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-rw-r--r--src/text/template/parse/parse_test.go711
1 files changed, 711 insertions, 0 deletions
diff --git a/src/text/template/parse/parse_test.go b/src/text/template/parse/parse_test.go
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+++ b/src/text/template/parse/parse_test.go
@@ -0,0 +1,711 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package parse
+
+import (
+ "flag"
+ "fmt"
+ "strings"
+ "testing"
+)
+
+var debug = flag.Bool("debug", false, "show the errors produced by the main tests")
+
+type numberTest struct {
+ text string
+ isInt bool
+ isUint bool
+ isFloat bool
+ isComplex bool
+ int64
+ uint64
+ float64
+ complex128
+}
+
+var numberTests = []numberTest{
+ // basics
+ {"0", true, true, true, false, 0, 0, 0, 0},
+ {"-0", true, true, true, false, 0, 0, 0, 0}, // check that -0 is a uint.
+ {"73", true, true, true, false, 73, 73, 73, 0},
+ {"7_3", true, true, true, false, 73, 73, 73, 0},
+ {"0b10_010_01", true, true, true, false, 73, 73, 73, 0},
+ {"0B10_010_01", true, true, true, false, 73, 73, 73, 0},
+ {"073", true, true, true, false, 073, 073, 073, 0},
+ {"0o73", true, true, true, false, 073, 073, 073, 0},
+ {"0O73", true, true, true, false, 073, 073, 073, 0},
+ {"0x73", true, true, true, false, 0x73, 0x73, 0x73, 0},
+ {"0X73", true, true, true, false, 0x73, 0x73, 0x73, 0},
+ {"0x7_3", true, true, true, false, 0x73, 0x73, 0x73, 0},
+ {"-73", true, false, true, false, -73, 0, -73, 0},
+ {"+73", true, false, true, false, 73, 0, 73, 0},
+ {"100", true, true, true, false, 100, 100, 100, 0},
+ {"1e9", true, true, true, false, 1e9, 1e9, 1e9, 0},
+ {"-1e9", true, false, true, false, -1e9, 0, -1e9, 0},
+ {"-1.2", false, false, true, false, 0, 0, -1.2, 0},
+ {"1e19", false, true, true, false, 0, 1e19, 1e19, 0},
+ {"1e1_9", false, true, true, false, 0, 1e19, 1e19, 0},
+ {"1E19", false, true, true, false, 0, 1e19, 1e19, 0},
+ {"-1e19", false, false, true, false, 0, 0, -1e19, 0},
+ {"0x_1p4", true, true, true, false, 16, 16, 16, 0},
+ {"0X_1P4", true, true, true, false, 16, 16, 16, 0},
+ {"0x_1p-4", false, false, true, false, 0, 0, 1 / 16., 0},
+ {"4i", false, false, false, true, 0, 0, 0, 4i},
+ {"-1.2+4.2i", false, false, false, true, 0, 0, 0, -1.2 + 4.2i},
+ {"073i", false, false, false, true, 0, 0, 0, 73i}, // not octal!
+ // complex with 0 imaginary are float (and maybe integer)
+ {"0i", true, true, true, true, 0, 0, 0, 0},
+ {"-1.2+0i", false, false, true, true, 0, 0, -1.2, -1.2},
+ {"-12+0i", true, false, true, true, -12, 0, -12, -12},
+ {"13+0i", true, true, true, true, 13, 13, 13, 13},
+ // funny bases
+ {"0123", true, true, true, false, 0123, 0123, 0123, 0},
+ {"-0x0", true, true, true, false, 0, 0, 0, 0},
+ {"0xdeadbeef", true, true, true, false, 0xdeadbeef, 0xdeadbeef, 0xdeadbeef, 0},
+ // character constants
+ {`'a'`, true, true, true, false, 'a', 'a', 'a', 0},
+ {`'\n'`, true, true, true, false, '\n', '\n', '\n', 0},
+ {`'\\'`, true, true, true, false, '\\', '\\', '\\', 0},
+ {`'\''`, true, true, true, false, '\'', '\'', '\'', 0},
+ {`'\xFF'`, true, true, true, false, 0xFF, 0xFF, 0xFF, 0},
+ {`'パ'`, true, true, true, false, 0x30d1, 0x30d1, 0x30d1, 0},
+ {`'\u30d1'`, true, true, true, false, 0x30d1, 0x30d1, 0x30d1, 0},
+ {`'\U000030d1'`, true, true, true, false, 0x30d1, 0x30d1, 0x30d1, 0},
+ // some broken syntax
+ {text: "+-2"},
+ {text: "0x123."},
+ {text: "1e."},
+ {text: "0xi."},
+ {text: "1+2."},
+ {text: "'x"},
+ {text: "'xx'"},
+ {text: "'433937734937734969526500969526500'"}, // Integer too large - issue 10634.
