Visual Console Client: added a new lib function

Former-commit-id: 6bbfc18d06e36539f1b88084ecddcf8b65101e2e

visual_console/src/lib.spec.ts

@@ -1,4 +1,4 @@
-import { parseIntOr, padLeft, prefixedCssRules } from "./lib";
+import { parseIntOr, notEmptyStringOr, padLeft, prefixedCssRules } from "./lib";
 
 describe("function parseIntOr", () => {
   it("should retrieve valid int or a default value", () => {
@@ -12,6 +12,18 @@ describe("function parseIntOr", () => {
   });
 });
 
+describe("function notEmptyStringOr", () => {
+  it("should retrieve not empty string or a default value", () => {
+    expect(notEmptyStringOr("", null)).toBe(null);
+    expect(notEmptyStringOr("Foo", null)).toBe("Foo");
+    expect(notEmptyStringOr(1, 1)).toBe(1);
+    expect(notEmptyStringOr(1, 0)).toBe(0);
+    expect(notEmptyStringOr("", 0)).toBe(0);
+    expect(notEmptyStringOr("Foo", "Bar")).toBe("Foo");
+    expect(notEmptyStringOr(0, "Bar")).toBe("Bar");
+  });
+});
+
 describe("function padLeft", () => {
   it("should pad properly", () => {
     expect(padLeft(1, 2, 0)).toBe("01");

visual_console/src/lib.ts

@@ -22,6 +22,17 @@ export function parseIntOr<T>(value: any, defaultValue: T): number | T {
   else return defaultValue;
 }
 
+/**
+ * Return a not empty string or a default value from a raw value.
+ * @param value Raw value from which we will try to extract a non empty string.
+ * @param defaultValue Default value to use if we cannot extract a non empty string.
+ * @return A non empty string or the default value.
+ */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export function notEmptyStringOr<T>(value: any, defaultValue: T): string | T {
+  return typeof value === "string" && value.length > 0 ? value : defaultValue;
+}
+
 /**
  * Return a boolean from a raw value.
  * @param value Raw value from which we will try to extract the boolean.