// Unit test helpers: render pass/diff + jump to source

var testFailures = []

var assertEqual = (actual, expected) => {

// FLAWED quick-and-dirty equality.

// TODO: import expect from 'https://unpkg.com/expect/build/index.js'

if (JSON.stringify(actual) !== JSON.stringify(expected)) {

testFailures.push(html`<li style=${'list-style-type: "≠"'}>

Actual: <code>${JSON.stringify(actual, null, 2)}</code><br/>

Expected: <code>${JSON.stringify(expected, null, 2)}</code>

</li>`)

}

var Test = (name, func) => {

testFailures = []

const pos = CALLER()

const jump = html`<button onclick=${() => pos.JUMP()}>${name}</button>`

try {

func()

} catch (e) {

return html`${jump} 💥 ${e.name}: ${e.message}<br/>

// TODO: .stack line numbers don't match editor numbering by \`functionLineOffset\`<br/>

${e.stack.split('\n')[0]}`

}

if (testFailures.length > 0) {

return html`${jump} ❌ <ul>${testFailures}</ul>`

// TODO link to source location

}

return html`${jump} ✅`

}

yield Test('exception', () => { foo.bar })

yield Test('addition', () => { assertEqual(2+2, 5); assertEqual(2+2, 4); assertEqual(2+2, [6]) })

yield Test('good', () => { assertEqual(2+2, 4) })

Use yield ... and/or return ... statements. To move focus outside editor, press Esc then Tab.