diff --git a/spec/lib/commas_spec.coffee b/spec/lib/commas_spec.coffee
new file mode 100644
index 0000000..f33f4b5
--- /dev/null
+++ b/spec/lib/commas_spec.coffee
@@ -0,0 +1,35 @@
+describe '#commas', ->
+
+  it 'should insert commas into long numbers', ->
+    # zero
+    Morris.commas(0).should.equal("0")
+
+    # positive integers
+    Morris.commas(1).should.equal("1")
+    Morris.commas(12).should.equal("12")
+    Morris.commas(123).should.equal("123")
+    Morris.commas(1234).should.equal("1,234")
+    Morris.commas(12345).should.equal("12,345")
+    Morris.commas(123456).should.equal("123,456")
+    Morris.commas(1234567).should.equal("1,234,567")
+
+    # negative integers
+    Morris.commas(-1).should.equal("-1")
+    Morris.commas(-12).should.equal("-12")
+    Morris.commas(-123).should.equal("-123")
+    Morris.commas(-1234).should.equal("-1,234")
+    Morris.commas(-12345).should.equal("-12,345")
+    Morris.commas(-123456).should.equal("-123,456")
+    Morris.commas(-1234567).should.equal("-1,234,567")
+
+    # positive decimals
+    Morris.commas(1.2).should.equal("1.2")
+    Morris.commas(12.34).should.equal("12.34")
+    Morris.commas(123.456).should.equal("123.456")
+    Morris.commas(1234.56).should.equal("1,234.56")
+
+    # negative decimals
+    Morris.commas(-1.2).should.equal("-1.2")
+    Morris.commas(-12.34).should.equal("-12.34")
+    Morris.commas(-123.456).should.equal("-123.456")
+    Morris.commas(-1234.56).should.equal("-1,234.56")
\ No newline at end of file
diff --git a/spec/lib/label_series_spec.coffee b/spec/lib/label_series_spec.coffee
new file mode 100644
index 0000000..cdb7884
--- /dev/null
+++ b/spec/lib/label_series_spec.coffee
@@ -0,0 +1,146 @@
+describe '#labelSeries', ->
+
+  it 'should generate year intervals', ->
+    Morris.labelSeries(
+      new Date(2007, 0, 1).getTime(),
+      new Date(2012, 0, 1).getTime(),
+      1000
+    ).should.deep.equal([
+      ["2007", new Date(2007, 0, 1).getTime()],
+      ["2008", new Date(2008, 0, 1).getTime()],
+      ["2009", new Date(2009, 0, 1).getTime()],
+      ["2010", new Date(2010, 0, 1).getTime()],
+      ["2011", new Date(2011, 0, 1).getTime()],
+      ["2012", new Date(2012, 0, 1).getTime()]
+    ])
+    Morris.labelSeries(
+      new Date(2007, 3, 1).getTime(),
+      new Date(2012, 3, 1).getTime(),
+      1000
+    ).should.deep.equal([
+      ["2008", new Date(2008, 0, 1).getTime()],
+      ["2009", new Date(2009, 0, 1).getTime()],
+      ["2010", new Date(2010, 0, 1).getTime()],
+      ["2011", new Date(2011, 0, 1).getTime()],
+      ["2012", new Date(2012, 0, 1).getTime()]
+    ])
+
+  it 'should generate month intervals', ->
+    Morris.labelSeries(
+      new Date(2012, 0, 1).getTime(),
+      new Date(2012, 5, 1).getTime(),
+      1000
+    ).should.deep.equal([
+      ["2012-01", new Date(2012, 0, 1).getTime()],
+      ["2012-02", new Date(2012, 1, 1).getTime()],
+      ["2012-03", new Date(2012, 2, 1).getTime()],
+      ["2012-04", new Date(2012, 3, 1).getTime()],
+      ["2012-05", new Date(2012, 4, 1).getTime()],
+      ["2012-06", new Date(2012, 5, 1).getTime()]
+    ])
+
+  it 'should generate day intervals', ->
