terraform/config/interpolate_funcs_test.go

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package config
import (
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"fmt"
"io/ioutil"
"os"
"reflect"
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"testing"
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"github.com/hashicorp/terraform/config/lang"
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"github.com/hashicorp/terraform/config/lang/ast"
)
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func TestInterpolateFuncCompact(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
// empty string within array
{
`${compact(split(",", "a,,b"))}`,
NewStringList([]string{"a", "b"}).String(),
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false,
},
// empty string at the end of array
{
`${compact(split(",", "a,b,"))}`,
NewStringList([]string{"a", "b"}).String(),
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false,
},
// single empty string
{
`${compact(split(",", ""))}`,
NewStringList([]string{}).String(),
false,
},
},
})
}
func TestInterpolateFuncCidrHost(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${cidrhost("192.168.1.0/24", 5)}`,
"192.168.1.5",
false,
},
{
`${cidrhost("192.168.1.0/30", 255)}`,
nil,
true, // 255 doesn't fit in two bits
},
{
`${cidrhost("not-a-cidr", 6)}`,
nil,
true, // not a valid CIDR mask
},
{
`${cidrhost("10.256.0.0/8", 6)}`,
nil,
true, // can't have an octet >255
},
},
})
}
func TestInterpolateFuncCidrNetmask(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${cidrnetmask("192.168.1.0/24")}`,
"255.255.255.0",
false,
},
{
`${cidrnetmask("192.168.1.0/32")}`,
"255.255.255.255",
false,
},
{
`${cidrnetmask("0.0.0.0/0")}`,
"0.0.0.0",
false,
},
{
// This doesn't really make sense for IPv6 networks
// but it ought to do something sensible anyway.
`${cidrnetmask("1::/64")}`,
"ffff:ffff:ffff:ffff::",
false,
},
{
`${cidrnetmask("not-a-cidr")}`,
nil,
true, // not a valid CIDR mask
},
{
`${cidrnetmask("10.256.0.0/8")}`,
nil,
true, // can't have an octet >255
},
},
})
}
func TestInterpolateFuncCidrSubnet(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${cidrsubnet("192.168.2.0/20", 4, 6)}`,
"192.168.6.0/24",
false,
},
{
`${cidrsubnet("fe80::/48", 16, 6)}`,
"fe80:0:0:6::/64",
false,
},
{
// IPv4 address encoded in IPv6 syntax gets normalized
`${cidrsubnet("::ffff:192.168.0.0/112", 8, 6)}`,
"192.168.6.0/24",
false,
},
{
`${cidrsubnet("192.168.0.0/30", 4, 6)}`,
nil,
true, // not enough bits left
},
{
`${cidrsubnet("192.168.0.0/16", 2, 16)}`,
nil,
true, // can't encode 16 in 2 bits
},
{
`${cidrsubnet("not-a-cidr", 4, 6)}`,
nil,
true, // not a valid CIDR mask
},
{
`${cidrsubnet("10.256.0.0/8", 4, 6)}`,
nil,
true, // can't have an octet >255
},
},
})
}
func TestInterpolateFuncDeprecatedConcat(t *testing.T) {
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testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${concat("foo", "bar")}`,
"foobar",
false,
},
{
`${concat("foo")}`,
"foo",
false,
},
{
`${concat()}`,
nil,
true,
},
},
})
}
func TestInterpolateFuncConcat(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
// String + list
{
`${concat("a", split(",", "b,c"))}`,
NewStringList([]string{"a", "b", "c"}).String(),
false,
},
// List + string
{
`${concat(split(",", "a,b"), "c")}`,
NewStringList([]string{"a", "b", "c"}).String(),
false,
},
// Single list
{
`${concat(split(",", ",foo,"))}`,
NewStringList([]string{"", "foo", ""}).String(),
false,
},
{
`${concat(split(",", "a,b,c"))}`,
NewStringList([]string{"a", "b", "c"}).String(),
false,
},
// Two lists
{
`${concat(split(",", "a,b,c"), split(",", "d,e"))}`,
NewStringList([]string{"a", "b", "c", "d", "e"}).String(),
false,
},
// Two lists with different separators
{
`${concat(split(",", "a,b,c"), split(" ", "d e"))}`,
NewStringList([]string{"a", "b", "c", "d", "e"}).String(),
false,
},
// More lists
{
`${concat(split(",", "a,b"), split(",", "c,d"), split(",", "e,f"), split(",", "0,1"))}`,
NewStringList([]string{"a", "b", "c", "d", "e", "f", "0", "1"}).String(),
false,
},
},
})
}
func TestInterpolateFuncFile(t *testing.T) {
tf, err := ioutil.TempFile("", "tf")
if err != nil {
t.Fatalf("err: %s", err)
}
path := tf.Name()
tf.Write([]byte("foo"))
tf.Close()
defer os.Remove(path)
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testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
fmt.Sprintf(`${file("%s")}`, path),
"foo",
false,
},
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// Invalid path
{
`${file("/i/dont/exist")}`,
nil,
true,
},
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// Too many args
{
`${file("foo", "bar")}`,
nil,
true,
},
},
})
}
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func TestInterpolateFuncFormat(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${format("hello")}`,
"hello",
false,
},
{
`${format("hello %s", "world")}`,
"hello world",
false,
},
{
`${format("hello %d", 42)}`,
"hello 42",
false,
},
{
`${format("hello %05d", 42)}`,
"hello 00042",
false,
},
{
`${format("hello %05d", 12345)}`,
