MM-14559 Rewrite existing plugin API tests to exclusively test via actual plugin (#10494)

* initial work on rewriting test cases using the raw literal format

* split out the embedded tests into separate file and implement the test using a generic tester function

* initial work on rewriting test cases using the raw literal format

* split out the embedded tests into separate file and implement the test using a generic tester function

* moved tests to separate dir to avoid conflicts

* removed duplicate files

* added license header

* fixed plugin paths

* moved all trivial tests to separate files
created "meta-test" that scans a folder of api tests and runs them

* remove rpc tests from make

* use fileutil.FindDir instead of pwd
clean up the test files

Makefile

@@ -70,7 +70,7 @@ TESTFLAGS ?= -short
 TESTFLAGSEE ?= -short
 
 # Packages lists
-TE_PACKAGES=$(shell go list ./...)
+TE_PACKAGES=$(shell go list ./...|grep -v plugin_tests)
 
 # Plugins Packages
 PLUGIN_PACKAGES=mattermost-plugin-zoom mattermost-plugin-jira

app/plugin_api_test.go

@@ -6,20 +6,23 @@ package app
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
+	"github.com/mattermost/mattermost-server/utils/fileutils"
 	"image"
 	"image/color"
 	"image/png"
 	"io/ioutil"
 	"os"
+	"path"
 	"path/filepath"
 	"strings"
 	"testing"
+	"text/template"
 	"time"
 
 	"github.com/mattermost/mattermost-server/model"
 	"github.com/mattermost/mattermost-server/plugin"
-	"github.com/mattermost/mattermost-server/services/mailservice"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -243,25 +246,6 @@ func TestPluginAPIGetUsersInTeam(t *testing.T) {
 	}
 }
 
-func TestPluginAPIUpdateUserStatus(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	statuses := []string{model.STATUS_ONLINE, model.STATUS_AWAY, model.STATUS_DND, model.STATUS_OFFLINE}
-
-	for _, s := range statuses {
-		status, err := api.UpdateUserStatus(th.BasicUser.Id, s)
-		require.Nil(t, err)
-		require.NotNil(t, status)
-		assert.Equal(t, s, status.Status)
-	}
-
-	status, err := api.UpdateUserStatus(th.BasicUser.Id, "notrealstatus")
-	assert.NotNil(t, err)
-	assert.Nil(t, status)
-}
-
 func TestPluginAPIGetFile(t *testing.T) {
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
@@ -376,45 +360,12 @@ func TestPluginAPILoadPluginConfiguration(t *testing.T) {
 	th.App.UpdateConfig(func(cfg *model.Config) {
 		cfg.PluginSettings.Plugins["testloadpluginconfig"] = pluginJson
 	})
-	setupPluginApiTest(t,
-		`
-		package main
 
-		import (
-			"github.com/mattermost/mattermost-server/plugin"
-			"github.com/mattermost/mattermost-server/model"
-			"fmt"
-		)
+	testFolder, found := fileutils.FindDir("tests")
+	require.True(t, found, "Cannot find tests folder")
+	fullPath := path.Join(testFolder, "plugin_tests", "manual.test_load_configuration_plugin", "main.go")
 
-		type configuration struct {
-			MyStringSetting string
-			MyIntSetting int
-			MyBoolSetting bool
-		}
-
-		type MyPlugin struct {
-			plugin.MattermostPlugin
-
-			configuration configuration
-		}
-
-		func (p *MyPlugin) OnConfigurationChange() error {
-			if err := p.API.LoadPluginConfiguration(&p.configuration); err != nil {
-				return err
-			}
-
-			return nil
-		}
-
-		func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
-			return nil, fmt.Sprintf("%v%v%v", p.configuration.MyStringSetting, p.configuration.MyIntSetting, p.configuration.MyBoolSetting)
-		}
-
-		func main() {
-			plugin.ClientMain(&MyPlugin{})
-		}
-	`,
-		`{"id": "testloadpluginconfig", "backend": {"executable": "backend.exe"}, "settings_schema": {
+	err := pluginAPIHookTest(t, th, fullPath, "testloadpluginconfig", nil, `{"id": "testloadpluginconfig", "backend": {"executable": "backend.exe"}, "settings_schema": {
 		"settings": [
 			{
 				"key": "MyStringSetting",
@@ -429,11 +380,9 @@ func TestPluginAPILoadPluginConfiguration(t *testing.T) {
 				"type": "bool"
 			}
 		]
-	}}`, "testloadpluginconfig", th.App)
-	hooks, err := th.App.GetPluginsEnvironment().HooksForPlugin("testloadpluginconfig")
+	}}`)
 	assert.NoError(t, err)
-	_, ret := hooks.MessageWillBePosted(nil, nil)
-	assert.Equal(t, "str32true", ret)
+
 }
 
 func TestPluginAPILoadPluginConfigurationDefaults(t *testing.T) {
@@ -447,45 +396,12 @@ func TestPluginAPILoadPluginConfigurationDefaults(t *testing.T) {
 	th.App.UpdateConfig(func(cfg *model.Config) {
 		cfg.PluginSettings.Plugins["testloadpluginconfig"] = pluginJson
 	})
-	setupPluginApiTest(t,
-		`
-		package main
 
-		import (
-			"github.com/mattermost/mattermost-server/plugin"
-			"github.com/mattermost/mattermost-server/model"
-			"fmt"
-		)
+	testFolder, found := fileutils.FindDir("tests")
+	require.True(t, found, "Cannot find tests folder")
+	fullPath := path.Join(testFolder, "plugin_tests", "manual.test_load_configuration_defaults_plugin", "main.go")
 