+    Morris.labelSeries(
+      new Date(2012, 0, 1).getTime(),
+      new Date(2012, 0, 6).getTime(),
+      1000
+    ).should.deep.equal([
+      ["2012-01-01", new Date(2012, 0, 1).getTime()],
+      ["2012-01-02", new Date(2012, 0, 2).getTime()],
+      ["2012-01-03", new Date(2012, 0, 3).getTime()],
+      ["2012-01-04", new Date(2012, 0, 4).getTime()],
+      ["2012-01-05", new Date(2012, 0, 5).getTime()],
+      ["2012-01-06", new Date(2012, 0, 6).getTime()]
+    ])
+
+  it 'should generate hour intervals', ->
+    Morris.labelSeries(
+      new Date(2012, 0, 1, 0).getTime(),
+      new Date(2012, 0, 1, 5).getTime(),
+      1000
+    ).should.deep.equal([
+      ["00:00", new Date(2012, 0, 1, 0).getTime()],
+      ["01:00", new Date(2012, 0, 1, 1).getTime()],
+      ["02:00", new Date(2012, 0, 1, 2).getTime()],
+      ["03:00", new Date(2012, 0, 1, 3).getTime()],
+      ["04:00", new Date(2012, 0, 1, 4).getTime()],
+      ["05:00", new Date(2012, 0, 1, 5).getTime()]
+    ])
+
+  it 'should generate half-hour intervals', ->
+    Morris.labelSeries(
+      new Date(2012, 0, 1, 0, 0).getTime(),
+      new Date(2012, 0, 1, 2, 30).getTime(),
+      1000
+    ).should.deep.equal([
+      ["00:00", new Date(2012, 0, 1, 0, 0).getTime()],
+      ["00:30", new Date(2012, 0, 1, 0, 30).getTime()],
+      ["01:00", new Date(2012, 0, 1, 1, 0).getTime()],
+      ["01:30", new Date(2012, 0, 1, 1, 30).getTime()],
+      ["02:00", new Date(2012, 0, 1, 2, 0).getTime()],
+      ["02:30", new Date(2012, 0, 1, 2, 30).getTime()]
+    ])
+    Morris.labelSeries(
+      new Date(2012, 4, 12, 0, 0).getTime(),
+      new Date(2012, 4, 12, 2, 30).getTime(),
+      1000
+    ).should.deep.equal([
+      ["00:00", new Date(2012, 4, 12, 0, 0).getTime()],
+      ["00:30", new Date(2012, 4, 12, 0, 30).getTime()],
+      ["01:00", new Date(2012, 4, 12, 1, 0).getTime()],
+      ["01:30", new Date(2012, 4, 12, 1, 30).getTime()],
+      ["02:00", new Date(2012, 4, 12, 2, 0).getTime()],
+      ["02:30", new Date(2012, 4, 12, 2, 30).getTime()]
+    ])
+
+  it 'should generate fifteen-minute intervals', ->
+    Morris.labelSeries(
+      new Date(2012, 0, 1, 0, 0).getTime(),
+      new Date(2012, 0, 1, 1, 15).getTime(),
+      1000
+    ).should.deep.equal([
+      ["00:00", new Date(2012, 0, 1, 0, 0).getTime()],
+      ["00:15", new Date(2012, 0, 1, 0, 15).getTime()],
+      ["00:30", new Date(2012, 0, 1, 0, 30).getTime()],
+      ["00:45", new Date(2012, 0, 1, 0, 45).getTime()],
+      ["01:00", new Date(2012, 0, 1, 1, 0).getTime()],
+      ["01:15", new Date(2012, 0, 1, 1, 15).getTime()]
+    ])
+    Morris.labelSeries(
+      new Date(2012, 4, 12, 0, 0).getTime(),
+      new Date(2012, 4, 12, 1, 15).getTime(),
+      1000
+    ).should.deep.equal([
+      ["00:00", new Date(2012, 4, 12, 0, 0).getTime()],
+      ["00:15", new Date(2012, 4, 12, 0, 15).getTime()],
+      ["00:30", new Date(2012, 4, 12, 0, 30).getTime()],
+      ["00:45", new Date(2012, 4, 12, 0, 45).getTime()],
+      ["01:00", new Date(2012, 4, 12, 1, 0).getTime()],
+      ["01:15", new Date(2012, 4, 12, 1, 15).getTime()]
+    ])
+
