added tests for tridiagonal solve

tests/link/jax/test_slinalg.py

@@ -122,6 +122,38 @@ def test_jax_solve():
     )
 
 
+def test_jax_tridiagonal_solve():
+    N = 10
+    A = pt.matrix("A", shape=(N, N))
+    b = pt.vector("b", shape=(N,))
+
+    out = pt.linalg.solve(A, b, assume_a="tridiagonal")
+
+    A_val = np.eye(N)
+    for i in range(N - 1):
+        A_val[i, i + 1] = np.random.randn()
+        A_val[i + 1, i] = np.random.randn()
+
+    b_val = np.random.randn(N)
+
+    compare_jax_and_py(
+        [A, b],
+        [out],
+        [A_val, b_val],
+    )
+
+    b_ = pt.matrix("b", shape=(N, 2))
+
+    out = pt.linalg.solve(A, b_, assume_a="tridiagonal")
+    b_val = np.random.randn(N, 2)
+
+    compare_jax_and_py(
+        [A, b_],
+        [out],
+        [A_val, b_val],
+    )
+
+
 def test_jax_SolveTriangular():
     rng = np.random.default_rng(utt.fetch_seed())