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package pterm_test
import (
"bytes"
"fmt"
"io"
"os"
"testing"
"github.com/MarvinJWendt/testza"
"github.com/pterm/pterm"
)
var printables = []interface{}{"Hello, World!", 1337, true, false, -1337, 'c', 1.5, "\\", "%s"}
var terminalWidth = 80
var terminalHeight = 60
func TestMain(m *testing.M) {
pterm.SetForcedTerminalSize(terminalWidth, terminalHeight)
setupStdoutCapture()
exitVal := m.Run()
teardownStdoutCapture()
os.Exit(exitVal)
}
// testPrintContains can be used to test Print methods.
func testPrintContains(t *testing.T, logic func(w io.Writer, a interface{})) {
t.Helper()
for _, printable := range printables {
t.Run(fmt.Sprint(printable), func(t *testing.T) {
s := captureStdout(func(w io.Writer) {
logic(w, printable)
})
testza.AssertContains(t, s, fmt.Sprint(printable))
})
pterm.DisableStyling()
t.Run(fmt.Sprint(printable), func(t *testing.T) {
s := captureStdout(func(w io.Writer) {
logic(w, printable)
})
testza.AssertContains(t, s, fmt.Sprint(printable))
})
pterm.EnableStyling()
}
}
// testPrintfContains can be used to test Printf methods.
func testPrintfContains(t *testing.T, logic func(w io.Writer, format string, a interface{})) {
for _, printable := range printables {
t.Run(fmt.Sprint(printable), func(t *testing.T) {
s := captureStdout(func(w io.Writer) {
logic(w, "Hello, %v!", printable)
})
testza.AssertContains(t, s, fmt.Sprintf("Hello, %v!", fmt.Sprint(printable)))
})
pterm.DisableStyling()
t.Run(fmt.Sprint(printable), func(t *testing.T) {
s := captureStdout(func(w io.Writer) {
logic(w, "Hello, %v!", printable)
})
testza.AssertContains(t, s, fmt.Sprintf("Hello, %v!", fmt.Sprint(printable)))
})
pterm.EnableStyling()
}
}
// testPrintflnContains can be used to test Printfln methods.
func testPrintflnContains(t *testing.T, logic func(w io.Writer, format string, a interface{})) {
for _, printable := range printables {
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testPrintfContains(t, logic)
})
pterm.DisableStyling()
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testPrintfContains(t, logic)
})
pterm.EnableStyling()
}
}
// testPrintlnContains can be used to test Println methods.
func testPrintlnContains(t *testing.T, logic func(w io.Writer, a interface{})) {
for _, printable := range printables {
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testPrintContains(t, logic)
})
pterm.DisableStyling()
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testPrintContains(t, logic)
})
pterm.EnableStyling()
}
}
// testSprintContains can be used to test Sprint methods.
func testSprintContains(t *testing.T, logic func(a interface{}) string) {
for _, printable := range printables {
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testza.AssertContains(t, logic(printable), fmt.Sprint(printable))
})
pterm.DisableStyling()
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testza.AssertContains(t, logic(printable), fmt.Sprint(printable))
})
pterm.EnableStyling()
}
}
// testSprintContainsWithoutError can be used to test Sprint methods which return an error.
func testSprintContainsWithoutError(t *testing.T, logic func(a interface{}) (string, error)) {
for _, printable := range printables {
t.Run(fmt.Sprint(printable), func(t *testing.T) {
s, err := logic(printable)
testza.AssertContains(t, s, fmt.Sprint(printable))
testza.AssertNoError(t, err)
})
pterm.DisableStyling()
t.Run(fmt.Sprint(printable), func(t *testing.T) {
s, err := logic(printable)
testza.AssertContains(t, s, fmt.Sprint(printable))
testza.AssertNoError(t, err)
})
pterm.EnableStyling()
}
}
// testSprintfContains can be used to test Sprintf methods.
func testSprintfContains(t *testing.T, logic func(format string, a interface{}) string) {
for _, printable := range printables {
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testza.AssertContains(t, logic("Hello, %v!", printable), fmt.Sprintf("Hello, %v!", printable))
})
pterm.DisableStyling()
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testza.AssertContains(t, logic("Hello, %v!", printable), fmt.Sprintf("Hello, %v!", printable))
})
pterm.EnableStyling()
}
}
// testSprintflnContains can be used to test Sprintfln methods.
func testSprintflnContains(t *testing.T, logic func(format string, a interface{}) string) {
for _, printable := range printables {
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testSprintfContains(t, logic)
})
pterm.DisableStyling()
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testSprintfContains(t, logic)
})
pterm.EnableStyling()
}
}
// testSprintlnContains can be used to test Sprintln methods.
func testSprintlnContains(t *testing.T, logic func(a interface{}) string) {
for _, printable := range printables {
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testSprintContains(t, logic)
})
pterm.DisableStyling()
t.Run(fmt.Sprint(printable), func(t *testing.T) {
testSprintContains(t, logic)
})
pterm.EnableStyling()
}
}
// testDoesOutput can be used to test if something is outputted to stdout.
func testDoesOutput(t *testing.T, logic func(w io.Writer)) {
testza.AssertNotZero(t, captureStdout(logic))
pterm.DisableStyling()
testza.AssertNotZero(t, captureStdout(logic))
pterm.EnableStyling()
}
// testEmpty checks that a function does not return a string.
func testEmpty(t *testing.T, logic func(a interface{}) string) {
for _, printable := range printables {
testza.AssertZero(t, logic(printable))
pterm.DisableStyling()
testza.AssertZero(t, logic(printable))
pterm.EnableStyling()
}
}
// testDoesNotOutput can be used, to test that something does not output anything to stdout.
func testDoesNotOutput(t *testing.T, logic func(w io.Writer)) {
testza.AssertZero(t, captureStdout(logic))
pterm.DisableStyling()
testza.AssertZero(t, captureStdout(logic))
pterm.EnableStyling()
}
var outBuf bytes.Buffer
// setupStdoutCapture sets up a fake stdout capture.
func setupStdoutCapture() {
outBuf.Reset()
pterm.SetDefaultOutput(&outBuf)
}
// teardownStdoutCapture restores the real stdout.
func teardownStdoutCapture() {
pterm.SetDefaultOutput(os.Stdout)
}
// captureStdout simulates capturing of os.stdout with a buffer and returns what was writted to the screen
func captureStdout(f func(w io.Writer)) string {
setupStdoutCapture()
f(&outBuf)
return readStdout()
}
// readStdout reads the current stdout buffor. Assumes setupStdoutCapture() has been called before.
func readStdout() string {
content := outBuf.String()
outBuf.Reset()
return content
}
func proxyToDevNull() {
pterm.SetDefaultOutput(os.NewFile(0, os.DevNull))
}
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