package config import ( "fmt" "io/ioutil" "os" "reflect" "testing" "github.com/hashicorp/terraform/config/lang" "github.com/hashicorp/terraform/config/lang/ast" ) func TestInterpolateFuncConcat(t *testing.T) { testFunction(t, testFunctionConfig{ Cases: []testFunctionCase{ { `${concat("foo", "bar")}`, "foobar", false, }, { `${concat("foo")}`, "foo", false, }, { `${concat()}`, nil, true, }, }, }) } func TestInterpolateFuncFile(t *testing.T) { tf, err := ioutil.TempFile("", "tf") if err != nil { t.Fatalf("err: %s", err) } path := tf.Name() tf.Write([]byte("foo")) tf.Close() defer os.Remove(path) testFunction(t, testFunctionConfig{ Cases: []testFunctionCase{ { fmt.Sprintf(`${file("%s")}`, path), "foo", false, }, // Invalid path { `${file("/i/dont/exist")}`, nil, true, }, // Too many args { `${file("foo", "bar")}`, nil, true, }, }, }) } 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, }, { `${format("hello %05d", 12345)}`, "hello 12345", false, }, }, }) } func TestInterpolateFuncJoin(t *testing.T) { testFunction(t, testFunctionConfig{ Cases: []testFunctionCase{ { `${join(",")}`, nil, true, }, { `${join(",", "foo")}`, "foo", false, }, /* TODO { `${join(",", "foo", "bar")}`, "foo,bar", false, }, */ { fmt.Sprintf(`${join(".", "%s")}`, fmt.Sprintf( "foo%sbar%sbaz", InterpSplitDelim, InterpSplitDelim)), "foo.bar.baz", false, }, }, }) } func TestInterpolateFuncReplace(t *testing.T) { testFunction(t, testFunctionConfig{ Cases: []testFunctionCase{ // Regular search and replace { `${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$1")}`, "hello", false, }, // Bad regexp { `${replace("helo", "/(l/", "$1$1")}`, nil, true, }, }, }) } func TestInterpolateFuncLength(t *testing.T) { testFunction(t, testFunctionConfig{ Cases: []testFunctionCase{ // Raw strings { `${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, }, { `${length(split(".", "one.two.three.four.five"))}`, "5", false, }, }, }) } func TestInterpolateFuncSplit(t *testing.T) { testFunction(t, testFunctionConfig{ Cases: []testFunctionCase{ { `${split(",")}`, nil, true, }, { `${split(",", "foo")}`, "foo", false, }, { `${split(",", ",,,")}`, fmt.Sprintf( "%s%s%s", InterpSplitDelim, InterpSplitDelim, InterpSplitDelim), false, }, { `${split(",", "foo,")}`, fmt.Sprintf( "%s%s", "foo", InterpSplitDelim), false, }, { `${split(",", ",foo,")}`, fmt.Sprintf( "%s%s%s", InterpSplitDelim, "foo", InterpSplitDelim), false, }, { `${split(".", "foo.bar.baz")}`, fmt.Sprintf( "foo%sbar%sbaz", InterpSplitDelim, InterpSplitDelim), false, }, }, }) } func TestInterpolateFuncLookup(t *testing.T) { testFunction(t, testFunctionConfig{ Vars: map[string]ast.Variable{ "var.foo.bar": ast.Variable{ Value: "baz", Type: ast.TypeString, }, }, Cases: []testFunctionCase{ { `${lookup("foo", "bar")}`, "baz", false, }, // Invalid key { `${lookup("foo", "baz")}`, nil, true, }, // Too many args { `${lookup("foo", "bar", "baz")}`, nil, true, }, }, }) } func TestInterpolateFuncElement(t *testing.T) { testFunction(t, testFunctionConfig{ Cases: []testFunctionCase{ { fmt.Sprintf(`${element("%s", "1")}`, "foo"+InterpSplitDelim+"baz"), "baz", false, }, { `${element("foo", "0")}`, "foo", false, }, // Invalid index should wrap vs. out-of-bounds { fmt.Sprintf(`${element("%s", "2")}`, "foo"+InterpSplitDelim+"baz"), "foo", false, }, // Too many args { fmt.Sprintf(`${element("%s", "0", "2")}`, "foo"+InterpSplitDelim+"baz"), nil, true, }, }, }) } type testFunctionConfig struct { Cases []testFunctionCase Vars map[string]ast.Variable } type testFunctionCase struct { Input string Result interface{} Error bool } func testFunction(t *testing.T, config testFunctionConfig) { for i, tc := range config.Cases { ast, err := lang.Parse(tc.Input) if err != nil { t.Fatalf("%d: err: %s", i, err) } out, _, err := lang.Eval(ast, langEvalConfig(config.Vars)) if (err != nil) != tc.Error { t.Fatalf("%d: err: %s", i, err) } if !reflect.DeepEqual(out, tc.Result) { t.Fatalf( "%d: bad output for input: %s\n\nOutput: %#v\nExpected: %#v", i, tc.Input, out, tc.Result) } } }