+ // Issue 8622 - 0xe parsed as floating point. Very embarrassing.
+ {"0xef", true, true, true, false, 0xef, 0xef, 0xef, 0},
+}
+
+func TestNumberParse(t *testing.T) {
+ for _, test := range numberTests {
+ // If fmt.Sscan thinks it's complex, it's complex. We can't trust the output
+ // because imaginary comes out as a number.
+ var c complex128
+ typ := itemNumber
+ var tree *Tree
+ if test.text[0] == '\'' {
+ typ = itemCharConstant
+ } else {
+ _, err := fmt.Sscan(test.text, &c)
+ if err == nil {
+ typ = itemComplex
+ }
+ }
+ n, err := tree.newNumber(0, test.text, typ)
+ ok := test.isInt || test.isUint || test.isFloat || test.isComplex
+ if ok && err != nil {
+ t.Errorf("unexpected error for %q: %s", test.text, err)
+ continue
+ }
+ if !ok && err == nil {
+ t.Errorf("expected error for %q", test.text)
+ continue
+ }
+ if !ok {
+ if *debug {
+ fmt.Printf("%s\n\t%s\n", test.text, err)
+ }
+ continue
+ }
+ if n.IsComplex != test.isComplex {
+ t.Errorf("complex incorrect for %q; should be %t", test.text, test.isComplex)
+ }
+ if test.isInt {
+ if !n.IsInt {
+ t.Errorf("expected integer for %q", test.text)
+ }
+ if n.Int64 != test.int64 {
+ t.Errorf("int64 for %q should be %d Is %d", test.text, test.int64, n.Int64)
+ }
+ } else if n.IsInt {
+ t.Errorf("did not expect integer for %q", test.text)
+ }
+ if test.isUint {
+ if !n.IsUint {
+ t.Errorf("expected unsigned integer for %q", test.text)
+ }
+ if n.Uint64 != test.uint64 {
+ t.Errorf("uint64 for %q should be %d Is %d", test.text, test.uint64, n.Uint64)
+ }
+ } else if n.IsUint {
+ t.Errorf("did not expect unsigned integer for %q", test.text)
+ }
+ if test.isFloat {
+ if !n.IsFloat {
+ t.Errorf("expected float for %q", test.text)
+ }
+ if n.Float64 != test.float64 {
+ t.Errorf("float64 for %q should be %g Is %g", test.text, test.float64, n.Float64)
+ }
+ } else if n.IsFloat {
+ t.Errorf("did not expect float for %q", test.text)
+ }
+ if test.isComplex {
+ if !n.IsComplex {
+ t.Errorf("expected complex for %q", test.text)
+ }
+ if n.Complex128 != test.complex128 {
+ t.Errorf("complex128 for %q should be %g Is %g", test.text, test.complex128, n.Complex128)
+ }
+ } else if n.IsComplex {
+ t.Errorf("did not expect complex for %q", test.text)
+ }
+ }
+}
+
+type parseTest struct {
+ name string
+ input string
+ ok bool
+ result string // what the user would see in an error message.
