Add targeted Vector test coverage

pyqtgraph/tests/test_Vector.py

@@ -0,0 +1,71 @@
+# -*- coding: utf-8 -*-
+import pytest
+import pyqtgraph as pg
+from pyqtgraph.Qt import QtCore, QtGui
+
+
+def test_Vector_init():
+    """Test construction of Vector objects from a variety of source types."""
+    # separate values without z
+    v = pg.Vector(0, 1)
+    assert v.z() == 0
+
+    v = pg.Vector(0.0, 1.0)
+    assert v.z() == 0
+
+    # separate values with 3 args
+    v = pg.Vector(0, 1, 2)
+    v = pg.Vector(0.0, 1.0, 2.0)
+
+    # all in a list
+    v = pg.Vector([0, 1])
+    assert v.z() == 0
+    v = pg.Vector([0, 1, 2])
+
+    # QSizeF
+    v = pg.Vector(QtCore.QSizeF(1, 2))
+    assert v.x() == 1
+    assert v.z() == 0
+
+    # QPoint
+    v = pg.Vector(QtCore.QPoint(0, 1))
+    assert v.z() == 0
+    v = pg.Vector(QtCore.QPointF(0, 1))
+    assert v.z() == 0
+
+    # QVector3D
+    qv = QtGui.QVector3D(1, 2, 3)
+    v = pg.Vector(qv)
+    assert v == qv
+
+    with pytest.raises(Exception):
+        v = pg.Vector(1, 2, 3, 4)
+
+
+def test_Vector_interface():
+    """Test various aspects of the Vector API."""
+    v = pg.Vector(-1, 2)
+
+    # len
+    assert len(v) == 3
+
+    # indexing
+    assert v[0] == -1
+    assert v[2] == 0
+    with pytest.raises(IndexError):
+        x = v[4]
+
+    assert v[1] == 2
+    v[1] = 5
+    assert v[1] == 5
+
+    # iteration
+    v2 = pg.Vector(*v)
+    assert v2 == v
+
+    assert abs(v).x() == 1
+
+    # angle
+    v1 = pg.Vector(1, 0)
+    v2 = pg.Vector(1, 1)
+    assert abs(v1.angle(v2) - 45) < 0.001