feat: initial release with 48 Mattermost MCP tools

- 27 base tools: channels, messaging, users, reactions, files, DMs
- Team management: invite/remove users, get stats, list members
- Slash commands: execute /remind, /poll, etc.
- Webhook management: incoming and outgoing webhooks
- System tools: server config, logs, bulk status updates
- Channel admin: create, invite, leave, delete channels
- Read-only mode for safe exploration
- Dual token support (bot + PAT) for enhanced security
- Apache 2.0 licensed

operation/user/user_test.go

@@ -0,0 +1,80 @@
+package user
+
+import (
+	"testing"
+
+	"github.com/karti-ai/mattermost-mcp-server/pkg/mattermost"
+	"github.com/mark3labs/mcp-go/mcp"
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSlimUser(t *testing.T) {
+	u := &model.User{
+		Id:        "user123",
+		Username:  "johndoe",
+		Email:     "john@example.com",
+		FirstName: "John",
+		LastName:  "Doe",
+		Roles:     "system_user",
+	}
+
+	slim := SlimUser(u)
+	assert.NotNil(t, slim)
+	assert.Equal(t, "user123", slim["id"])
+	assert.Equal(t, "johndoe", slim["username"])
+	assert.Equal(t, "john@example.com", slim["email"])
+	assert.Equal(t, "John", slim["first_name"])
+	assert.Equal(t, "Doe", slim["last_name"])
+	assert.Equal(t, "system_user", slim["roles"])
+}
+
+func TestSlimUser_Nil(t *testing.T) {
+	slim := SlimUser(nil)
+	assert.Nil(t, slim)
+}
+
+func TestToolRegistration(t *testing.T) {
+	tools := Tool.Tools()
+	assert.Len(t, tools, 2)
+
+	toolNames := make(map[string]bool)
+	for _, t := range tools {
+		toolNames[t.Tool.Name] = true
+	}
+
+	assert.True(t, toolNames[SearchUsersToolName], "SearchUsers tool should be registered")
+	assert.True(t, toolNames[GetUserStatusToolName], "GetUserStatus tool should be registered")
+}
+
+func TestSearchUsersFn_ClientNotInitialized(t *testing.T) {
+	mattermost.SetGlobalClient(nil)
+
+	req := mcp.CallToolRequest{
+		Params: mcp.CallToolParams{
+			Name: SearchUsersToolName,
+			Arguments: map[string]interface{}{
+				"term": "john",
+			},
+		},
+	}
+
+	result, err := SearchUsersFn(nil, req)
+	assert.NoError(t, err)
+	assert.NotNil(t, result)
+	assert.True(t, result.IsError)
+}
+
+func TestSearchUsersFn_MissingTerm(t *testing.T) {
+	req := mcp.CallToolRequest{
+		Params: mcp.CallToolParams{
+			Name:      SearchUsersToolName,
+			Arguments: map[string]interface{}{},
+		},
+	}
+
+	result, err := SearchUsersFn(nil, req)
+	assert.NoError(t, err)
+	assert.NotNil(t, result)
+	assert.True(t, result.IsError)
+}