integration_test.go

package integration_test

import (
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"testing"
)

func TestSyntaxErrorDetection(t *testing.T) {
	cmd := exec.Command("go", "run", "./cmd/gocheck/", "testdata/syntax/invalid.py")
	out, err := cmd.CombinedOutput()
	if err == nil {
		t.Error("expected non-zero exit for syntax errors")
	}
	if !strings.Contains(string(out), "invalid.py") {
		t.Errorf("output should reference file: %s", out)
	}
}

func TestLintDiffMode(t *testing.T) {
	cmd := exec.Command("go", "run", "./cmd/gocheck/", "testdata/lint/trailing.py")
	out, err := cmd.CombinedOutput()
	if err == nil {
		t.Error("expected non-zero exit for lint issues")
	}
	if !strings.Contains(string(out), "trailing-whitespace") {
		t.Errorf("expected trailing-whitespace in output: %s", out)
	}
}

func TestLintFixMode(t *testing.T) {
	src, _ := os.ReadFile("testdata/lint/trailing.py")
	tmp := filepath.Join(t.TempDir(), "test.py")
	os.WriteFile(tmp, src, 0644)

	cmd := exec.Command("go", "run", "./cmd/gocheck/", "--fix", tmp)
	output, err := cmd.CombinedOutput()
	if err != nil {
		t.Fatalf("fix mode failed: %v\noutput: %s", err, output)
	}

	result, _ := os.ReadFile(tmp)
	expected, _ := os.ReadFile("testdata/lint/trailing.py.fixed")
	if string(result) != string(expected) {
		t.Errorf("fixed output doesn't match expected:\ngot:\n%q\nwant:\n%q", result, expected)
	}
}

func TestCleanFileExitZero(t *testing.T) {
	tmp := filepath.Join(t.TempDir(), "clean.py")
	os.WriteFile(tmp, []byte("x = 1\n"), 0644)

	cmd := exec.Command("go", "run", "./cmd/gocheck/", tmp)
	err := cmd.Run()
	if err != nil {
		t.Errorf("expected exit 0 for clean file, got: %v", err)
	}
}