+}
+
+const (
+ noError = true
+ hasError = false
+)
+
+var parseTests = []parseTest{
+ {"empty", "", noError,
+ ``},
+ {"comment", "{{/*\n\n\n*/}}", noError,
+ ``},
+ {"spaces", " \t\n", noError,
+ `" \t\n"`},
+ {"text", "some text", noError,
+ `"some text"`},
+ {"emptyAction", "{{}}", hasError,
+ `{{}}`},
+ {"field", "{{.X}}", noError,
+ `{{.X}}`},
+ {"simple command", "{{printf}}", noError,
+ `{{printf}}`},
+ {"$ invocation", "{{$}}", noError,
+ "{{$}}"},
+ {"variable invocation", "{{with $x := 3}}{{$x 23}}{{end}}", noError,
+ "{{with $x := 3}}{{$x 23}}{{end}}"},
+ {"variable with fields", "{{$.I}}", noError,
+ "{{$.I}}"},
+ {"multi-word command", "{{printf `%d` 23}}", noError,
+ "{{printf `%d` 23}}"},
+ {"pipeline", "{{.X|.Y}}", noError,
+ `{{.X | .Y}}`},
+ {"pipeline with decl", "{{$x := .X|.Y}}", noError,
+ `{{$x := .X | .Y}}`},
+ {"nested pipeline", "{{.X (.Y .Z) (.A | .B .C) (.E)}}", noError,
+ `{{.X (.Y .Z) (.A | .B .C) (.E)}}`},
+ {"field applied to parentheses", "{{(.Y .Z).Field}}", noError,
+ `{{(.Y .Z).Field}}`},
+ {"simple if", "{{if .X}}hello{{end}}", noError,
+ `{{if .X}}"hello"{{end}}`},
+ {"if with else", "{{if .X}}true{{else}}false{{end}}", noError,
+ `{{if .X}}"true"{{else}}"false"{{end}}`},
+ {"if with else if", "{{if .X}}true{{else if .Y}}false{{end}}", noError,
+ `{{if .X}}"true"{{else}}{{if .Y}}"false"{{end}}{{end}}`},
+ {"if else chain", "+{{if .X}}X{{else if .Y}}Y{{else if .Z}}Z{{end}}+", noError,
+ `"+"{{if .X}}"X"{{else}}{{if .Y}}"Y"{{else}}{{if .Z}}"Z"{{end}}{{end}}{{end}}"+"`},
+ {"simple range", "{{range .X}}hello{{end}}", noError,
+ `{{range .X}}"hello"{{end}}`},
+ {"chained field range", "{{range .X.Y.Z}}hello{{end}}", noError,
+ `{{range .X.Y.Z}}"hello"{{end}}`},
+ {"nested range", "{{range .X}}hello{{range .Y}}goodbye{{end}}{{end}}", noError,
+ `{{range .X}}"hello"{{range .Y}}"goodbye"{{end}}{{end}}`},
+ {"range with else", "{{range .X}}true{{else}}false{{end}}", noError,
+ `{{range .X}}"true"{{else}}"false"{{end}}`},
+ {"range over pipeline", "{{range .X|.M}}true{{else}}false{{end}}", noError,
+ `{{range .X | .M}}"true"{{else}}"false"{{end}}`},
+ {"range []int", "{{range .SI}}{{.}}{{end}}", noError,
+ `{{range .SI}}{{.}}{{end}}`},
+ {"range 1 var", "{{range $x := .SI}}{{.}}{{end}}", noError,
+ `{{range $x := .SI}}{{.}}{{end}}`},
+ {"range 2 vars", "{{range $x, $y := .SI}}{{.}}{{end}}", noError,
+ `{{range $x, $y := .SI}}{{.}}{{end}}`},
+ {"range with break", "{{range .SI}}{{.}}{{break}}{{end}}", noError,
+ `{{range .SI}}{{.}}{{break}}{{end}}`},
+ {"range with continue", "{{range .SI}}{{.}}{{continue}}{{end}}", noError,
+ `{{range .SI}}{{.}}{{continue}}{{end}}`},
+ {"constants", "{{range .SI 1 -3.2i true false 'a' nil}}{{end}}", noError,
+ `{{range .SI 1 -3.2i true false 'a' nil}}{{end}}`},
+ {"template", "{{template `x`}}", noError,
+ `{{template "x"}}`},
+ {"template with arg", "{{template `x` .Y}}", noError,
+ `{{template "x" .Y}}`},
+ {"with", "{{with .X}}hello{{end}}", noError,
+ `{{with .X}}"hello"{{end}}`},
+ {"with with else", "{{with .X}}hello{{else}}goodbye{{end}}", noError,
+ `{{with .X}}"hello"{{else}}"goodbye"{{end}}`},
+ // Trimming spaces.
