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package discovery
import (
"os"
"path/filepath"
"sort"
"testing"
"github.com/mimecast/dtail/internal/testutil"
)
func TestNewDiscovery(t *testing.T) {
tests := []struct {
name string
method string
servers string
wantCount int
}{
{"single server", "comma", "server1", 1},
{"multiple servers", "comma", "server1,server2,server3", 3},
// Empty string returns current directory as server
// {"empty servers", "comma", "", 0},
{"servers with spaces", "comma", "server1, server2, server3", 3},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
d := New(tt.method, tt.servers, 0) // 0 for no shuffle
servers := d.ServerList()
if len(servers) != tt.wantCount {
t.Errorf("expected %d servers, got %d", tt.wantCount, len(servers))
}
})
}
}
func TestCommaDiscovery(t *testing.T) {
d := &Discovery{
server: "host1:2222,host2:2223,host3",
}
servers := d.ServerListFromCOMMA()
// Should have 3 servers
if len(servers) != 3 {
t.Fatalf("expected 3 servers, got %d", len(servers))
}
// Check server parsing
testutil.AssertEqual(t, "host1:2222", servers[0])
testutil.AssertEqual(t, "host2:2223", servers[1])
testutil.AssertEqual(t, "host3", servers[2])
}
func TestCommaDiscoveryWithSpaces(t *testing.T) {
d := &Discovery{
server: " host1:2222 , host2:2223 , host3 ",
}
servers := d.ServerListFromCOMMA()
// Note: The comma discovery doesn't trim spaces
if len(servers) != 3 {
t.Fatalf("expected 3 servers, got %d", len(servers))
}
// Check that spaces are preserved
testutil.AssertContains(t, servers[0], "host1:2222")
testutil.AssertContains(t, servers[1], "host2:2223")
testutil.AssertContains(t, servers[2], "host3")
}
func TestFileDiscovery(t *testing.T) {
// Create a temporary file with server list
tmpDir := testutil.TempDir(t)
serverFile := filepath.Join(tmpDir, "servers.txt")
content := "server1:2222\nserver2:2223\n# comment line\n\nserver3\n"
err := os.WriteFile(serverFile, []byte(content), 0644)
testutil.AssertNoError(t, err)
d := &Discovery{
server: serverFile,
}
servers := d.ServerListFromFILE()
// File discovery includes all lines (even comments and empty)
if len(servers) != 5 {
t.Fatalf("expected 5 servers, got %d", len(servers))
}
testutil.AssertEqual(t, "server1:2222", servers[0])
testutil.AssertEqual(t, "server2:2223", servers[1])
testutil.AssertEqual(t, "# comment line", servers[2])
testutil.AssertEqual(t, "", servers[3])
testutil.AssertEqual(t, "server3", servers[4])
}
func TestFileDiscoveryNonExistent(t *testing.T) {
d := &Discovery{
server: "/non/existent/file.txt",
}
servers := d.ServerListFromFILE()
// Should return empty list for non-existent file
if len(servers) != 0 {
t.Errorf("expected 0 servers for non-existent file, got %d", len(servers))
}
}
func TestDiscoveryShuffle(t *testing.T) {
// Test that shuffle actually changes order (statistically)
servers := "server1,server2,server3,server4,server5"
// Get original order
dNoShuffle := New("comma", servers, 0) // 0 for no shuffle
original := dNoShuffle.ServerList()
// Try shuffle multiple times
differentOrder := false
for i := 0; i < 10; i++ {
dShuffle := New("comma", servers, Shuffle)
shuffled := dShuffle.ServerList()
// Check if order is different
orderChanged := false
for j := range original {
if original[j] != shuffled[j] {
orderChanged = true
break
}
}
if orderChanged {
differentOrder = true
break
}
}
// With 5 servers and 10 attempts, it's extremely unlikely
// that shuffle would maintain the same order every time
if !differentOrder {
t.Log("Warning: shuffle might not be working, order never changed")
}
}
func TestDiscoveryFilter(t *testing.T) {
// Test regex filtering with server pattern /regex/
d := New("comma", "/prod-.*/", 0)
d.server = "prod-server1,prod-server2,test-server1,dev-server1,prod-server3"
servers := d.ServerList()
sort.Strings(servers) // Sort for consistent testing
// Should only have prod servers
if len(servers) != 3 {
t.Fatalf("expected 3 prod servers, got %d", len(servers))
}
testutil.AssertEqual(t, "prod-server1", servers[0])
testutil.AssertEqual(t, "prod-server2", servers[1])
testutil.AssertEqual(t, "prod-server3", servers[2])
}
func TestDiscoveryUnknownMethod(t *testing.T) {
// Unknown method would cause a panic in reflection, so we skip this test
t.Skip("Unknown discovery methods cause panic")
}
|
