package chart import ( "testing" "time" "github.com/blendlabs/go-assert" ) func TestMinAndMax(t *testing.T) { assert := assert.New(t) values := []float64{1.0, 2.0, 3.0, 4.0} min, max := Math.MinAndMax(values...) assert.Equal(1.0, min) assert.Equal(4.0, max) } func TestMinAndMaxReversed(t *testing.T) { assert := assert.New(t) values := []float64{4.0, 2.0, 3.0, 1.0} min, max := Math.MinAndMax(values...) assert.Equal(1.0, min) assert.Equal(4.0, max) } func TestMinAndMaxEmpty(t *testing.T) { assert := assert.New(t) values := []float64{} min, max := Math.MinAndMax(values...) assert.Equal(0.0, min) assert.Equal(0.0, max) } func TestMinAndMaxOfTime(t *testing.T) { assert := assert.New(t) values := []time.Time{ time.Now().AddDate(0, 0, -1), time.Now().AddDate(0, 0, -2), time.Now().AddDate(0, 0, -3), time.Now().AddDate(0, 0, -4), } min, max := Math.MinAndMaxOfTime(values...) assert.Equal(values[3], min) assert.Equal(values[0], max) } func TestMinAndMaxOfTimeReversed(t *testing.T) { assert := assert.New(t) values := []time.Time{ time.Now().AddDate(0, 0, -4), time.Now().AddDate(0, 0, -2), time.Now().AddDate(0, 0, -3), time.Now().AddDate(0, 0, -1), } min, max := Math.MinAndMaxOfTime(values...) assert.Equal(values[0], min) assert.Equal(values[3], max) } func TestMinAndMaxOfTimeEmpty(t *testing.T) { assert := assert.New(t) values := []time.Time{} min, max := Math.MinAndMaxOfTime(values...) assert.Equal(time.Time{}, min) assert.Equal(time.Time{}, max) } func TestGetRoundToForDelta(t *testing.T) { assert := assert.New(t) assert.Equal(100.0, Math.GetRoundToForDelta(1001.00)) assert.Equal(10.0, Math.GetRoundToForDelta(101.00)) assert.Equal(1.0, Math.GetRoundToForDelta(11.00)) } func TestRoundUp(t *testing.T) { assert := assert.New(t) assert.Equal(0.5, Math.RoundUp(0.49, 0.1)) assert.Equal(1.0, Math.RoundUp(0.51, 1.0)) assert.Equal(0.4999, Math.RoundUp(0.49988, 0.0001)) } func TestRoundDown(t *testing.T) { assert := assert.New(t) assert.Equal(0.5, Math.RoundDown(0.51, 0.1)) assert.Equal(1.0, Math.RoundDown(1.01, 1.0)) assert.Equal(0.5001, Math.RoundDown(0.50011, 0.0001)) } func TestPercentDifference(t *testing.T) { assert := assert.New(t) assert.Equal(0.5, Math.PercentDifference(1.0, 1.5)) assert.Equal(-0.5, Math.PercentDifference(2.0, 1.0)) } func TestNormalize(t *testing.T) { assert := assert.New(t) values := []float64{10, 9, 8, 7, 6} normalized := Math.Normalize(values...) assert.Len(normalized, 5) assert.Equal(0.25, normalized[0]) assert.Equal(0.1499, normalized[4]) } var ( _degreesToRadians = map[float64]float64{ 0: 0, // !_2pi b/c no irrational nums in floats. 45: _pi4, 90: _pi2, 135: _3pi4, 180: _pi, 225: _5pi4, 270: _3pi2, 315: _7pi4, } _compassToRadians = map[float64]float64{ 0: _pi2, 45: _pi4, 90: 0, // !_2pi b/c no irrational nums in floats. 135: _7pi4, 180: _3pi2, 225: _5pi4, 270: _pi, 315: _3pi4, } ) func TestDegreesToRadians(t *testing.T) { assert := assert.New(t) for d, r := range _degreesToRadians { assert.Equal(r, Math.DegreesToRadians(d)) } } func TestPercentToRadians(t *testing.T) { assert := assert.New(t) for d, r := range _degreesToRadians { assert.Equal(r, Math.PercentToRadians(d/360.0)) } } func TestRadiansToDegrees(t *testing.T) { assert := assert.New(t) for d, r := range _degreesToRadians { assert.Equal(d, Math.RadiansToDegrees(r)) } } func TestRadianAdd(t *testing.T) { assert := assert.New(t) assert.Equal(_pi, Math.RadianAdd(_pi2, _pi2)) assert.Equal(_3pi2, Math.RadianAdd(_pi2, _pi)) assert.Equal(_pi, Math.RadianAdd(_pi, _2pi)) assert.Equal(_pi, Math.RadianAdd(_pi, -_2pi)) }