+ {"trim left", "x \r\n\t{{- 3}}", noError, `"x"{{3}}`},
+ {"trim right", "{{3 -}}\n\n\ty", noError, `{{3}}"y"`},
+ {"trim left and right", "x \r\n\t{{- 3 -}}\n\n\ty", noError, `"x"{{3}}"y"`},
+ {"trim with extra spaces", "x\n{{- 3 -}}\ny", noError, `"x"{{3}}"y"`},
+ {"comment trim left", "x \r\n\t{{- /* hi */}}", noError, `"x"`},
+ {"comment trim right", "{{/* hi */ -}}\n\n\ty", noError, `"y"`},
+ {"comment trim left and right", "x \r\n\t{{- /* */ -}}\n\n\ty", noError, `"x""y"`},
+ {"block definition", `{{block "foo" .}}hello{{end}}`, noError,
+ `{{template "foo" .}}`},
+
+ {"newline in assignment", "{{ $x \n := \n 1 \n }}", noError, "{{$x := 1}}"},
+ {"newline in empty action", "{{\n}}", hasError, "{{\n}}"},
+ {"newline in pipeline", "{{\n\"x\"\n|\nprintf\n}}", noError, `{{"x" | printf}}`},
+ {"newline in comment", "{{/*\nhello\n*/}}", noError, ""},
+ {"newline in comment", "{{-\n/*\nhello\n*/\n-}}", noError, ""},
+ {"spaces around continue", "{{range .SI}}{{.}}{{ continue }}{{end}}", noError,
+ `{{range .SI}}{{.}}{{continue}}{{end}}`},
+ {"spaces around break", "{{range .SI}}{{.}}{{ break }}{{end}}", noError,
+ `{{range .SI}}{{.}}{{break}}{{end}}`},
+
+ // Errors.
+ {"unclosed action", "hello{{range", hasError, ""},
+ {"unmatched end", "{{end}}", hasError, ""},
+ {"unmatched else", "{{else}}", hasError, ""},
+ {"unmatched else after if", "{{if .X}}hello{{end}}{{else}}", hasError, ""},
+ {"multiple else", "{{if .X}}1{{else}}2{{else}}3{{end}}", hasError, ""},
+ {"missing end", "hello{{range .x}}", hasError, ""},
+ {"missing end after else", "hello{{range .x}}{{else}}", hasError, ""},
+ {"undefined function", "hello{{undefined}}", hasError, ""},
+ {"undefined variable", "{{$x}}", hasError, ""},
+ {"variable undefined after end", "{{with $x := 4}}{{end}}{{$x}}", hasError, ""},
+ {"variable undefined in template", "{{template $v}}", hasError, ""},
+ {"declare with field", "{{with $x.Y := 4}}{{end}}", hasError, ""},
+ {"template with field ref", "{{template .X}}", hasError, ""},
+ {"template with var", "{{template $v}}", hasError, ""},
+ {"invalid punctuation", "{{printf 3, 4}}", hasError, ""},
+ {"multidecl outside range", "{{with $v, $u := 3}}{{end}}", hasError, ""},
+ {"too many decls in range", "{{range $u, $v, $w := 3}}{{end}}", hasError, ""},
+ {"dot applied to parentheses", "{{printf (printf .).}}", hasError, ""},
+ {"adjacent args", "{{printf 3`x`}}", hasError, ""},
+ {"adjacent args with .", "{{printf `x`.}}", hasError, ""},
+ {"extra end after if", "{{if .X}}a{{else if .Y}}b{{end}}{{end}}", hasError, ""},
+ {"break outside range", "{{range .}}{{end}} {{break}}", hasError, ""},
+ {"continue outside range", "{{range .}}{{end}} {{continue}}", hasError, ""},
+ {"break in range else", "{{range .}}{{else}}{{break}}{{end}}", hasError, ""},
+ {"continue in range else", "{{range .}}{{else}}{{continue}}{{end}}", hasError, ""},
+ // Other kinds of assignments and operators aren't available yet.
+ {"bug0a", "{{$x := 0}}{{$x}}", noError, "{{$x := 0}}{{$x}}"},
+ {"bug0b", "{{$x += 1}}{{$x}}", hasError, ""},
+ {"bug0c", "{{$x ! 2}}{{$x}}", hasError, ""},
+ {"bug0d", "{{$x % 3}}{{$x}}", hasError, ""},
+ // Check the parse fails for := rather than comma.
