Irqstat input plugin (#2494)

closes #2469

plugins/inputs/interrupts/interrupts_test.go

@@ -0,0 +1,59 @@
+package interrupts
+
+import (
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestParseInterrupts(t *testing.T) {
+	interruptStr := `           CPU0       CPU1
+  0:        134          0   IO-APIC-edge      timer
+  1:          7          3   IO-APIC-edge      i8042
+NMI:          0          0   Non-maskable interrupts
+LOC: 2338608687 2334309625   Local timer interrupts
+MIS:          0
+NET_RX:     867028		225
+TASKLET:	205			0`
+
+	parsed := []IRQ{
+		IRQ{
+			ID: "0", Type: "IO-APIC-edge", Device: "timer",
+			Cpus: []int64{int64(134), int64(0)}, Total: int64(134),
+		},
+		IRQ{
+			ID: "1", Type: "IO-APIC-edge", Device: "i8042",
+			Cpus: []int64{int64(7), int64(3)}, Total: int64(10),
+		},
+		IRQ{
+			ID: "NMI", Type: "Non-maskable interrupts",
+			Cpus: []int64{int64(0), int64(0)}, Total: int64(0),
+		},
+		IRQ{
+			ID: "LOC", Type: "Local timer interrupts",
+			Cpus:  []int64{int64(2338608687), int64(2334309625)},
+			Total: int64(4672918312),
+		},
+		IRQ{
+			ID: "MIS", Cpus: []int64{int64(0)}, Total: int64(0),
+		},
+		IRQ{
+			ID: "NET_RX", Cpus: []int64{int64(867028), int64(225)},
+			Total: int64(867253),
+		},
+		IRQ{
+			ID: "TASKLET", Cpus: []int64{int64(205), int64(0)},
+			Total: int64(205),
+		},
+	}
+	got, err := parseInterrupts(interruptStr)
+	require.Equal(t, nil, err)
+	require.NotEqual(t, 0, len(got))
+	require.Equal(t, len(got), len(parsed))
+	for i := 0; i < len(parsed); i++ {
+		assert.Equal(t, parsed[i], got[i])
+		for k := 0; k < len(parsed[i].Cpus); k++ {
+			assert.Equal(t, parsed[i].Cpus[k], got[i].Cpus[k])
+		}
+	}
+}