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lang/funcs: add acc tests for functions (#21112) 

* lang/funcs: testing of functions through the lang package API
The function-specific unit tests do not cover the HCL conversion that happens when the functions are called in a terraform configuration. For e.g., HCL converts sets to lists before passing it to the function. This means that we could not test passing a set in the function _unit_ tests.
This adds a higher-level acceptance test, plus a check that every (pure) function has a test.

* website/docs: update function documentation
This commit is contained in:
Kristin Laemmert 2019-04-29 13:11:28 -04:00 committed by GitHub
parent eed605ac05
commit 394cf7f25e
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9 changed files with 905 additions and 12 deletions
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12
.tfdev Normal file
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@ -0,0 +1,12 @@
version_info {
commit_var = "main.GitCommit"
version_var = "github.com/hashicorp/terraform/version.Version"
prerelease_var = "github.com/hashicorp/terraform/version.Prerelease"
}
version_exec = false
platform {
os = "darwin"
arch = "amd64"
}

6
lang/funcs/collection.go
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@ -257,8 +257,10 @@ var CompactFunc = function.New(&function.Spec{
}, },
}) })
// ContainsFunc contructs a function that determines whether a given list contains // ContainsFunc contructs a function that determines whether a given list
// a given single value as one of its elements. // contains a given single value as one of its elements.
//
// ContainsFunc also works on sets, as HCL automatically converts sets to lists.
var ContainsFunc = function.New(&function.Spec{ var ContainsFunc = function.New(&function.Spec{
Params: []function.Parameter{ Params: []function.Parameter{
{ {

846
lang/functions_test.go Normal file
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@ -0,0 +1,846 @@
package lang
import (
"fmt"
"path/filepath"
"testing"
"github.com/hashicorp/hcl2/hcl"
"github.com/hashicorp/hcl2/hcl/hclsyntax"
homedir "github.com/mitchellh/go-homedir"
"github.com/zclconf/go-cty/cty"
)
// TestFunctions tests that functions are callable through the functionality
// in the langs package, via HCL.
//
// These tests are primarily here to assert that the functions are properly
// registered in the functions table, rather than to test all of the details
// of the functions. Each function should only have one or two tests here,
// since the main set of unit tests for a function should live alongside that
// function either in the "funcs" subdirectory here or over in the cty
// function/stdlib package.
//
// One exception to that is we can use this test mechanism to assert common
// patterns that are used in real-world configurations which rely on behaviors
// implemented either in this lang package or in HCL itself, such as automatic
// type conversions. The function unit tests don't cover those things because
// they call directly into the functions.
//
// With that said then, this test function should contain at least one simple
// test case per function registered in the functions table (just to prove
// it really is registered correctly) and possibly a small set of additional
// functions showing real-world use-cases that rely on type conversion
// behaviors.
func TestFunctions(t *testing.T) {
// used in `pathexpand()` test
homePath, err := homedir.Dir()
if err != nil {
t.Fatalf("Error getting home directory: %v", err)
}
tests := map[string][]struct {
src string
want cty.Value
}{
// Please maintain this list in alphabetical order by function, with
// a blank line between the group of tests for each function.