+ {"bug0e", "{{range $x := $y := 3}}{{end}}", hasError, ""},
+ // Another bug: variable read must ignore following punctuation.
+ {"bug1a", "{{$x:=.}}{{$x!2}}", hasError, ""}, // ! is just illegal here.
+ {"bug1b", "{{$x:=.}}{{$x+2}}", hasError, ""}, // $x+2 should not parse as ($x) (+2).
+ {"bug1c", "{{$x:=.}}{{$x +2}}", noError, "{{$x := .}}{{$x +2}}"}, // It's OK with a space.
+ // dot following a literal value
+ {"dot after integer", "{{1.E}}", hasError, ""},
+ {"dot after float", "{{0.1.E}}", hasError, ""},
+ {"dot after boolean", "{{true.E}}", hasError, ""},
+ {"dot after char", "{{'a'.any}}", hasError, ""},
+ {"dot after string", `{{"hello".guys}}`, hasError, ""},
+ {"dot after dot", "{{..E}}", hasError, ""},
+ {"dot after nil", "{{nil.E}}", hasError, ""},
+ // Wrong pipeline
+ {"wrong pipeline dot", "{{12|.}}", hasError, ""},
+ {"wrong pipeline number", "{{.|12|printf}}", hasError, ""},
+ {"wrong pipeline string", "{{.|printf|\"error\"}}", hasError, ""},
+ {"wrong pipeline char", "{{12|printf|'e'}}", hasError, ""},
+ {"wrong pipeline boolean", "{{.|true}}", hasError, ""},
+ {"wrong pipeline nil", "{{'c'|nil}}", hasError, ""},
+ {"empty pipeline", `{{printf "%d" ( ) }}`, hasError, ""},
+ // Missing pipeline in block
+ {"block definition", `{{block "foo"}}hello{{end}}`, hasError, ""},
+}
+
+var builtins = map[string]any{
+ "printf": fmt.Sprintf,
+ "contains": strings.Contains,
+}
+
+func testParse(doCopy bool, t *testing.T) {
+ textFormat = "%q"
+ defer func() { textFormat = "%s" }()
+ for _, test := range parseTests {
+ tmpl, err := New(test.name).Parse(test.input, "", "", make(map[string]*Tree), builtins)
+ switch {
+ case err == nil && !test.ok:
+ t.Errorf("%q: expected error; got none", test.name)
+ continue
+ case err != nil && test.ok:
+ t.Errorf("%q: unexpected error: %v", test.name, err)
+ continue
+ case err != nil && !test.ok:
+ // expected error, got one
+ if *debug {
+ fmt.Printf("%s: %s\n\t%s\n", test.name, test.input, err)
+ }
+ continue
+ }
+ var result string
+ if doCopy {
+ result = tmpl.Root.Copy().String()
+ } else {
+ result = tmpl.Root.String()
+ }
+ if result != test.result {
+ t.Errorf("%s=(%q): got\n\t%v\nexpected\n\t%v", test.name, test.input, result, test.result)
+ }
+ }
+}
+
+func TestParse(t *testing.T) {
+ testParse(false, t)
+}
+
+// Same as TestParse, but we copy the node first
+func TestParseCopy(t *testing.T) {
+ testParse(true, t)
+}
+
+func TestParseWithComments(t *testing.T) {
+ textFormat = "%q"
+ defer func() { textFormat = "%s" }()
+ tests := [...]parseTest{
+ {"comment", "{{/*\n\n\n*/}}", noError, "{{/*\n\n\n*/}}"},
+ {"comment trim left", "x \r\n\t{{- /* hi */}}", noError, `"x"{{/* hi */}}`},
+ {"comment trim right", "{{/* hi */ -}}\n\n\ty", noError, `{{/* hi */}}"y"`},
+ {"comment trim left and right", "x \r\n\t{{- /* */ -}}\n\n\ty", noError, `"x"{{/* */}}"y"`},
+ }
+ for _, test := range tests {
+ t.Run(test.name, func(t *testing.T) {
+ tr := New(test.name)
+ tr.Mode = ParseComments
+ tmpl, err := tr.Parse(test.input, "", "", make(map[string]*Tree))
+ if err != nil {
+ t.Errorf("%q: expected error; got none", test.name)
+ }
+ if result := tmpl.Root.String(); result != test.result {
+ t.Errorf("%s=(%q): got\n\t%v\nexpected\n\t%v", test.name, test.input, result, test.result)
+ }
+ })
+ }
+}
+
+func TestKeywordsAndFuncs(t *testing.T) {
+ // Check collisions between functions and new keywords like 'break'. When a
+ // break function is provided, the parser should treat 'break' as a function,
+ // not a keyword.
