Add CPU and RAM information to metrics

Bug: b/365537477
Test: manual, TH
Change-Id: Ia76caaff2324f29b1e806915cab77bbb26df4ecb
diff --git a/ui/metrics/hostinfo_linux_test.go b/ui/metrics/hostinfo_linux_test.go
new file mode 100644
index 0000000..c44e453
--- /dev/null
+++ b/ui/metrics/hostinfo_linux_test.go
@@ -0,0 +1,118 @@
+// Copyright 2024 Google Inc. All rights reserved.
+//
+// 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 metrics
+
+// This file contain code to extract host information on linux from
+// /proc/cpuinfo and /proc/meminfo relevant to machine performance
+
+import (
+	"reflect"
+	"testing"
+
+	"android/soong/finder/fs"
+)
+
+func TestNewCpuInfo(t *testing.T) {
+	fs := fs.NewMockFs(nil)
+
+	if err := fs.MkDirs("/proc"); err != nil {
+		t.Fatalf("failed to create /proc dir: %v", err)
+	}
+	cpuFileName := "/proc/cpuinfo"
+
+	if err := fs.WriteFile(cpuFileName, cpuData, 0644); err != nil {
+		t.Fatalf("failed to write file %s: %v", cpuFileName, err)
+	}
+
+	cpuInfo, err := NewCpuInfo(fs)
+	if err != nil {
+		t.Fatalf("got %v, want nil for error", err)
+	}
+
+	if !reflect.DeepEqual(cpuInfo, expectedCpuInfo) {
+		t.Errorf("got %v, expecting %v for CpuInfo", cpuInfo, expectedCpuInfo)
+	}
+
+}
+
+func TestNewMemInfo(t *testing.T) {
+	fs := fs.NewMockFs(nil)
+
+	if err := fs.MkDirs("/proc"); err != nil {
+		t.Fatalf("failed to create /proc dir: %v", err)
+	}
+	memFileName := "/proc/meminfo"
+
+	if err := fs.WriteFile(memFileName, memData, 0644); err != nil {
+		t.Fatalf("failed to write file %s: %v", memFileName, err)
+	}
+
+	memInfo, err := NewMemInfo(fs)
+	if err != nil {
+		t.Fatalf("got %v, want nil for error", err)
+	}
+
+	if !reflect.DeepEqual(memInfo, expectedMemInfo) {
+		t.Errorf("got %v, expecting %v for MemInfo", memInfo, expectedMemInfo)
+	}
+
+}
+
+var cpuData = []byte(`processor	: 0
+vendor_id	: %%VENDOR%%
+cpu family	: 123
+model		: 456
+model name	: %%CPU MODEL NAME%%
+stepping	: 0
+cpu MHz		: 5555.555
+cache size	: 512 KB
+physical id	: 0
+siblings	: 128
+core id		: 0
+cpu cores	: 64
+apicid		: 0
+initial apicid	: 0
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 789
+wp		: yes
+flags		: %%cpu flags go here%%
+bugs		: %%bugs go here%%
+
+processor	: 1
+vendor_id	: %%BADVENDOR%%
+cpu family	: 234
+model		: 567
+model name	: %%BAD MODEL NAME%%
+flags		: %%BAD cpu flags go here%%
+`)
+
+var expectedCpuInfo = &CpuInfo{
+	VendorId:  "%%VENDOR%%",
+	ModelName: "%%CPU MODEL NAME%%",
+	CpuCores:  64,
+	Flags:     "%%cpu flags go here%%",
+}
+
+var memData = []byte(`MemTotal:       1000 mB
+MemFree:        10240000
+MemAvailable:   3000 kB
+Buffers:         7177844 kB
+`)
+
+var expectedMemInfo = &MemInfo{
+	MemTotal:     1048576000,
+	MemFree:      10240000,
+	MemAvailable: 3072000,
+}