Missing space between var1 instanceof var2 in output

[OmgImAlexis]

Description

When a test fails while using test.true(var1 instanceof var2) the output removes the spaces.

Test Source

test('returns itself', t => {                
    t.true(t.context.script instanceof Script);
});

Error Message & Stack Trace

  1 failed
  1 rejection

  returns itself

  /Users/xo/code/@lad/mongoose/test/test.js:10

    9: test('returns itself', t => {                
   10:   t.true(t.context.script instanceof Script);
   11: });                                          

  Value is not `true`:

  false

  t.context.scriptinstanceofScript
  => false

Config

Copy the relevant section from package.json:

{
  "ava": {
  ...
  }
}

Command-Line Arguments

Copy your npm build scripts or the ava command used:

ava

Environment

Tell us which operating system you are using, as well as which versions of Node.js, npm, and AVA. Run the following to get it quickly:

Node.js v8.4.0
darwin 16.7.0
ava 0.22.0
npm 5.3.0

[novemberborn]

Yea that's not great. Thanks for reporting it.

[codeslikejaggars]

The same behavior affects any infix operator. Empty strings are also rendered invisible:

const val = 'some value';
test('fails with multiple === expressions', t => {
	t.false(val === '' && '' === val);
});

  1 failed

  fails with multiple === expressions

  /Users/path/ava/test/fixture/enhanced-assertion-spaces.js:5

   4: test('fails with multiple === expressions', t => {
   5:   t.true(val === '' && '' === val);
   6: });

  Value is not `true`:

  false

  val===&&===val
  => false

  val===
  => false

  val
  => 'some value'

One way to resolve this would be to use babel-generator in enhance-assert.js to regenerate the code from the AST, instead of concatenating the token values.

[OmgImAlexis]

@codeslikejaggars @novemberborn thank you!