Additional stats for podman info

In support of podman machine and its counterpart desktop, we have added
new stats to podman info.

For storage, we have added GraphRootAllocated and GraphRootUsed in
bytes.

For CPUs, we have added user, system, and idle percents based on
/proc/stat.

Fixes: #13876

Signed-off-by: Brent Baude <bbaude@redhat.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/libpod/info_test.go b/libpod/info_test.go
new file mode 100644
index 000000000..909b573c0
--- /dev/null
+++ b/libpod/info_test.go
@@ -0,0 +1,59 @@
+package libpod
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/containers/podman/v4/libpod/define"
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_statToPercent(t *testing.T) {
+	type args struct {
+		in0 []string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    *define.CPUUsage
+		wantErr assert.ErrorAssertionFunc
+	}{
+		{
+			name: "GoodParse",
+			args: args{in0: []string{"cpu", " ", "33628064", "27537", "9696996", "1314806705", "588142", "4775073", "2789228", "0", "598711", "0"}},
+			want: &define.CPUUsage{
+				UserPercent:   2.48,
+				SystemPercent: 0.71,
+				IdlePercent:   96.81,
+			},
+			wantErr: assert.NoError,
+		},
+		{
+			name:    "BadUserValue",
+			args:    args{in0: []string{"cpu", " ", "k", "27537", "9696996", "1314806705", "588142", "4775073", "2789228", "0", "598711", "0"}},
+			want:    nil,
+			wantErr: assert.Error,
+		},
+		{
+			name:    "BadSystemValue",
+			args:    args{in0: []string{"cpu", " ", "33628064", "27537", "k", "1314806705", "588142", "4775073", "2789228", "0", "598711", "0"}},
+			want:    nil,
+			wantErr: assert.Error,
+		},
+		{
+			name:    "BadIdleValue",
+			args:    args{in0: []string{"cpu", " ", "33628064", "27537", "9696996", "k", "588142", "4775073", "2789228", "0", "598711", "0"}},
+			want:    nil,
+			wantErr: assert.Error,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := statToPercent(tt.args.in0)
+			if !tt.wantErr(t, err, fmt.Sprintf("statToPercent(%v)", tt.args.in0)) {
+				return
+			}
+			assert.Equalf(t, tt.want, got, "statToPercent(%v)", tt.args.in0)
+		})
+	}
+}