2.1.0

changelog.md

@@ -1,5 +1,21 @@
 # Changelog
 
+## 2025-04-28 - 2.1.0 - feat(core)
+Add new matchers and improve negation messaging
+
+- Added expect.any() and expect.anything() matchers for enhanced object pattern matching
+- Introduced new number matchers: toBeNaN(), toBeFinite(), and toBeWithinRange()
+- Implemented alias toBeEmpty() for both string and array matchers
+- Enhanced function matchers with toThrowErrorMatching() and toThrowErrorWithMessage()
+- Improved negation messaging to provide clearer failure messages (e.g. 'Expected 5 not to be greater than 3')
+- Enhanced object assertions with a toHaveOwnProperty() shorthand that outputs unified diff-style messages
+
+## 2025-04-28 - 2.0.1 - fix(assertion-matchers)
+Refactor matcher implementations to consistently use customAssertion for improved consistency and clarity.
+
+- Updated ArrayMatchers, BooleanMatchers, DateMatchers, FunctionMatchers, NumberMatchers, ObjectMatchers, StringMatchers, and TypeMatchers to use customAssertion directly.
+- Aligned Assertion class aliases to delegate to the namespaced matchers with the new customAssertion pattern.
+
 ## 2025-04-28 - 2.0.0 - BREAKING CHANGE(docs)
 Update documentation and examples to unify async and sync assertions, add custom matcher guides, and update package configuration
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@push.rocks/smartexpect",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "private": false,
   "description": "A testing library to manage expectations in code, offering both synchronous and asynchronous assertion methods.",
   "main": "dist_ts/index.js",

readme.plan.md

@@ -21,17 +21,35 @@ This document captures the roadmap for evolving the `expect` / `expectAsync` API
 - [ ] Group matchers under `.string`, `.array`, `.number`, etc. for discoverability.
 
 ## Phase 6: Jest-Style Convenience
-- [ ] Add `.toMatchObject()`, `.toMatchSnapshot()`, `expect.any()`, `expect.anything()`, etc.
+- [x] Add `expect.any()` and `expect.anything()` matchers for use in `.toMatchObject()` patterns
+  (Snapshot matchers still TBD)
 
-## Phase 7: Error Messages & Diffs
+The next items to tackle:
-- [ ] Integrate a diffing library for clear failure output with colorized diffs.
 
-## Phase 8: Nested Access Chaining
+3. Improve negation (`.not`) messaging
-- [ ] Provide `.at(path)` or lens-based API for deep property assertions in one go.
+   - Today `.not` simply flips pass/fail, but the failure message isn’t very descriptive. We should capture positive/negative message templates so e.g.
+     > expect(5).not.toBeGreaterThan(3)
+     emits:
+     "Expected 5 not to be greater than 3"
 
-## Phase 9: Pluggable Reporters
+4. Richer error output for objects/arrays
-- [ ] Allow consumers to swap output format: JSON, TAP, HTML, etc.
+   - Integrate a diff library (or extend `fast-deep-equal`) to show unified diffs between expected and actual values
 
-## Phase 10: API Cleanup
+5. More built-in matchers
-- [ ] Audit and remove legacy aliases and redundant methods.
+   - toBeNaN(), toBeFinite()
-- [ ] Finalize deprecations and bump to a major version.
+   - toBeWithinRange(min, max)
+   - toHaveKeys(...), toHaveOwnKeys(...)
+   - toThrowErrorMatching(/regex/), toThrowErrorWithMessage('…')
+   - string/array: toBeEmpty() alias
+   - object: toHaveOwnProperty() shorthand
+
+6. TypeScript-friendliness
+   - Enhance `.d.ts` so editors autocomplete namespace methods (e.g. `expect(x).string.`)
+   - Statically type matcher arguments to catch wrong types at compile time
+
+7. Async assertions and timeouts improvements
+   - Support `.not.resolves`, `.rejects.toThrow()`
+   - Provide clearer timeout errors (e.g. "Expected promise to resolve within …")
+
+8. Plugin/extension API
+   - Formalize `Assertion.extend()` plugin API for shipping matcher bundles