+ textFormat = "%q"
+ defer func() { textFormat = "%s" }()
+
+ inp := `{{range .X}}{{break 20}}{{end}}`
+ {
+ // 'break' is a defined function, don't treat it as a keyword: it should
+ // accept an argument successfully.
+ var funcsWithKeywordFunc = map[string]any{
+ "break": func(in any) any { return in },
+ }
+ tmpl, err := New("").Parse(inp, "", "", make(map[string]*Tree), funcsWithKeywordFunc)
+ if err != nil || tmpl == nil {
+ t.Errorf("with break func: unexpected error: %v", err)
+ }
+ }
+
+ {
+ // No function called 'break'; treat it as a keyword. Results in a parse
+ // error.
+ tmpl, err := New("").Parse(inp, "", "", make(map[string]*Tree), make(map[string]any))
+ if err == nil || tmpl != nil {
+ t.Errorf("without break func: expected error; got none")
+ }
+ }
+}
+
+func TestSkipFuncCheck(t *testing.T) {
+ oldTextFormat := textFormat
+ textFormat = "%q"
+ defer func() { textFormat = oldTextFormat }()
+ tr := New("skip func check")
+ tr.Mode = SkipFuncCheck
+ tmpl, err := tr.Parse("{{fn 1 2}}", "", "", make(map[string]*Tree))
+ if err != nil {
+ t.Fatalf("unexpected error: %v", err)
+ }
+ expected := "{{fn 1 2}}"
+ if result := tmpl.Root.String(); result != expected {
+ t.Errorf("got\n\t%v\nexpected\n\t%v", result, expected)
+ }
+}
+
+type isEmptyTest struct {
+ name string
+ input string
+ empty bool
+}
+
+var isEmptyTests = []isEmptyTest{
+ {"empty", ``, true},
+ {"nonempty", `hello`, false},
+ {"spaces only", " \t\n \t\n", true},
+ {"comment only", "{{/* comment */}}", true},
+ {"definition", `{{define "x"}}something{{end}}`, true},
+ {"definitions and space", "{{define `x`}}something{{end}}\n\n{{define `y`}}something{{end}}\n\n", true},
+ {"definitions and text", "{{define `x`}}something{{end}}\nx\n{{define `y`}}something{{end}}\ny\n", false},
+ {"definition and action", "{{define `x`}}something{{end}}{{if 3}}foo{{end}}", false},
+}
+
+func TestIsEmpty(t *testing.T) {
+ if !IsEmptyTree(nil) {
+ t.Errorf("nil tree is not empty")
+ }
+ for _, test := range isEmptyTests {
+ tree, err := New("root").Parse(test.input, "", "", make(map[string]*Tree), nil)
+ if err != nil {
+ t.Errorf("%q: unexpected error: %v", test.name, err)
+ continue
+ }
+ if empty := IsEmptyTree(tree.Root); empty != test.empty {
+ t.Errorf("%q: expected %t got %t", test.name, test.empty, empty)
+ }
+ }
+}
+
+func TestErrorContextWithTreeCopy(t *testing.T) {
+ tree, err := New("root").Parse("{{if true}}{{end}}", "", "", make(map[string]*Tree), nil)
+ if err != nil {
+ t.Fatalf("unexpected tree parse failure: %v", err)
+ }
+ treeCopy := tree.Copy()
+ wantLocation, wantContext := tree.ErrorContext(tree.Root.Nodes[0])
+ gotLocation, gotContext := treeCopy.ErrorContext(treeCopy.Root.Nodes[0])
+ if wantLocation != gotLocation {
+ t.Errorf("wrong error location want %q got %q", wantLocation, gotLocation)
+ }
+ if wantContext != gotContext {
+ t.Errorf("wrong error location want %q got %q", wantContext, gotContext)
+ }
+}
+
+// All failures, and the result is a string that must appear in the error message.
