[Go] Add OTF Json Printer

gocode/src/flyweight/otf/json_test.go

@@ -0,0 +1,114 @@
+package otf
+
+import (
+	"github.com/real-logic/simple-binary-encoding/json"
+	"github.com/real-logic/simple-binary-encoding/otf"
+	"github.com/real-logic/simple-binary-encoding/otf/test/code_generation_test"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestJson(t *testing.T) {
+	assert := assert.New(t)
+
+	ir := otf.NewIrDecoder()
+	if ir.DecodeFile(SchemaFilename) < 0 {
+		t.Errorf("Error decoding %s", SchemaFilename)
+		t.Fail()
+	}
+	printer, err := json.NewJsonPrinter(ir)
+	assert.NoErrorf(err, "Error creating JsonPrinter: %v", err)
+	assert.NotNil(printer)
+
+	var car code_generation_test.Car
+	buffer := make([]byte, MsgBufferCapacity)
+	encodeCar(&car, buffer)
+
+	headerDecoder, _ := otf.NewOtfHeaderDecoder(ir.Header())
+	bufferOffset := 0
+	schemaId, _ := headerDecoder.SchemaId(buffer[bufferOffset:])
+
+	if uint16(schemaId) != car.SbeSchemaId() {
+		t.Errorf("Invalid schema id: %d", schemaId)
+	}
+
+	str, err := printer.PrintJson(buffer)
+	assert.NoErrorf(err, "Error printing JSON: %v", err)
+	expected := `{
+    "serialNumber": 1234,
+    "modelYear": 2013,
+    "available": "T",
+    "code": "A",
+    "someNumbers": [0, 1, 2, 3, 4],
+    "vehicleCode": ["a", "b", "c", "d", "e", "f"],
+    "extras": { "sunRoof": false, "sportsPack": false, "cruiseControl": false },
+    "discountedModel": "C",
+    "Engine": 
+    {
+        "capacity": 2000,
+        "numCylinders": 4,
+        "maxRpm": "9000",
+        "manufacturerCode": ["1", "2", "3"],
+        "fuel": "Petrol",
+        "booster": 
+        {
+            "BoostType": "NITROUS",
+            "horsePower": 200
+        }
+    },
+    "fuelFigures": [
+    {
+        "speed": 30,
+        "mpg": 35.900001525878906,
+        "usageDescription": "Urban Cycle"
+    },
+    {
+        "speed": 55,
+        "mpg": 49,
+        "usageDescription": "Combined Cycle"
+    },
+    {
+        "speed": 75,
+        "mpg": 40,
+        "usageDescription": "Highway Cycle"
+    }],
+    "performanceFigures": [
+    {
+        "octaneRating": 95,
+        "acceleration": [
+        {
+            "mph": 30,
+            "seconds": 4
+        },
+        {
+            "mph": 60,
+            "seconds": 7.5
+        },
+        {
+            "mph": 100,
+            "seconds": 12.199999809265137
+        }]
+    },
+    {
+        "octaneRating": 99,
+        "acceleration": [
+        {
+            "mph": 30,
+            "seconds": 3.799999952316284
+        },
+        {
+            "mph": 60,
+            "seconds": 7.099999904632568
+        },
+        {
+            "mph": 100,
+            "seconds": 11.800000190734863
+        }]
+    }],
+    "manufacturer": "Honda",
+    "model": "Civic VTi",
+    "activationCode": "abcdef",
+    "color": ""
+}`
+	assert.EqualValues(expected, str, "Message printer")
+}