[WIP]Integration tests(DRAFT)

main_test.go

@@ -0,0 +1,160 @@
+package main
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"go/format"
+	"io/fs"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	yaml "gopkg.in/yaml.v3"
+)
+
+const (
+	rootDir      = "testdata"
+	testCaseName = "case.yaml"
+)
+
+func TestIntegration(t *testing.T) {
+	err := filepath.WalkDir(rootDir, func(path string, entry fs.DirEntry, err error) error {
+		if !strings.HasSuffix(path, testCaseName) {
+			return nil
+		}
+
+		scen, err := scenario(path)
+		if err != nil {
+			return err
+		}
+		dir := filepath.Dir(path)
+		t.Run(dir+"|"+scen.Name, func(t *testing.T) {
+			err = scen.run(t, dir)
+			require.NoError(t, err)
+		})
+		return nil
+	})
+	if err != nil {
+		t.Errorf("walk dir error: %s", err)
+		return
+	}
+}
+
+func scenario(path string) (*testCase, error) {
+	fileContent, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	var testScenario testCase
+	err = yaml.Unmarshal(fileContent, &testScenario)
+	if err != nil {
+		return nil, err
+	}
+	return &testScenario, nil
+}
+
+type testCase struct {
+	Name     string  `yaml:"name"`
+	Args     string  `yaml:"args"`
+	IsStdin  bool    `yaml:"is_stdin"`
+	Actual   entries `yaml:"actual"` // required if IsStdin is set
+	Expected entries `yaml:"expected"`
+}
+
+type entry struct {
+	Filename string `yaml:"filename"`
+	Status   int    `yaml:"status"`
+	Content  string `yaml:"content"`
+}
+
+type entries []entry
+
+func (e entries) byFilename(name string) (entry, error) {
+	for _, content := range e {
+		if content.Filename == name {
+			return content, nil
+		}
+	}
+	return entry{}, fmt.Errorf("content not found by filename: %s", name)
+}
+
+func (c *testCase) run(t *testing.T, rootDir string) error {
+	err := c.validate()
+	if err != nil {
+		return err
+	}
+	for _, actual := range c.Actual {
+		file := filepath.Join(rootDir, actual.Filename)
+		err := os.WriteFile(file, []byte(actual.Content), 0o777)
+		if err != nil {
+			return err
+		}
+		params := strings.TrimSpace(c.Args)
+		if !c.IsStdin {
+			params += " " + file
+		}
+		_, exitStatus, err := execByParams(params)
+		if err != nil {
+			_ = os.Remove(file)
+			return err
+		}
+		actualContent, err := os.ReadFile(file)
+		if err != nil {
+			return err
+		}
+		expected, err := c.Expected.byFilename(actual.Filename)
+		if err != nil {
+			return err
+		}
+		expectedContent, err := format.Source([]byte(expected.Content))
+		if err != nil {
+			return err
+		}
+		assert.Equal(t, expected.Status, exitStatus)
+		assert.Equal(t, string(expectedContent), string(actualContent))
+		_ = os.Remove(file)
+	}
+	return nil
+}
+
+func (c *testCase) validate() error {
+	if len(c.Actual) != len(c.Expected) {
+		return fmt.Errorf("file names should match each other")
+	}
+	var isFound bool
+	for _, actual := range c.Actual {
+		for _, expected := range c.Expected {
+			if actual.Filename == expected.Filename {
+				isFound = true
+				break
+			}
+		}
+	}
+	if !isFound {
+		return fmt.Errorf("file names should match each other")
+	}
+	return nil
+}
+
+func execByParams(args string) (string, int, error) {
+	cmd := exec.Command("go", append([]string{"run", "main.go"}, strings.Split(args, " ")...)...)
+	var outBuf, errBuf bytes.Buffer
+	cmd.Stdout = &outBuf
+	cmd.Stderr = &errBuf
+	err := cmd.Start()
+	if err != nil {
+		return "", -1, fmt.Errorf("execution error: %s", err)
+	}
+	if err = cmd.Wait(); err != nil {
+		var exitErr *exec.ExitError
+		if errors.As(err, &exitErr) {
+			return errBuf.String(), exitErr.ExitCode(), nil
+		}
+	}
+	return outBuf.String(), 0, nil
+}

testdata/order/case.yaml

@@ -0,0 +1,42 @@
+name: order test with defaults, blanked and dotted
+args: -format -imports-order project,company,general,std,blanked,dotted
+is_stdin: false
+actual:
+  - filename: file.go
+    content: |
+      package testdata
+
+      import (
+          "log"
+
+          "github.com/incu6us/goimports-reviser/testdata/innderpkg"
+
+          "bytes"
+
+          . "io"
+
+          "golang.org/x/exp/slices"
+
+          _ "fmt"
+      )
+
+      // nolint:gomnd
+
+expected:
+  - filename: file.go
+    content: |
+      package testdata
+
+      import (
+          "github.com/incu6us/goimports-reviser/testdata/innderpkg"
+          "golang.org/x/exp/slices"
+
+          "bytes"
+          "log"
+
+          _ "fmt"
+
+          . "io"
+      )
+
+      // nolint:gomnd

testdata/stdin/case.yaml

@@ -0,0 +1,42 @@
+name: order test with defaults, blanked and dotted
+args: -imports-order project,company,general,std,blanked,dotted
+is_stdin: false
+actual:
+  - filename: file.go
+    content: |
+      package testdata
+
+      import (
+          "log"
+
+          "github.com/incu6us/goimports-reviser/testdata/innderpkg"
+
+          "bytes"
+
+          . "io"
+
+          "golang.org/x/exp/slices"
+
+          _ "fmt"
+      )
+
+      // nolint:gomnd
+
+expected:
+  - filename: file.go
+    content: |
+      package testdata
+
+      import (
+          "github.com/incu6us/goimports-reviser/testdata/innderpkg"
+          "golang.org/x/exp/slices"
+
+          "bytes"
+          "log"
+
+          _ "fmt"
+
+          . "io"
+      )
+
+      // nolint:gomnd