-		type configuration struct {
-			MyStringSetting string
-			MyIntSetting int
-			MyBoolSetting bool
-		}
-
-		type MyPlugin struct {
-			plugin.MattermostPlugin
-
-			configuration configuration
-		}
-
-		func (p *MyPlugin) OnConfigurationChange() error {
-			if err := p.API.LoadPluginConfiguration(&p.configuration); err != nil {
-				return err
-			}
-
-			return nil
-		}
-
-		func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
-			return nil, fmt.Sprintf("%v%v%v", p.configuration.MyStringSetting, p.configuration.MyIntSetting, p.configuration.MyBoolSetting)
-		}
-
-		func main() {
-			plugin.ClientMain(&MyPlugin{})
-		}
-	`,
-		`{"id": "testloadpluginconfig", "backend": {"executable": "backend.exe"}, "settings_schema": {
+	err := pluginAPIHookTest(t, th, fullPath, "testloadpluginconfig", nil, `{
 		"settings": [
 			{
 				"key": "MyStringSetting",
@@ -503,98 +419,10 @@ func TestPluginAPILoadPluginConfigurationDefaults(t *testing.T) {
 				"default": true
 			}
 		]
-	}}`, "testloadpluginconfig", th.App)
-	hooks, err := th.App.GetPluginsEnvironment().HooksForPlugin("testloadpluginconfig")
+	}`)
+
 	assert.NoError(t, err)
-	_, ret := hooks.MessageWillBePosted(nil, nil)
-	assert.Equal(t, "override35true", ret)
-}
 
-func TestPluginAPIGetBundlePath(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-
-	setupPluginApiTest(t,
-		`
-		package main
-
-		import (
-			"github.com/mattermost/mattermost-server/plugin"
-			"github.com/mattermost/mattermost-server/model"
-		)
-
-		type MyPlugin struct {
-			plugin.MattermostPlugin
-		}
-
-		func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
-			bundlePath, err := p.API.GetBundlePath()
-			if err != nil {
-				return nil, err.Error() + "failed get bundle path"
-			}
-
-			return nil, bundlePath
-		}
-
-		func main() {
-			plugin.ClientMain(&MyPlugin{})
-		}
-		`, `{"id": "testplugin", "backend": {"executable": "backend.exe"}}`, "testplugin", th.App)
-
-	hooks, err := th.App.GetPluginsEnvironment().HooksForPlugin("testplugin")
-	require.Nil(t, err)
-	require.NotNil(t, hooks)
-	bundlePath, err := filepath.Abs(filepath.Join(*th.App.Config().PluginSettings.Directory, "testplugin"))
-	require.Nil(t, err)
-
-	_, errString := hooks.MessageWillBePosted(nil, nil)
-	assert.Equal(t, bundlePath, errString)
-}
-
-func TestPluginAPIGetProfileImage(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	// check existing user first
-	data, err := api.GetProfileImage(th.BasicUser.Id)
-	require.Nil(t, err)
-	require.NotEmpty(t, data)
-
-	// then unknown user
-	data, err = api.GetProfileImage(model.NewId())
-	require.NotNil(t, err)
-	require.Nil(t, data)
-}
-
-func TestPluginAPISetProfileImage(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	// Create an 128 x 128 image
-	img := image.NewRGBA(image.Rect(0, 0, 128, 128))
-	// Draw a red dot at (2, 3)
-	img.Set(2, 3, color.RGBA{255, 0, 0, 255})
-	buf := new(bytes.Buffer)
-	err := png.Encode(buf, img)
-	require.Nil(t, err)
-	dataBytes := buf.Bytes()
-
-	// Set the user profile image
-	err = api.SetProfileImage(th.BasicUser.Id, dataBytes)
-	require.Nil(t, err)
-
-	// Get the user profile image to check
-	imageProfile, err := api.GetProfileImage(th.BasicUser.Id)
-	require.Nil(t, err)
-	require.NotEmpty(t, imageProfile)
-
-	colorful := color.NRGBA{255, 0, 0, 255}
-	byteReader := bytes.NewReader(imageProfile)
-	img2, _, err2 := image.Decode(byteReader)
-	require.Nil(t, err2)
-	require.Equal(t, img2.At(2, 3), colorful)
 }
 
 func TestPluginAPIGetPlugins(t *testing.T) {
@@ -716,88 +544,6 @@ func TestPluginAPISetTeamIcon(t *testing.T) {
 	require.Equal(t, img2.At(2, 3), colorful)
 }
 
