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/sheet_test.go

@@ -0,0 +1,71 @@
+package sheet
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/cheat/cheat/internal/mock"
+)
+
+// TestSheetSuccess asserts that sheets initialize properly
+func TestSheetSuccess(t *testing.T) {
+
+	// initialize a sheet
+	sheet, err := New(
+		"foo",
+		mock.Path("sheet/foo"),
+		[]string{"alpha", "bravo"},
+		false,
+	)
+	if err != nil {
+		t.Errorf("failed to load sheet: %v", err)
+	}
+
+	// assert that the sheet loaded correctly
+	if sheet.Title != "foo" {
+		t.Errorf("failed to init title: want: foo, got: %s", sheet.Title)
+	}
+
+	if sheet.Path != mock.Path("sheet/foo") {
+		t.Errorf(
+			"failed to init path: want: %s, got: %s",
+			mock.Path("sheet/foo"),
+			sheet.Path,
+		)
+	}
+
+	wantText := "# To foo the bar:\n  foo bar\n"
+	if sheet.Text != wantText {
+		t.Errorf("failed to init text: want: %s, got: %s", wantText, sheet.Text)
+	}
+
+	// NB: tags should sort alphabetically
+	wantTags := []string{"alpha", "bar", "baz", "bravo", "foo"}
+	if !reflect.DeepEqual(sheet.Tags, wantTags) {
+		t.Errorf("failed to init tags: want: %v, got: %v", wantTags, sheet.Tags)
+	}
+
+	if sheet.Syntax != "sh" {
+		t.Errorf("failed to init syntax: want: sh, got: %s", sheet.Syntax)
+	}
+
+	if sheet.ReadOnly != false {
+		t.Errorf("failed to init readonly")
+	}
+}
+
+// TestSheetFailure asserts that an error is returned if the sheet cannot be
+// read
+func TestSheetFailure(t *testing.T) {
+
+	// initialize a sheet
+	_, err := New(
+		"foo",
+		mock.Path("/does-not-exist"),
+		[]string{"alpha", "bravo"},
+		false,
+	)
+	if err == nil {
+		t.Errorf("failed to return an error on unreadable sheet")
+	}
+}