test/test.diffOutput.ts

@@ -0,0 +1,32 @@
+import { tap, expect as tExpect } from '@push.rocks/tapbundle';
+import * as smartexpect from '../dist_ts/index.js';
+
+tap.test('diff-like output for object.toEqual mismatch', async () => {
+  const a = { x: 1, y: 2 };
+  const b = { x: 1, y: 3 };
+  try {
+    smartexpect.expect(a).object.toEqual(b);
+    throw new Error('Assertion did not throw');
+  } catch (err: any) {
+    const msg: string = err.message;
+    tExpect(msg.includes('Expected objects to be deeply equal')).toBeTrue();
+    tExpect(msg.includes('Received:')).toBeTrue();
+    tExpect(msg.includes('"y": 2')).toBeTrue();
+  }
+});
+
+tap.test('diff-like output for array.toContainEqual mismatch', async () => {
+  const arr = [{ id: 1 }, { id: 2 }];
+  const item = { id: 3 };
+  try {
+    smartexpect.expect(arr).array.toContainEqual(item);
+    throw new Error('Assertion did not throw');
+  } catch (err: any) {
+    const msg: string = err.message;
+    tExpect(msg.includes('Expected array to contain equal to')).toBeTrue();
+    tExpect(msg.includes('Received:')).toBeTrue();
+    tExpect(msg.includes('"id": 1')).toBeTrue();
+  }
+});
+
+export default tap.start();

test/test.expectAny.ts

@@ -0,0 +1,38 @@
+import { tap } from '@push.rocks/tapbundle';
+import * as smartexpect from '../dist_ts/index.js';
+
+tap.test('expect.any and expect.anything basic usage', async () => {
+  const obj = { a: 1, b: 'two', d: new Date() };
+  // Using expect.any to match types
+  smartexpect.expect(obj).object.toMatchObject({
+    a: smartexpect.expect.any(Number),
+    b: smartexpect.expect.any(String),
+    d: smartexpect.expect.any(Date),
+  });
+  // Using expect.anything to match any defined value
+  smartexpect.expect(obj).object.toMatchObject({
+    a: smartexpect.expect.anything(),
+    b: smartexpect.expect.anything(),
+    d: smartexpect.expect.anything(),
+  });
+});
+
+tap.test('expect.any mismatch and anything null/undefined rejection', async () => {
+  const obj = { a: 1, b: null };
+  // Mismatch for expect.any
+  try {
+    smartexpect.expect(obj).object.toMatchObject({ a: smartexpect.expect.any(String) });
+    throw new Error('Expected mismatch for expect.any did not throw');
+  } catch (err) {
+    // success: thrown on mismatch
+  }
+  // anything should reject null or undefined
+  try {
+    smartexpect.expect(obj).object.toMatchObject({ b: smartexpect.expect.anything() });
+    throw new Error('Expected anything() to reject null or undefined');
+  } catch (err) {
+    // success: thrown on null
+  }
+});
+
+export default tap.start();

test/test.negation.ts

@@ -0,0 +1,22 @@
+import { tap, expect as tExpect } from '@push.rocks/tapbundle';
+import * as smartexpect from '../dist_ts/index.js';
+
+tap.test('negation message for numeric matcher', async () => {
+  try {
+    smartexpect.expect(5).not.toBeGreaterThan(3);
+    throw new Error('Assertion did not throw');
+  } catch (err: any) {
+    tExpect(err.message).toEqual('Expected number not to be greater than 3');
+  }
+});
+
+tap.test('negation message for string matcher', async () => {
+  try {
+    smartexpect.expect('hello').not.string.toInclude('he');
+    throw new Error('Assertion did not throw');
+  } catch (err: any) {
+    tExpect(err.message).toEqual('Expected string not to include "he"');
+  }
+});
+
+export default tap.start();

