github.com/meulengracht/snapd@v0.0.0-20210719210640-8bde69bcc84e/gadget/quantity/offset_test.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2019 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package quantity_test
    21  
    22  import (
    23  	"fmt"
    24  
    25  	. "gopkg.in/check.v1"
    26  	"gopkg.in/yaml.v2"
    27  
    28  	"github.com/snapcore/snapd/gadget/quantity"
    29  )
    30  
    31  type offsetTestSuite struct{}
    32  
    33  var _ = Suite(&offsetTestSuite{})
    34  
    35  func (s *offsetTestSuite) TestIECString(c *C) {
    36  	for _, tc := range []struct {
    37  		offset quantity.Offset
    38  		exp    string
    39  	}{
    40  		{512, "512 B"},
    41  		{1000, "1000 B"},
    42  		{1030, "1.01 KiB"},
    43  		{quantity.OffsetKiB + 512, "1.50 KiB"},
    44  		{123 * quantity.OffsetKiB, "123 KiB"},
    45  		{512 * quantity.OffsetKiB, "512 KiB"},
    46  		{578 * quantity.OffsetMiB, "578 MiB"},
    47  		{1024*quantity.OffsetMiB + 123*quantity.OffsetMiB, "1.12 GiB"},
    48  		{1024 * 1024 * quantity.OffsetMiB, "1 TiB"},
    49  		{2 * 1024 * 1024 * 1024 * 1024 * quantity.OffsetMiB, "2048 PiB"},
    50  	} {
    51  		c.Check(tc.offset.IECString(), Equals, tc.exp)
    52  	}
    53  }
    54  
    55  func (s *offsetTestSuite) TestUnmarshalYAMLSize(c *C) {
    56  	type foo struct {
    57  		Offset quantity.Offset `yaml:"offset"`
    58  	}
    59  
    60  	for i, tc := range []struct {
    61  		s   string
    62  		sz  quantity.Offset
    63  		err string
    64  	}{
    65  		{"1234", 1234, ""},
    66  		{"1234M", 1234 * quantity.OffsetMiB, ""},
    67  		{"1234G", 1234 * 1024 * quantity.OffsetMiB, ""},
    68  		{"0", 0, ""},
    69  		{"a0M", 0, `cannot parse offset "a0M": no numerical prefix.*`},
    70  		{"-123", 0, `cannot parse offset "-123": offset cannot be negative`},
    71  		{"123a", 0, `cannot parse offset "123a": invalid suffix "a"`},
    72  	} {
    73  		c.Logf("tc: %v", i)
    74  
    75  		var f foo
    76  		err := yaml.Unmarshal([]byte(fmt.Sprintf("offset: %s", tc.s)), &f)
    77  		if tc.err != "" {
    78  			c.Check(err, ErrorMatches, tc.err)
    79  		} else {
    80  			c.Check(err, IsNil)
    81  			c.Check(f.Offset, Equals, tc.sz)
    82  		}
    83  	}
    84  }
    85  
    86  func (s *offsetTestSuite) TestOffsetString(c *C) {
    87  	var pOffset *quantity.Offset
    88  	c.Check(pOffset.String(), Equals, "unspecified")
    89  
    90  	for _, tc := range []struct {
    91  		offset quantity.Offset
    92  		exp    string
    93  	}{
    94  		{512, "512"},
    95  		{1030, "1030"},
    96  		{quantity.OffsetKiB + 512, "1536"},
    97  		{578 * quantity.OffsetMiB, "606076928"},
    98  	} {
    99  		c.Check(tc.offset.String(), Equals, tc.exp)
   100  	}
   101  }