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7fa8d5e064
This fix is part of the discussion in 28199 about using
`truncate` to replace `--no-trunc`.
As part of the fix, a new function `truncate` has been
added for Go templates so that it is possible to use
```
docker stack services --format "{{truncate .ID 5}}: {{.Mode}} {{.Replicas}}"
```
to show truncated ID.
A unit test has been added.
This fix is related to 28199.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
package templates
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import (
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"bytes"
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"testing"
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"github.com/docker/docker/pkg/testutil/assert"
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)
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func TestParseStringFunctions(t *testing.T) {
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tm, err := Parse(`{{join (split . ":") "/"}}`)
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assert.NilError(t, err)
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var b bytes.Buffer
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assert.NilError(t, tm.Execute(&b, "text:with:colon"))
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want := "text/with/colon"
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assert.Equal(t, b.String(), want)
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}
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func TestNewParse(t *testing.T) {
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tm, err := NewParse("foo", "this is a {{ . }}")
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assert.NilError(t, err)
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var b bytes.Buffer
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assert.NilError(t, tm.Execute(&b, "string"))
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want := "this is a string"
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assert.Equal(t, b.String(), want)
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}
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func TestParseTruncateFunction(t *testing.T) {
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source := "tupx5xzf6hvsrhnruz5cr8gwp"
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testCases := []struct {
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template string
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expected string
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}{
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{
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template: `{{truncate . 5}}`,
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expected: "tupx5",
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},
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{
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template: `{{truncate . 25}}`,
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expected: "tupx5xzf6hvsrhnruz5cr8gwp",
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},
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{
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template: `{{truncate . 30}}`,
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expected: "tupx5xzf6hvsrhnruz5cr8gwp",
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},
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}
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for _, testCase := range testCases {
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tm, err := Parse(testCase.template)
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assert.NilError(t, err)
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var b bytes.Buffer
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assert.NilError(t, tm.Execute(&b, source))
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assert.Equal(t, b.String(), testCase.expected)
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}
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}
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