-func TestPluginAPISearchChannels(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	t.Run("all fine", func(t *testing.T) {
-		channels, err := api.SearchChannels(th.BasicTeam.Id, th.BasicChannel.Name)
-		assert.Nil(t, err)
-		assert.Len(t, channels, 1)
-	})
-
-	t.Run("invalid team id", func(t *testing.T) {
-		channels, err := api.SearchChannels("invalidid", th.BasicChannel.Name)
-		assert.Nil(t, err)
-		assert.Empty(t, channels)
-	})
-}
-
-func TestPluginAPISearchPostsInTeam(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	testCases := []struct {
-		description      string
-		teamId           string
-		params           []*model.SearchParams
-		expectedPostsLen int
-	}{
-		{
-			"nil params",
-			th.BasicTeam.Id,
-			nil,
-			0,
-		},
-		{
-			"empty params",
-			th.BasicTeam.Id,
-			[]*model.SearchParams{},
-			0,
-		},
-		{
-			"doesn't match any posts",
-			th.BasicTeam.Id,
-			model.ParseSearchParams("bad message", 0),
-			0,
-		},
-		{
-			"matched posts",
-			th.BasicTeam.Id,
-			model.ParseSearchParams(th.BasicPost.Message, 0),
-			1,
-		},
-	}
-
-	for _, testCase := range testCases {
-		t.Run(testCase.description, func(t *testing.T) {
-			posts, err := api.SearchPostsInTeam(testCase.teamId, testCase.params)
-			assert.Nil(t, err)
-			assert.Equal(t, testCase.expectedPostsLen, len(posts))
-		})
-	}
-}
-
-func TestPluginAPIGetChannelsForTeamForUser(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	t.Run("all fine", func(t *testing.T) {
-		channels, err := api.GetChannelsForTeamForUser(th.BasicTeam.Id, th.BasicUser.Id, false)
-		assert.Nil(t, err)
-		assert.Len(t, channels, 3)
-	})
-
-	t.Run("invalid team id", func(t *testing.T) {
-		channels, err := api.GetChannelsForTeamForUser("invalidid", th.BasicUser.Id, false)
-		assert.NotNil(t, err)
-		assert.Empty(t, channels)
-	})
-}
-
 func TestPluginAPIRemoveTeamIcon(t *testing.T) {
 	th := Setup(t).InitBasic()
 	defer th.TearDown()
@@ -821,276 +567,62 @@ func TestPluginAPIRemoveTeamIcon(t *testing.T) {
 	require.Nil(t, err)
 }
 
