Re-wrote from scratch in Golang

- Re-implemented the project in Golang, and deprecated Python entirely
- Implemented several new, long-requested features
- Refactored cheatsheets into a separate repository

internal/sheet/copy_test.go

@@ -0,0 +1,102 @@
+package sheet
+
+import (
+	"io/ioutil"
+	"os"
+	"path"
+	"testing"
+)
+
+// TestCopyFlat asserts that Copy correctly copies files at a single level of
+// depth
+func TestCopyFlat(t *testing.T) {
+
+	// mock a cheatsheet file
+	text := "this is the cheatsheet text"
+	src, err := ioutil.TempFile("", "foo-src")
+	if err != nil {
+		t.Errorf("failed to mock cheatsheet: %v", err)
+	}
+	defer src.Close()
+	defer os.Remove(src.Name())
+
+	if _, err := src.WriteString(text); err != nil {
+		t.Errorf("failed to write to mock cheatsheet: %v", err)
+	}
+
+	// mock a cheatsheet struct
+	sheet, err := New("foo", src.Name(), []string{}, false)
+	if err != nil {
+		t.Errorf("failed to init cheatsheet: %v", err)
+	}
+
+	// compute the outfile's path
+	outpath := path.Join(os.TempDir(), sheet.Title)
+	defer os.Remove(outpath)
+
+	// attempt to copy the cheatsheet
+	err = sheet.Copy(outpath)
+	if err != nil {
+		t.Errorf("failed to copy cheatsheet: %v", err)
+	}
+
+	// assert that the destination file contains the correct text
+	got, err := ioutil.ReadFile(outpath)
+	if err != nil {
+		t.Errorf("failed to read destination file: %v", err)
+	}
+	if string(got) != text {
+		t.Errorf(
+			"destination file contained wrong text: want: '%s', got: '%s'",
+			text,
+			got,
+		)
+	}
+}
+
+// TestCopyDeep asserts that Copy correctly copies files at several levels of
+// depth
+func TestCopyDeep(t *testing.T) {
+
+	// mock a cheatsheet file
+	text := "this is the cheatsheet text"
+	src, err := ioutil.TempFile("", "foo-src")
+	if err != nil {
+		t.Errorf("failed to mock cheatsheet: %v", err)
+	}
+	defer src.Close()
+	defer os.Remove(src.Name())
+
+	if _, err := src.WriteString(text); err != nil {
+		t.Errorf("failed to write to mock cheatsheet: %v", err)
+	}
+
+	// mock a cheatsheet struct
+	sheet, err := New("/cheat-tests/alpha/bravo/foo", src.Name(), []string{}, false)
+	if err != nil {
+		t.Errorf("failed to init cheatsheet: %v", err)
+	}
+
+	// compute the outfile's path
+	outpath := path.Join(os.TempDir(), sheet.Title)
+	defer os.RemoveAll(path.Join(os.TempDir(), "cheat-tests"))
+
+	// attempt to copy the cheatsheet
+	err = sheet.Copy(outpath)
+	if err != nil {
+		t.Errorf("failed to copy cheatsheet: %v", err)
+	}
+
+	// assert that the destination file contains the correct text
+	got, err := ioutil.ReadFile(outpath)
+	if err != nil {
+		t.Errorf("failed to read destination file: %v", err)
+	}
+	if string(got) != text {
+		t.Errorf(
+			"destination file contained wrong text: want: '%s', got: '%s'",
+			text,
+			got,
+		)
+	}
+}