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package gopter
import (
"fmt"
"io"
"os"
"strings"
"unicode"
)
const newLine = "\n"
// FormatedReporter reports test results in a human readable manager.
type FormatedReporter struct {
verbose bool
width int
output io.Writer
}
// NewFormatedReporter create a new formated reporter
// verbose toggles verbose output of the property results
// width is the maximal width per line
// output is the writer were the report will be written to
func NewFormatedReporter(verbose bool, width int, output io.Writer) Reporter {
return &FormatedReporter{
verbose: verbose,
width: width,
output: output,
}
}
// ConsoleReporter creates a FormatedReporter writing to the console (i.e. stdout)
func ConsoleReporter(verbose bool) Reporter {
return NewFormatedReporter(verbose, 75, os.Stdout)
}
// ReportTestResult reports a single property result
func (r *FormatedReporter) ReportTestResult(propName string, result *TestResult) {
if result.Passed() {
fmt.Fprintln(r.output, r.formatLines(fmt.Sprintf("+ %s: %s", propName, r.reportResult(result)), "", ""))
} else {
fmt.Fprintln(r.output, r.formatLines(fmt.Sprintf("! %s: %s", propName, r.reportResult(result)), "", ""))
}
}
func (r *FormatedReporter) reportResult(result *TestResult) string {
status := ""
switch result.Status {
case TestProved:
status = "OK, proved property.\n" + r.reportPropArgs(result.Args)
case TestPassed:
status = fmt.Sprintf("OK, passed %d tests.", result.Succeeded)
case TestFailed:
status = fmt.Sprintf("Falsified after %d passed tests.\n%s%s", result.Succeeded, r.reportLabels(result.Labels), r.reportPropArgs(result.Args))
case TestExhausted:
status = fmt.Sprintf("Gave up after only %d passed tests. %d tests were discarded.", result.Succeeded, result.Discarded)
case TestError:
if r.verbose {
status = fmt.Sprintf("Error on property evaluation after %d passed tests: %s\n%s\n%s", result.Succeeded, result.Error.Error(), result.ErrorStack, r.reportPropArgs(result.Args))
} else {
status = fmt.Sprintf("Error on property evaluation after %d passed tests: %s\n%s", result.Succeeded, result.Error.Error(), r.reportPropArgs(result.Args))
}
}
if r.verbose {
return concatLines(status, fmt.Sprintf("Elapsed time: %s", result.Time.String()))
}
return status
}
func (r *FormatedReporter) reportLabels(labels []string) string {
if labels != nil && len(labels) > 0 {
return fmt.Sprintf("> Labels of failing property: %s\n", strings.Join(labels, newLine))
}
return ""
}
func (r *FormatedReporter) reportPropArgs(p PropArgs) string {
result := ""
for i, arg := range p {
if result != "" {
result += newLine
}
result += r.reportPropArg(i, arg)
}
return result
}
func (r *FormatedReporter) reportPropArg(idx int, propArg *PropArg) string {
label := propArg.Label
if label == "" {
label = fmt.Sprintf("ARG_%d", idx)
}
result := fmt.Sprintf("%s: %s", label, propArg.ArgFormatted)
if propArg.Shrinks > 0 {
result += fmt.Sprintf("\n%s_ORIGINAL (%d shrinks): %s", label, propArg.Shrinks, propArg.OrigArgFormatted)
}
return result
}
func (r *FormatedReporter) formatLines(str, lead, trail string) string {
result := ""
for _, line := range strings.Split(str, "\n") {
if result != "" {
result += newLine
}
result += r.breakLine(lead+line+trail, " ")
}
return result
}
func (r *FormatedReporter) breakLine(str, lead string) string {
if len(str) <= r.width {
return str
}
result := ""
for len(str) > r.width {
idx := strings.LastIndexFunc(str[0:r.width], func(ch rune) bool {
return unicode.IsSpace(ch)
})
if idx <= 0 {
idx = r.width
}
result += str[0:idx] + "\n" + lead
str = str[idx:]
}
result += str
return result
}
func concatLines(strs ...string) string {
result := ""
for _, str := range strs {
if str != "" {
if result != "" {
result += "\n"
}
result += str
}
}
return result
}
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