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parser.go
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/
parser.go
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// Copyright 2019 The New York Times Company
//
// 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 internal
import (
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"github.com/drone/envsubst"
"gopkg.in/yaml.v2"
)
// TestFile is a single test definition file
type TestFile struct {
Tests []*Test `yaml:"tests"`
}
// Test is a single test
type Test struct {
Filename string
Description string
Conditions struct {
Env map[string]string `yaml:"env"`
} `yaml:"conditions"`
SkipCertVerification bool `yaml:"skipCertVerification"`
Request struct {
Scheme string `yaml:"scheme"`
Host string `yaml:"host"`
Method string `yaml:"method"`
Path string `yaml:"path"`
Headers map[string]string `yaml:"headers"`
DynamicHeaders []DynamicHeader `yaml:"dynamicHeaders"`
Body string `yaml:"body"`
} `yaml:"request"`
Response struct {
StatusCodes []int `yaml:"statusCodes"`
Headers struct {
Patterns map[string]string `yaml:"patterns"`
NotPresent []string `yaml:"notPresent"`
NotMatching map[string]string `yaml:"notMatching"`
IfPresentNotMatching map[string]string `yaml:"ifPresentNotMatching"`
} `yaml:"headers"`
Body struct {
Patterns []string `yaml:"patterns"`
}
} `yaml:"response"`
}
type DynamicHeader struct {
Name string `yaml:"name"`
Function string `yaml:"function"`
Args []string `yaml:"args,omitempty"`
}
// ParseAllTestsInDirectory recursively parses all test definition files in a given directory
func ParseAllTestsInDirectory(root string) ([]*Test, error) {
files := []string{}
var dirWalkError error
filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
if err != nil {
fmt.Printf("error: %s\n", err)
dirWalkError = err
return nil
}
// Skip directories
if info.IsDir() {
return nil
}
// Skip symlinks
if info.Mode()&os.ModeSymlink != 0 {
return nil
}
files = append(files, path)
return nil
})
if dirWalkError != nil {
return nil, dirWalkError
}
allTests := []*Test{}
for _, p := range files {
tests, err := parseTestFile(p)
if err != nil {
return nil, err
}
allTests = append(allTests, tests...)
}
return allTests, nil
}
func parseTestFile(filePath string) ([]*Test, error) {
// Read file into buffer
data, err := ioutil.ReadFile(filePath)
if err != nil {
return nil, fmt.Errorf("ioutil: %v", err)
}
// Environment variable substitution
yamlString, err := envsubst.EvalEnv(string(data))
if err != nil {
return nil, fmt.Errorf("unable to parse file %s: %v", filePath, err)
}
// Parse as YAML
tf := TestFile{}
err = yaml.Unmarshal([]byte(yamlString), &tf)
if err != nil {
return nil, fmt.Errorf("unable to parse file %s: %v", filePath, err)
}
// Add file path to tests
fileName := path.Base(filePath)
for _, test := range tf.Tests {
test.Filename = fileName
}
return tf.Tests, nil
}