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parser_test.go
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parser_test.go
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package parser
import (
"bufio"
"io/ioutil"
"os"
"os/exec"
"strings"
"testing"
"github.com/stretchr/testify/assert"
)
const (
// Package used by `go test` when calling a single file
pkg = "command-line-arguments"
)
// createScanner create a bufioScanner from the provided test.
// Returns the scanner and the filename for later test.
func createScanner(t *testing.T, s string) (*bufio.Scanner, string) {
// Create the test content
content := "package a"
if len(s) > 0 {
content += "\n" + `import "testing"`
}
content += "\n" + s
tmpfile, err := ioutil.TempFile("", "*_test.go")
assert.NoError(t, err)
defer os.Remove(tmpfile.Name())
defer tmpfile.Close()
_, err = tmpfile.Write([]byte(content))
assert.NoError(t, err)
// Get the file name (not the path) for parsing check
stat, err := tmpfile.Stat()
assert.NoError(t, err)
filename := stat.Name()
// Go test exit with 1 when the tests are not passing, so we can safely ignore this error.
// nolint: gosec
out, _ := exec.Command("go", "test", "-json", "-cover", "-race", tmpfile.Name()).Output()
reader := strings.NewReader(string(out))
return bufio.NewScanner(reader), filename
}
func TestCases(t *testing.T) {
// In the tests, the line will be computed from the top of the file.
// So the line 1 of the first test should be 5.
testCases := []struct {
description string
testFunc string
expected []Test
}{
{
description: "No Test",
testFunc: ``,
expected: []Test{},
},
{
description: "One empty log",
testFunc: `
func Test (t *testing.T) {
t.Log("")
}`,
expected: []Test{},
},
{
description: "One log",
testFunc: `
func Test (t *testing.T) {
t.Log("something")
}`,
expected: []Test{},
},
{
description: "Two logs",
testFunc: `
func Test (t *testing.T) {
t.Log("something")
t.Log("something else")
}`,
expected: []Test{},
},
{
description: "Multiline log",
testFunc: `
func Test (t *testing.T) {
t.Log("something\non\nfour\nlines")
}`,
expected: []Test{},
},
{
description: "One empty fatal",
testFunc: `
func Test (t *testing.T) {
t.Fatal("")
}`,
expected: []Test{{Name: "Test", Line: "5", Output: ""}},
},
{
description: "One fatal",
testFunc: `
func Test (t *testing.T) {
t.Fatal("error")
}`,
expected: []Test{{Name: "Test", Line: "5", Output: "error"}},
},
{
description: "Two fatals",
testFunc: `
func Test (t *testing.T) {
t.Fatal("error")
t.Fatal("again")
}`,
expected: []Test{{Name: "Test", Line: "5", Output: "error"}},
},
{
description: "Multiline fatal",
testFunc: `
func Test (t *testing.T) {
t.Fatal("error\non\nfour\nlines")
}`,
expected: []Test{{Name: "Test", Line: "5", Output: "error\n on\n four\n lines"}},
},
{
description: "Log then fatal",
testFunc: `
func Test (t *testing.T) {
t.Log("ok")
t.Fatal("error")
}`,
expected: []Test{
{Name: "Test", Line: "5", Output: "ok"},
{Name: "Test", Line: "6", Output: "error"},
},
},
{
description: "Log and fatal",
testFunc: `
func TestLog (t *testing.T) {
t.Log("ok")
}
func TestFatal (t *testing.T) {
t.Fatal("error")
}`,
expected: []Test{
{Name: "TestFatal", Line: "9", Output: "error"},
},
},
{
description: "Fatal and fatal",
testFunc: `
func TestFatal1 (t *testing.T) {
t.Fatal("error 1")
}
func TestFatal2 (t *testing.T) {
t.Fatal("error 2")
}`,
expected: []Test{
{Name: "TestFatal1", Line: "5", Output: "error 1"},
{Name: "TestFatal2", Line: "9", Output: "error 2"},
},
},
}
for _, tc := range testCases {
t.Log(tc.description)
s, filename := createScanner(t, tc.testFunc)
tests, err := Parse(s)
assert.NoError(t, err)
assert.Equal(t, len(tc.expected), len(tests))
for i := 0; i < len(tc.expected); i++ {
assert.Equal(t, tc.expected[i].Line, tests[i].Line)
assert.Equal(t, tc.expected[i].Output, tests[i].Output)
assert.Equal(t, filename, tests[i].File)
assert.Equal(t, pkg, tests[i].Package)
}
}
}
func TestNotJSON(t *testing.T) {
reader := strings.NewReader("not JSON")
s := bufio.NewScanner(reader)
tests, err := Parse(s)
assert.Error(t, err)
assert.Empty(t, tests)
}