"abs": {
{
`abs(-1)`,
cty.NumberIntVal(1),
},
},
"base64decode": {
{
`base64decode("YWJjMTIzIT8kKiYoKSctPUB+")`,
cty.StringVal("abc123!?$*&()'-=@~"),
},
},
"base64encode": {
{
`base64encode("abc123!?$*&()'-=@~")`,
cty.StringVal("YWJjMTIzIT8kKiYoKSctPUB+"),
},
},
"base64gzip": {
{
`base64gzip("test")`,
cty.StringVal("H4sIAAAAAAAA/ypJLS4BAAAA//8BAAD//wx+f9gEAAAA"),
},
},
"base64sha256": {
{
`base64sha256("test")`,
cty.StringVal("n4bQgYhMfWWaL+qgxVrQFaO/TxsrC4Is0V1sFbDwCgg="),
},
},
"base64sha512": {
{
`base64sha512("test")`,
cty.StringVal("7iaw3Ur350mqGo7jwQrpkj9hiYB3Lkc/iBml1JQODbJ6wYX4oOHV+E+IvIh/1nsUNzLDBMxfqa2Ob1f1ACio/w=="),
},
},
"basename": {
{
`basename("testdata/hello.txt")`,
cty.StringVal("hello.txt"),
},
},
"ceil": {
{
`ceil(1.2)`,
cty.NumberIntVal(2),
},
},
"chomp": {
{
`chomp("goodbye\ncruel\nworld\n")`,
cty.StringVal("goodbye\ncruel\nworld"),
},
},
"chunklist": {
{
`chunklist(["a", "b", "c"], 1)`,
cty.ListVal([]cty.Value{
cty.ListVal([]cty.Value{
cty.StringVal("a"),
}),
cty.ListVal([]cty.Value{
cty.StringVal("b"),
}),
cty.ListVal([]cty.Value{
cty.StringVal("c"),
}),
}),
},
},
"cidrhost": {
{
`cidrhost("192.168.1.0/24", 5)`,
cty.StringVal("192.168.1.5"),
},
},
"cidrnetmask": {
{
`cidrnetmask("192.168.1.0/24")`,
cty.StringVal("255.255.255.0"),
},
},
"cidrsubnet": {
{
`cidrsubnet("192.168.2.0/20", 4, 6)`,
cty.StringVal("192.168.6.0/24"),
},
},
"coalesce": {
{
`coalesce("first", "second", "third")`,
cty.StringVal("first"),
},
{
`coalescelist(["first", "second"], ["third", "fourth"])`,
cty.ListVal([]cty.Value{
cty.StringVal("first"), cty.StringVal("second"),
}),
},
},
"coalescelist": {
{
`coalescelist(["a", "b"], ["c", "d"])`,
cty.ListVal([]cty.Value{
cty.StringVal("a"),
cty.StringVal("b"),
}),
},
},
"compact": {
{
`compact(["test", "", "test"])`,
cty.ListVal([]cty.Value{
cty.StringVal("test"), cty.StringVal("test"),
}),
},
},
"concat": {
{
`concat(["a", ""], ["b", "c"])`,
cty.TupleVal([]cty.Value{
cty.StringVal("a"),
cty.StringVal(""),
cty.StringVal("b"),
cty.StringVal("c"),
}),
},
},
"contains": {
{
`contains(["a", "b"], "a")`,
cty.True,
},
{ // Should also work with sets, due to automatic conversion
`contains(toset(["a", "b"]), "a")`,
cty.True,
},
},
"csvdecode": {
{
`csvdecode("a,b,c\n1,2,3\n4,5,6")`,
cty.ListVal([]cty.Value{
cty.ObjectVal(map[string]cty.Value{
"a": cty.StringVal("1"),
"b": cty.StringVal("2"),
"c": cty.StringVal("3"),
}),
cty.ObjectVal(map[string]cty.Value{
"a": cty.StringVal("4"),
"b": cty.StringVal("5"),
"c": cty.StringVal("6"),
}),
}),
},
},
"dirname": {
{
`dirname("testdata/hello.txt")`,
cty.StringVal("testdata"),
},
},
"distinct": {
{
`distinct(["a", "b", "a", "b"])`,
cty.ListVal([]cty.Value{
cty.StringVal("a"), cty.StringVal("b"),
}),
},
},
"element": {
{
`element(["hello"], 0)`,
cty.StringVal("hello"),
},
},
"file": {
{
`file("hello.txt")`,
cty.StringVal("hello!"),
},
},
"fileexists": {
{
`fileexists("hello.txt")`,
cty.BoolVal(true),
},
},
"filebase64": {
{
`filebase64("hello.txt")`,
cty.StringVal("aGVsbG8h"),
},