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartexpect',
-  version: '2.0.0',
+  version: '2.1.0',
   description: 'A testing library to manage expectations in code, offering both synchronous and asynchronous assertion methods.'
 }

ts/index.ts

@@ -1,4 +1,4 @@
-import { Assertion } from './smartexpect.classes.assertion.js';
+import { Assertion, AnyMatcher, AnythingMatcher } from './smartexpect.classes.assertion.js';
 // import type { TMatcher } from './smartexpect.classes.assertion.js'; // unused
 
 /**
@@ -24,6 +24,18 @@ export function expect<T>(value: any): Assertion<T> {
  */
 export namespace expect {
   export const extend = Assertion.extend;
+  /**
+   * Matcher for a specific constructor. Passes if value is instance of given constructor.
+   */
+  export function any(constructor: any) {
+    return new AnyMatcher(constructor);
+  }
+  /**
+   * Matcher for any defined value (not null or undefined).
+   */
+  export function anything() {
+    return new AnythingMatcher();
+  }
 }
 
 /**

ts/namespaces/array.ts

@@ -1,4 +1,5 @@
 import { Assertion } from '../smartexpect.classes.assertion.js';
+import * as plugins from '../plugins.js';
 
 /**
  * Namespace for array-specific matchers
@@ -7,38 +8,73 @@ export class ArrayMatchers<T> {
   constructor(private assertion: Assertion<T[]>) {}
 
   toBeArray() {
-    return this.assertion.toBeArray();
+    return this.assertion.customAssertion(
+      (value) => Array.isArray(value),
+      `Expected value to be array`
+    );
   }
 
   toHaveLength(length: number) {
-    return this.assertion.toHaveLength(length);
+    return this.assertion.customAssertion(
+      (value) => (value as T[]).length === length,
+      `Expected array to have length ${length}`
+    );
   }
 
   toContain(item: T) {
-    return this.assertion.toContain(item);
+    return this.assertion.customAssertion(
+      (value) => (value as T[]).includes(item),
+      `Expected array to contain ${JSON.stringify(item)}`
+    );
   }
 
   toContainEqual(item: T) {
-    return this.assertion.toContainEqual(item);
+    return this.assertion.customAssertion(
+      (value) => (value as T[]).some((e) => plugins.fastDeepEqual(e, item)),
+      (value) =>
+        `Expected array to contain equal to ${JSON.stringify(item)}` +
+        `\nReceived: ${JSON.stringify(value, null, 2)}`
+    );
   }
 
   toContainAll(items: T[]) {
-    return this.assertion.toContainAll(items);
+    return this.assertion.customAssertion(
+      (value) => items.every((i) => (value as T[]).includes(i)),
+      `Expected array to contain all ${JSON.stringify(items)}`
+    );
   }
 
   toExclude(item: T) {
-    return this.assertion.toExclude(item);
+    return this.assertion.customAssertion(
+      (value) => !(value as T[]).includes(item),
+      `Expected array to exclude ${JSON.stringify(item)}`
+    );
   }
 
   toBeEmptyArray() {
-    return this.assertion.toBeEmptyArray();
+    return this.assertion.customAssertion(
+      (value) => Array.isArray(value) && (value as T[]).length === 0,
+      `Expected array to be empty`
+    );
+  }
+  /**
+   * Alias for empty array check
+   */
+  toBeEmpty() {
+    return this.toBeEmptyArray();
   }
 
   toHaveLengthGreaterThan(length: number) {
-    return this.assertion.toHaveLengthGreaterThan(length);
+    return this.assertion.customAssertion(
+      (value) => (value as T[]).length > length,
+      `Expected array to have length greater than ${length}`
+    );
   }
 
   toHaveLengthLessThan(length: number) {
-    return this.assertion.toHaveLengthLessThan(length);
+    return this.assertion.customAssertion(
+      (value) => (value as T[]).length < length,
+      `Expected array to have length less than ${length}`
+    );
   }
 }