+  it 'should override automatic intervals', ->
+    Morris.labelSeries(
+      new Date(2011, 11, 12).getTime(),
+      new Date(2012, 0, 12).getTime(),
+      1000,
+      "year"
+    ).should.deep.equal([
+      ["2012", new Date(2012, 0, 1).getTime()]
+    ])
+
+  it 'should apply custom formatters', ->
+    Morris.labelSeries(
+      new Date(2012, 0, 1).getTime(),
+      new Date(2012, 0, 6).getTime(),
+      1000,
+      "day",
+      (d) -> "#{d.getMonth()+1}/#{d.getDate()}/#{d.getFullYear()}"
+    ).should.deep.equal([
+      ["1/1/2012", new Date(2012, 0, 1).getTime()],
+      ["1/2/2012", new Date(2012, 0, 2).getTime()],
+      ["1/3/2012", new Date(2012, 0, 3).getTime()],
+      ["1/4/2012", new Date(2012, 0, 4).getTime()],
+      ["1/5/2012", new Date(2012, 0, 5).getTime()],
+      ["1/6/2012", new Date(2012, 0, 6).getTime()]
+    ])
diff --git a/spec/lib/line_spec.coffee b/spec/lib/line_spec.coffee
new file mode 100644
index 0000000..fa7f9b4
--- /dev/null
+++ b/spec/lib/line_spec.coffee
@@ -0,0 +1,31 @@
+describe 'Morris.Line', ->
+
+  beforeEach ->
+    placeholder = $('<div id="graph" style="width: 100px; height: 50px"></div>')
+    $('#test').append(placeholder)
+
+  afterEach ->
+    $('#test').empty()
+
+  it 'should not alter user-supplied data', ->
+    my_data = [{x: 1, y: 1}, {x: 2, y: 2}]
+    expected_data = [{x: 1, y: 1}, {x: 2, y: 2}]
+    Morris.Line
+      element: 'graph'
+      data: my_data
+      xkey: 'x'
+      ykeys: ['y']
+      labels: ['dontcare']
+    my_data.should.deep.equal expected_data
+
+  it 'should raise an error when the placeholder element is not found', ->
+    my_data = [{x: 1, y: 1}, {x: 2, y: 2}]
+    fn = ->
+      Morris.Line(
+        element: "thisplacedoesnotexist"
+        data: my_data
+        xkey: 'x'
+        ykeys: ['y']
+        labels: ['dontcare']
+      )
+    fn.should.throw(/Graph placeholder not found./)
\ No newline at end of file
diff --git a/spec/lib/pad_spec.coffee b/spec/lib/pad_spec.coffee
new file mode 100644
index 0000000..f81a592
--- /dev/null
+++ b/spec/lib/pad_spec.coffee
@@ -0,0 +1,17 @@
+describe '#pad', ->
+
+  it 'should pad numbers', ->
+    Morris.pad2(0).should.equal("00")
+    Morris.pad2(1).should.equal("01")
+    Morris.pad2(2).should.equal("02")
+    Morris.pad2(3).should.equal("03")
+    Morris.pad2(4).should.equal("04")
+    Morris.pad2(5).should.equal("05")
+    Morris.pad2(6).should.equal("06")
+    Morris.pad2(7).should.equal("07")
+    Morris.pad2(8).should.equal("08")
+    Morris.pad2(9).should.equal("09")
+    Morris.pad2(10).should.equal("10")
+    Morris.pad2(12).should.equal("12")
+    Morris.pad2(34).should.equal("34")
+    Morris.pad2(123).should.equal("123")
\ No newline at end of file
diff --git a/spec/lib/parse_time_spec.coffee b/spec/lib/parse_time_spec.coffee
new file mode 100644
index 0000000..199aa9d
--- /dev/null
+++ b/spec/lib/parse_time_spec.coffee
@@ -0,0 +1,35 @@
+describe '#parseTime', ->
+
+  it 'should parse years', ->
+    Morris.parseDate('2012').should.equal(new Date(2012, 0, 1).getTime())
+
+  it 'should parse quarters', ->
+    Morris.parseDate('2012 Q1').should.equal(new Date(2012, 2, 1).getTime())
