Add Microsoft Application Insights output plugin (#4010)

plugins/outputs/application_insights/mocks/transmitter.go

@@ -0,0 +1,32 @@
+// Code generated by mockery v1.0.0
+package mocks
+
+import appinsights "github.com/Microsoft/ApplicationInsights-Go/appinsights"
+
+import mock "github.com/stretchr/testify/mock"
+
+// Transmitter is an autogenerated mock type for the Transmitter type
+type Transmitter struct {
+	mock.Mock
+}
+
+// Close provides a mock function with given fields:
+func (_m *Transmitter) Close() <-chan struct{} {
+	ret := _m.Called()
+
+	var r0 <-chan struct{}
+	if rf, ok := ret.Get(0).(func() <-chan struct{}); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(<-chan struct{})
+		}
+	}
+
+	return r0
+}
+
+// Track provides a mock function with given fields: _a0
+func (_m *Transmitter) Track(_a0 appinsights.Telemetry) {
+	_m.Called(_a0)
+}