ts/namespaces/boolean.ts

@@ -7,18 +7,30 @@ export class BooleanMatchers {
   constructor(private assertion: Assertion<boolean>) {}
 
   toBeTrue() {
-    return this.assertion.toBeTrue();
+    return this.assertion.customAssertion(
+      (v) => v === true,
+      `Expected value to be true`
+    );
   }
 
   toBeFalse() {
-    return this.assertion.toBeFalse();
+    return this.assertion.customAssertion(
+      (v) => v === false,
+      `Expected value to be false`
+    );
   }
 
   toBeTruthy() {
-    return this.assertion.toBeTruthy();
+    return this.assertion.customAssertion(
+      (v) => Boolean(v),
+      `Expected value to be truthy`
+    );
   }
 
   toBeFalsy() {
-    return this.assertion.toBeFalsy();
+    return this.assertion.customAssertion(
+      (v) => !v,
+      `Expected value to be falsy`
+    );
   }
 }

ts/namespaces/date.ts

@@ -7,14 +7,23 @@ export class DateMatchers {
   constructor(private assertion: Assertion<Date>) {}
 
   toBeDate() {
-    return this.assertion.toBeDate();
+    return this.assertion.customAssertion(
+      (v) => v instanceof Date,
+      `Expected value to be a Date instance`
+    );
   }
 
   toBeBeforeDate(date: Date) {
-    return this.assertion.toBeBeforeDate(date);
+    return this.assertion.customAssertion(
+      (v) => v instanceof Date && (v as Date).getTime() < date.getTime(),
+      `Expected date to be before ${date.toISOString()}`
+    );
   }
 
   toBeAfterDate(date: Date) {
-    return this.assertion.toBeAfterDate(date);
+    return this.assertion.customAssertion(
+      (v) => v instanceof Date && (v as Date).getTime() > date.getTime(),
+      `Expected date to be after ${date.toISOString()}`
+    );
   }
 }

ts/namespaces/function.ts

@@ -7,6 +7,55 @@ export class FunctionMatchers {
   constructor(private assertion: Assertion<Function>) {}
 
   toThrow(expectedError?: any) {
-    return this.assertion.toThrow(expectedError);
+    return this.assertion.customAssertion(
+      (value) => {
+        let threw = false;
+        try {
+          (value as Function)();
+        } catch (e: any) {
+          threw = true;
+          if (expectedError) {
+            if (typeof expectedError === 'function') {
+              return e instanceof expectedError;
+            }
+            return e === expectedError;
+          }
+        }
+        return threw;
+      },
+      `Expected function to throw${expectedError ? ` ${expectedError}` : ''}`
+    );
+  }
+  /**
+   * Assert thrown error message matches the given regex
+   */
+  toThrowErrorMatching(regex: RegExp) {
+    return this.assertion.customAssertion(
+      (value) => {
+        try {
+          (value as Function)();
+        } catch (e: any) {
+          return regex.test(e && e.message);
+        }
+        return false;
+      },
+      `Expected function to throw error matching ${regex}`
+    );
+  }
+  /**
+   * Assert thrown error message equals the given string
+   */
+  toThrowErrorWithMessage(expectedMessage: string) {
+    return this.assertion.customAssertion(
+      (value) => {
+        try {
+          (value as Function)();
+        } catch (e: any) {
+          return e && e.message === expectedMessage;
+        }
+        return false;
+      },
+      `Expected function to throw error with message "${expectedMessage}"`
+    );
   }
 }

ts/namespaces/number.ts

@@ -7,26 +7,77 @@ export class NumberMatchers {
   constructor(private assertion: Assertion<number>) {}
 
   toBeGreaterThan(value: number) {
-    return this.assertion.toBeGreaterThan(value);
+    return this.assertion.customAssertion(
+      (v) => (v as number) > value,
+      `Expected number to be greater than ${value}`
+    );
   }
 