+
+  it 'should parse months', ->
+    Morris.parseDate('2012-09').should.equal(new Date(2012, 8, 1).getTime())
+    Morris.parseDate('2012-10').should.equal(new Date(2012, 9, 1).getTime())
+
+  it 'should parse dates', ->
+    Morris.parseDate('2012-09-15').should.equal(new Date(2012, 8, 15).getTime())
+    Morris.parseDate('2012-10-15').should.equal(new Date(2012, 9, 15).getTime())
+
+  it 'should parse times', ->
+    Morris.parseDate("2012-10-15 12:34").should.equal(new Date(2012, 9, 15, 12, 34).getTime())
+    Morris.parseDate("2012-10-15T12:34").should.equal(new Date(2012, 9, 15, 12, 34).getTime())
+    Morris.parseDate("2012-10-15 12:34:55").should.equal(new Date(2012, 9, 15, 12, 34, 55).getTime())
+    Morris.parseDate("2012-10-15T12:34:55").should.equal(new Date(2012, 9, 15, 12, 34, 55).getTime())
+
+  it 'should parse times with timezones', ->
+    Morris.parseDate("2012-10-15T12:34+0100").should.equal(Date.UTC(2012, 9, 15, 11, 34))
+    Morris.parseDate("2012-10-15T12:34+02:00").should.equal(Date.UTC(2012, 9, 15, 10, 34))
+    Morris.parseDate("2012-10-15T12:34-0100").should.equal(Date.UTC(2012, 9, 15, 13, 34))
+    Morris.parseDate("2012-10-15T12:34-02:00").should.equal(Date.UTC(2012, 9, 15, 14, 34))
+    Morris.parseDate("2012-10-15T12:34:55Z").should.equal(Date.UTC(2012, 9, 15, 12, 34, 55))
+    Morris.parseDate("2012-10-15T12:34:55+0600").should.equal(Date.UTC(2012, 9, 15, 6, 34, 55))
+    Morris.parseDate("2012-10-15T12:34:55+04:00").should.equal(Date.UTC(2012, 9, 15, 8, 34, 55))
+    Morris.parseDate("2012-10-15T12:34:55-0600").should.equal(Date.UTC(2012, 9, 15, 18, 34, 55))
+
+  it 'should pass-through timestamps', ->
+    Morris.parseDate(new Date(2012, 9, 15, 12, 34, 55, 123).getTime())
+      .should.equal(new Date(2012, 9, 15, 12, 34, 55, 123).getTime())
\ No newline at end of file
diff --git a/spec/lib/test.unit.coffee b/spec/lib/test.unit.coffee
deleted file mode 100644
index 67c1408..0000000
--- a/spec/lib/test.unit.coffee
+++ /dev/null
@@ -1,245 +0,0 @@
-describe 'Morris.line', ->
-
-  beforeEach ->
-    placeholder = $('<div id="graph" style="width: 100px; height: 50px"></div>')
-    $('#test').append(placeholder)
-
-  afterEach ->
-    $('#test').empty()
-
-  it 'should not alter user-supplied data', ->
-    my_data = [{x: 1, y: 1}, {x: 2, y: 2}]
-    expected_data = [{x: 1, y: 1}, {x: 2, y: 2}]
-    Morris.Line
-      element: 'graph'
-      data: my_data
-      xkey: 'x'
-      ykeys: ['y']
-      labels: ['dontcare']
-    my_data.should.deep.equal expected_data
-
-  it 'should raise an error when the placeholder element is not found', ->
-    my_data = [{x: 1, y: 1}, {x: 2, y: 2}]
-    fn = ->
-      Morris.Line(
-        element: "thisplacedoesnotexist"
-        data: my_data
-        xkey: 'x'
-        ykeys: ['y']
-        labels: ['dontcare']
-      )
-    fn.should.throw(/Graph placeholder not found./)
-
-  it 'should insert commas into long numbers', ->
-    # zero
-    Morris.commas(0).should.equal("0")
-    # positive integers
-    Morris.commas(1).should.equal("1")
-    Morris.commas(12).should.equal("12")
-    Morris.commas(123).should.equal("123")
