Added greater granularity for boolean environment variables (#511)

* Added greater granularity for boolean environment variables

* Improved solution as reviewed

pkg/dashboard/utils/utils_test.go

@@ -2,6 +2,7 @@ package utils
 
 import (
 	"net/http/httptest"
+	"os"
 	"testing"
 
 	"github.com/gin-gonic/gin"
@@ -106,3 +107,53 @@ func TestChartAndVersion(t *testing.T) {
 		})
 	}
 }
+
+func TestEnvAsBool(t *testing.T) {
+	// value: "true" | "1", default: false -> expect true
+	t.Setenv("TEST", "true")
+	want := true
+	if EnvAsBool("TEST", false) != want {
+		t.Errorf("Env 'TEST' value '%v' should be parsed to %v", os.Getenv("TEST"), want)
+	}
+	t.Setenv("TEST", "1")
+	want = true
+	if EnvAsBool("TEST", false) != want {
+		t.Errorf("Env 'TEST' value '%v' should be parsed to %v", os.Getenv("TEST"), want)
+	}
+
+	// value: "false" | "0", default: true  -> expect false
+	t.Setenv("TEST", "false")
+	want = false
+	if EnvAsBool("TEST", true) != want {
+		t.Errorf("Env 'TEST' value '%v' should be parsed to %v", os.Getenv("TEST"), want)
+	}
+	t.Setenv("TEST", "0")
+	want = false
+	if EnvAsBool("TEST", true) != want {
+		t.Errorf("Env 'TEST' value '%v' should be parsed to %v", os.Getenv("TEST"), want)
+	}
+
+	// value: "" | *, default: false -> expect false
+	t.Setenv("TEST", "")
+	want = false
+	if EnvAsBool("TEST", false) != want {
+		t.Errorf("Env 'TEST' value '%v' should be parsed to %v", os.Getenv("TEST"), want)
+	}
+	t.Setenv("TEST", "10random")
+	want = false
+	if EnvAsBool("TEST", false) != want {
+		t.Errorf("Env 'TEST' value '%v' should be parsed to %v", os.Getenv("TEST"), want)
+	}
+
+	// value: "" | *, default: true -> expect true
+	t.Setenv("TEST", "")
+	want = true
+	if EnvAsBool("TEST", true) != want {
+		t.Errorf("Env 'TEST' value '%v' should be parsed to %v", os.Getenv("TEST"), want)
+	}
+	t.Setenv("TEST", "10random")
+	want = true
+	if EnvAsBool("TEST", true) != want {
+		t.Errorf("Env 'TEST' value '%v' should be parsed to %v", os.Getenv("TEST"), want)
+	}
+}