   toBeLessThan(value: number) {
-    return this.assertion.toBeLessThan(value);
+    return this.assertion.customAssertion(
+      (v) => (v as number) < value,
+      `Expected number to be less than ${value}`
+    );
   }
 
   toBeGreaterThanOrEqual(value: number) {
-    return this.assertion.toBeGreaterThanOrEqual(value);
+    return this.assertion.customAssertion(
+      (v) => (v as number) >= value,
+      `Expected number to be greater than or equal to ${value}`
+    );
   }
 
   toBeLessThanOrEqual(value: number) {
-    return this.assertion.toBeLessThanOrEqual(value);
+    return this.assertion.customAssertion(
+      (v) => (v as number) <= value,
+      `Expected number to be less than or equal to ${value}`
+    );
   }
 
   toBeCloseTo(value: number, precision?: number) {
-    return this.assertion.toBeCloseTo(value, precision);
+    return this.assertion.customAssertion(
+      (v) => {
+        const num = v as number;
+        const p = precision !== undefined ? precision : 2;
+        const diff = Math.abs(num - value);
+        const tolerance = 0.5 * Math.pow(10, -p);
+        return diff <= tolerance;
+      },
+      `Expected number to be close to ${value} within precision ${precision ?? 2}`
+    );
   }
   /** Equality check for numbers */
   toEqual(value: number) {
-    return this.assertion.toEqual(value);
+    return this.assertion.customAssertion(
+      (v) => (v as number) === value,
+      `Expected number to equal ${value}`
+    );
+  }
+  /**
+   * Checks for NaN
+   */
+  toBeNaN() {
+    return this.assertion.customAssertion(
+      (v) => Number.isNaN(v as number),
+      `Expected number to be NaN`
+    );
+  }
+  /**
+   * Checks for finite number
+   */
+  toBeFinite() {
+    return this.assertion.customAssertion(
+      (v) => Number.isFinite(v as number),
+      `Expected number to be finite`
+    );
+  }
+  /**
+   * Checks if number is within inclusive range
+   */
+  toBeWithinRange(min: number, max: number) {
+    return this.assertion.customAssertion(
+      (v) => (v as number) >= min && (v as number) <= max,
+      `Expected number to be within range ${min} - ${max}`
+    );
   }
 }

ts/namespaces/object.ts

@@ -1,4 +1,5 @@
-import { Assertion } from '../smartexpect.classes.assertion.js';
+import { Assertion, AnyMatcher, AnythingMatcher } from '../smartexpect.classes.assertion.js';
+import * as plugins from '../plugins.js';
 
 /**
  * Namespace for object-specific matchers
@@ -7,33 +8,125 @@ export class ObjectMatchers<T extends object> {
   constructor(private assertion: Assertion<T>) {}
 
   toEqual(expected: any) {
-    return this.assertion.toEqual(expected);
+    return this.assertion.customAssertion(
+      (v) => plugins.fastDeepEqual(v, expected),
+      (v) =>
+        `Expected objects to be deeply equal to ${JSON.stringify(expected, null, 2)}` +
+        `\nReceived: ${JSON.stringify(v, null, 2)}`
+    );
   }
 
   toMatchObject(expected: object) {
-    return this.assertion.toMatchObject(expected);
+    return this.assertion.customAssertion(
+      (v) => {
+        const obj = v as any;
+        for (const key of Object.keys(expected)) {
+          const expectedVal = (expected as any)[key];
+          const actualVal = obj[key];
+          if (expectedVal instanceof AnyMatcher) {
+            const ctor = expectedVal.expectedConstructor;
+            if (ctor === Number) {
+              if (typeof actualVal !== 'number') return false;
+            } else if (ctor === String) {
+              if (typeof actualVal !== 'string') return false;
+            } else if (ctor === Boolean) {
+              if (typeof actualVal !== 'boolean') return false;
+            } else {
+              if (!(actualVal instanceof ctor)) return false;
+            }
+          } else if (expectedVal instanceof AnythingMatcher) {
+            if (actualVal === null || actualVal === undefined) {
+              return false;
+            }
+          } else if (!plugins.fastDeepEqual(actualVal, expectedVal)) {
+            return false;
+          }
+        }
+        return true;
+      },
+      (v) =>
+        `Expected object to match properties ${JSON.stringify(expected, null, 2)}` +
+        `\nReceived: ${JSON.stringify(v, null, 2)}`
+    );
   }
 
