phase5: cli subcommand with file/stdin input and output options

2026-04-18 12:16:58 +03:00
parent 3b947e278c
commit 6aa19fe12a
3 changed files with 306 additions and 13 deletions
@@ -0,0 +1,124 @@
+package cli
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestCLIFileToFile(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	inputPath := filepath.Join(dir, "example.md")
+	if err := os.WriteFile(inputPath, []byte("# Hello\n\nBody"), 0o644); err != nil {
+		t.Fatalf("write input: %v", err)
+	}
+
+	var stdout, stderr bytes.Buffer
+	if err := Run(context.Background(), []string{inputPath}, strings.NewReader(""), &stdout, &stderr); err != nil {
+		t.Fatalf("run: %v", err)
+	}
+
+	outputPath := filepath.Join(dir, "example.html")
+	got, err := os.ReadFile(outputPath)
+	if err != nil {
+		t.Fatalf("read output: %v", err)
+	}
+	if !bytes.Contains(got, []byte("<!DOCTYPE html>")) {
+		t.Fatalf("output missing doctype: %s", got)
+	}
+	if stdout.Len() != 0 {
+		t.Fatalf("stdout = %q, want empty", stdout.String())
+	}
+	if stderr.Len() != 0 {
+		t.Fatalf("stderr = %q, want empty", stderr.String())
+	}
+}
+
+func TestCLIStdin(t *testing.T) {
+	t.Parallel()
+
+	stdin := strings.NewReader("# Привет\n\nТекст")
+	var stdout, stderr bytes.Buffer
+
+	if err := Run(context.Background(), []string{"--stdin"}, stdin, &stdout, &stderr); err != nil {
+		t.Fatalf("run: %v", err)
+	}
+
+	if !strings.Contains(stdout.String(), "<!DOCTYPE html>") {
+		t.Fatalf("stdout missing doctype: %s", stdout.String())
+	}
+	if stderr.Len() != 0 {
+		t.Fatalf("stderr = %q, want empty", stderr.String())
+	}
+}
+
+func TestCLIOutputFlag(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	inputPath := filepath.Join(dir, "example.md")
+	outputPath := filepath.Join(dir, "custom.html")
+	if err := os.WriteFile(inputPath, []byte("Plain text"), 0o644); err != nil {
+		t.Fatalf("write input: %v", err)
+	}
+
+	var stdout, stderr bytes.Buffer
+	if err := Run(context.Background(), []string{inputPath, "-o", outputPath}, strings.NewReader(""), &stdout, &stderr); err != nil {
+		t.Fatalf("run: %v", err)
+	}
+
+	if _, err := os.Stat(outputPath); err != nil {
+		t.Fatalf("stat output: %v", err)
+	}
+}
+
+func TestCLITitle(t *testing.T) {
+	t.Parallel()
+
+	var stdout, stderr bytes.Buffer
+	if err := Run(context.Background(), []string{"--stdin", "--title", "Custom"}, strings.NewReader(""), &stdout, &stderr); err != nil {
+		t.Fatalf("run: %v", err)
+	}
+
+	if !strings.Contains(stdout.String(), "<title>Custom</title>") {
+		t.Fatalf("stdout missing title: %s", stdout.String())
+	}
+}
+
+func TestCLINoInput(t *testing.T) {
+	t.Parallel()
+
+	var stdout, stderr bytes.Buffer
+	err := Run(context.Background(), nil, strings.NewReader(""), &stdout, &stderr)
+	if err == nil {
+		t.Fatal("expected error, got nil")
+	}
+	if !errors.Is(err, ErrUsage) {
+		t.Fatalf("error = %v, want ErrUsage", err)
+	}
+	if !strings.Contains(stderr.String(), "Usage: md-to-html cli") {
+		t.Fatalf("stderr missing usage: %s", stderr.String())
+	}
+}
+
+func TestCLIMissingFile(t *testing.T) {
+	t.Parallel()
+
+	var stdout, stderr bytes.Buffer
+	err := Run(context.Background(), []string{"missing.md"}, strings.NewReader(""), &stdout, &stderr)
+	if err == nil {
+		t.Fatal("expected error, got nil")
+	}
+	if errors.Is(err, ErrUsage) {
+		t.Fatalf("error = %v, did not want ErrUsage", err)
+	}
+	if stdout.Len() != 0 {
+		t.Fatalf("stdout = %q, want empty", stdout.String())
+	}
+}