-func TestPluginAPIUpdateUserActive(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	err := api.UpdateUserActive(th.BasicUser.Id, true)
-	require.Nil(t, err)
-	user, err := api.GetUser(th.BasicUser.Id)
-	require.Nil(t, err)
-	require.Equal(t, int64(0), user.DeleteAt)
-
-	err = api.UpdateUserActive(th.BasicUser.Id, false)
-	require.Nil(t, err)
-	user, err = api.GetUser(th.BasicUser.Id)
-	require.Nil(t, err)
-	require.NotNil(t, user)
-	require.NotEqual(t, int64(0), user.DeleteAt)
-
-	err = api.UpdateUserActive(th.BasicUser.Id, true)
-	require.Nil(t, err)
-	err = api.UpdateUserActive(th.BasicUser.Id, true)
-	require.Nil(t, err)
-	user, err = api.GetUser(th.BasicUser.Id)
-	require.Nil(t, err)
-	require.Equal(t, int64(0), user.DeleteAt)
-}
-
-func TestPluginAPIGetDirectChannel(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	dm1, err := api.GetDirectChannel(th.BasicUser.Id, th.BasicUser2.Id)
-	require.Nil(t, err)
-	require.NotEmpty(t, dm1)
-
-	dm2, err := api.GetDirectChannel(th.BasicUser.Id, th.BasicUser.Id)
-	require.Nil(t, err)
-	require.NotEmpty(t, dm2)
-
-	dm3, err := api.GetDirectChannel(th.BasicUser.Id, model.NewId())
-	require.NotNil(t, err)
-	require.Empty(t, dm3)
-}
-
-func TestPluginAPISendMail(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	to := th.BasicUser.Email
-	subject := "testing plugin api sending email"
-	body := "this is a test."
-
-	err := api.SendMail(to, subject, body)
-	require.Nil(t, err)
-
-	// Check if we received the email
-	var resultsMailbox mailservice.JSONMessageHeaderInbucket
-	errMail := mailservice.RetryInbucket(5, func() error {
-		var err error
-		resultsMailbox, err = mailservice.GetMailBox(to)
-		return err
-	})
-	require.Nil(t, errMail)
-	require.NotZero(t, len(resultsMailbox))
-	require.True(t, strings.ContainsAny(resultsMailbox[len(resultsMailbox)-1].To[0], to))
-
-	resultsEmail, err1 := mailservice.GetMessageFromMailbox(to, resultsMailbox[len(resultsMailbox)-1].ID)
-	require.Nil(t, err1)
-	require.Equal(t, resultsEmail.Subject, subject)
-	require.Equal(t, resultsEmail.Body.Text, body)
-
-}
-
-func TestPluginAPI_SearchTeams(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-
-	api := th.SetupPluginAPI()
-
-	t.Run("all fine", func(t *testing.T) {
-		teams, err := api.SearchTeams(th.BasicTeam.Name)
-		assert.Nil(t, err)
-		assert.Len(t, teams, 1)
-
-		teams, err = api.SearchTeams(th.BasicTeam.DisplayName)
-		assert.Nil(t, err)
-		assert.Len(t, teams, 1)
-
-		teams, err = api.SearchTeams(th.BasicTeam.Name[:3])
-		assert.Nil(t, err)
-		assert.Len(t, teams, 1)
-	})
-
-	t.Run("invalid team name", func(t *testing.T) {
-		teams, err := api.SearchTeams("not found")
-		assert.Nil(t, err)
-		assert.Empty(t, teams)
-	})
-}
-
-func TestPluginBots(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-
-	setupPluginApiTest(t,
-		`
-		package main
-
-		import (
-			"github.com/mattermost/mattermost-server/plugin"
-			"github.com/mattermost/mattermost-server/model"
-		)
-
-		type MyPlugin struct {
-			plugin.MattermostPlugin
-		}
-
-		func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
-			createdBot, err := p.API.CreateBot(&model.Bot{
-				Username: "bot",
-				Description: "a plugin bot",
-			})
-			if err != nil {
-				return nil, err.Error() + "failed to create bot"
-			}
-
-			fetchedBot, err := p.API.GetBot(createdBot.UserId, false)
-			if err != nil {
-				return nil, err.Error() + "failed to get bot"
-			}
-			if fetchedBot.Description != "a plugin bot" {
-				return nil, "GetBot did not return the expected bot Description"
-			}
-			if fetchedBot.OwnerId != "testpluginbots" {
-				return nil, "GetBot did not return the expected bot OwnerId"
-			}
-
-			updatedDescription := createdBot.Description + ", updated"
-			patchedBot, err := p.API.PatchBot(createdBot.UserId, &model.BotPatch{
-				Description: &updatedDescription,
-			})
-			if err != nil {
-				return nil, err.Error() + "failed to patch bot"
-			}
-
-			fetchedBot, err = p.API.GetBot(patchedBot.UserId, false)
-			if err != nil {
-				return nil, err.Error() + "failed to get bot"
-			}
-
-			if fetchedBot.UserId != patchedBot.UserId {
-				return nil, "GetBot did not return the expected bot"
-			}
-			if fetchedBot.Description != "a plugin bot, updated" {
-				return nil, "GetBot did not return the updated bot Description"
-			}
-
-			fetchedBots, err := p.API.GetBots(&model.BotGetOptions{
-				Page: 0,
-				PerPage: 1,
-				OwnerId: "",
-				IncludeDeleted: false,
-			})
-			if err != nil {
-				return nil, err.Error() + "failed to get bots"
-			}
-
-			if len(fetchedBots) != 1 {
-				return nil, "GetBots did not return a single bot"
-			}
-			if fetchedBot.UserId != fetchedBots[0].UserId {
-				return nil, "GetBots did not return the expected bot"
-			}
-
-			_, err = p.API.UpdateBotActive(fetchedBot.UserId, false)
-			if err != nil {
-				return nil, err.Error() + "failed to disable bot"
-			}
-
-			fetchedBot, err = p.API.GetBot(patchedBot.UserId, false)
-			if err == nil {
-				return nil, "expected not to find disabled bot"
-			}
-
-			_, err = p.API.UpdateBotActive(fetchedBot.UserId, true)
-			if err != nil {
-				return nil, err.Error() + "failed to disable bot"
-			}
-
-			fetchedBot, err = p.API.GetBot(patchedBot.UserId, false)
-			if err != nil {
-				return nil, err.Error() + "failed to get bot after enabling"
-			}
-			if fetchedBot.UserId != patchedBot.UserId {
-				return nil, "GetBot did not return the expected bot after enabling"
-			}
-
-			err = p.API.PermanentDeleteBot(patchedBot.UserId)
-			if err != nil {
-				return nil, err.Error() + "failed to delete bot"
-			}
-
-			_, err = p.API.GetBot(patchedBot.UserId, false)
-			if err == nil {
-				return nil, err.Error() + "found bot after permanently deleting"
-			}
-
-			createdBotWithOverriddenCreator, err := p.API.CreateBot(&model.Bot{
-				Username: "bot",
-				Description: "a plugin bot",
-				OwnerId: "abc123",
-			})
-			if err != nil {
-				return nil, err.Error() + "failed to create bot with overridden creator"
-			}
-
-			fetchedBot, err = p.API.GetBot(createdBotWithOverriddenCreator.UserId, false)
-			if err != nil {
-				return nil, err.Error() + "failed to get bot"
-			}
-			if fetchedBot.Description != "a plugin bot" {
-				return nil, "GetBot did not return the expected bot Description"
-			}
-			if fetchedBot.OwnerId != "abc123" {
-				return nil, "GetBot did not return the expected bot OwnerId"
-			}
-
-			return nil, ""
-		}
-
-		func main() {
-			plugin.ClientMain(&MyPlugin{})
-		}
-		`,
-		`{"id": "testpluginbots", "backend": {"executable": "backend.exe"}}`,
-		"testpluginbots",
-		th.App,
-	)
-
-	hooks, err := th.App.GetPluginsEnvironment().HooksForPlugin("testpluginbots")
+func pluginAPIHookTest(t *testing.T, th *TestHelper, fileName string, id string, params map[string]interface{}, settingsSchema string) error {
+	tpl := template.Must(template.ParseFiles(fileName))
+	builder := &strings.Builder{}
+	if err := tpl.Execute(builder, params); err != nil {
+		panic(err)
+	}
+	code := builder.String()
+	schema := `{"settings": [ ]	}`
+	if settingsSchema != "" {
+		schema = settingsSchema
+	}
+	setupPluginApiTest(t, code,
+		fmt.Sprintf(`{"id": "%v", "backend": {"executable": "backend.exe"}, "settings_schema": %v}`, id, schema),
+		id, th.App)
+	hooks, err := th.App.GetPluginsEnvironment().HooksForPlugin(id)
 	assert.NoError(t, err)
-	_, errString := hooks.MessageWillBePosted(nil, nil)
-	assert.Empty(t, errString)
+	require.NotNil(t, hooks)
+	_, ret := hooks.MessageWillBePosted(nil, nil)
+	if ret != "" {
+		return errors.New(ret)
+	}
+	return nil
 }
 
-func TestPluginAPI_GetTeamMembersForUser(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
+// This is a meta-test function. It does the following:
+// 1. Scans "tests/plugin_tests" folder
+// 2. For each folder - compiles the main.go inside and executes it, validating it's result
+// 3. If folder starts with "manual." it is skipped ("manual." tests executed in other part of this file)
+// 4. Before compiling the main.go file is passed through templating and the following values are available in the template: BasicUser, BasicUser2, BasicChannel, BasicTeam, BasicPost
 
