Create integration tests (vesoft-inc#201)

* add build tag for integration tests

* add unit rule to run unit tests

* add unit as phony

* improve formatting of each _test file, enable coverate on functional tests

* add badge for test results

Makefile

@@ -1,14 +1,16 @@
-.PHONY: build test fmt up up-ssl down ssl-test run-examples
+.PHONY: build unit test fmt up up-ssl down ssl-test run-examples
 
 default: build
 
 build: fmt
 	go mod tidy
 	go build
-
+unit:
+	go mod tidy
+	go test -v -race --covermode=atomic --coverprofile coverage.out
 test:
 	go mod tidy
-	go test -v -race
+	go test -v -race --tags=integration --covermode=atomic --coverprofile coverage.out
 
 fmt:
 	go fmt
@@ -22,10 +24,10 @@ down:
 	cd ./nebula-docker-compose && docker-compose down -v
 
 ssl-test:
-	ssl_test=true go test -v -run TestSslConnection;
+	ssl_test=true go test -v --tags=integration -run TestSslConnection;
 
 ssl-test-self-signed:
-	self_signed=true go test -v -run TestSslConnection;
+	self_signed=true go test -v --tags=integration -run TestSslConnection;
 
 run-examples:
 	go run basic_example/graph_client_basic_example.go && \

README.md

@@ -1,5 +1,7 @@
 # nebula-go
+
 [![Go Reference](https://pkg.go.dev/badge/github.com/vesoft-inc/nebula-go/v3.svg)](https://pkg.go.dev/github.com/vesoft-inc/nebula-go/v3)
+![functional tests](https://github.com/vesoft-inc/nebula-go/actions/workflows/test.yaml/badge.svg)
 
 **IMPORTANT: Code of Nebula go client has been transferred from [nebula-clients](https://github.com/vesoft-inc/nebula-clients) to this repository(nebula-go), and new releases in the future will be published in this repository.
 Please update your go.mod and imports correspondingly.**
@@ -19,7 +21,6 @@ To Use the console with a stable release of Nebula Graph, please check the branc
 |   **[v3.1.x](https://github.com/vesoft-inc/nebula-go/tree/v3.1.0)**      |       3.1.x    |
 |   **[master](https://github.com/vesoft-inc/nebula-go/tree/master)**     |       3.x-nightly |
 
-
 Please be careful not to modify the files in the nebula directory, these codes were all generated by fbthrift.
 
 **NOTE** Installing Nebula Go v2.5.0 could cause **checksum mismatch**, use v2.5.1 instead.
@@ -29,18 +30,21 @@ Please be careful not to modify the files in the nebula directory, these codes w
 ```shell
 $ go get -u -v github.com/vesoft-inc/nebula-go/v3@master
 ```
+
 You can specify the version of Nebula-go by substituting `<tag>` in `$ go get -u -v github.com/vesoft-inc/nebula-go@<tag>`.
-For example: 
-    
-    for v3: `$ go get -u -v github.com/vesoft-inc/nebula-go/[email protected]`
-    for v2: `$ go get -u -v github.com/vesoft-inc/nebula-go/[email protected]`
+For example:
+
+  for v3: `$ go get -u -v github.com/vesoft-inc/nebula-go/[email protected]`
+  for v2: `$ go get -u -v github.com/vesoft-inc/nebula-go/[email protected]`
 
 **Note**: You will get a message like this if you don't specify a tag:
-> ```
+
+> ```shell
 > $ go get -u -v github.com/vesoft-inc/nebula-go/v2@master
 > go: github.com/vesoft-inc/nebula-go/v2 master => v2.0.0-20210506025434-97d4168c5c4d
 > ```
-> Here the ` 20210506025434-97d4168c5c4d` is a version tag auto-generated by Github using commit date and SHA.
+>
+> Here the `20210506025434-97d4168c5c4d` is a version tag auto-generated by Github using commit date and SHA.
 > This should match the latest commit in the master branch.
 
 ## Usage example

client_test.go

@@ -1,11 +1,13 @@
+//go:build integration
+// +build integration
+
 /*
  *
  * Copyright (c) 2020 vesoft inc. All rights reserved.
  *
  * This source code is licensed under Apache 2.0 License.
  *
  */
-
 package nebula_go
 
 import (

session_test.go

@@ -1,3 +1,6 @@
+//go:build integration
+// +build integration
+
 /* Copyright (c) 2021 vesoft inc. All rights reserved.
  *
  * This source code is licensed under Apache 2.0 License.

ssl_connection_test.go

@@ -1,3 +1,6 @@
+//go:build integration
+// +build integration
+
 /*
  *
  * Copyright (c) 2020 vesoft inc. All rights reserved.