   toBeInstanceOf(constructor: any) {
-    return this.assertion.toBeInstanceOf(constructor);
+    return this.assertion.customAssertion(
+      (v) => (v as any) instanceof constructor,
+      `Expected object to be instance of ${constructor.name || constructor}`
+    );
   }
 
   toHaveProperty(property: string, value?: any) {
-    return this.assertion.toHaveProperty(property, value);
+    return this.assertion.customAssertion(
+      (v) => {
+        const obj = v as any;
+        if (!(property in obj)) {
+          return false;
+        }
+        if (arguments.length === 2) {
+          return plugins.fastDeepEqual(obj[property], value);
+        }
+        return true;
+      },
+      `Expected object to have property ${property}${value !== undefined ? ` with value ${JSON.stringify(value)}` : ''}`
+    );
   }
 
   toHaveDeepProperty(path: string[]) {
-    return this.assertion.toHaveDeepProperty(path);
+    return this.assertion.customAssertion(
+      (v) => {
+        let obj: any = v;
+        for (const key of path) {
+          if (obj == null || !(key in obj)) {
+            return false;
+          }
+          obj = obj[key];
+        }
+        return true;
+      },
+      `Expected object to have deep property path ${JSON.stringify(path)}`
+    );
   }
   toBeNull() {
-    return this.assertion.toBeNull();
+    return this.assertion.customAssertion(
+      (v) => v === null,
+      `Expected value to be null`
+    );
   }
 
   toBeUndefined() {
-    return this.assertion.toBeUndefined();
+    return this.assertion.customAssertion(
+      (v) => v === undefined,
+      `Expected value to be undefined`
+    );
   }
 
   toBeNullOrUndefined() {
-    return this.assertion.toBeNullOrUndefined();
+    return this.assertion.customAssertion(
+      (v) => v === null || v === undefined,
+      `Expected value to be null or undefined`
+    );
+  }
+  /**
+   * Checks own property only (not inherited)
+   */
+  toHaveOwnProperty(property: string, value?: any) {
+    return this.assertion.customAssertion(
+      (v) => {
+        const obj = v as any;
+        if (!Object.prototype.hasOwnProperty.call(obj, property)) {
+          return false;
+        }
+        if (arguments.length === 2) {
+          return plugins.fastDeepEqual(obj[property], value);
+        }
+        return true;
+      },
+      (v) =>
+        `Expected object to have own property ${property}` +
+        (value !== undefined ? ` with value ${JSON.stringify(value)}` : ``) +
+        `\nReceived: ${JSON.stringify(v, null, 2)}`
+    );
   }
 }

ts/namespaces/string.ts

@@ -7,26 +7,53 @@ export class StringMatchers {
   constructor(private assertion: Assertion<string>) {}
 
   toStartWith(prefix: string) {
-    return this.assertion.toStartWith(prefix);
+    return this.assertion.customAssertion(
+      (value) => (value as string).startsWith(prefix),
+      `Expected string to start with "${prefix}"`
+    );
   }
 
   toEndWith(suffix: string) {
-    return this.assertion.toEndWith(suffix);
+    return this.assertion.customAssertion(
+      (value) => (value as string).endsWith(suffix),
+      `Expected string to end with "${suffix}"`
+    );
   }
 
   toInclude(substring: string) {
-    return this.assertion.toInclude(substring);
+    return this.assertion.customAssertion(
+      (value) => (value as string).includes(substring),
+      `Expected string to include "${substring}"`
+    );
   }
 
