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platform_build_blueprint/parser/parser_test.go
Colin Cross 96e5670496 Allow parsing Blueprints files without evaluating 
Running bpfmt or bpmodify on a Blueprints file that references
variables defined in a parent Blueprints file causes parse errors
on unknown variables.  Modify the parser to parse in two modes,
parser.Parse and parser.ParseAndEval.  The first parses without
attempting to evaluate variables and expressions, the second
performs a full evaluation.

Change-Id: Ic11948ea77c8e65379d7260591ada15db0e4f5b9
2015-03-20 16:55:32 -07:00

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// Copyright 2014 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package parser
import (
"bytes"
"reflect"
"testing"
"text/scanner"
)
func mkpos(offset, line, column int) scanner.Position {
return scanner.Position{
Offset: offset,
Line: line,
Column: column,
}
}
var validParseTestCases = []struct {
input string
defs []Definition
comments []Comment
}{
{`
foo {}
`,
[]Definition{
&Module{
Type: Ident{"foo", mkpos(3, 2, 3)},
LbracePos: mkpos(7, 2, 7),
RbracePos: mkpos(8, 2, 8),
},
},
nil,
},
{`
foo {
name: "abc",
}
`,
[]Definition{
&Module{
Type: Ident{"foo", mkpos(3, 2, 3)},
LbracePos: mkpos(7, 2, 7),
RbracePos: mkpos(27, 4, 3),
Properties: []*Property{
{
Name: Ident{"name", mkpos(12, 3, 4)},
Pos: mkpos(16, 3, 8),
Value: Value{
Type: String,
Pos: mkpos(18, 3, 10),
StringValue: "abc",
},
},
},
},
},
nil,
},
{`
foo {
isGood: true,
}
`,
[]Definition{
&Module{
Type: Ident{"foo", mkpos(3, 2, 3)},
LbracePos: mkpos(7, 2, 7),
RbracePos: mkpos(28, 4, 3),
Properties: []*Property{
{
Name: Ident{"isGood", mkpos(12, 3, 4)},
Pos: mkpos(18, 3, 10),
Value: Value{
Type: Bool,
Pos: mkpos(20, 3, 12),
BoolValue: true,
},
},
},
},
},
nil,
},
{`
foo {
stuff: ["asdf", "jkl;", "qwert",
"uiop", "bnm,"]
}
`,
[]Definition{
&Module{
Type: Ident{"foo", mkpos(3, 2, 3)},
LbracePos: mkpos(7, 2, 7),
RbracePos: mkpos(67, 5, 3),
Properties: []*Property{
{
Name: Ident{"stuff", mkpos(12, 3, 4)},
Pos: mkpos(17, 3, 9),
Value: Value{
Type: List,
Pos: mkpos(19, 3, 11),
EndPos: mkpos(63, 4, 19),
ListValue: []Value{
Value{
Type: String,
Pos: mkpos(20, 3, 12),
StringValue: "asdf",
},
Value{
Type: String,
Pos: mkpos(28, 3, 20),
StringValue: "jkl;",
},
Value{
Type: String,
Pos: mkpos(36, 3, 28),
StringValue: "qwert",
},
Value{
Type: String,
Pos: mkpos(49, 4, 5),
StringValue: "uiop",
},
Value{
Type: String,
Pos: mkpos(57, 4, 13),
StringValue: "bnm,",
},
},
},
},
},
},
},
nil,
},
{`
foo {
stuff: {
isGood: true,
name: "bar"
}
}
`,
[]Definition{
&Module{
Type: Ident{"foo", mkpos(3, 2, 3)},
LbracePos: mkpos(7, 2, 7),
RbracePos: mkpos(62, 7, 3),
Properties: []*Property{
{
Name: Ident{"stuff", mkpos(12, 3, 4)},
Pos: mkpos(17, 3, 9),
Value: Value{
Type: Map,
