feat: add system package

system/os_test.go

@@ -0,0 +1,37 @@
+package system
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/internal"
+)
+
+func TestOsEnvOperation(t *testing.T) {
+	assert := internal.NewAssert(t, "TestOsEnvOperation")
+
+	envNotExist := GetOsEnv("foo")
+	assert.Equal("", envNotExist)
+
+	SetOsEnv("foo", "foo_value")
+	envExist := GetOsEnv("foo")
+	assert.Equal("foo_value", envExist)
+
+	assert.Equal(true, CompareOsEnv("foo", "foo_value"))
+	assert.Equal(false, CompareOsEnv("foo", "abc"))
+}
+
+func TestExecCommand(t *testing.T) {
+	assert := internal.NewAssert(t, "TestExecCommand")
+
+	err, out, errout := ExecCommand("ls")
+	assert.IsNil(err)
+
+	err, out, errout = ExecCommand("abc")
+	t.Log("std out: ", out)
+	t.Log("std err: ", errout)
+	if err != nil {
+		t.Logf("error: %v\n", err)
+	}
+
+	assert.IsNotNil(err)
+}