mirror of https://github.com/golang/go.git
289 lines
10 KiB
Go
289 lines
10 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package parse
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import (
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"flag"
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"fmt"
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"testing"
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)
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var debug = flag.Bool("debug", false, "show the errors produced by the tests")
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type numberTest struct {
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text string
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isInt bool
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isUint bool
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isFloat bool
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isComplex bool
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int64
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uint64
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float64
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complex128
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}
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var numberTests = []numberTest{
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// basics
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{"0", true, true, true, false, 0, 0, 0, 0},
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{"-0", true, true, true, false, 0, 0, 0, 0}, // check that -0 is a uint.
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{"73", true, true, true, false, 73, 73, 73, 0},
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{"073", true, true, true, false, 073, 073, 073, 0},
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{"0x73", true, true, true, false, 0x73, 0x73, 0x73, 0},
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{"-73", true, false, true, false, -73, 0, -73, 0},
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{"+73", true, false, true, false, 73, 0, 73, 0},
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{"100", true, true, true, false, 100, 100, 100, 0},
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{"1e9", true, true, true, false, 1e9, 1e9, 1e9, 0},
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{"-1e9", true, false, true, false, -1e9, 0, -1e9, 0},
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{"-1.2", false, false, true, false, 0, 0, -1.2, 0},
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{"1e19", false, true, true, false, 0, 1e19, 1e19, 0},
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{"-1e19", false, false, true, false, 0, 0, -1e19, 0},
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{"4i", false, false, false, true, 0, 0, 0, 4i},
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{"-1.2+4.2i", false, false, false, true, 0, 0, 0, -1.2 + 4.2i},
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{"073i", false, false, false, true, 0, 0, 0, 73i}, // not octal!
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// complex with 0 imaginary are float (and maybe integer)
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{"0i", true, true, true, true, 0, 0, 0, 0},
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{"-1.2+0i", false, false, true, true, 0, 0, -1.2, -1.2},
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{"-12+0i", true, false, true, true, -12, 0, -12, -12},
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{"13+0i", true, true, true, true, 13, 13, 13, 13},
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// funny bases
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{"0123", true, true, true, false, 0123, 0123, 0123, 0},
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{"-0x0", true, true, true, false, 0, 0, 0, 0},
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{"0xdeadbeef", true, true, true, false, 0xdeadbeef, 0xdeadbeef, 0xdeadbeef, 0},
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// character constants
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{`'a'`, true, true, true, false, 'a', 'a', 'a', 0},
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{`'\n'`, true, true, true, false, '\n', '\n', '\n', 0},
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{`'\\'`, true, true, true, false, '\\', '\\', '\\', 0},
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{`'\''`, true, true, true, false, '\'', '\'', '\'', 0},
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{`'\xFF'`, true, true, true, false, 0xFF, 0xFF, 0xFF, 0},
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{`'パ'`, true, true, true, false, 0x30d1, 0x30d1, 0x30d1, 0},
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{`'\u30d1'`, true, true, true, false, 0x30d1, 0x30d1, 0x30d1, 0},
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{`'\U000030d1'`, true, true, true, false, 0x30d1, 0x30d1, 0x30d1, 0},
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// some broken syntax
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{text: "+-2"},
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{text: "0x123."},
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{text: "1e."},
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{text: "0xi."},
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{text: "1+2."},
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{text: "'x"},
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{text: "'xx'"},
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}
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func TestNumberParse(t *testing.T) {
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for _, test := range numberTests {
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// If fmt.Sscan thinks it's complex, it's complex. We can't trust the output
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// because imaginary comes out as a number.
