refactor: Move environment variables to constants (#98)

cmd/aoc-cli/flags.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"github.com/urfave/cli/v2"
+
+	"github.com/obalunenko/advent-of-code/internal/puzzles"
 )
 
 const (
@@ -48,7 +50,7 @@ func cmdRunFlags() []cli.Flag {
 		Name:        flagSession,
 		Aliases:     []string{flagShortSession},
 		Usage:       "AOC auth session to get inputs",
-		EnvVars:     []string{"AOC_SESSION"},
+		EnvVars:     []string{puzzles.AOCSession},
 		FilePath:    "",
 		Required:    true,
 		Hidden:      false,

internal/puzzles/constants.go

@@ -61,4 +61,7 @@ const (
 	unsolved   = "not solved"
 	undefined  = "undefined"
 	inProgress = "in progress"
+
+	// AOCSession env variable name.
+	AOCSession = "AOC_SESSION"
 )

tests/regression_test.go

@@ -25,15 +25,19 @@ type testcase struct {
 	wantErr bool
 }
 
+const (
+	regressionEnabled = "AOC_REGRESSION_ENABLED"
+)
+
 // Regression tests for all puzzles. Check that answers still correct.
 func TestRun(t *testing.T) {
-	if !getenv.BoolOrDefault("AOC_REGRESSION_ENABLED", false) {
-		t.Skip("Regression test disabled")
+	if !getenv.BoolOrDefault(regressionEnabled, false) {
+		t.Skipf("%s disabled", regressionEnabled)
 	}
 
-	session := getenv.StringOrDefault("AOC_SESSION", "")
+	session := getenv.StringOrDefault(puzzles.AOCSession, "")
 	if session == "" {
-		t.Fatal("AOC_SESSION not set")
+		t.Fatalf("%s not set", puzzles.AOCSession)
 	}
 
 	ctx := command.ContextWithSession(context.Background(), session)