add one test for forwarding

Signed-off-by: José Carlos García <hola@josecarlos.me>

candle-nn/tests/bit_linear.rs

@@ -0,0 +1,15 @@
+use candle::{Device::Cpu, Result, Tensor};
+use candle_nn::{BitLinear, Module};
+
+#[test]
+fn test_forward_no_bias() -> Result<()> {
+    let weight = Tensor::new(&[[1f32, -1.], [-1., 1.], [1., 1.]], &Cpu)?;
+    let layer = BitLinear::new(weight.clone(), None);
+
+    let input = Tensor::new(&[[1f32, -1.]], &Cpu)?;
+    let output = layer.forward(&input)?;
+    let expected_output = Tensor::new(&[[2.0f32, -2.0, 0.0]], &Cpu)?;
+
+    assert_eq!(output.to_vec2::<f32>()?, expected_output.to_vec2::<f32>()?);
+    Ok(())
+}