pkg/host: make machine info tests linux-specific

TestScanCPUInfo does not build on !linux.
TestMachineInfoLinux builds, but does not do anything useful.

1 files changed, 145 insertions, 0 deletions

diff --git a/pkg/host/machine_info_linux_test.go b/pkg/host/machine_info_linux_test.go
new file mode 100644
index 000000000..a96ca232f
--- /dev/null
+++ b/pkg/host/machine_info_linux_test.go
@@ -0,0 +1,145 @@
+// Copyright 2020 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package host
+
+import (
+	"bufio"
+	"bytes"
+	"strings"
+	"testing"
+)
+
+func TestMachineInfoLinux(t *testing.T) {
+	result, err := CollectMachineInfo()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	scanner := bufio.NewScanner(bytes.NewReader(result))
+
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		if line == "[CPU Info]" {
+			checkCPUInfo(t, scanner)
+		}
+		if line == "[KVM]" {
+			checkKVMInfo(t, scanner)
+		}
+	}
+}
+
+func checkCPUInfo(t *testing.T, scanner *bufio.Scanner) {
+	keys := make(map[string]bool)
+	for scanner.Scan() {
+		line := scanner.Text()
+		// End of CPU Info section.
+		if strings.HasPrefix(line, "-----") {
+			break
+		}
+		splitted := strings.Split(line, ":")
+		if len(splitted) != 2 {
+			t.Fatalf("the format of line \"%s\" is not correct", line)
+		}
+		key := strings.TrimSpace(splitted[0])
+		keys[key] = true
+	}
+
+	importantKeys := [][]string{
+		{"vendor", "vendor_id", "CPU implementer"},
+		{"model", "CPU part", "cpu model"},
+		{"flags", "features", "Features", "ASEs implemented", "type"},
+	}
+	for _, possibleNames := range importantKeys {
+		exists := false
+		for _, name := range possibleNames {
+			if keys[name] {
+				exists = true
+				break
+			}
+		}
+		if !exists {
+			t.Fatalf("one of {%s} should exists in the output, but not found",
+				strings.Join(possibleNames, ", "))
+		}
+	}
+}
+
+func checkKVMInfo(t *testing.T, scanner *bufio.Scanner) {
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == "" {
+			continue
+		}
+		if strings.HasPrefix(line, "-----") {
+			break
+		}
+		splitted := strings.Split(line, ":")
+		if len(splitted) != 2 {
+			t.Fatalf("the format of line \"%s\" is not correct", line)
+		}
+		key := strings.TrimSpace(splitted[0])
+		if key == "" {
+			t.Fatalf("empty key")
+		}
+		if key[0] != '/' {
+			continue
+		}
+
+		if !strings.HasPrefix(key, "/sys/module/kvm") {
+			t.Fatalf("the directory does not match /sys/module/kvm*")
+		}
+	}
+}
+
+func TestScanCPUInfo(t *testing.T) {
+	input := `A:	a
+B:	b
+
+C:	c1
+D:	d
+C:	c1
+D:	d
+C:	c2
+D:	d
+`
+
+	output := []struct {
+		key, val string
+	}{
+		{"A", "a"},
+		{"B", "b"},
+		{"C", "c1, c1, c2"},
+		{"D", "d"},
+	}
+	scanner := bufio.NewScanner(strings.NewReader(input))
+	buffer := new(bytes.Buffer)
+	scanCPUInfo(buffer, scanner)
+	result := bufio.NewScanner(buffer)
+
+	idx := 0
+	for result.Scan() {
+		line := result.Text()
+		splitted := strings.Split(line, ":")
+		if len(splitted) != 2 {
+			t.Fatalf("the format of line \"%s\" is not correct", line)
+		}
+		key := strings.TrimSpace(splitted[0])
+		val := strings.TrimSpace(splitted[1])
+		if idx >= len(output) {
+			t.Fatalf("additional line \"%s: %s\"", key, val)
+		}
+		expected := output[idx]
+		if key != expected.key || val != expected.val {
+			t.Fatalf("expected \"%s: %s\", got \"%s: %s\"",
+				expected.key, expected.val, key, val)
+		}
+		idx++
+	}
+	if idx < len(output) {
+		expected := output[idx]
+		t.Fatalf("expected \"%s: %s\", got end of output",
+			expected.key, expected.val)
+	}
+}