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var c complex128
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typ := itemNumber
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if test.text[0] == '\'' {
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typ = itemCharConstant
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} else {
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_, err := fmt.Sscan(test.text, &c)
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if err == nil {
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typ = itemComplex
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}
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}
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n, err := newNumber(test.text, typ)
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ok := test.isInt || test.isUint || test.isFloat || test.isComplex
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if ok && err != nil {
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t.Errorf("unexpected error for %q: %s", test.text, err)
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continue
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}
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if !ok && err == nil {
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t.Errorf("expected error for %q", test.text)
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continue
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}
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if !ok {
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if *debug {
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fmt.Printf("%s\n\t%s\n", test.text, err)
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}
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continue
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}
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if n.IsComplex != test.isComplex {
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t.Errorf("complex incorrect for %q; should be %t", test.text, test.isComplex)
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}
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if test.isInt {
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if !n.IsInt {
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t.Errorf("expected integer for %q", test.text)
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}
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if n.Int64 != test.int64 {
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t.Errorf("int64 for %q should be %d Is %d", test.text, test.int64, n.Int64)
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}
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} else if n.IsInt {
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t.Errorf("did not expect integer for %q", test.text)
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}
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if test.isUint {
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if !n.IsUint {
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t.Errorf("expected unsigned integer for %q", test.text)
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}
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if n.Uint64 != test.uint64 {
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t.Errorf("uint64 for %q should be %d Is %d", test.text, test.uint64, n.Uint64)
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}
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} else if n.IsUint {
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t.Errorf("did not expect unsigned integer for %q", test.text)
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}
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if test.isFloat {
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if !n.IsFloat {
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t.Errorf("expected float for %q", test.text)
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}
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if n.Float64 != test.float64 {
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t.Errorf("float64 for %q should be %g Is %g", test.text, test.float64, n.Float64)
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}
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} else if n.IsFloat {
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t.Errorf("did not expect float for %q", test.text)
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}
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if test.isComplex {
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if !n.IsComplex {
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t.Errorf("expected complex for %q", test.text)
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}
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if n.Complex128 != test.complex128 {
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t.Errorf("complex128 for %q should be %g Is %g", test.text, test.complex128, n.Complex128)
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}
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} else if n.IsComplex {
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t.Errorf("did not expect complex for %q", test.text)
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}
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}
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}
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type parseTest struct {
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name string
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input string
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ok bool
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result string
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}
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const (
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noError = true
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hasError = false
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)
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var parseTests = []parseTest{
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{"empty", "", noError,
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`[]`},
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{"comment", "{{/*\n\n\n*/}}", noError,
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`[]`},
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{"spaces", " \t\n", noError,
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`[(text: " \t\n")]`},
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{"text", "some text", noError,
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`[(text: "some text")]`},
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{"emptyAction", "{{}}", hasError,
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`[(action: [])]`},
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{"field", "{{.X}}", noError,
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`[(action: [(command: [F=[X]])])]`},
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{"simple command", "{{printf}}", noError,
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`[(action: [(command: [I=printf])])]`},
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{"$ invocation", "{{$}}", noError,
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"[(action: [(command: [V=[$]])])]"},
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{"variable invocation", "{{with $x := 3}}{{$x 23}}{{end}}", noError,
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"[({{with [V=[$x]] := [(command: [N=3])]}} [(action: [(command: [V=[$x] N=23])])])]"},
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{"variable with fields", "{{$.I}}", noError,
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"[(action: [(command: [V=[$ I]])])]"},
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{"multi-word command", "{{printf `%d` 23}}", noError,
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"[(action: [(command: [I=printf S=`%d` N=23])])]"},
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{"pipeline", "{{.X|.Y}}", noError,
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`[(action: [(command: [F=[X]]) (command: [F=[Y]])])]`},
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{"pipeline with decl", "{{$x := .X|.Y}}", noError,
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`[(action: [V=[$x]] := [(command: [F=[X]]) (command: [F=[Y]])])]`},
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{"declaration", "{{.X|.Y}}", noError,
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`[(action: [(command: [F=[X]]) (command: [F=[Y]])])]`},
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{"simple if", "{{if .X}}hello{{end}}", noError,
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`[({{if [(command: [F=[X]])]}} [(text: "hello")])]`},
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{"if with else", "{{if .X}}true{{else}}false{{end}}", noError,
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`[({{if [(command: [F=[X]])]}} [(text: "true")] {{else}} [(text: "false")])]`},
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{"simple range", "{{range .X}}hello{{end}}", noError,
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`[({{range [(command: [F=[X]])]}} [(text: "hello")])]`},
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{"chained field range", "{{range .X.Y.Z}}hello{{end}}", noError,
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`[({{range [(command: [F=[X Y Z]])]}} [(text: "hello")])]`},
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{"nested range", "{{range .X}}hello{{range .Y}}goodbye{{end}}{{end}}", noError,
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`[({{range [(command: [F=[X]])]}} [(text: "hello")({{range [(command: [F=[Y]])]}} [(text: "goodbye")])])]`},
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{"range with else", "{{range .X}}true{{else}}false{{end}}", noError,
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`[({{range [(command: [F=[X]])]}} [(text: "true")] {{else}} [(text: "false")])]`},
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{"range over pipeline", "{{range .X|.M}}true{{else}}false{{end}}", noError,
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`[({{range [(command: [F=[X]]) (command: [F=[M]])]}} [(text: "true")] {{else}} [(text: "false")])]`},
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{"range []int", "{{range .SI}}{{.}}{{end}}", noError,
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`[({{range [(command: [F=[SI]])]}} [(action: [(command: [{{<.>}}])])])]`},
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{"constants", "{{range .SI 1 -3.2i true false 'a'}}{{end}}", noError,
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`[({{range [(command: [F=[SI] N=1 N=-3.2i B=true B=false N='a'])]}} [])]`},
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{"template", "{{template `x`}}", noError,
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`[{{template "x"}}]`},
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{"template with arg", "{{template `x` .Y}}", noError,
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`[{{template "x" [(command: [F=[Y]])]}}]`},
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{"with", "{{with .X}}hello{{end}}", noError,
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`[({{with [(command: [F=[X]])]}} [(text: "hello")])]`},
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{"with with else", "{{with .X}}hello{{else}}goodbye{{end}}", noError,
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`[({{with [(command: [F=[X]])]}} [(text: "hello")] {{else}} [(text: "goodbye")])]`},
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// Errors.