Pos: mkpos(19, 3, 11),
EndPos: mkpos(58, 6, 4),
MapValue: []*Property{
{
Name: Ident{"isGood", mkpos(25, 4, 5)},
Pos: mkpos(31, 4, 11),
Value: Value{
Type: Bool,
Pos: mkpos(33, 4, 13),
BoolValue: true,
},
},
{
Name: Ident{"name", mkpos(43, 5, 5)},
Pos: mkpos(47, 5, 9),
Value: Value{
Type: String,
Pos: mkpos(49, 5, 11),
StringValue: "bar",
},
},
},
},
},
},
},
},
nil,
},
{`
// comment1
foo {
// comment2
isGood: true, // comment3
}
`,
[]Definition{
&Module{
Type: Ident{"foo", mkpos(17, 3, 3)},
LbracePos: mkpos(21, 3, 7),
RbracePos: mkpos(70, 6, 3),
Properties: []*Property{
{
Name: Ident{"isGood", mkpos(41, 5, 4)},
Pos: mkpos(47, 5, 10),
Value: Value{
Type: Bool,
Pos: mkpos(49, 5, 12),
BoolValue: true,
},
},
},
},
},
[]Comment{
Comment{
Comment: []string{"// comment1"},
Pos: mkpos(3, 2, 3),
},
Comment{
Comment: []string{"// comment2"},
Pos: mkpos(26, 4, 4),
},
Comment{
Comment: []string{"// comment3"},
Pos: mkpos(56, 5, 19),
},
},
},
{`
foo {
name: "abc",
}
bar {
name: "def",
}
`,
[]Definition{
&Module{
Type: Ident{"foo", mkpos(3, 2, 3)},
LbracePos: mkpos(7, 2, 7),
RbracePos: mkpos(27, 4, 3),
Properties: []*Property{
{
Name: Ident{"name", mkpos(12, 3, 4)},
Pos: mkpos(16, 3, 8),
Value: Value{
Type: String,
Pos: mkpos(18, 3, 10),
StringValue: "abc",
},
},
},
},
&Module{
Type: Ident{"bar", mkpos(32, 6, 3)},
LbracePos: mkpos(36, 6, 7),
RbracePos: mkpos(56, 8, 3),
Properties: []*Property{
{
Name: Ident{"name", mkpos(41, 7, 4)},
Pos: mkpos(45, 7, 8),
Value: Value{
Type: String,
Pos: mkpos(47, 7, 10),
StringValue: "def",
},
},
},
},
},
nil,
},
{`
foo = "stuff"
bar = foo
baz = foo + bar
boo = baz
boo += foo
`,
[]Definition{
&Assignment{
Name: Ident{"foo", mkpos(3, 2, 3)},
Pos: mkpos(7, 2, 7),
Value: Value{
Type: String,
Pos: mkpos(9, 2, 9),
StringValue: "stuff",
},
OrigValue: Value{
Type: String,
Pos: mkpos(9, 2, 9),
StringValue: "stuff",
},
Assigner: "=",
Referenced: true,
},
&Assignment{
Name: Ident{"bar", mkpos(19, 3, 3)},
Pos: mkpos(23, 3, 7),
Value: Value{
Type: String,
Pos: mkpos(25, 3, 9),
StringValue: "stuff",
Variable: "foo",
},
OrigValue: Value{
Type: String,
Pos: mkpos(25, 3, 9),
StringValue: "stuff",
Variable: "foo",
},
Assigner: "=",
Referenced: true,
},
&Assignment{
Name: Ident{"baz", mkpos(31, 4, 3)},
Pos: mkpos(35, 4, 7),
Value: Value{
Type: String,
Pos: mkpos(37, 4, 9),
StringValue: "stuffstuff",
Expression: &Expression{
Args: [2]Value{
{
Type: String,
Pos: mkpos(37, 4, 9),
StringValue: "stuff",
Variable: "foo",
},
{
Type: String,
Pos: mkpos(43, 4, 15),
StringValue: "stuff",
Variable: "bar",
},
},
Operator: '+',
Pos: mkpos(41, 4, 13),
},
},
OrigValue: Value{
Type: String,
Pos: mkpos(37, 4, 9),
StringValue: "stuffstuff",
Expression: &Expression{
Args: [2]Value{
{
Type: String,
Pos: mkpos(37, 4, 9),
StringValue: "stuff",
Variable: "foo",
},
{
