feat: add Stream package

stream/stream_test.go

@@ -0,0 +1,25 @@
+package stream
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/v2/internal"
+)
+
+func TestFromSlice(t *testing.T) {
+	assert := internal.NewAssert(t, "TestFromSlice")
+
+	stream := FromSlice([]int{1, 2, 3})
+
+	assert.Equal([]int{1, 2, 3}, stream.ToSlice())
+}
+
+func TestFromRange(t *testing.T) {
+	assert := internal.NewAssert(t, "TestFromSlice")
+
+	s1 := FromRange(1, 5, 1)
+	s2 := FromRange(1.1, 5.0, 1.0)
+
+	assert.Equal([]int{1, 2, 3, 4, 5}, s1.ToSlice())
+	assert.Equal([]float64{1.1, 2.1, 3.1, 4.1}, s2.ToSlice())
+}