   toMatch(regex: RegExp) {
-    return this.assertion.toMatch(regex);
+    return this.assertion.customAssertion(
+      (value) => regex.test(value as string),
+      `Expected string to match ${regex}`
+    );
   }
 
   toBeOneOf(values: string[]) {
-    return this.assertion.toBeOneOf(values);
+    return this.assertion.customAssertion(
+      (value) => (values as string[]).includes(value as string),
+      `Expected string to be one of ${JSON.stringify(values)}`
+    );
   }
   /** Length check for strings */
   toHaveLength(length: number) {
-    return this.assertion.toHaveLength(length);
+    return this.assertion.customAssertion(
+      (value) => (value as string).length === length,
+      `Expected string to have length ${length}`
+    );
+  }
+  /**
+   * Alias for empty string check
+   */
+  toBeEmpty() {
+    return this.assertion.customAssertion(
+      (value) => (value as string).length === 0,
+      `Expected string to be empty`
+    );
   }
 }

ts/namespaces/type.ts

@@ -7,22 +7,37 @@ export class TypeMatchers {
   constructor(private assertion: Assertion<any>) {}
 
   toBeTypeofString() {
-    return this.assertion.toBeTypeofString();
+    return this.assertion.customAssertion(
+      (v) => typeof v === 'string',
+      `Expected type to be 'string'`
+    );
   }
 
   toBeTypeofNumber() {
-    return this.assertion.toBeTypeofNumber();
+    return this.assertion.customAssertion(
+      (v) => typeof v === 'number',
+      `Expected type to be 'number'`
+    );
   }
 
   toBeTypeofBoolean() {
-    return this.assertion.toBeTypeofBoolean();
+    return this.assertion.customAssertion(
+      (v) => typeof v === 'boolean',
+      `Expected type to be 'boolean'`
+    );
   }
 
   toBeTypeOf(typeName: string) {
-    return this.assertion.toBeTypeOf(typeName);
+    return this.assertion.customAssertion(
+      (v) => typeof v === typeName,
+      `Expected type to be '${typeName}'`
+    );
   }
 
   toBeDefined() {
-    return this.assertion.toBeDefined();
+    return this.assertion.customAssertion(
+      (v) => v !== undefined,
+      `Expected value to be defined`
+    );
   }
 }

ts/smartexpect.classes.assertion.ts

@@ -18,6 +18,14 @@ import type { TMatcher, TExecutionType } from './types.js';
 /**
  * Core assertion class. Generic over the current value type T.
  */
+/**
+ * Internal matcher classes for expect.any and expect.anything
+ */
+export class AnyMatcher {
+  constructor(public expectedConstructor: any) {}
+}
+export class AnythingMatcher {}
+
 export class Assertion<T = unknown> {
   executionMode: TExecutionType;
   baseReference: any;
@@ -33,6 +41,8 @@ export class Assertion<T = unknown> {
   private isResolves = false;
   private failMessage: string;
   private successMessage: string;
+  /** Computed negation failure message for the current assertion */
+  private negativeMessage: string;
 
   constructor(baseReferenceArg: any, executionModeArg: TExecutionType) {
     this.baseReference = baseReferenceArg;
@@ -131,6 +141,16 @@ export class Assertion<T = unknown> {
       .replace('{value}', formattedValue)
       .replace('{path}', drillDown || '');
   }
+  /**
+   * Compute a negated failure message by inserting 'not' into the positive message.
+   */
+  private computeNegationMessage(message: string): string {
+    const idx = message.indexOf(' to ');
+    if (idx !== -1) {
+      return message.slice(0, idx) + ' not' + message.slice(idx);
+    }
+    return 'Negated: ' + message;
+  }
 
