Test for WebGL1 that GLSL arrays can not be initialized?

In GLSL ES 1.0 you can not do

float array[3] = float[3](1.0, 2.0, 3.0);

But you can in GLSL ES 3.0.

In fact in WebGL1 we get these error from ANGLE

ERROR: 0:13: '[]' : array constructor supported in GLSL ES 3.00 and above only
ERROR: 0:13: '[]' : first-class arrays (array initializer) supported in GLSL ES 3.00 and above only

I see a few WebGL2 tests that you can use that style. I don't see any WebGL1 tests that you can't

Am I missing it or should one be added?

Note: you can do this in GLSL 1.0

float array[3];
array[0] = 1.0;
array[1] = 2.0;
array[2] = 3.0;

and that is tested.

Compare the existing WebGL2 tests for array constructors with the WebGL1 tests covering array declarations and assignments. Add a WebGL1 test for the rejected array-initializer syntax, then run the relevant WebGL1 tests and verify that compilation produces the expected failure.

Written by the indexing model from the issue text.