-	userId := th.BasicUser.Id
-	teamMembers, err := api.GetTeamMembersForUser(userId, 0, 10)
-	assert.Nil(t, err)
-	assert.Equal(t, len(teamMembers), 1)
-	assert.Equal(t, teamMembers[0].TeamId, th.BasicTeam.Id)
-	assert.Equal(t, teamMembers[0].UserId, th.BasicUser.Id)
-}
-
-func TestPluginAPI_GetChannelMembersForUser(t *testing.T) {
-	th := Setup(t).InitBasic()
-	defer th.TearDown()
-	api := th.SetupPluginAPI()
-
-	userId := th.BasicUser.Id
-	teamId := th.BasicTeam.Id
-	channelMembers, err := api.GetChannelMembersForUser(teamId, userId, 0, 10)
-
-	assert.Nil(t, err)
-	assert.Equal(t, len(channelMembers), 3)
-	assert.Equal(t, channelMembers[0].UserId, th.BasicUser.Id)
+func TestBasicAPIPlugins(t *testing.T) {
+	testFolder, found := fileutils.FindDir("tests")
+	require.True(t, found, "Cannot read find test folder")
+	fullPath := path.Join(testFolder, "plugin_tests")
+	dirs, err := ioutil.ReadDir(fullPath)
+	require.NoError(t, err, "Cannot read test folder %v", fullPath)
+	for _, dir := range dirs {
+		d := dir.Name()
+		if dir.IsDir() && !strings.HasPrefix(d, "manual.") {
+			t.Run(d, func(t *testing.T) {
+				mainPath := path.Join(fullPath, d, "main.go")
+				_, err := os.Stat(mainPath)
+				assert.NoError(t, err, "Cannot find plugin main file at %v", mainPath)
+				th := Setup(t).InitBasic()
+				defer th.TearDown()
+				params := map[string]interface{}{
+					"BasicUser":    th.BasicUser,
+					"BasicUser2":   th.BasicUser2,
+					"BasicChannel": th.BasicChannel,
+					"BasicTeam":    th.BasicTeam,
+					"BasicPost":    th.BasicPost,
+				}
+
+				err = pluginAPIHookTest(t, th, mainPath, dir.Name(), params, "")
+				assert.NoError(t, err)
+			})
+		}
+	}
 }

tests/plugin_tests/manual.test_load_configuration_defaults_plugin/main.go

@@ -0,0 +1,46 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type configuration struct {
+	MyStringSetting string
+	MyIntSetting    int
+	MyBoolSetting   bool
+}
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+
+	configuration configuration
+}
+
+func (p *MyPlugin) OnConfigurationChange() error {
+	if err := p.API.LoadPluginConfiguration(&p.configuration); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	if p.configuration.MyStringSetting != "override" {
+		return nil, "MyStringSetting has invalid value"
+	}
+	if p.configuration.MyIntSetting != 35 {
+		return nil, "MyIntSetting has invalid value"
+	}
+	if p.configuration.MyBoolSetting != true {
+		return nil, "MyBoolSetting has invalid value"
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/manual.test_load_configuration_plugin/main.go

@@ -0,0 +1,48 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type configuration struct {
+	MyStringSetting string
+	MyIntSetting    int
+	MyBoolSetting   bool
+}
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+
+	configuration configuration
+}
+
+func (p *MyPlugin) OnConfigurationChange() error {
+	if err := p.API.LoadPluginConfiguration(&p.configuration); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	if p.configuration.MyStringSetting != "str" {
+		return nil, "MyStringSetting has invalid value"
+	}
+	if p.configuration.MyIntSetting != 32 {
+		return nil, fmt.Sprintf("MyIntSetting has invalid value %v != %v", p.configuration.MyIntSetting, 32)
+	}
+	if p.configuration.MyBoolSetting != true {
+		return nil, "MyBoolSetting has invalid value"
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_bots_plugin/main.go

