[Tests] convert varLib/models.py doctests into models_test.py

Tests/varLib/models_test.py

@@ -0,0 +1,77 @@
+from __future__ import print_function, division, absolute_import
+from fontTools.misc.py23 import *
+from fontTools.varLib.models import (
+    normalizeLocation, supportScalar, VariationModel)
+
+
+def test_normalizeLocation():
+    axes = {"wght": (100, 400, 900)}
+    assert normalizeLocation({"wght": 400}, axes) == {'wght': 0}
+    assert normalizeLocation({"wght": 100}, axes) == {'wght': -1.0}
+    assert normalizeLocation({"wght": 900}, axes) == {'wght': 1.0}
+    assert normalizeLocation({"wght": 650}, axes) == {'wght': 0.5}
+    assert normalizeLocation({"wght": 1000}, axes) == {'wght': 1.0}
+    assert normalizeLocation({"wght": 0}, axes) == {'wght': -1.0}
+
+    axes = {"wght": (0, 0, 1000)}
+    assert normalizeLocation({"wght": 0}, axes) == {'wght': 0}
+    assert normalizeLocation({"wght": -1}, axes) == {'wght': 0}
+    assert normalizeLocation({"wght": 1000}, axes) == {'wght': 1.0}
+    assert normalizeLocation({"wght": 500}, axes) == {'wght': 0.5}
+    assert normalizeLocation({"wght": 1001}, axes) == {'wght': 1.0}
+
+    axes = {"wght": (0, 1000, 1000)}
+    assert normalizeLocation({"wght": 0}, axes) == {'wght': -1.0}
+    assert normalizeLocation({"wght": -1}, axes) == {'wght': -1.0}
+    assert normalizeLocation({"wght": 500}, axes) == {'wght': -0.5}
+    assert normalizeLocation({"wght": 1000}, axes) == {'wght': 0}
+    assert normalizeLocation({"wght": 1001}, axes) == {'wght': 0}
+
+
+def test_supportScalar():
+    assert supportScalar({}, {}) == 1.0
+    assert supportScalar({'wght':.2}, {}) == 1.0
+    assert supportScalar({'wght':.2}, {'wght':(0,2,3)}) == 0.1
+    assert supportScalar({'wght':2.5}, {'wght':(0,2,4)}) == 0.75
+
+
+def test_VariationModel():
+    locations = [
+        {'wght':100},
+        {'wght':-100},
+        {'wght':-180},
+        {'wdth':+.3},
+        {'wght':+120,'wdth':.3},
+        {'wght':+120,'wdth':.2},
+        {},
+        {'wght':+180,'wdth':.3},
+        {'wght':+180},
+    ]
+    model = VariationModel(locations, axisOrder=['wght'])
+
+    assert model.locations == [
+        {},
+        {'wght': -100},
+        {'wght': -180},
+        {'wght': 100},
+        {'wght': 180},
+        {'wdth': 0.3},
+        {'wdth': 0.3, 'wght': 180},
+        {'wdth': 0.3, 'wght': 120},
+        {'wdth': 0.2, 'wght': 120}]
+
+    assert model.deltaWeights == [
+        {},
+        {0: 1.0},
+        {0: 1.0},
+        {0: 1.0},
+        {0: 1.0},
+        {0: 1.0},
+        {0: 1.0, 4: 1.0, 5: 1.0},
+        {0: 1.0, 3: 0.75, 4: 0.25, 5: 1.0, 6: 0.25},
+        {0: 1.0,
+         3: 0.75,
+         4: 0.25,
+         5: 0.6666666666666667,
+         6: 0.16666666666666669,
+         7: 0.6666666666666667}]