add time module and move fixed-point iteration to own function

tests/test_time_of_day.py

@@ -0,0 +1,95 @@
+"""Test of fit module.
+
+:Date: 2019-06-01
+
+.. module:: test_fit
+  :platform: *nix, Windows
+  :synopsis: Test of fit module.
+
+.. moduleauthor:: Daniel Weschke <daniel.weschke@directbox.de>
+"""
+from __future__ import division, print_function, unicode_literals
+import unittest
+from time import mktime
+
+import os
+import sys
+sys.path.insert(0, os.path.abspath('../src'))
+from time_of_day import (in_seconds, seconds, seconds_norm,
+  minutes, minutes_norm, hours, hours_norm, days, days_norm,
+  transform)
+
+# tm_year, tm_mon, tm_mday, tm_hour, tm_min, tm_sec,
+# tm_wday, tm_yday, tm_isdst
+T = mktime((2000, 11, 30, 0, 10, 20, 3, 335, -1))
+
+
+class TestTimeOfDay(unittest.TestCase):
+
+  def test_in_seconds(self):
+    """test in_seconds"""
+    t = in_seconds(T)
+    self.assertEqual(t, 975539420.0)
+
+  def test_seconds(self):
+    """test seconds"""
+    t = seconds(T)
+    self.assertEqual(t, 20.0)
+
+  def test_seconds_norm(self):
+    """test seconds_norm"""
+    t = seconds_norm(T)
+    self.assertEqual(t, 20.0/60)  # 0.3333333333333333
+
+  def test_minutes(self):
+    """test minutes"""
+    t = minutes(T)
+    self.assertEqual(t, T/60%60)  # 10.333333333954215
+
+  def test_minutes_norm(self):
+    """test minutes_norm"""
+    t = minutes_norm(T)
+    self.assertEqual(t, T/60%60/60)  # 0.17222222223257025
+
+  def test_hours(self):
+    """test hours"""
+    t = hours(T)
+    self.assertEqual(t, T/60/60%24)  # 23.172222222259734
+
+  def test_hours_norm(self):
+    """test hours_norm"""
+    t = hours_norm(T)
+    self.assertEqual(t, T/60/60%24/24)  # 0.9655092592608222
+
+  def test_days(self):
+    """test days"""
+    t = days(T)
+    self.assertEqual(t, T/60/60/24%365.2425)  # 333.69050925926
+
+  def test_days_norm(self):
+    """test days_norm"""
+    t = days_norm(T)
+    # 0.9136135834664915
+    self.assertEqual(t, T/60/60/24%365.2425/365.2425)
+
+  def test_transform_minutes(self):
+    """test transform minutes"""
+    min_norm = minutes_norm(T)
+    x_len = 30
+    x_offset = -8
+    x_pos = transform(min_norm, x_len, x_offset)
+    # -2.8333333330228925
+    self.assertEqual(x_pos, min_norm*x_len + x_offset)
+
+  def test_transform_hours(self):
+    """test transform hours"""
+    h_norm = hours_norm(T)
+    y_len = 20
+    y_offset = -10
+    y_pos = transform(h_norm, y_len, y_offset)
+    # 9.310185185216444
+    self.assertEqual(y_pos, h_norm*y_len + y_offset)
+
+
+if __name__ == '__main__':
+  unittest.main()