-    Morris.commas(1234).should.equal("1,234")
-    Morris.commas(12345).should.equal("12,345")
-    Morris.commas(123456).should.equal("123,456")
-    Morris.commas(1234567).should.equal("1,234,567")
-    # negative integers
-    Morris.commas(-1).should.equal("-1")
-    Morris.commas(-12).should.equal("-12")
-    Morris.commas(-123).should.equal("-123")
-    Morris.commas(-1234).should.equal("-1,234")
-    Morris.commas(-12345).should.equal("-12,345")
-    Morris.commas(-123456).should.equal("-123,456")
-    Morris.commas(-1234567).should.equal("-1,234,567")
-    # positive decimals
-    Morris.commas(1.2).should.equal("1.2")
-    Morris.commas(12.34).should.equal("12.34")
-    Morris.commas(123.456).should.equal("123.456")
-    Morris.commas(1234.56).should.equal("1,234.56")
-    # negative decimals
-    Morris.commas(-1.2).should.equal("-1.2")
-    Morris.commas(-12.34).should.equal("-12.34")
-    Morris.commas(-123.456).should.equal("-123.456")
-    Morris.commas(-1234.56).should.equal("-1,234.56")
-
-  it 'should pad numbers', ->
-    Morris.pad2(0).should.equal("00")
-    Morris.pad2(1).should.equal("01")
-    Morris.pad2(2).should.equal("02")
-    Morris.pad2(3).should.equal("03")
-    Morris.pad2(4).should.equal("04")
-    Morris.pad2(5).should.equal("05")
-    Morris.pad2(6).should.equal("06")
-    Morris.pad2(7).should.equal("07")
-    Morris.pad2(8).should.equal("08")
-    Morris.pad2(9).should.equal("09")
-    Morris.pad2(10).should.equal("10")
-    Morris.pad2(12).should.equal("12")
-    Morris.pad2(34).should.equal("34")
-    Morris.pad2(123).should.equal("123")
-
-  describe 'parsing timestamp strings', ->
-    it 'should parse years', ->
-      Morris.parseDate('2012').should.equal(new Date(2012, 0, 1).getTime())
-    it 'should parse quarters', ->
-      Morris.parseDate('2012 Q1').should.equal(new Date(2012, 2, 1).getTime())
-    it 'should parse months', ->
-      Morris.parseDate('2012-09').should.equal(new Date(2012, 8, 1).getTime())
-      Morris.parseDate('2012-10').should.equal(new Date(2012, 9, 1).getTime())
-    it 'should parse dates', ->
-      Morris.parseDate('2012-09-15').should.equal(new Date(2012, 8, 15).getTime())
-      Morris.parseDate('2012-10-15').should.equal(new Date(2012, 9, 15).getTime())
-    it 'should parse times', ->
-      Morris.parseDate("2012-10-15 12:34").should.equal(new Date(2012, 9, 15, 12, 34).getTime())
-      Morris.parseDate("2012-10-15T12:34").should.equal(new Date(2012, 9, 15, 12, 34).getTime())
-      Morris.parseDate("2012-10-15 12:34:55").should.equal(new Date(2012, 9, 15, 12, 34, 55).getTime())
-      Morris.parseDate("2012-10-15T12:34:55").should.equal(new Date(2012, 9, 15, 12, 34, 55).getTime())
-    it 'should parse times with timezones', ->
-      Morris.parseDate("2012-10-15T12:34+0100").should.equal(Date.UTC(2012, 9, 15, 11, 34))
-      Morris.parseDate("2012-10-15T12:34+02:00").should.equal(Date.UTC(2012, 9, 15, 10, 34))
-      Morris.parseDate("2012-10-15T12:34-0100").should.equal(Date.UTC(2012, 9, 15, 13, 34))
-      Morris.parseDate("2012-10-15T12:34-02:00").should.equal(Date.UTC(2012, 9, 15, 14, 34))
