def test_computeArcCenterOffsets_zeroRadius(self):
"""Test the computeArcCenterOffsets method with a radius of zero."""
mockLogger = mock.Mock()
mockState = mock.Mock()
mockState.position.X_AXIS.nativeToLogical.return_value = 0
mockState.position.Y_AXIS.nativeToLogical.return_value = 0
unit = GcodeHandlers(mockState, mockLogger)
result = unit.computeArcCenterOffsets(10, 10, 0, True)
self.assertEqual(result, (0, 0),
"No offset should be computed when the radius is 0")
def test_computeArcCenterOffsets_counterClockwise_semicircle(self):
"""Test the computeArcCenterOffsets method with a CCW semicircular 100 unit arc."""
arcRadius = 50
mockLogger = mock.Mock()
mockState = mock.Mock()
mockState.position.X_AXIS.nativeToLogical.return_value = arcRadius
mockState.position.Y_AXIS.nativeToLogical.return_value = 0
unit = GcodeHandlers(mockState, mockLogger)
result = unit.computeArcCenterOffsets(-arcRadius, 0, arcRadius, False)
self.assertEqual(
result, (-arcRadius, 0),
"The computed center offset should be (%s, %s)" % (-arcRadius, 0))
def test_computeArcCenterOffsets_circle(self):
"""Test the computeArcCenterOffsets method when the start and end points are identical."""
arcRadius = 50
mockLogger = mock.Mock()
mockState = mock.Mock()
mockState.position.X_AXIS.nativeToLogical.return_value = 0
mockState.position.Y_AXIS.nativeToLogical.return_value = 0
unit = GcodeHandlers(mockState, mockLogger)
result = unit.computeArcCenterOffsets(0, 0, arcRadius, True)
self.assertEqual(
result, (0, 0),
"No offset should be computed when the start and end points are the same"
)
def test_computeArcCenterOffsets_radiusTooSmall(self):
"""Test computeArcCenterOffsets when the radius is less than half the chord length."""
mockLogger = mock.Mock()
mockState = mock.Mock()
mockState.position.X_AXIS.nativeToLogical.return_value = 0
mockState.position.Y_AXIS.nativeToLogical.return_value = 0
unit = GcodeHandlers(mockState, mockLogger)
# Try chord length 10, radius 4
result = unit.computeArcCenterOffsets(10, 0, 4, True)
self.assertEqual(
result, (0, 0),
"No offset should be computed if the radius is less than half the chord length."
)
def test_computeArcCenterOffsets_negativeRadius(self):
"""Test computeArcCenterOffsets method with a negative radius value."""
# Tests an arc with a chord length of 8 (half-width of 4) and a height (from chord to
# center point on arc) of 3
arcRadius = -(4.0 + 1.0 / 6.0)
mockLogger = mock.Mock()
mockState = mock.Mock()
mockState.position.X_AXIS.nativeToLogical.return_value = 0
mockState.position.Y_AXIS.nativeToLogical.return_value = 0
unit = GcodeHandlers(mockState, mockLogger)
result = unit.computeArcCenterOffsets(8, 0, arcRadius, True)
self.assertEqual(
result[0], 4,
"The returned I value should match the expected value")
self.assertAlmostEqual(
result[1],
arcRadius + 3, # Note addition here when radius is negative
msg="The returned J value should match the expected value")