chore: convert bump script to js (#15820)

spec/version-bump-spec.js

@@ -0,0 +1,80 @@
+const { expect } = require('chai')
+const { nextVersion } = require('../script/bump-version')
+
+describe('bump-version script', () => {
+  const nightlyPattern = /[0-9.]*(-nightly.(\d{4})(\d{2})(\d{2}))$/g
+  const betaPattern = /[0-9.]*(-beta[0-9.]*)/g
+
+  it('bumps to nightly from stable', async () => {
+    const version = 'v2.0.0'
+    const next = await nextVersion('nightly', version)
+    const matches = next.match(nightlyPattern)
+    expect(matches).to.have.lengthOf(1)
+  })
+
+  it('bumps to nightly from beta', async () => {
+    const version = 'v2.0.0-beta.1'
+    const next = await nextVersion('nightly', version)
+    const matches = next.match(nightlyPattern)
+    expect(matches).to.have.lengthOf(1)
+  })
+
+  it('bumps to nightly from nightly', async () => {
+    const version = 'v2.0.0-nightly.19950901'
+    const next = await nextVersion('nightly', version)
+    const matches = next.match(nightlyPattern)
+    expect(matches).to.have.lengthOf(1)
+  })
+
+  it('throws error when bumping to beta from stable', () => {
+    const version = 'v2.0.0'
+    return expect(
+      nextVersion('beta', version)
+    ).to.be.rejectedWith('Cannot bump to beta from stable.')
+  })
+
+  it('bumps to beta from nightly', async () => {
+    const version = 'v2.0.0-nightly.19950901'
+    const next = await nextVersion('beta', version)
+    const matches = next.match(betaPattern)
+    expect(matches).to.have.lengthOf(1)
+  })
+
+  it('bumps to beta from beta', async () => {
+    const version = 'v2.0.0-beta.8'
+    const next = await nextVersion('beta', version)
+    expect(next).to.equal('2.0.0-beta.9')
+  })
+
+  it('bumps to stable from beta', async () => {
+    const version = 'v2.0.0-beta.1'
+    const next = await nextVersion('stable', version)
+    expect(next).to.equal('2.0.0')
+  })
+
+  it('bumps to stable from stable', async () => {
+    const version = 'v2.0.0'
+    const next = await nextVersion('stable', version)
+    expect(next).to.equal('2.0.1')
+  })
+
+  it('bumps to stable from nightly', async () => {
+    const version = 'v2.0.0-nightly.19950901'
+    const next = await nextVersion('stable', version)
+    expect(next).to.equal('2.0.0')
+  })
+
+  it('throws on an invalid version', () => {
+    const version = 'vI.AM.INVALID'
+    return expect(
+      nextVersion('beta', version)
+    ).to.be.rejectedWith(`Invalid current version: ${version}`)
+  })
+
+  it('throws on an invalid bump type', () => {
+    const version = 'v2.0.0'
+    return expect(
+      nextVersion('WRONG', version)
+    ).to.be.rejectedWith('Invalid bump type.')
+  })
+})