Type: String,
Pos: mkpos(43, 4, 15),
StringValue: "stuff",
Variable: "bar",
},
},
Operator: '+',
Pos: mkpos(41, 4, 13),
},
},
Assigner: "=",
Referenced: true,
},
&Assignment{
Name: Ident{"boo", mkpos(49, 5, 3)},
Pos: mkpos(53, 5, 7),
Value: Value{
Type: String,
Pos: mkpos(55, 5, 9),
StringValue: "stuffstuffstuff",
Expression: &Expression{
Args: [2]Value{
{
Type: String,
Pos: mkpos(55, 5, 9),
StringValue: "stuffstuff",
Variable: "baz",
Expression: &Expression{
Args: [2]Value{
{
Type: String,
Pos: mkpos(37, 4, 9),
StringValue: "stuff",
Variable: "foo",
},
{
Type: String,
Pos: mkpos(43, 4, 15),
StringValue: "stuff",
Variable: "bar",
},
},
Operator: '+',
Pos: mkpos(41, 4, 13),
},
},
{
Variable: "foo",
Type: String,
Pos: mkpos(68, 6, 10),
StringValue: "stuff",
},
},
Pos: mkpos(66, 6, 8),
Operator: '+',
},
},
OrigValue: Value{
Type: String,
Pos: mkpos(55, 5, 9),
StringValue: "stuffstuff",
Variable: "baz",
Expression: &Expression{
Args: [2]Value{
{
Type: String,
Pos: mkpos(37, 4, 9),
StringValue: "stuff",
Variable: "foo",
},
{
Type: String,
Pos: mkpos(43, 4, 15),
StringValue: "stuff",
Variable: "bar",
},
},
Operator: '+',
Pos: mkpos(41, 4, 13),
},
},
Assigner: "=",
},
&Assignment{
Name: Ident{"boo", mkpos(61, 6, 3)},
Pos: mkpos(66, 6, 8),
Value: Value{
Type: String,
Pos: mkpos(68, 6, 10),
StringValue: "stuff",
Variable: "foo",
},
OrigValue: Value{
Type: String,
Pos: mkpos(68, 6, 10),
StringValue: "stuff",
Variable: "foo",
},
Assigner: "+=",
},
},
nil,
},
}
func TestParseValidInput(t *testing.T) {
for _, testCase := range validParseTestCases {
r := bytes.NewBufferString(testCase.input)
file, errs := ParseAndEval("", r, NewScope(nil))
if len(errs) != 0 {
t.Errorf("test case: %s", testCase.input)
t.Errorf("unexpected errors:")
for _, err := range errs {
t.Errorf(" %s", err)
}
t.FailNow()
}
if len(file.Defs) == len(testCase.defs) {
for i := range file.Defs {
if !reflect.DeepEqual(file.Defs[i], testCase.defs[i]) {
t.Errorf("test case: %s", testCase.input)
t.Errorf("incorrect defintion %d:", i)
t.Errorf(" expected: %s", testCase.defs[i])
t.Errorf(" got: %s", file.Defs[i])
}
}
} else {
t.Errorf("test case: %s", testCase.input)
t.Errorf("length mismatch, expected %d definitions, got %d",
len(testCase.defs), len(file.Defs))
}
if len(file.Comments) == len(testCase.comments) {
for i := range file.Comments {
if !reflect.DeepEqual(file.Comments, testCase.comments) {
t.Errorf("test case: %s", testCase.input)
t.Errorf("incorrect comment %d:", i)
t.Errorf(" expected: %s", testCase.comments[i])
t.Errorf(" got: %s", file.Comments[i])
}
}
} else {
t.Errorf("test case: %s", testCase.input)
t.Errorf("length mismatch, expected %d comments, got %d",
len(testCase.comments), len(file.Comments))
}
}
}
// TODO: Test error strings
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