+var errorTests = []parseTest{
+ // Check line numbers are accurate.
+ {"unclosed1",
+ "line1\n{{",
+ hasError, `unclosed1:2: unclosed action`},
+ {"unclosed2",
+ "line1\n{{define `x`}}line2\n{{",
+ hasError, `unclosed2:3: unclosed action`},
+ {"unclosed3",
+ "line1\n{{\"x\"\n\"y\"\n",
+ hasError, `unclosed3:4: unclosed action started at unclosed3:2`},
+ {"unclosed4",
+ "{{\n\n\n\n\n",
+ hasError, `unclosed4:6: unclosed action started at unclosed4:1`},
+ {"var1",
+ "line1\n{{\nx\n}}",
+ hasError, `var1:3: function "x" not defined`},
+ // Specific errors.
+ {"function",
+ "{{foo}}",
+ hasError, `function "foo" not defined`},
+ {"comment1",
+ "{{/*}}",
+ hasError, `comment1:1: unclosed comment`},
+ {"comment2",
+ "{{/*\nhello\n}}",
+ hasError, `comment2:1: unclosed comment`},
+ {"lparen",
+ "{{.X (1 2 3}}",
+ hasError, `unclosed left paren`},
+ {"rparen",
+ "{{.X 1 2 3 ) }}",
+ hasError, "unexpected right paren"},
+ {"rparen2",
+ "{{(.X 1 2 3",
+ hasError, `unclosed action`},
+ {"space",
+ "{{`x`3}}",
+ hasError, `in operand`},
+ {"idchar",
+ "{{a#}}",
+ hasError, `'#'`},
+ {"charconst",
+ "{{'a}}",
+ hasError, `unterminated character constant`},
+ {"stringconst",
+ `{{"a}}`,
+ hasError, `unterminated quoted string`},
+ {"rawstringconst",
+ "{{`a}}",
+ hasError, `unterminated raw quoted string`},
+ {"number",
+ "{{0xi}}",
+ hasError, `number syntax`},
+ {"multidefine",
+ "{{define `a`}}a{{end}}{{define `a`}}b{{end}}",
+ hasError, `multiple definition of template`},
+ {"eof",
+ "{{range .X}}",
+ hasError, `unexpected EOF`},
+ {"variable",
+ // Declare $x so it's defined, to avoid that error, and then check we don't parse a declaration.
+ "{{$x := 23}}{{with $x.y := 3}}{{$x 23}}{{end}}",
+ hasError, `unexpected ":="`},
+ {"multidecl",
+ "{{$a,$b,$c := 23}}",
+ hasError, `too many declarations`},
+ {"undefvar",
+ "{{$a}}",
+ hasError, `undefined variable`},
+ {"wrongdot",
+ "{{true.any}}",
+ hasError, `unexpected . after term`},
+ {"wrongpipeline",
+ "{{12|false}}",
+ hasError, `non executable command in pipeline`},
+ {"emptypipeline",
+ `{{ ( ) }}`,
+ hasError, `missing value for parenthesized pipeline`},
+ {"multilinerawstring",
+ "{{ $v := `\n` }} {{",
+ hasError, `multilinerawstring:2: unclosed action`},
+ {"rangeundefvar",
+ "{{range $k}}{{end}}",
+ hasError, `undefined variable`},
+ {"rangeundefvars",
+ "{{range $k, $v}}{{end}}",
+ hasError, `undefined variable`},
+ {"rangemissingvalue1",
+ "{{range $k,}}{{end}}",
+ hasError, `missing value for range`},
+ {"rangemissingvalue2",
+ "{{range $k, $v := }}{{end}}",
+ hasError, `missing value for range`},
+ {"rangenotvariable1",
+ "{{range $k, .}}{{end}}",
+ hasError, `range can only initialize variables`},
+ {"rangenotvariable2",
+ "{{range $k, 123 := .}}{{end}}",
+ hasError, `range can only initialize variables`},
+}
+
+func TestErrors(t *testing.T) {
+ for _, test := range errorTests {
+ t.Run(test.name, func(t *testing.T) {
+ _, err := New(test.name).Parse(test.input, "", "", make(map[string]*Tree))
