1 files changed, 90 insertions, 0 deletions
diff --git a/runsc/boot/compat_test.go b/runsc/boot/compat_test.go
new file mode 100644
index 000000000..839c5303b
--- /dev/null
+++ b/runsc/boot/compat_test.go
@@ -0,0 +1,90 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package boot
+
+import (
+	"testing"
+)
+
+func TestOnceTracker(t *testing.T) {
+	o := onceTracker{}
+	if !o.shouldReport(nil) {
+		t.Error("first call to checkAndMark, got: false, want: true")
+	}
+	o.onReported(nil)
+	for i := 0; i < 2; i++ {
+		if o.shouldReport(nil) {
+			t.Error("after first call to checkAndMark, got: true, want: false")
+		}
+	}
+}
+
+func TestArgsTracker(t *testing.T) {
+	for _, tc := range []struct {
+		name   string
+		idx    []int
+		arg1_1 uint64
+		arg1_2 uint64
+		arg2_1 uint64
+		arg2_2 uint64
+		want   bool
+	}{
+		{name: "same arg1", idx: []int{0}, arg1_1: 123, arg1_2: 123, want: false},
+		{name: "same arg2", idx: []int{1}, arg2_1: 123, arg2_2: 123, want: false},
+		{name: "diff arg1", idx: []int{0}, arg1_1: 123, arg1_2: 321, want: true},
+		{name: "diff arg2", idx: []int{1}, arg2_1: 123, arg2_2: 321, want: true},
+		{name: "cmd is uint32", idx: []int{0}, arg2_1: 0xdead00000123, arg2_2: 0xbeef00000123, want: false},
+		{name: "same 2 args", idx: []int{0, 1}, arg2_1: 123, arg1_1: 321, arg2_2: 123, arg1_2: 321, want: false},
+		{name: "diff 2 args", idx: []int{0, 1}, arg2_1: 123, arg1_1: 321, arg2_2: 789, arg1_2: 987, want: true},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			c := newArgsTracker(tc.idx...)
+			regs := newRegs()
+			setArgVal(0, tc.arg1_1, regs)
+			setArgVal(1, tc.arg2_1, regs)
+			if !c.shouldReport(regs) {
+				t.Error("first call to shouldReport, got: false, want: true")
+			}
+			c.onReported(regs)
+
+			setArgVal(0, tc.arg1_2, regs)
+			setArgVal(1, tc.arg2_2, regs)
+			if got := c.shouldReport(regs); tc.want != got {
+				t.Errorf("second call to shouldReport, got: %t, want: %t", got, tc.want)
+			}
+		})
+	}
+}
+
+func TestArgsTrackerLimit(t *testing.T) {
+	c := newArgsTracker(0, 1)
+	for i := 0; i < reportLimit; i++ {
+		regs := newRegs()
+		setArgVal(0, 123, regs)
+		setArgVal(1, uint64(i), regs)
+		if !c.shouldReport(regs) {
+			t.Error("shouldReport before limit was reached, got: false, want: true")
+		}
+		c.onReported(regs)
+	}
+
+	// Should hit the count limit now.
+	regs := newRegs()
+	setArgVal(0, 123, regs)
+	setArgVal(1, 123456, regs)
+	if c.shouldReport(regs) {
+		t.Error("shouldReport after limit was reached, got: true, want: false")
+	}
+}