@@ -0,0 +1,117 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	createdBot, err := p.API.CreateBot(&model.Bot{
+		Username:    "bot",
+		Description: "a plugin bot",
+	})
+
+	if err != nil {
+		return nil, err.Error() + "failed to create bot"
+	}
+
+	fetchedBot, err := p.API.GetBot(createdBot.UserId, false)
+	if err != nil {
+		return nil, err.Error() + "failed to get bot"
+	}
+	if fetchedBot.Description != "a plugin bot" {
+		return nil, "GetBot did not return the expected bot Description"
+	}
+	if fetchedBot.OwnerId != "test_bots_plugin" {
+		return nil, "GetBot did not return the expected bot OwnerId"
+	}
+
+	updatedDescription := createdBot.Description + ", updated"
+	patchedBot, err := p.API.PatchBot(createdBot.UserId, &model.BotPatch{
+		Description: &updatedDescription,
+	})
+	if err != nil {
+		return nil, err.Error() + "failed to patch bot"
+	}
+
+	fetchedBot, err = p.API.GetBot(patchedBot.UserId, false)
+	if err != nil {
+		return nil, err.Error() + "failed to get bot"
+	}
+
+	if fetchedBot.UserId != patchedBot.UserId {
+		return nil, "GetBot did not return the expected bot"
+	}
+	if fetchedBot.Description != "a plugin bot, updated" {
+		return nil, "GetBot did not return the updated bot Description"
+	}
+
+	fetchedBots, err := p.API.GetBots(&model.BotGetOptions{
+		Page:           0,
+		PerPage:        1,
+		OwnerId:        "",
+		IncludeDeleted: false,
+	})
+	if err != nil {
+		return nil, err.Error() + "failed to get bots"
+	}
+
+	if len(fetchedBots) != 1 {
+		return nil, "GetBots did not return a single bot"
+	}
+
+	if fetchedBot.UserId != fetchedBots[0].UserId {
+		return nil, "GetBots did not return the expected bot"
+	}
+	if _, err = p.API.UpdateBotActive(fetchedBot.UserId, false); err != nil {
+		return nil, err.Error() + "failed to disable bot"
+	}
+	if fetchedBot, err = p.API.GetBot(patchedBot.UserId, false); err == nil {
+		return nil, "expected not to find disabled bot"
+	}
+	if _, err = p.API.UpdateBotActive(fetchedBot.UserId, true); err != nil {
+		return nil, err.Error() + "failed to disable bot"
+	}
+	if fetchedBot, err = p.API.GetBot(patchedBot.UserId, false); err != nil {
+		return nil, err.Error() + "failed to get bot after enabling"
+	}
+	if fetchedBot.UserId != patchedBot.UserId {
+		return nil, "GetBot did not return the expected bot after enabling"
+	}
+	if err = p.API.PermanentDeleteBot(patchedBot.UserId); err != nil {
+		return nil, err.Error() + "failed to delete bot"
+	}
+
+	if _, err = p.API.GetBot(patchedBot.UserId, false); err == nil {
+		return nil, err.Error() + "found bot after permanently deleting"
+	}
+	createdBotWithOverriddenCreator, err := p.API.CreateBot(&model.Bot{
+		Username:    "bot",
+		Description: "a plugin bot",
+		OwnerId:     "abc123",
+	})
+	if err != nil {
+		return nil, err.Error() + "failed to create bot with overridden creator"
+	}
+	if fetchedBot, err = p.API.GetBot(createdBotWithOverriddenCreator.UserId, false); err != nil {
+		return nil, err.Error() + "failed to get bot"
+	}
+	if fetchedBot.Description != "a plugin bot" {
+		return nil, "GetBot did not return the expected bot Description"
+	}
+	if fetchedBot.OwnerId != "abc123" {
+		return nil, "GetBot did not return the expected bot OwnerId"
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_get_bundle_path_plugin/main.go

@@ -0,0 +1,31 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"fmt"
+	"path/filepath"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	bundlePath, err := p.API.GetBundlePath()
+	if err != nil {
+		return nil, err.Error() + "failed get bundle path"
+	} else if bundlePathFromConfig, _ := filepath.Abs(filepath.Join(*p.API.GetConfig().PluginSettings.Directory, "test_get_bundle_path_plugin")); bundlePathFromConfig != bundlePath {
+		return nil, fmt.Sprintf("Invalid bundle path returned: %v vs %v", bundlePathFromConfig, bundlePath)
+	}
+
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_get_channels_for_team_for_user_plugin/main.go

@@ -0,0 +1,36 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+
+	channels, err := p.API.GetChannelsForTeamForUser("{{.BasicTeam.Id}}", "{{.BasicUser.Id}}", false)
+	if err != nil {
+		return nil, err.Error()
+	}
+	if len(channels) != 3 {
+		return nil, "Returned invalid number of channels"
+	}
+	channels, err = p.API.GetChannelsForTeamForUser("invalidid", "{{.BasicUser.Id}}", false)
+	if err == nil {
+		return nil, "Expected to get an error while retrieving channels for invalid id"
+	}
+	if len(channels) != 0 {
+		return nil, "Returned invalid number of channels"
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_get_direct_channel_plugin/main.go

@@ -0,0 +1,73 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"reflect"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func isEmpty(object interface{}) bool {
+
+	// get nil case out of the way
+	if object == nil {
+		return true
+	}
+
+	objValue := reflect.ValueOf(object)
+
+	switch objValue.Kind() {
+	// collection types are empty when they have no element
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		return objValue.Len() == 0
+	// pointers are empty if nil or if the value they point to is empty
+	case reflect.Ptr:
+		if objValue.IsNil() {
+			return true
+		}
+		deref := objValue.Elem().Interface()
+		return isEmpty(deref)
+	// for all other types, compare against the zero value
+	default:
+		zero := reflect.Zero(objValue.Type())
+		return reflect.DeepEqual(object, zero.Interface())
+	}
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	dm1, err := p.API.GetDirectChannel("{{.BasicUser.Id}}", "{{.BasicUser2.Id}}")
+	if err != nil {
+		return nil, err.Error()
+	}
+	if isEmpty(dm1) {
+		return nil, "dm1 is empty"
+	}
+
+	dm2, err := p.API.GetDirectChannel("{{.BasicUser.Id}}", "{{.BasicUser.Id}}")
+	if err != nil {
+		return nil, err.Error()
+	}
+	if isEmpty(dm2) {
+		return nil, "dm2 is empty"
+	}
+
+	dm3, err := p.API.GetDirectChannel("{{.BasicUser.Id}}", model.NewId())
+	if err == nil {
+		return nil, "Expected to get error while fetching incorrect channel"
+	}
+	if !isEmpty(dm3) {
+		return nil, "dm3 is NOT empty"
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_get_profile_image_plugin/main.go

@@ -0,0 +1,65 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"reflect"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func isEmpty(object interface{}) bool {
+
+	// get nil case out of the way
+	if object == nil {
+		return true
+	}
+
+	objValue := reflect.ValueOf(object)
+
+	switch objValue.Kind() {
+	// collection types are empty when they have no element
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		return objValue.Len() == 0
+	// pointers are empty if nil or if the value they point to is empty
+	case reflect.Ptr:
+		if objValue.IsNil() {
+			return true
+		}
+		deref := objValue.Elem().Interface()
+		return isEmpty(deref)
+	// for all other types, compare against the zero value
+	default:
+		zero := reflect.Zero(objValue.Type())
+		return reflect.DeepEqual(object, zero.Interface())
+	}
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+
+	// check existing user first
+	data, err := p.API.GetProfileImage("{{.BasicUser.Id}}")
+	if err != nil {
+		return nil, err.Error()
+	}
+	if isEmpty(data) {
+		return nil, "GetProfileImage return empty"
+	}
+
+	// then unknown user
+	data, err = p.API.GetProfileImage(model.NewId())
+	if err == nil || data != nil {
+		return nil, "GetProfileImage should've returned an error"
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_member_channels_plugin/main.go