},
"filebase64sha256": {
{
`filebase64sha256("hello.txt")`,
cty.StringVal("zgYJL7lI2f+sfRo3bkBLJrdXW8wR7gWkYV/vT+w6MIs="),
},
},
"filebase64sha512": {
{
`filebase64sha512("hello.txt")`,
cty.StringVal("xvgdsOn4IGyXHJ5YJuO6gj/7saOpAPgEdlKov3jqmP38dFhVo4U6Y1Z1RY620arxIJ6I6tLRkjgrXEy91oUOAg=="),
},
},
"filemd5": {
{
`filemd5("hello.txt")`,
cty.StringVal("5a8dd3ad0756a93ded72b823b19dd877"),
},
},
"filesha1": {
{
`filesha1("hello.txt")`,
cty.StringVal("8f7d88e901a5ad3a05d8cc0de93313fd76028f8c"),
},
},
"filesha256": {
{
`filesha256("hello.txt")`,
cty.StringVal("ce06092fb948d9ffac7d1a376e404b26b7575bcc11ee05a4615fef4fec3a308b"),
},
},
"filesha512": {
{
`filesha512("hello.txt")`,
cty.StringVal("c6f81db0e9f8206c971c9e5826e3ba823ffbb1a3a900f8047652a8bf78ea98fdfc745855a3853a635675458eb6d1aaf1209e88ead2d192382b5c4cbdd6850e02"),
},
},
"flatten": {
{
`flatten([tolist(["a", "b"]), tolist(["c", "d"])])`,
cty.ListVal([]cty.Value{
cty.StringVal("a"),
cty.StringVal("b"),
cty.StringVal("c"),
cty.StringVal("d"),
}),
},
},
"floor": {
{
`floor(-1.8)`,
cty.NumberFloatVal(-2),
},
},
"format": {
{
`format("Hello, %s!", "Ander")`,
cty.StringVal("Hello, Ander!"),
},
},
"formatlist": {
{
`formatlist("Hello, %s!", ["Valentina", "Ander", "Olivia", "Sam"])`,
cty.ListVal([]cty.Value{
cty.StringVal("Hello, Valentina!"),
cty.StringVal("Hello, Ander!"),
cty.StringVal("Hello, Olivia!"),
cty.StringVal("Hello, Sam!"),
}),
},
},
"formatdate": {
{
`formatdate("DD MMM YYYY hh:mm ZZZ", "2018-01-04T23:12:01Z")`,
cty.StringVal("04 Jan 2018 23:12 UTC"),
},
},
"indent": {
{
fmt.Sprintf("indent(4, %#v)", Poem),
cty.StringVal("Fleas:\n Adam\n Had'em\n \n E.E. Cummings"),
},
},
"index": {
{
`index(["a", "b", "c"], "a")`,
cty.NumberIntVal(0),
},
},
"join": {
{
`join(" ", ["Hello", "World"])`,
cty.StringVal("Hello World"),
},
},
"jsondecode": {
{
`jsondecode("{\"hello\": \"world\"}")`,
cty.ObjectVal(map[string]cty.Value{
"hello": cty.StringVal("world"),
}),
},
},
"jsonencode": {
{
`jsonencode({"hello"="world"})`,
cty.StringVal("{\"hello\":\"world\"}"),
},
},
"keys": {
{
`keys({"hello"=1, "goodbye"=42})`,
cty.TupleVal([]cty.Value{
cty.StringVal("goodbye"),
cty.StringVal("hello"),
}),
},
},
"length": {
{
`length(["the", "quick", "brown", "bear"])`,
cty.NumberIntVal(4),
},
},
"list": {
{
`list("hello")`,
cty.ListVal([]cty.Value{
cty.StringVal("hello"),
}),
},
},
"log": {
{
`log(1, 10)`,
cty.NumberFloatVal(0),
},
},
"lookup": {
{
`lookup({hello=1, goodbye=42}, "goodbye")`,
cty.NumberIntVal(42),
},
},
"lower": {
{
`lower("HELLO")`,
cty.StringVal("hello"),
},
},
"map": {
{
`map("hello", "world")`,
cty.MapVal(map[string]cty.Value{
"hello": cty.StringVal("world"),
}),
},
},
"matchkeys": {
{
`matchkeys(["a", "b", "c"], ["ref1", "ref2", "ref3"], ["ref1"])`,
cty.ListVal([]cty.Value{
cty.StringVal("a"),
}),
},
},
"max": {
{
`max(12, 54, 3)`,
cty.NumberIntVal(54),
},
},
"md5": {
{
`md5("tada")`,
cty.StringVal("ce47d07243bb6eaf5e1322c81baf9bbf"),
},
},
"merge": {
{
`merge({"a"="b"}, {"c"="d"})`,