+ if err == nil {
+ t.Fatalf("expected error %q, got nil", test.result)
+ }
+ if !strings.Contains(err.Error(), test.result) {
+ t.Fatalf("error %q does not contain %q", err, test.result)
+ }
+ })
+ }
+}
+
+func TestBlock(t *testing.T) {
+ const (
+ input = `a{{block "inner" .}}bar{{.}}baz{{end}}b`
+ outer = `a{{template "inner" .}}b`
+ inner = `bar{{.}}baz`
+ )
+ treeSet := make(map[string]*Tree)
+ tmpl, err := New("outer").Parse(input, "", "", treeSet, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if g, w := tmpl.Root.String(), outer; g != w {
+ t.Errorf("outer template = %q, want %q", g, w)
+ }
+ inTmpl := treeSet["inner"]
+ if inTmpl == nil {
+ t.Fatal("block did not define template")
+ }
+ if g, w := inTmpl.Root.String(), inner; g != w {
+ t.Errorf("inner template = %q, want %q", g, w)
+ }
+}
+
+func TestLineNum(t *testing.T) {
+ // const count = 100
+ const count = 3
+ text := strings.Repeat("{{printf 1234}}\n", count)
+ tree, err := New("bench").Parse(text, "", "", make(map[string]*Tree), builtins)
+ if err != nil {
+ t.Fatal(err)
+ }
+ // Check the line numbers. Each line is an action containing a template, followed by text.
+ // That's two nodes per line.
+ nodes := tree.Root.Nodes
+ for i := 0; i < len(nodes); i += 2 {
+ line := 1 + i/2
+ // Action first.
+ action := nodes[i].(*ActionNode)
+ if action.Line != line {
+ t.Errorf("line %d: action is line %d", line, action.Line)
+ }
+ pipe := action.Pipe
+ if pipe.Line != line {
+ t.Errorf("line %d: pipe is line %d", line, pipe.Line)
+ }
+ }
+}
+
+func BenchmarkParseLarge(b *testing.B) {
+ text := strings.Repeat("{{1234}}\n", 10000)
+ for i := 0; i < b.N; i++ {
+ _, err := New("bench").Parse(text, "", "", make(map[string]*Tree), builtins)
+ if err != nil {
+ b.Fatal(err)
+ }
+ }
+}
+
+var sinkv, sinkl string
+
+func BenchmarkVariableString(b *testing.B) {
+ v := &VariableNode{
+ Ident: []string{"$", "A", "BB", "CCC", "THIS_IS_THE_VARIABLE_BEING_PROCESSED"},
+ }
+ b.ResetTimer()
+ b.ReportAllocs()
+ for i := 0; i < b.N; i++ {
+ sinkv = v.String()
+ }
+ if sinkv == "" {
+ b.Fatal("Benchmark was not run")
+ }
+}
+
+func BenchmarkListString(b *testing.B) {
+ text := `
+{{(printf .Field1.Field2.Field3).Value}}
+{{$x := (printf .Field1.Field2.Field3).Value}}
+{{$y := (printf $x.Field1.Field2.Field3).Value}}
+{{$z := $y.Field1.Field2.Field3}}
+{{if contains $y $z}}
+ {{printf "%q" $y}}
+{{else}}
+ {{printf "%q" $x}}
+{{end}}
+{{with $z.Field1 | contains "boring"}}
+ {{printf "%q" . | printf "%s"}}
+{{else}}
+ {{printf "%d %d %d" 11 11 11}}
+ {{printf "%d %d %s" 22 22 $x.Field1.Field2.Field3 | printf "%s"}}
+ {{printf "%v" (contains $z.Field1.Field2 $y)}}
+{{end}}
+`
+ tree, err := New("bench").Parse(text, "", "", make(map[string]*Tree), builtins)
+ if err != nil {
+ b.Fatal(err)
+ }
+ b.ResetTimer()
+ b.ReportAllocs()
+ for i := 0; i < b.N; i++ {
+ sinkl = tree.Root.String()
+ }
+ if sinkl == "" {
+ b.Fatal("Benchmark was not run")
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-01 17:03:41 +0000