-      Morris.parseDate("2012-10-15T12:34:55Z").should.equal(Date.UTC(2012, 9, 15, 12, 34, 55))
-      Morris.parseDate("2012-10-15T12:34:55+0600").should.equal(Date.UTC(2012, 9, 15, 6, 34, 55))
-      Morris.parseDate("2012-10-15T12:34:55+04:00").should.equal(Date.UTC(2012, 9, 15, 8, 34, 55))
-      Morris.parseDate("2012-10-15T12:34:55-0600").should.equal(Date.UTC(2012, 9, 15, 18, 34, 55))
-    it 'should pass-through timestamps', ->
-      Morris.parseDate(new Date(2012, 9, 15, 12, 34, 55, 123).getTime())
-        .should.equal(new Date(2012, 9, 15, 12, 34, 55, 123).getTime())
-
-  describe 'automatically generating smart x-axis labels', ->
-    it 'should generate year intervals', ->
-      Morris.labelSeries(
-        new Date(2007, 0, 1).getTime(),
-        new Date(2012, 0, 1).getTime(),
-        1000
-      ).should.deep.equal([
-        ["2007", new Date(2007, 0, 1).getTime()],
-        ["2008", new Date(2008, 0, 1).getTime()],
-        ["2009", new Date(2009, 0, 1).getTime()],
-        ["2010", new Date(2010, 0, 1).getTime()],
-        ["2011", new Date(2011, 0, 1).getTime()],
-        ["2012", new Date(2012, 0, 1).getTime()]
-      ])
-      Morris.labelSeries(
-        new Date(2007, 3, 1).getTime(),
-        new Date(2012, 3, 1).getTime(),
-        1000
-      ).should.deep.equal([
-        ["2008", new Date(2008, 0, 1).getTime()],
-        ["2009", new Date(2009, 0, 1).getTime()],
-        ["2010", new Date(2010, 0, 1).getTime()],
-        ["2011", new Date(2011, 0, 1).getTime()],
-        ["2012", new Date(2012, 0, 1).getTime()]
-      ])
-    it 'should generate month intervals', ->
-      Morris.labelSeries(
-        new Date(2012, 0, 1).getTime(),
-        new Date(2012, 5, 1).getTime(),
-        1000
-      ).should.deep.equal([
-        ["2012-01", new Date(2012, 0, 1).getTime()],
-        ["2012-02", new Date(2012, 1, 1).getTime()],
-        ["2012-03", new Date(2012, 2, 1).getTime()],
-        ["2012-04", new Date(2012, 3, 1).getTime()],
-        ["2012-05", new Date(2012, 4, 1).getTime()],
-        ["2012-06", new Date(2012, 5, 1).getTime()]
-      ])
-    it 'should generate day intervals', ->
-      Morris.labelSeries(
-        new Date(2012, 0, 1).getTime(),
-        new Date(2012, 0, 6).getTime(),
-        1000
-      ).should.deep.equal([
-        ["2012-01-01", new Date(2012, 0, 1).getTime()],
-        ["2012-01-02", new Date(2012, 0, 2).getTime()],
-        ["2012-01-03", new Date(2012, 0, 3).getTime()],
-        ["2012-01-04", new Date(2012, 0, 4).getTime()],
-        ["2012-01-05", new Date(2012, 0, 5).getTime()],
-        ["2012-01-06", new Date(2012, 0, 6).getTime()]
-      ])
-    it 'should generate hour intervals', ->
-      Morris.labelSeries(
-        new Date(2012, 0, 1, 0).getTime(),
-        new Date(2012, 0, 1, 5).getTime(),
-        1000
-      ).should.deep.equal([
-        ["00:00", new Date(2012, 0, 1, 0).getTime()],
-        ["01:00", new Date(2012, 0, 1, 1).getTime()],
-        ["02:00", new Date(2012, 0, 1, 2).getTime()],
-        ["03:00", new Date(2012, 0, 1, 3).getTime()],
-        ["04:00", new Date(2012, 0, 1, 4).getTime()],
-        ["05:00", new Date(2012, 0, 1, 5).getTime()]
