RF - removed duplicate tests

[gabknight]

Tests on ThresholdTissueClassifier are duplicated in dipy.tracking.tests.test_localtracking.py and dipy.tracking.local.tests.test_tissue_classifier. The former tests are redundant.

Current tests for ThresholdTissueClassifier:
dipy.tracking.local.test_tissue_classifier.py: line 61.

def test_threshold_tissue_classifier():
    """This tests that the thresholdy tissue classifier returns expected
     tissue types.
    """

    tissue_map = np.random.random((4, 4, 4))

    ttc = ThresholdTissueClassifier(tissue_map.astype('float32'), 0.5)

    # Test voxel center
    for ind in ndindex(tissue_map.shape):
        pts = np.array(ind, dtype='float64')
        state = ttc.check_point(pts)
        if tissue_map[ind] > 0.5:
            npt.assert_equal(state, TissueTypes.TRACKPOINT)
        else:
            npt.assert_equal(state, TissueTypes.ENDPOINT)

    # Test random points in voxel
    inds = [[0, 1.4, 2.2], [0, 2.3, 2.3], [0, 2.2, 1.3], [0, 0.9, 2.2],
            [0, 2.8, 1.1], [0, 1.1, 3.3], [0, 2.1, 1.9], [0, 3.1, 3.1],
            [0, 0.1, 0.1], [0, 0.9, 0.5], [0, 0.9, 0.5], [0, 2.9, 0.1]]
    for pts in inds:
        pts = np.array(pts, dtype='float64')
        state = ttc.check_point(pts)
        res = scipy.ndimage.map_coordinates(
            tissue_map, np.reshape(pts, (3, 1)), order=1, mode='nearest')
        if res > 0.5:
            npt.assert_equal(state, TissueTypes.TRACKPOINT)
        else:
            npt.assert_equal(state, TissueTypes.ENDPOINT)

    # Test outside points
    outside_pts = [[100, 100, 100], [0, -1, 1], [0, 10, 2],
                   [0, 0.5, -0.51], [0, -0.51, 0.1]]
    for pts in outside_pts:
        pts = np.array(pts, dtype='float64')
        state = ttc.check_point(pts)
        npt.assert_equal(state, TissueTypes.OUTSIDEIMAGE)

[codecov-io]

Codecov Report

Merging #1626 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1626      +/-   ##
==========================================
- Coverage   87.33%   87.32%   -0.01%     
==========================================
  Files         246      245       -1     
  Lines       32164    32148      -16     
  Branches     3497     3493       -4     
==========================================
- Hits        28089    28073      -16     
  Misses       3242     3242              
  Partials      833      833

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[skoudoro]

Thank you @gabknight for catching that