cty.ObjectVal(map[string]cty.Value{
"a": cty.StringVal("b"),
"c": cty.StringVal("d"),
}),
},
},
"min": {
{
`min(12, 54, 3)`,
cty.NumberIntVal(3),
},
},
"pathexpand": {
{
`pathexpand("~/test-file")`,
cty.StringVal(filepath.Join(homePath, "test-file")),
},
},
"pow": {
{
`pow(1,0)`,
cty.NumberFloatVal(1),
},
},
"replace": {
{
`replace("hello", "hel", "bel")`,
cty.StringVal("bello"),
},
},
"reverse": {
{
`reverse(["a", true, 0])`,
cty.TupleVal([]cty.Value{cty.Zero, cty.True, cty.StringVal("a")}),
},
},
"rsadecrypt": {
{
fmt.Sprintf("rsadecrypt(%#v, %#v)", CipherBase64, PrivateKey),
cty.StringVal("message"),
},
},
"sethaselement": {
{
`sethaselement(["a", "b"], "b")`,
cty.BoolVal(true),
},
},
"setintersection": {
{
`setintersection(["a", "b"], ["b", "c"], ["b", "d"])`,
cty.SetVal([]cty.Value{
cty.StringVal("b"),
}),
},
},
"setproduct": {
{
`setproduct(["development", "staging", "production"], ["app1", "app2"])`,
cty.ListVal([]cty.Value{
cty.TupleVal([]cty.Value{cty.StringVal("development"), cty.StringVal("app1")}),
cty.TupleVal([]cty.Value{cty.StringVal("development"), cty.StringVal("app2")}),
cty.TupleVal([]cty.Value{cty.StringVal("staging"), cty.StringVal("app1")}),
cty.TupleVal([]cty.Value{cty.StringVal("staging"), cty.StringVal("app2")}),
cty.TupleVal([]cty.Value{cty.StringVal("production"), cty.StringVal("app1")}),
cty.TupleVal([]cty.Value{cty.StringVal("production"), cty.StringVal("app2")}),
}),
},
},
"setunion": {
{
`setunion(["a", "b"], ["b", "c"], ["d"])`,
cty.SetVal([]cty.Value{
cty.StringVal("d"),
cty.StringVal("b"),
cty.StringVal("a"),
cty.StringVal("c"),
}),
},
},
"sha1": {
{
`sha1("test")`,
cty.StringVal("a94a8fe5ccb19ba61c4c0873d391e987982fbbd3"),
},
},
"sha256": {
{
`sha256("test")`,
cty.StringVal("9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"),
},
},
"sha512": {
{
`sha512("test")`,
cty.StringVal("ee26b0dd4af7e749aa1a8ee3c10ae9923f618980772e473f8819a5d4940e0db27ac185f8a0e1d5f84f88bc887fd67b143732c304cc5fa9ad8e6f57f50028a8ff"),
},
},
"signum": {
{
`signum(12)`,
cty.NumberFloatVal(1),
},
},
"slice": {
{
`slice(["a", "b", "c", "d"], 1, 3)`,
cty.ListVal([]cty.Value{
cty.StringVal("b"), cty.StringVal("c"),
}),
},
},
"sort": {
{
`sort(["banana", "apple"])`,
cty.ListVal([]cty.Value{
cty.StringVal("apple"),
cty.StringVal("banana"),
}),
},
},
"split": {
{
`split(" ", "Hello World")`,
cty.ListVal([]cty.Value{
cty.StringVal("Hello"),
cty.StringVal("World"),
}),
},
},
"strrev": {
{
`strrev("hello world")`,
cty.StringVal("dlrow olleh"),
},
},
"substr": {
{
`substr("hello world", 1, 4)`,
cty.StringVal("ello"),
},
},
"templatefile": {
{
`templatefile("hello.tmpl", {name = "Jodie"})`,
cty.StringVal("Hello, Jodie!"),
},
},
"timeadd": {
{
`timeadd("2017-11-22T00:00:00Z", "1s")`,
cty.StringVal("2017-11-22T00:00:01Z"),
},
},
"title": {
{
`title("hello")`,
cty.StringVal("Hello"),
},
},
"tobool": {
{
`tobool("false")`,
cty.False,
},
},
"tolist": {
{
`tolist(["a", "b", "c"])`,
cty.ListVal([]cty.Value{
cty.StringVal("a"), cty.StringVal("b"), cty.StringVal("c"),
}),
