fix: rework http support

Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>

record/traverse_test.go

@@ -0,0 +1,75 @@
+package record
+
+import (
+	"testing"
+
+	F "github.com/ibm/fp-go/function"
+	O "github.com/ibm/fp-go/option"
+	"github.com/stretchr/testify/assert"
+)
+
+type MapType = map[string]int
+type MapTypeString = map[string]string
+type MapTypeO = map[string]O.Option[int]
+
+func TestSimpleTraversalWithIndex(t *testing.T) {
+
+	f := func(k string, n int) O.Option[int] {
+		if k != "a" {
+			return O.Some(n)
+		}
+		return O.None[int]()
+	}
+
+	tWithIndex := TraverseWithIndex(
+		O.Of[MapType],
+		O.Map[MapType, func(int) MapType],
+		O.Ap[MapType, int],
+		f)
+
+	assert.Equal(t, O.None[MapType](), F.Pipe1(MapType{"a": 1, "b": 2}, tWithIndex))
+	assert.Equal(t, O.Some(MapType{"b": 2}), F.Pipe1(MapType{"b": 2}, tWithIndex))
+}
+
+func TestSimpleTraversalNoIndex(t *testing.T) {
+
+	f := func(k string) O.Option[string] {
+		if k != "1" {
+			return O.Some(k)
+		}
+		return O.None[string]()
+	}
+
+	tWithoutIndex := Traverse(
+		O.Of[MapTypeString],
+		O.Map[MapTypeString, func(string) MapTypeString],
+		O.Ap[MapTypeString, string],
+		f)
+
+	assert.Equal(t, O.None[MapTypeString](), F.Pipe1(MapTypeString{"a": "1", "b": "2"}, tWithoutIndex))
+	assert.Equal(t, O.Some(MapTypeString{"b": "2"}), F.Pipe1(MapTypeString{"b": "2"}, tWithoutIndex))
+}
+
+func TestSequence(t *testing.T) {
+	// source map
+	simpleMapO := MapTypeO{"a": O.Of(1), "b": O.Of(2)}
+	// convert to an option of record
+
+	s := Traverse(
+		O.Of[MapType],
+		O.Map[MapType, func(int) MapType],
+		O.Ap[MapType, int],
+		F.Identity[O.Option[int]],
+	)
+
+	assert.Equal(t, O.Of(MapType{"a": 1, "b": 2}), F.Pipe1(simpleMapO, s))
+
+	s1 := Sequence(
+		O.Of[MapType],
+		O.Map[MapType, func(int) MapType],
+		O.Ap[MapType, int],
+		simpleMapO,
+	)
+
+	assert.Equal(t, O.Of(MapType{"a": 1, "b": 2}), s1)
+}