docker-cli/cli/command/formatter/disk_usage_test.go

package formatter

import (
	"bytes"
	"testing"

	"gotest.tools/v3/assert"
	"gotest.tools/v3/golden"
)

func TestDiskUsageContextFormatWrite(t *testing.T) {
	cases := []struct {
		context  DiskUsageContext
		expected string
	}{
		// Check default output format (verbose and non-verbose mode) for table headers
		{
			DiskUsageContext{
				Context: Context{
					Format: NewDiskUsageFormat("table", false),
				},
				Verbose: false},
			`TYPE            TOTAL     ACTIVE    SIZE      RECLAIMABLE
Images          0         0         0B        0B
Containers      0         0         0B        0B
Local Volumes   0         0         0B        0B
Build Cache     0         0         0B        0B
`,
		},
		{
			DiskUsageContext{Verbose: true, Context: Context{Format: NewDiskUsageFormat("table", true)}},
			`Images space usage:

REPOSITORY   TAG       IMAGE ID   CREATED   SIZE      SHARED SIZE   UNIQUE SIZE   CONTAINERS

Containers space usage:

CONTAINER ID   IMAGE     COMMAND   LOCAL VOLUMES   SIZE      CREATED   STATUS    NAMES

Local Volumes space usage:

VOLUME NAME   LINKS     SIZE

Build cache usage: 0B

CACHE ID   CACHE TYPE   SIZE      CREATED   LAST USED   USAGE     SHARED
`,
		},
		{
			DiskUsageContext{Verbose: true, Context: Context{Format: NewDiskUsageFormat("raw", true)}},
			``,
		},
		{
			DiskUsageContext{Verbose: true, Context: Context{Format: NewDiskUsageFormat("{{json .}}", true)}},
			`{"Images":[],"Containers":[],"Volumes":[],"BuildCache":[]}`,
		},
		// Errors
		{
			DiskUsageContext{
				Context: Context{
					Format: "{{InvalidFunction}}",
				},
			},
			`Template parsing error: template: :1: function "InvalidFunction" not defined
`,
		},
		{
			DiskUsageContext{
				Context: Context{
					Format: "{{nil}}",
				},
			},
			`Template parsing error: template: :1:2: executing "" at <nil>: nil is not a command
`,
		},
		// Table Format
		{
			DiskUsageContext{
				Context: Context{
					Format: NewDiskUsageFormat("table", false),
				},
			},
			`TYPE            TOTAL     ACTIVE    SIZE      RECLAIMABLE
Images          0         0         0B        0B
Containers      0         0         0B        0B
Local Volumes   0         0         0B        0B
Build Cache     0         0         0B        0B
`,
		},
		{
			DiskUsageContext{
				Context: Context{
					Format: NewDiskUsageFormat("table {{.Type}}\t{{.Active}}", false),
				},
			},
			string(golden.Get(t, "disk-usage-context-write-custom.golden")),
		},
		// Raw Format
		{
			DiskUsageContext{
				Context: Context{
					Format: NewDiskUsageFormat("raw", false),
				},
			},
			string(golden.Get(t, "disk-usage-raw-format.golden")),
		},
	}

	for _, tc := range cases {
		tc := tc
		t.Run(string(tc.context.Format), func(t *testing.T) {
			var out bytes.Buffer
			tc.context.Output = &out
			if err := tc.context.Write(); err != nil {
				assert.Error(t, err, tc.expected)
			} else {
				assert.Equal(t, out.String(), tc.expected)
			}
		})
	}
}