},
},
"tomap": {
{
`tomap({"a" = 1, "b" = 2})`,
cty.MapVal(map[string]cty.Value{
"a": cty.NumberIntVal(1),
"b": cty.NumberIntVal(2),
}),
},
},
"tonumber": {
{
`tonumber("42")`,
cty.NumberIntVal(42),
},
},
"toset": {
{
`toset(["a", "b", "c"])`,
cty.SetVal([]cty.Value{
cty.StringVal("a"), cty.StringVal("b"), cty.StringVal("c"),
}),
},
},
"tostring": {
{
`tostring("a")`,
cty.StringVal("a"),
},
},
"transpose": {
{
`transpose({"a" = ["1", "2"], "b" = ["2", "3"]})`,
cty.MapVal(map[string]cty.Value{
"1": cty.ListVal([]cty.Value{cty.StringVal("a")}),
"2": cty.ListVal([]cty.Value{cty.StringVal("a"), cty.StringVal("b")}),
"3": cty.ListVal([]cty.Value{cty.StringVal("b")}),
}),
},
},
"trimspace": {
{
`trimspace(" hello ")`,
cty.StringVal("hello"),
},
},
"upper": {
{
`upper("hello")`,
cty.StringVal("HELLO"),
},
},
"urlencode": {
{
`urlencode("foo:bar@localhost?foo=bar&bar=baz")`,
cty.StringVal("foo%3Abar%40localhost%3Ffoo%3Dbar%26bar%3Dbaz"),
},
},
"values": {
{
`values({"hello"="world", "what's"="up"})`,
cty.TupleVal([]cty.Value{
cty.StringVal("world"),
cty.StringVal("up"),
}),
},
},
"zipmap": {
{
`zipmap(["hello", "bar"], ["world", "baz"])`,
cty.ObjectVal(map[string]cty.Value{
"hello": cty.StringVal("world"),
"bar": cty.StringVal("baz"),
}),
},
},
}
data := &dataForTests{} // no variables available; we only need literals here
scope := &Scope{
Data: data,
BaseDir: "./testdata/functions-test", // for the functions that read from the filesystem
}
// Check that there is at least one test case for each function, omitting
// those functions that do not return consistent values
allFunctions := scope.Functions()
// TODO: we can test the impure functions partially by configuring the scope
// with PureOnly: true and then verify that they return unknown values of a
// suitable type.
for _, impureFunc := range impureFunctions {
delete(allFunctions, impureFunc)
}
for f, _ := range scope.Functions() {
if _, ok := tests[f]; !ok {
t.Errorf("Missing test for function %s\n", f)
}
}
for funcName, funcTests := range tests {
t.Run(funcName, func(t *testing.T) {
for _, test := range funcTests {
t.Run(test.src, func(t *testing.T) {
expr, parseDiags := hclsyntax.ParseExpression([]byte(test.src), "test.hcl", hcl.Pos{Line: 1, Column: 1})
if parseDiags.HasErrors() {
for _, diag := range parseDiags {
t.Error(diag.Error())
}
return
}
got, diags := scope.EvalExpr(expr, cty.DynamicPseudoType)
if diags.HasErrors() {
for _, diag := range diags {
t.Errorf("%s: %s", diag.Description().Summary, diag.Description().Detail)
}
return
}
if !test.want.RawEquals(got) {
t.Errorf("wrong result\nexpr: %s\ngot: %#v\nwant: %#v", test.src, got, test.want)
}
})
}
})
}
}
const (
CipherBase64 = "eczGaDhXDbOFRZGhjx2etVzWbRqWDlmq0bvNt284JHVbwCgObiuyX9uV0LSAMY707IEgMkExJqXmsB4OWKxvB7epRB9G/3+F+pcrQpODlDuL9oDUAsa65zEpYF0Wbn7Oh7nrMQncyUPpyr9WUlALl0gRWytOA23S+y5joa4M34KFpawFgoqTu/2EEH4Xl1zo+0fy73fEto+nfkUY+meuyGZ1nUx/+DljP7ZqxHBFSlLODmtuTMdswUbHbXbWneW51D7Jm7xB8nSdiA2JQNK5+Sg5x8aNfgvFTt/m2w2+qpsyFa5Wjeu6fZmXSl840CA07aXbk9vN4I81WmJyblD/ZA=="
