function assertThatCircuitShaderActsLikeMatrix(shaderFunc, matrix, repeats=5) {
    assertThatCircuitUpdateActsLikeMatrix(
        ctx => ctx.applyOperation(shaderFunc),
        matrix,
        repeats);
}
@param {function(!CircuitEvalContext) : !WglConfiguredShader} shaderFunc
@param {!Matrix} matrix
@param {!int=} repeats