"hello 12345",
false,
},
},
})
}
func TestInterpolateFuncFormatList(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
// formatlist requires at least one list
{
`${formatlist("hello")}`,
nil,
true,
},
{
`${formatlist("hello %s", "world")}`,
nil,
true,
},
// formatlist applies to each list element in turn
{
`${formatlist("<%s>", split(",", "A,B"))}`,
NewStringList([]string{"<A>", "<B>"}).String(),
false,
},
// formatlist repeats scalar elements
{
`${join(", ", formatlist("%s=%s", "x", split(",", "A,B,C")))}`,
"x=A, x=B, x=C",
false,
},
// Multiple lists are walked in parallel
{
`${join(", ", formatlist("%s=%s", split(",", "A,B,C"), split(",", "1,2,3")))}`,
"A=1, B=2, C=3",
false,
},
// Mismatched list lengths generate an error
{
`${formatlist("%s=%2s", split(",", "A,B,C,D"), split(",", "1,2,3"))}`,
nil,
true,
},
// Works with lists of length 1 [GH-2240]
{
`${formatlist("%s.id", split(",", "demo-rest-elb"))}`,
NewStringList([]string{"demo-rest-elb.id"}).String(),
false,
},
},
})
}
func TestInterpolateFuncIndex(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${index("test", "")}`,
nil,
true,
},
{
fmt.Sprintf(`${index("%s", "foo")}`,
NewStringList([]string{"notfoo", "stillnotfoo", "bar"}).String()),
nil,
true,
},
{
fmt.Sprintf(`${index("%s", "foo")}`,
NewStringList([]string{"foo"}).String()),
"0",
false,
},
{
fmt.Sprintf(`${index("%s", "bar")}`,
NewStringList([]string{"foo", "spam", "bar", "eggs"}).String()),
"2",
false,
},
},
})
}
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func TestInterpolateFuncJoin(t *testing.T) {
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testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${join(",")}`,
nil,
true,
},
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{
fmt.Sprintf(`${join(",", "%s")}`,
NewStringList([]string{"foo"}).String()),
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"foo",
false,
},
/*
TODO
{
`${join(",", "foo", "bar")}`,
"foo,bar",
false,
},
*/
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{
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fmt.Sprintf(`${join(".", "%s")}`,
NewStringList([]string{"foo", "bar", "baz"}).String()),
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"foo.bar.baz",
false,
},
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},
})
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}
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func TestInterpolateFuncReplace(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
// Regular search and replace
{
`${replace("hello", "hel", "bel")}`,
"bello",
false,
},
// Search string doesn't match
{
`${replace("hello", "nope", "bel")}`,
"hello",
false,
},
// Regular expression
{
`${replace("hello", "/l/", "L")}`,
"heLLo",
false,
},
{
`${replace("helo", "/(l)/", "$1$1")}`,
"hello",
false,
},
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// Bad regexp
{
`${replace("helo", "/(l/", "$1$1")}`,
nil,
true,
},
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},
})
}
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func TestInterpolateFuncLength(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
// Raw strings
{
`${length("")}`,
"0",
false,
},
{
`${length("a")}`,
"1",
false,
},
{
`${length(" ")}`,
"1",
false,
},
{
`${length(" a ,")}`,
"4",
false,
},
{
`${length("aaa")}`,
"3",
false,
},
// Lists
{
`${length(split(",", "a"))}`,
"1",
false,
},
{
`${length(split(",", "foo,"))}`,
"2",
false,
},
{
`${length(split(",", ",foo,"))}`,
"3",
false,
},
{
`${length(split(",", "foo,bar"))}`,
"2",
false,
},
{
`${length(split(".", "one.two.three.four.five"))}`,
"5",
false,
},
},
})
}
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func TestInterpolateFuncSplit(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${split(",")}`,
nil,
true,
},
{
`${split(",", "")}`,
NewStringList([]string{""}).String(),
false,
},
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{
`${split(",", "foo")}`,
NewStringList([]string{"foo"}).String(),
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false,
},
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{
`${split(",", ",,,")}`,
NewStringList([]string{"", "", "", ""}).String(),
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false,
},
{
`${split(",", "foo,")}`,
NewStringList([]string{"foo", ""}).String(),
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false,
},
{
`${split(",", ",foo,")}`,
NewStringList([]string{"", "foo", ""}).String(),
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false,
},
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{
`${split(".", "foo.bar.baz")}`,
NewStringList([]string{"foo", "bar", "baz"}).String(),
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false,
},
},
})
}
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func TestInterpolateFuncLookup(t *testing.T) {
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testFunction(t, testFunctionConfig{
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Vars: map[string]ast.Variable{
"var.foo.bar": ast.Variable{
