Tests CSS.setSupportsText method.
==== Initial style sheet text ====
@supports (display: grid) {
  div {
    display: grid;
  }
}


Running test: testSimpleEdit
==== Style sheet text ====
@supports (display: flex) {
  div {
    display: grid;
  }
}


Running test: testInvalidParameters
Expected protocol error: Invalid parameters (Failed to deserialize params.range.startLine - BINDINGS: int32 value expected <somewhere>)

Running test: testInvalidText
Expected protocol error: SyntaxError Selector or supports rule text is not valid.

Running test: testEditSequentially
==== Style sheet text ====
@supports (display: flex) {
  div {
    display: grid;
  }
}

==== Style sheet text ====
@supports (display: none) {
  div {
    display: grid;
  }
}


Running test: testAfterSequentially
==== Style sheet text ====
@supports (display: inline) {
  div {
    display: grid;
  }
}