Helper API refactor (#40)

* api cleaup

* updates

* wtf

* updates

* snapshot.

* tweaks

* snapshot

* api tweaks.

* updates

* updates

* updates

* changes.

* updates

* updates

* sequence => seq

* dont need to use curl, just using wget

* fixing examples

seq/linear_test.go

@@ -0,0 +1,48 @@
+package seq
+
+import (
+	"testing"
+
+	assert "github.com/blendlabs/go-assert"
+)
+
+func TestRange(t *testing.T) {
+	assert := assert.New(t)
+
+	values := Range(1, 100)
+	assert.Len(values, 100)
+	assert.Equal(1, values[0])
+	assert.Equal(100, values[99])
+}
+
+func TestRangeWithStep(t *testing.T) {
+	assert := assert.New(t)
+
+	values := RangeWithStep(0, 100, 5)
+	assert.Equal(100, values[20])
+	assert.Len(values, 21)
+}
+
+func TestRangeReversed(t *testing.T) {
+	assert := assert.New(t)
+
+	values := Range(10.0, 1.0)
+	assert.Equal(10, len(values))
+	assert.Equal(10.0, values[0])
+	assert.Equal(1.0, values[9])
+}
+
+func TestValuesRegression(t *testing.T) {
+	assert := assert.New(t)
+
+	// note; this assumes a 1.0 step is implicitly set in the constructor.
+	linearProvider := NewLinear().WithStart(1.0).WithEnd(100.0)
+	assert.Equal(1, linearProvider.Start())
+	assert.Equal(100, linearProvider.End())
+	assert.Equal(100, linearProvider.Len())
+
+	values := Seq{Provider: linearProvider}.Array()
+	assert.Len(values, 100)
+	assert.Equal(1.0, values[0])
+	assert.Equal(100, values[99])
+}