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Value: "baz",
Type: ast.TypeString,
},
},
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Cases: []testFunctionCase{
{
`${lookup("foo", "bar")}`,
"baz",
false,
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},
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// Invalid key
{
`${lookup("foo", "baz")}`,
nil,
true,
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},
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// Too many args
{
`${lookup("foo", "bar", "baz")}`,
nil,
true,
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},
},
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})
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}
func TestInterpolateFuncKeys(t *testing.T) {
testFunction(t, testFunctionConfig{
Vars: map[string]ast.Variable{
"var.foo.bar": ast.Variable{
Value: "baz",
Type: ast.TypeString,
},
"var.foo.qux": ast.Variable{
Value: "quack",
Type: ast.TypeString,
},
"var.str": ast.Variable{
Value: "astring",
Type: ast.TypeString,
},
},
Cases: []testFunctionCase{
{
`${keys("foo")}`,
NewStringList([]string{"bar", "qux"}).String(),
false,
},
// Invalid key
{
`${keys("not")}`,
nil,
true,
},
// Too many args
{
`${keys("foo", "bar")}`,
nil,
true,
},
// Not a map
{
`${keys("str")}`,
nil,
true,
},
},
})
}
func TestInterpolateFuncValues(t *testing.T) {
testFunction(t, testFunctionConfig{
Vars: map[string]ast.Variable{
"var.foo.bar": ast.Variable{
Value: "quack",
Type: ast.TypeString,
},
"var.foo.qux": ast.Variable{
Value: "baz",
Type: ast.TypeString,
},
"var.str": ast.Variable{
Value: "astring",
Type: ast.TypeString,
},
},
Cases: []testFunctionCase{
{
`${values("foo")}`,
NewStringList([]string{"quack", "baz"}).String(),
false,
},
// Invalid key
{
`${values("not")}`,
nil,
true,
},
// Too many args
{
`${values("foo", "bar")}`,
nil,
true,
},
// Not a map
{
`${values("str")}`,
nil,
true,
},
},
})
}
func TestInterpolateFuncElement(t *testing.T) {
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testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
fmt.Sprintf(`${element("%s", "1")}`,
NewStringList([]string{"foo", "baz"}).String()),
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"baz",
false,
},
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{
fmt.Sprintf(`${element("%s", "0")}`,
NewStringList([]string{"foo"}).String()),
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"foo",
false,
},
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// Invalid index should wrap vs. out-of-bounds
{
fmt.Sprintf(`${element("%s", "2")}`,
NewStringList([]string{"foo", "baz"}).String()),
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"foo",
false,
},
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// Too many args
{
fmt.Sprintf(`${element("%s", "0", "2")}`,
NewStringList([]string{"foo", "baz"}).String()),
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nil,
true,
},
},
})
}
func TestInterpolateFuncBase64Encode(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
// Regular base64 encoding
{
`${base64encode("abc123!?$*&()'-=@~")}`,
"YWJjMTIzIT8kKiYoKSctPUB+",
false,
},
},
})
}
func TestInterpolateFuncBase64Decode(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
// Regular base64 decoding
{
`${base64decode("YWJjMTIzIT8kKiYoKSctPUB+")}`,
"abc123!?$*&()'-=@~",
false,
},
// Invalid base64 data decoding
{
`${base64decode("this-is-an-invalid-base64-data")}`,
nil,
true,
},
},
})
}
func TestInterpolateFuncLower(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${lower("HELLO")}`,
"hello",
false,
},
{
`${lower("")}`,
"",
false,
},
{
`${lower()}`,
nil,
true,
},
},
})
}
func TestInterpolateFuncUpper(t *testing.T) {
testFunction(t, testFunctionConfig{
Cases: []testFunctionCase{
{
`${upper("hello")}`,
"HELLO",
false,
},
{
`${upper("")}`,
"",
false,
},
{
`${upper()}`,
nil,
true,
},
},
})
}
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type testFunctionConfig struct {
Cases []testFunctionCase
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Vars map[string]ast.Variable
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}
type testFunctionCase struct {
Input string
Result interface{}
Error bool
}
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func testFunction(t *testing.T, config testFunctionConfig) {
for i, tc := range config.Cases {
ast, err := lang.Parse(tc.Input)
if err != nil {
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t.Fatalf("Case #%d: input: %#v\nerr: %s", i, tc.Input, err)
}
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out, _, err := lang.Eval(ast, langEvalConfig(config.Vars))
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if err != nil != tc.Error {
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t.Fatalf("Case #%d:\ninput: %#v\nerr: %s", i, tc.Input, err)
}
if !reflect.DeepEqual(out, tc.Result) {
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t.Fatalf(
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"%d: bad output for input: %s\n\nOutput: %#v\nExpected: %#v",
i, tc.Input, out, tc.Result)
}
}
}