PrivateKey = `
-----BEGIN RSA PRIVATE KEY-----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1aSl7WJa27F0DoJdlU9LWerpXcazlJcIdOz/S9QDmSK3RDQTdqfTxRmrxiYI9LEs
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BJOIPDM4ssUTLRq7wYM9uQKBgHCBau5OP8gE6mjKuXsZXWUoahpFLKwwwmJUp2vQ
pOFPJ/6WZOlqkTVT6QPAcPUbTohKrF80hsZqZyDdSfT3peFx4ZLocBrS56m6NmHR
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T8UYnFu6RzkixElTf2rseEav7rkdKkI3LAeIZy7B0HulKKsmqVQ7
-----END RSA PRIVATE KEY-----
`
Poem = `Fleas:
Adam
Had'em
E.E. Cummings`
)

1
lang/testdata/functions-test/hello.tmpl vendored Normal file
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@ -0,0 +1 @@
Hello, ${name}!

1
lang/testdata/functions-test/hello.txt vendored Normal file
View File

@ -0,0 +1 @@
hello!

8
website/docs/configuration/functions/coalescelist.html.md
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@ -19,23 +19,23 @@ that isn't empty.
## Examples ## Examples
``` ```
> coalesce(["a", "b"], ["c", "d"]) > coalescelist(["a", "b"], ["c", "d"])
[ [
"a", "a",
"b", "b",
] ]
> coalesce([], ["c", "d"]) > coalescelist([], ["c", "d"])
[ [
"c", "c",
"d", "d",
] ]
``` ```
To perform the `coalesce` operation with a list of lists, use the `...` To perform the `coalescelist` operation with a list of lists, use the `...`
symbol to expand the outer list as arguments: symbol to expand the outer list as arguments:
``` ```
> coalesce([[], ["c", "d"]]...) > coalescelist([[], ["c", "d"]]...)
[ [
"c", "c",
"d", "d",

27
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@ -0,0 +1,27 @@
---
layout: "functions"
page_title: "concat - Functions - Configuration Language"
sidebar_current: "docs-funcs-collection-concat"
description: |-
The concat function combines two or more lists into a single list.
---
# `concat` Function
-> **Note:** This page is about Terraform 0.12 and later. For Terraform 0.11 and
earlier, see
[0.11 Configuration Language: Interpolation Syntax](../../configuration-0-11/interpolation.html).
`concat` takes two or more lists and combines them into a single list.
## Examples
```
> concat(["a", ""], ["b", "c"])
[
"a",
"",
"b",
"c",
]
```

12
website/docs/configuration/functions/csvdecode.html.md
View File

@ -31,14 +31,14 @@ number of fields, or this function will produce an error.
> csvdecode("a,b,c\n1,2,3\n4,5,6") > csvdecode("a,b,c\n1,2,3\n4,5,6")
[ [
{ {
"a" = 1 "a" = "1"
"b" = 2 "b" = "2"
"c" = 3 "c" = "3"
}, },
{ {
"a" = 4 "a" = "4"
"b" = 5 "b" = "5"
"c" = 6 "c" = "6"
} }
] ]
``` ```

4
website/layouts/functions.erb
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@ -130,6 +130,10 @@
<a href="/docs/configuration/functions/compact.html">compact</a> <a href="/docs/configuration/functions/compact.html">compact</a>
</li> </li>
<li>
<a href="/docs/configuration/functions/concat.html">concat</a>
</li>
<li> <li>
<a href="/docs/configuration/functions/contains.html">contains</a> <a href="/docs/configuration/functions/contains.html">contains</a>
</li> </li>