test(rewrite): Tests using TS-Jest for common package, fix isNotBlank

new/common/package.json

@@ -11,6 +11,7 @@
         "build:cjs": "tsc --module commonjs --outDir dist/cjs",
         "build:types": "tsc --emitDeclarationOnly --declaration --outDir dist/types",
         "build": "run-p build:esm build:cjs build:types",
+        "test": "jest .",
         "cleanbuild": "run-s clean build"
     },
     "exports": {

new/common/src/util.ts

@@ -20,7 +20,7 @@ export function isNotBlank(value: string | null | undefined): boolean {
     if (value.length < 1) {
         return false;
     }
-    return value.trim().length > 1;
+    return value.trim().length > 0;
 }
 export const isBlank = not(isNotBlank);
 

new/common/test/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "baseUrl": "..",
+    "paths": {
+      "#self/*": ["src/*"]
+    }
+  },
+  "include": ["./**/*.ts"]
+}

new/common/test/util.ts

@@ -0,0 +1,33 @@
+import { isNotBlank, isNotNull } from "#self/util";
+describe("isNotNull", () => {
+    it("should return true for non-null values", () => {
+        for (const value of [0, "0", "", "hello!", NaN, "1", "    "]) {
+            expect(isNotNull(value)).toBeTruthy();
+        }
+    });
+    it("should return false for null values", () => {
+        for (const value of [null, undefined]) {
+            expect(isNotNull(value)).toBeFalsy();
+        }
+    });
+});
+
+describe("isNotBlank", () => {
+    it("should return true for non-blank strings", () => {
+        for (const value of [
+            "abababa",
+            "this is not empty",
+            "...",
+            ".",
+            "0",
+            "1",
+        ]) {
+            expect(isNotBlank(value)).toBeTruthy();
+        }
+    });
+    it("should return false for blank strings", () => {
+        for (const value of ["    ", " ", "\n", "\n\n", "\r", "\t"]) {
+            expect(isNotBlank(value)).toBeFalsy();
+        }
+    });
+});

new/package.json

@@ -4,11 +4,14 @@
         "format": "prettier -w ."
     },
     "devDependencies": {
+        "@types/jest": "^29.5.5",
         "@typescript-eslint/eslint-plugin": "^6.4.1",
         "@typescript-eslint/parser": "^6.4.1",
         "eslint": "^8.48.0",
         "eslint-config-prettier": "^9.0.0",
+        "jest": "^29.7.0",
         "prettier": "^3.0.2",
+        "ts-jest": "^29.1.1",
         "typescript": "^5.2.2"
     }
 }