/* TODO FIXME: use homogenous tuples and L1 prelude
use lsts::tlc::TLC;

#[test]
fn check_tensor_syntax() {
   let mut tlc = TLC::new();
   let si = tlc.import_file(None, "preludes/si.tlc").unwrap();

   tlc.check(Some(si), "let a:Number[];").unwrap();
   tlc.check(Some(si), "let a:Number[1];").unwrap();
   tlc.check(Some(si), "let a:Number[1][2];").unwrap();
   tlc.check(Some(si), "let a:Number[1][];").unwrap();
   tlc.check(Some(si), "let a:Number[][2];").unwrap();
}

#[test]
fn check_tensor_sugar() {
   let mut tlc = TLC::new();
   let si = tlc.import_file(None, "preludes/si.tlc").unwrap();

   tlc.check(Some(si), "let a:Number[]; a: Tensor<Number,?>;").unwrap();
   tlc.check(Some(si), "let a:Number[]; a: Tensor<Number,[1]>;").unwrap_err();
   tlc.check(Some(si), "let a:Number[1]; a: Tensor<Number,[1]>;").unwrap();
   tlc.check(Some(si), "let a:Number[1]; a: Tensor<Number,[2]>;").unwrap_err();
   tlc.check(Some(si), "let a:Number[1][2]; a: Tensor<Tensor<Number,[2]>,[1]>;").unwrap();
   tlc.check(Some(si), "let a:Number[1][2]; a: Tensor<Tensor<Number,[1]>,[2]>;").unwrap_err();
   tlc.check(Some(si), "let a:Number[1][]; a: Tensor<Tensor<Number,?>,[1]>;").unwrap();
   tlc.check(Some(si), "let a:Number[1][]; a: Tensor<Tensor<Number,?>,[2]>;").unwrap_err();
   tlc.check(Some(si), "let a:Number[][2]; a: Tensor<Tensor<Number,[2]>,?>;").unwrap();
   tlc.check(Some(si), "let a:Number[][2]; a: Tensor<Tensor<Number,[1]>,?>;").unwrap_err();
}

#[test]
fn check_tensor_covariance() {
   let mut tlc = TLC::new();
   let si = tlc.import_file(None, "preludes/si.tlc").unwrap();

   tlc.check(Some(si), "let a:Number[]; a: Tensor<Number,[1]>").unwrap_err();
   tlc.check(Some(si), "let a:Number[][]; a: Tensor<Tensor<Number,[1]>,?>;").unwrap_err();
   tlc.check(Some(si), "let a:Number[][]; a: Tensor<Tensor<Number,?>,[1]>;").unwrap_err();
   tlc.check(Some(si), "let a:Number[1][]; a: Tensor<Tensor<Number,[1]>,?>;").unwrap_err();
   tlc.check(Some(si), "let a:Number[][1]; a: Tensor<Tensor<Number,?>,[1]>;").unwrap_err();
}

#[test]
fn check_tensor_invariants() {
   let mut tlc = TLC::new();
   let si = tlc.import_file(None, "preludes/si.tlc").unwrap();

   tlc.check(Some(si), "let a:Number[1]; a.length: [1];").unwrap();
   tlc.check(Some(si), "let a:Number[2]; a.length: [2];").unwrap();
   tlc.check(Some(si), "let a:Number[2]; a.length: [3];").unwrap_err();
   tlc.check(Some(si), "let a:Number[1]; a.length==0: [True];").unwrap_err();
   tlc.check(Some(si), "let a:Number[1]; a.length==0: [False];").unwrap();
   tlc.check(Some(si), "let a:Number[1]; a.length==1: [True];").unwrap();
   tlc.check(Some(si), "let a:Number[1]; a.length==1: [False];").unwrap_err();
}
*/