.readFileSync(filepath),
+                    bufferAfterRemove
+                )
+            })
+
+            it('async remove tags from file', function(done) {
+                NodeID3.removeTags(filepath, (err) => {
+                    assert.equal(err, null)
+                    assert.deepStrictEqual(
+                        fs.readFileSync(filepath),
+                        bufferAfterRemove
+                    )
+                    done()
+                })
+            })
+        })
+    })
+})