@@ -0,0 +1,31 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	channelMembers, err := p.API.GetChannelMembersForUser("{{.BasicTeam.Id}}", "{{.BasicUser.Id}}", 0, 10)
+
+	if err != nil {
+		return nil, err.Error() + "failed to get channel members"
+	} else if len(channelMembers) != 3 {
+		return nil, "Invalid number of channel members"
+	} else if channelMembers[0].UserId != "{{.BasicUser.Id}}" {
+		return nil, "Invalid user id returned"
+	}
+
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_members_plugin/main.go

@@ -0,0 +1,29 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	teamMembers, err := p.API.GetTeamMembersForUser("{{.BasicUser.Id}}", 0, 10)
+	if err != nil {
+		return nil, err.Error() + "failed to get team members"
+	} else if len(teamMembers) != 1 {
+		return nil, "Invalid number of team members"
+	} else if teamMembers[0].UserId != "{{.BasicUser.Id}}" || teamMembers[0].TeamId != "{{.BasicTeam.Id}}" {
+		return nil, "Invalid user or team id returned"
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_search_channels_plugin/main.go

@@ -0,0 +1,38 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+
+	channels, err := p.API.SearchChannels("{{.BasicTeam.Id}}", "{{.BasicChannel.Name}}")
+	if err != nil {
+		return nil, err.Error()
+	}
+	if len(channels) != 1 {
+		return nil, "Returned invalid number of channels"
+	}
+
+	channels, err = p.API.SearchChannels("invalidid", "{{.BasicChannel.Name}}")
+	if err != nil {
+		return nil, err.Error()
+	}
+	if len(channels) != 0 {
+		return nil, "Returned invalid number of channels"
+	}
+
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_search_posts_in_team_plugin/main.go

@@ -0,0 +1,65 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+
+	testCases := []struct {
+		description      string
+		teamId           string
+		params           []*model.SearchParams
+		expectedPostsLen int
+	}{
+		{
+			"nil params",
+			"{{.BasicTeam.Id}}",
+			nil,
+			0,
+		},
+		{
+			"empty params",
+			"{{.BasicTeam.Id}}",
+			[]*model.SearchParams{},
+			0,
+		},
+		{
+			"doesn't match any posts",
+			"{{.BasicTeam.Id}}",
+			model.ParseSearchParams("bad message", 0),
+			0,
+		},
+		{
+			"matched posts",
+			"{{.BasicTeam.Id}}",
+			model.ParseSearchParams("{{.BasicPost.Message}}", 0),
+			1,
+		},
+	}
+
+	for _, testCase := range testCases {
+		posts, err := p.API.SearchPostsInTeam(testCase.teamId, testCase.params)
+		if err != nil {
+			return nil, fmt.Sprintf("%v: %v", testCase.description, err.Error())
+		}
+		if testCase.expectedPostsLen != len(posts) {
+			return nil, fmt.Sprintf("%v: invalid number of posts: %v != %v", testCase.description, testCase.expectedPostsLen, len(posts))
+		}
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_search_teams_plugin/main.go

@@ -0,0 +1,56 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+
+	teams, err := p.API.SearchTeams("{{.BasicTeam.Name}}")
+	if err != nil {
+		return nil, "search failed: " + err.Message
+	}
+	if len(teams) != 1 {
+		return nil, fmt.Sprintf("search failed, wrong number of teams: %v", len(teams))
+	}
+
+	teams, err = p.API.SearchTeams("{{.BasicTeam.DisplayName}}")
+	if err != nil {
+		return nil, "search failed: " + err.Message
+	}
+	if len(teams) != 1 {
+		return nil, fmt.Sprintf("search failed, wrong number of teams: %v", len(teams))
+	}
+
+	teams, err = p.API.SearchTeams("{{.BasicTeam.Name}}"[:3])
+
+	if err != nil {
+		return nil, "search failed: " + err.Message
+	}
+	if len(teams) != 1 {
+		return nil, fmt.Sprintf("search failed, wrong number of teams: %v", len(teams))
+	}
+
+	teams, err = p.API.SearchTeams("not found")
+	if err != nil {
+		return nil, "search failed: " + err.Message
+	}
+	if len(teams) != 0 {
+		return nil, fmt.Sprintf("search failed, wrong number of teams: %v", len(teams))
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_send_mail_plugin/main.go