-      ])
-    it 'should generate half-hour intervals', ->
-      Morris.labelSeries(
-        new Date(2012, 0, 1, 0, 0).getTime(),
-        new Date(2012, 0, 1, 2, 30).getTime(),
-        1000
-      ).should.deep.equal([
-        ["00:00", new Date(2012, 0, 1, 0, 0).getTime()],
-        ["00:30", new Date(2012, 0, 1, 0, 30).getTime()],
-        ["01:00", new Date(2012, 0, 1, 1, 0).getTime()],
-        ["01:30", new Date(2012, 0, 1, 1, 30).getTime()],
-        ["02:00", new Date(2012, 0, 1, 2, 0).getTime()],
-        ["02:30", new Date(2012, 0, 1, 2, 30).getTime()]
-      ])
-      Morris.labelSeries(
-        new Date(2012, 4, 12, 0, 0).getTime(),
-        new Date(2012, 4, 12, 2, 30).getTime(),
-        1000
-      ).should.deep.equal([
-        ["00:00", new Date(2012, 4, 12, 0, 0).getTime()],
-        ["00:30", new Date(2012, 4, 12, 0, 30).getTime()],
-        ["01:00", new Date(2012, 4, 12, 1, 0).getTime()],
-        ["01:30", new Date(2012, 4, 12, 1, 30).getTime()],
-        ["02:00", new Date(2012, 4, 12, 2, 0).getTime()],
-        ["02:30", new Date(2012, 4, 12, 2, 30).getTime()]
-      ])
-    it 'should generate fifteen-minute intervals', ->
-      Morris.labelSeries(
-        new Date(2012, 0, 1, 0, 0).getTime(),
-        new Date(2012, 0, 1, 1, 15).getTime(),
-        1000
-      ).should.deep.equal([
-        ["00:00", new Date(2012, 0, 1, 0, 0).getTime()],
-        ["00:15", new Date(2012, 0, 1, 0, 15).getTime()],
-        ["00:30", new Date(2012, 0, 1, 0, 30).getTime()],
-        ["00:45", new Date(2012, 0, 1, 0, 45).getTime()],
-        ["01:00", new Date(2012, 0, 1, 1, 0).getTime()],
-        ["01:15", new Date(2012, 0, 1, 1, 15).getTime()]
-      ])
-      Morris.labelSeries(
-        new Date(2012, 4, 12, 0, 0).getTime(),
-        new Date(2012, 4, 12, 1, 15).getTime(),
-        1000
-      ).should.deep.equal([
-        ["00:00", new Date(2012, 4, 12, 0, 0).getTime()],
-        ["00:15", new Date(2012, 4, 12, 0, 15).getTime()],
-        ["00:30", new Date(2012, 4, 12, 0, 30).getTime()],
-        ["00:45", new Date(2012, 4, 12, 0, 45).getTime()],
-        ["01:00", new Date(2012, 4, 12, 1, 0).getTime()],
-        ["01:15", new Date(2012, 4, 12, 1, 15).getTime()]
-      ])
-    it 'should override automatic intervals', ->
-      Morris.labelSeries(
-        new Date(2011, 11, 12).getTime(),
-        new Date(2012, 0, 12).getTime(),
-        1000,
-        "year"
-      ).should.deep.equal([
-        ["2012", new Date(2012, 0, 1).getTime()]
-      ])
-    it 'should apply custom formatters', ->
-      Morris.labelSeries(
-        new Date(2012, 0, 1).getTime(),
-        new Date(2012, 0, 6).getTime(),
-        1000,
-        "day",
-        (d) -> "#{d.getMonth()+1}/#{d.getDate()}/#{d.getFullYear()}"
-      ).should.deep.equal([
-        ["1/1/2012", new Date(2012, 0, 1).getTime()],
-        ["1/2/2012", new Date(2012, 0, 2).getTime()],
-        ["1/3/2012", new Date(2012, 0, 3).getTime()],
-        ["1/4/2012", new Date(2012, 0, 4).getTime()],
-        ["1/5/2012", new Date(2012, 0, 5).getTime()],
-        ["1/6/2012", new Date(2012, 0, 6).getTime()]
-      ])