rot_3d and transpose test added

tests/test_rot3D.py

@@ -0,0 +1,18 @@
+import math, pytest
+from matrixmania import rot_3D
+
+def test_rot_3D_x_axis():
+    angle = math.pi / 2
+    R = rot_3D(angle, 'x')
+    expected = [
+        [1, 0, 0],
+        [0, 0, -1],
+        [0, 1, 0]
+    ]
+    for r, e in zip(R, expected):
+        for rv, ev in zip(r, e):
+            assert math.isclose(rv, ev, abs_tol=1e-9)
+
+def test_rot_3D_invalid_axis():
+    with pytest.raises(ValueError):
+        rot_3D(math.pi/4, 'a')

tests/test_transpose.py

@@ -0,0 +1,12 @@
+import math, pytest
+from matrixmania import transpose
+
+def test_transpose_basic():
+    matrix = [[1, 2, 3], [4, 5, 6]]
+    expected = [[1, 4], [2, 5], [3, 6]]
+    assert transpose(matrix) == expected
+
+def test_transpose_invalid():
+    matrix = [[1, 2], [3]]
+    with pytest.raises(ValueError):
+        transpose(matrix)