@@ -0,0 +1,59 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+	"github.com/mattermost/mattermost-server/services/mailservice"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	to := "{{.BasicUser.Email}}"
+	subject := "testing plugin api sending email"
+	body := "this is a test."
+
+	if err := p.API.SendMail(to, subject, body); err != nil {
+		return nil, err.Error()
+	}
+
+	// Check if we received the email
+	var resultsMailbox mailservice.JSONMessageHeaderInbucket
+	if errMail := mailservice.RetryInbucket(5, func() error {
+		var err error
+		resultsMailbox, err = mailservice.GetMailBox(to)
+		return err
+	}); errMail != nil {
+		return nil, errMail.Error()
+	}
+	if len(resultsMailbox) == 0 {
+		return nil, fmt.Sprintf("No mailbox results. Should be %v", len(resultsMailbox))
+	}
+	if !strings.ContainsAny(resultsMailbox[len(resultsMailbox)-1].To[0], to) {
+		return nil, "Result doesn't contain recipient"
+	}
+
+	resultsEmail, err1 := mailservice.GetMessageFromMailbox(to, resultsMailbox[len(resultsMailbox)-1].ID)
+	if err1 != nil {
+		return nil, err1.Error()
+	}
+	if resultsEmail.Subject != subject {
+		return nil, fmt.Sprintf("subject differs: %v vs %s", resultsEmail.Subject, subject)
+	}
+	if resultsEmail.Body.Text != body {
+		return nil, fmt.Sprintf("body differs: %v vs %s", resultsEmail.Body.Text, body)
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_set_profile_image_plugin/main.go

@@ -0,0 +1,90 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"image"
+	"image/color"
+	"image/png"
+	"reflect"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func isEmpty(object interface{}) bool {
+
+	// get nil case out of the way
+	if object == nil {
+		return true
+	}
+
+	objValue := reflect.ValueOf(object)
+
+	switch objValue.Kind() {
+	// collection types are empty when they have no element
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		return objValue.Len() == 0
+	// pointers are empty if nil or if the value they point to is empty
+	case reflect.Ptr:
+		if objValue.IsNil() {
+			return true
+		}
+		deref := objValue.Elem().Interface()
+		return isEmpty(deref)
+	// for all other types, compare against the zero value
+	default:
+		zero := reflect.Zero(objValue.Type())
+		return reflect.DeepEqual(object, zero.Interface())
+	}
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+
+	// Create an 128 x 128 image
+	img := image.NewRGBA(image.Rect(0, 0, 128, 128))
+	// Draw a red dot at (2, 3)
+	img.Set(2, 3, color.RGBA{255, 0, 0, 255})
+	buf := new(bytes.Buffer)
+	if err := png.Encode(buf, img); err != nil {
+		return nil, err.Error()
+	}
+
+	dataBytes := buf.Bytes()
+
+	// Set the user profile image
+	if err := p.API.SetProfileImage("{{.BasicUser.Id}}", dataBytes); err != nil {
+		return nil, err.Error()
+	}
+
+	// Get the user profile image to check
+	imageProfile, err := p.API.GetProfileImage("{{.BasicUser.Id}}")
+	if err != nil {
+		return nil, err.Error()
+	}
+	if isEmpty(imageProfile) {
+		return nil, "profile image is empty"
+	}
+
+	colorful := color.NRGBA{255, 0, 0, 255}
+	byteReader := bytes.NewReader(imageProfile)
+	img2, _, err2 := image.Decode(byteReader)
+	if err2 != nil {
+		return nil, err.Error()
+	}
+	if img2.At(2, 3) != colorful {
+		return nil, fmt.Sprintf("color mismatch %v != %v", img2.At(2, 3), colorful)
+	}
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_update_user_active_plugin/main.go

@@ -0,0 +1,68 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	uid := "{{.BasicUser.Id}}"
+	if err := p.API.UpdateUserActive(uid, true); err != nil {
+		return nil, err.Error()
+	}
+
+	user, err := p.API.GetUser(uid)
+	if err != nil {
+		return nil, err.Error()
+	}
+
+	if int64(0) != user.DeleteAt {
+		return nil, "DeleteAt value is not 0"
+	}
+
+	if err = p.API.UpdateUserActive(uid, false); err != nil {
+		return nil, err.Error()
+	}
+
+	user, err = p.API.GetUser(uid)
+	if err != nil {
+		return nil, err.Error()
+	}
+	if user == nil {
+		return nil, "GetUser returned nil"
+	}
+
+	if int64(0) == user.DeleteAt {
+		return nil, "DeleteAt value is 0"
+	}
+
+	if err = p.API.UpdateUserActive(uid, true); err != nil {
+		return nil, err.Error()
+	}
+
+	if err = p.API.UpdateUserActive(uid, true); err != nil {
+		return nil, err.Error()
+	}
+
+	user, err = p.API.GetUser(uid)
+	if err != nil {
+		return nil, err.Error()
+	}
+
+	if int64(0) != user.DeleteAt {
+		return nil, "DeleteAt value is not 0"
+	}
+
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}

tests/plugin_tests/test_update_user_status_plugin/main.go

@@ -0,0 +1,49 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/plugin"
+)
+
+type MyPlugin struct {
+	plugin.MattermostPlugin
+}
+
+func (p *MyPlugin) MessageWillBePosted(c *plugin.Context, post *model.Post) (*model.Post, string) {
+	uid := "{{.BasicUser.Id}}"
+
+	statuses := []string{model.STATUS_ONLINE, model.STATUS_AWAY, model.STATUS_DND, model.STATUS_OFFLINE}
+
+	for _, s := range statuses {
+		status, err := p.API.UpdateUserStatus(uid, s)
+		if err != nil {
+			return nil, err.Error()
+		}
+		if status == nil {
+			return nil, "Status was expected, got nil"
+		}
+		if s != status.Status {
+			return nil, fmt.Sprintf("Invalid status returned: %v != %v", s, status.Status)
+		}
+
+	}
+
+	status, err := p.API.UpdateUserStatus(uid, "notrealstatus")
+	if err == nil {
+		return nil, "Expected to get an error while updating invalid user status"
+	}
+	if status != nil {
+		return nil, "Status was expected to be nil, got: " + status.Status
+	}
+
+	return nil, ""
+}
+
+func main() {
+	plugin.ClientMain(&MyPlugin{})
+}