fix(logs): show all matched logs when --since filter specified

internal/cli/logs/logs_test.go

@@ -7,6 +7,42 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+func TestOptionsTailLines(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name string
+		args []string
+		want int
+	}{
+		{"default", nil, 100},
+		{"follow", []string{"-f"}, 100},
+		{"since", []string{"--since", "1h"}, -1},
+		{"since and follow", []string{"--since", "1h", "-f"}, -1},
+		{"until only", []string{"--until", "1h"}, 100},
+		{"time range", []string{"--since", "3h", "--until", "1h"}, -1},
+		{"explicit default with since", []string{"--since", "1h", "--tail", "100"}, 100},
+		{"explicit limit with since", []string{"--since", "1h", "-n", "20"}, 20},
+		{"explicit limit before since", []string{"-n", "20", "--since", "1h"}, 20},
+		{"explicit all", []string{"--tail", "all"}, -1},
+		{"explicit zero with since", []string{"--since", "1h", "-n", "0", "-f"}, 0},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var options Options
+			require.NoError(t, Flags(&options).Parse(tt.args))
+			tail, err := options.TailLines()
+			require.NoError(t, err)
+			assert.Equal(t, tt.want, tail)
+		})
+	}
+
+	var options Options
+	require.NoError(t, Flags(&options).Parse([]string{"--since", "1h", "--tail", "invalid"}))
+	_, err := options.TailLines()
+	require.ErrorContains(t, err, "invalid --tail value")
+}
+
 func TestParseServiceArgs(t *testing.T) {
 	t.Parallel()