feat!: add summary to coder ping (#14762)

cli/ping_internal_test.go

@@ -0,0 +1,106 @@
+package cli
+
+import (
+	"io"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+	"tailscale.com/ipn/ipnstate"
+)
+
+func TestBuildSummary(t *testing.T) {
+	t.Parallel()
+
+	t.Run("Ok", func(t *testing.T) {
+		t.Parallel()
+		input := []*ipnstate.PingResult{
+			{
+				Err:            "",
+				LatencySeconds: 0.1,
+			},
+			{
+				Err:            "",
+				LatencySeconds: 0.2,
+			},
+			{
+				Err:            "",
+				LatencySeconds: 0.3,
+			},
+			{
+				Err:            "ping error",
+				LatencySeconds: 0.4,
+			},
+		}
+
+		actual := pingSummary{
+			Workspace: "test",
+		}
+		for _, r := range input {
+			actual.addResult(r)
+		}
+		actual.Write(io.Discard)
+		require.Equal(t, time.Duration(0.1*float64(time.Second)), *actual.Min)
+		require.Equal(t, time.Duration(0.2*float64(time.Second)), *actual.Avg)
+		require.Equal(t, time.Duration(0.3*float64(time.Second)), *actual.Max)
+		require.Equal(t, time.Duration(0.009999999*float64(time.Second)), *actual.Variance)
+		require.Equal(t, actual.Successful, 3)
+	})
+
+	t.Run("One", func(t *testing.T) {
+		t.Parallel()
+		input := []*ipnstate.PingResult{
+			{
+				LatencySeconds: 0.2,
+			},
+		}
+
+		actual := &pingSummary{
+			Workspace: "test",
+		}
+		for _, r := range input {
+			actual.addResult(r)
+		}
+		actual.Write(io.Discard)
+		require.Equal(t, actual.Successful, 1)
+		require.Equal(t, time.Duration(0.2*float64(time.Second)), *actual.Min)
+		require.Equal(t, time.Duration(0.2*float64(time.Second)), *actual.Avg)
+		require.Equal(t, time.Duration(0.2*float64(time.Second)), *actual.Max)
+		require.Nil(t, actual.Variance)
+	})
+
+	t.Run("NoLatency", func(t *testing.T) {
+		t.Parallel()
+		input := []*ipnstate.PingResult{
+			{
+				Err: "ping error",
+			},
+			{
+				Err:            "ping error",
+				LatencySeconds: 0.2,
+			},
+		}
+
+		expected := &pingSummary{
+			Workspace:  "test",
+			Total:      2,
+			Successful: 0,
+			Min:        nil,
+			Avg:        nil,
+			Max:        nil,
+			Variance:   nil,
+			latencySum: 0,
+			runningAvg: 0,
+			m2:         0,
+		}
+
+		actual := &pingSummary{
+			Workspace: "test",
+		}
+		for _, r := range input {
+			actual.addResult(r)
+		}
+		actual.Write(io.Discard)
+		require.Equal(t, expected, actual)
+	})
+}