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{"unclosed action", "hello{{range", hasError, ""},
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{"unmatched end", "{{end}}", hasError, ""},
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{"missing end", "hello{{range .x}}", hasError, ""},
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{"missing end after else", "hello{{range .x}}{{else}}", hasError, ""},
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{"undefined function", "hello{{undefined}}", hasError, ""},
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{"undefined variable", "{{$x}}", hasError, ""},
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{"variable undefined after end", "{{with $x := 4}}{{end}}{{$x}}", hasError, ""},
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{"variable undefined in template", "{{template $v}}", hasError, ""},
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{"declare with field", "{{with $x.Y := 4}}{{end}}", hasError, ""},
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{"template with field ref", "{{template .X}}", hasError, ""},
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{"template with var", "{{template $v}}", hasError, ""},
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{"invalid punctuation", "{{printf 3, 4}}", hasError, ""},
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{"multidecl outside range", "{{with $v, $u := 3}}{{end}}", hasError, ""},
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{"too many decls in range", "{{range $u, $v, $w := 3}}{{end}}", hasError, ""},
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}
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var builtins = map[string]interface{}{
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"printf": fmt.Sprintf,
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}
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func TestParse(t *testing.T) {
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for _, test := range parseTests {
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tmpl, err := New(test.name).Parse(test.input, "", "", make(map[string]*Tree), builtins)
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switch {
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case err == nil && !test.ok:
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t.Errorf("%q: expected error; got none", test.name)
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continue
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case err != nil && test.ok:
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t.Errorf("%q: unexpected error: %v", test.name, err)
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continue
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case err != nil && !test.ok:
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// expected error, got one
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if *debug {
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fmt.Printf("%s: %s\n\t%s\n", test.name, test.input, err)
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}
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continue
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}
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result := tmpl.Root.String()
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if result != test.result {
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t.Errorf("%s=(%q): got\n\t%v\nexpected\n\t%v", test.name, test.input, result, test.result)
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}
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}
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}
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type isEmptyTest struct {
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name string
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input string
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empty bool
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}
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var isEmptyTests = []isEmptyTest{
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{"empty", ``, true},
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{"nonempty", `hello`, false},
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{"spaces only", " \t\n \t\n", true},
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{"definition", `{{define "x"}}something{{end}}`, true},
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{"definitions and space", "{{define `x`}}something{{end}}\n\n{{define `y`}}something{{end}}\n\n", true},
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{"definitions and text", "{{define `x`}}something{{end}}\nx\n{{define `y`}}something{{end}}\ny\n}}", false},
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{"definition and action", "{{define `x`}}something{{end}}{{if 3}}foo{{end}}", false},
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}
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func TestIsEmpty(t *testing.T) {
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for _, test := range isEmptyTests {
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tree, err := New("root").Parse(test.input, "", "", make(map[string]*Tree), nil)
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if err != nil {
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t.Errorf("%q: unexpected error: %v", test.name, err)
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continue
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}
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if empty := IsEmptyTree(tree.Root); empty != test.empty {
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t.Errorf("%q: expected %t got %t", test.name, test.empty, empty)
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}
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}
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}
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