add read-body example

Former-commit-id: 7d7afa555e66fbe7edfa31203c26b4b550f336f4

_examples/http_request/read-body/main_test.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/kataras/iris/v12/httptest"
+)
+
+func TestReadBodyAndNegotiate(t *testing.T) {
+	app := newApp()
+
+	e := httptest.New(t, app)
+
+	var (
+		expectedPayload        = payload{Message: "a message"}
+		expectedMsgPackPayload = "\x81\xa7message\xa9a message"
+		expectedXMLPayload     = `<payload>
+  <message>a message</message>
+</payload>
+`
+		expectedYAMLPayload = "Message: a message\n"
+	)
+
+	// Test send JSON and receive JSON.
+	e.POST("/").WithJSON(expectedPayload).Expect().Status(httptest.StatusOK).
+		JSON().Equal(expectedPayload)
+
+	// Test send Form and receive XML.
+	e.POST("/").WithForm(expectedPayload).
+		WithHeader("Accept", "application/xml").
+		Expect().Status(httptest.StatusOK).
+		Body().Equal(expectedXMLPayload)
+
+	// Test send URL Query and receive MessagePack.
+	e.POST("/").WithQuery("message", expectedPayload.Message).
+		WithHeader("Accept", "application/msgpack").
+		Expect().Status(httptest.StatusOK).ContentType("application/msgpack").
+		Body().Equal(expectedMsgPackPayload)
+
+	// Test send MessagePack and receive MessagePack.
+	e.POST("/").WithBytes([]byte(expectedMsgPackPayload)).
+		WithHeader("Content-Type", "application/msgpack").
+		WithHeader("Accept", "application/msgpack").
+		Expect().Status(httptest.StatusOK).
+		ContentType("application/msgpack").Body().Equal(expectedMsgPackPayload)
+
+	// Test send YAML and receive YAML.
+	e.POST("/").WithBytes([]byte(expectedYAMLPayload)).
+		WithHeader("Content-Type", "application/x-yaml").
+		WithHeader("Accept", "application/x-yaml").
+		Expect().Status(httptest.StatusOK).
+		ContentType("application/x-yaml").Body().Equal(expectedYAMLPayload)
+}