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@@ -1 +1,44 @@
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+require 'test/unit'
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+require 'frametime'
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+
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+class TestFrameTime < Test::Unit::TestCase
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+  
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+  def initialize(*args)
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+    super(*args)
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+    
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+    @tc  = "12:05:10:01"
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+    @tc2 = "12:05:10:02"
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+    @tc3 = "12:05:11:02"
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+    @tc4 = "10:04:11:02"
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+  end
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+  
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+  def test_parses_timecode_correctly
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+    ft = FrameTime.parse(@tc)
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+    assert_equal(ft.to_s, @tc)
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+  end
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+  
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+  def test_adds_frame_using_number
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+    ft = FrameTime.parse(@tc)
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+    ft.add!(0,1)
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+    assert_equal(ft.to_s, @tc2)
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+  end
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+  
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+  def test_adds_frame_using_timecode
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+    ft = FrameTime.parse(@tc)
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+    ft + "00:00:00:01"
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+    assert_equal(ft.to_s, @tc2)
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+  end
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+  
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+  def test_adds_second_and_frame_using_numbers
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+    ft = FrameTime.parse(@tc)
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+    ft.add!(1,1)
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+    assert_equal(ft.to_s, @tc3)
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+  end
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+  
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+  def test_minuses_two_hours_and_one_minute_using_timecode
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+    ft = FrameTime.parse(@tc3)
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+    ft - "02:01:00:00"
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+    assert_equal(ft.to_s, @tc4)
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+  end
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+end