old_contents: from nose.tools import *
  import math
  from hcsr04sensor.sensor import Measurement
  
  TRIG_PIN = 17
  ECHO_PIN = 27
  
  def test_measurement():
      '''Assure object is being created properly.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 20, 'metric', 1)
      assert_equal(value.trig_pin, 17)
      assert_equal(value.echo_pin, 27)
      assert_equal(value.temperature, 20)
      assert_equal(value.unit, 'metric')
      assert_equal(value.round_to, 1)
  
  
  def test_imperial_temperature_and_speed_of_sound():
      '''Test that after Fahrenheit is converted to Celsius that speed of sound is
      calculated correctly.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 68, 'imperial', 1)
      raw_measurement = value.raw_distance()
      speed_of_sound = 331.3 * math.sqrt(1+(value.temperature / 273.15))
      assert_equal(value.temperature, 20.0016)
      assert type(raw_measurement) == float
      assert_equal(speed_of_sound, 343.21555930656075)
  
  
  def test_imperial_measurements():
      '''Test that an imperial measurement is what you would expect with a precise
      raw_measurement.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 68, 'imperial', 1)
      raw_measurement = 26.454564846
      hole_depth = 25
  
      imperial_distance = value.distance_imperial(raw_measurement)
      imperial_depth = value.depth_imperial(raw_measurement, hole_depth)
  
      assert type(imperial_distance) == float
      assert_equal(imperial_distance, 10.4)
      assert_equal(imperial_depth, 14.6)
  
  
  def test_metric_measurements():
      '''Test that a metric measurement is what you would expect with a precise
      raw_measurement.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 20, 'metric', 1)
      raw_measurement = 48.80804985408
      hole_depth = 72
  
      metric_distance = value.distance_metric(raw_measurement)
      metric_depth = value.depth_metric(raw_measurement, hole_depth)
  
      assert_equal(metric_distance, 48.8)
      assert_equal(metric_depth, 23.2)
  
  
  def test_different_sample_size():
      '''Test to ensure that a user defined sample size works correctly.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 68, 'imperial', 1)
      raw_measurement1 = value.raw_distance(sample_size=1)
      raw_measurement2 = value.raw_distance(sample_size=4)
      raw_measurement3 = value.raw_distance(sample_size=11)
      assert type(raw_measurement1) == float
      assert type(raw_measurement2) == float
      assert type(raw_measurement3) == float
  
new_contents: from nose.tools import *
  import math
  from hcsr04sensor.sensor import Measurement
  
  TRIG_PIN = 23
  ECHO_PIN = 24
  
  def test_measurement():
      '''Assure object is being created properly.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 20, 'metric', 1)
      assert_equal(isinstance(value, Measurement), True)
      assert_equal(value.trig_pin, TRIG_PIN)
      assert_equal(value.echo_pin, ECHO_PIN)
      assert_equal(value.temperature, 20)
      assert_equal(value.unit, 'metric')
      assert_equal(value.round_to, 1)
  
  
  def test_imperial_temperature_and_speed_of_sound():
      '''Test that after Fahrenheit is converted to Celsius that speed of sound is
      calculated correctly.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 68, 'imperial', 1)
      raw_measurement = value.raw_distance()
      speed_of_sound = 331.3 * math.sqrt(1+(value.temperature / 273.15))
      assert_equal(value.temperature, 20.0016)
      assert type(raw_measurement) == float
      assert_equal(speed_of_sound, 343.21555930656075)
  
  
  def test_imperial_measurements():
      '''Test that an imperial measurement is what you would expect with a precise
      raw_measurement.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 68, 'imperial', 1)
      raw_measurement = 26.454564846
      hole_depth = 25
  
      imperial_distance = value.distance_imperial(raw_measurement)
      imperial_depth = value.depth_imperial(raw_measurement, hole_depth)
  
      assert type(imperial_distance) == float
      assert_equal(imperial_distance, 10.4)
      assert_equal(imperial_depth, 14.6)
  
  
  def test_metric_measurements():
      '''Test that a metric measurement is what you would expect with a precise
      raw_measurement.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 20, 'metric', 1)
      raw_measurement = 48.80804985408
      hole_depth = 72
  
      metric_distance = value.distance_metric(raw_measurement)
      metric_depth = value.depth_metric(raw_measurement, hole_depth)
  
      assert_equal(metric_distance, 48.8)
      assert_equal(metric_depth, 23.2)
  
  
  def test_different_sample_size():
      '''Test to ensure that a user defined sample size works correctly.'''
      value = Measurement(TRIG_PIN, ECHO_PIN, 68, 'imperial', 1)
      raw_measurement1 = value.raw_distance(sample_size=1)
      raw_measurement2 = value.raw_distance(sample_size=4)
      raw_measurement3 = value.raw_distance(sample_size=11)
      assert type(raw_measurement1) == float
      assert type(raw_measurement2) == float
      assert type(raw_measurement3) == float
  
subject: Modify sensor_test.py