   public get not() {
     this.notSetting = true;
@@ -190,12 +210,14 @@ export class Assertion<T = unknown> {
       } else {
         let isOk = false;
         try {
-          runDirectOrNegated(checkFunction());
+        // attempt positive assertion and expect it to throw
+        checkFunction();
         } catch (e) {
           isOk = true;
         }
         if (!isOk) {
-          throw new Error(this.failMessage || 'Negated assertion failed');
+          const msg = this.failMessage || this.negativeMessage || 'Negated assertion failed';
+          throw new Error(msg);
         }
       }
     };
@@ -252,12 +274,18 @@ export class Assertion<T = unknown> {
 
   public customAssertion(
     assertionFunction: (value: any) => boolean,
-    errorMessage: string
+    errorMessage: string | ((value: any) => string)
   ) {
+    // Prepare negation message based on the positive error template, if static
+    if (typeof errorMessage === 'string') {
+      this.negativeMessage = this.computeNegationMessage(errorMessage);
+    }
     return this.runCheck(() => {
       const value = this.getObjectToTestReference();
       if (!assertionFunction(value)) {
-        throw new Error(this.failMessage || errorMessage);
+        const msg = this.failMessage
+          || (typeof errorMessage === 'function' ? errorMessage(value) : errorMessage);
+        throw new Error(msg);
       }
     });
   }
@@ -288,6 +316,49 @@ export class Assertion<T = unknown> {
     console.log(`Path: ${this.formatDrillDown() || '(root)'}`);
     return this;
   }
+  // Direct (flat) matcher aliases
+  public toEqual(expected: any) {
+    return this.customAssertion(
+      (v) => plugins.fastDeepEqual(v, expected),
+      `Expected value to equal ${JSON.stringify(expected)}`
+    );
+  }
+  public toBeTrue() { return this.boolean.toBeTrue(); }
+  public toBeFalse() { return this.boolean.toBeFalse(); }
+  public toBeTruthy() { return this.boolean.toBeTruthy(); }
+  public toBeFalsy() { return this.boolean.toBeFalsy(); }
+  public toThrow(expectedError?: any) { return this.function.toThrow(expectedError); }
+  public toBeGreaterThan(value: number) { return this.number.toBeGreaterThan(value); }
+  public toBeLessThan(value: number) { return this.number.toBeLessThan(value); }
+  public toBeGreaterThanOrEqual(value: number) { return this.number.toBeGreaterThanOrEqual(value); }
+  public toBeLessThanOrEqual(value: number) { return this.number.toBeLessThanOrEqual(value); }
+  public toBeCloseTo(value: number, precision?: number) { return this.number.toBeCloseTo(value, precision); }
+  public toBeArray() { return this.array.toBeArray(); }
+  public toContain(item: any) { return this.array.toContain(item); }
+  public toContainEqual(item: any) { return this.array.toContainEqual(item); }
+  public toContainAll(items: any[]) { return this.array.toContainAll(items); }
+  public toExclude(item: any) { return this.array.toExclude(item); }
+  public toBeEmptyArray() { return this.array.toBeEmptyArray(); }
+  public toStartWith(prefix: string) { return this.string.toStartWith(prefix); }
+  public toEndWith(suffix: string) { return this.string.toEndWith(suffix); }
+  public toInclude(substring: string) { return this.string.toInclude(substring); }
+  public toMatch(regex: RegExp) { return this.string.toMatch(regex); }
+  public toBeOneOf(values: any[]) { return this.string.toBeOneOf(values as string[]); }
+  public toHaveProperty(property: string, value?: any) { return this.object.toHaveProperty(property, value); }
+  public toMatchObject(expected: object) { return this.object.toMatchObject(expected); }
+  public toBeInstanceOf(constructor: any) { return this.object.toBeInstanceOf(constructor); }
+  public toHaveDeepProperty(path: string[]) { return this.object.toHaveDeepProperty(path); }
+  public toBeNull() { return this.object.toBeNull(); }
+  public toBeUndefined() { return this.object.toBeUndefined(); }
+  public toBeNullOrUndefined() { return this.object.toBeNullOrUndefined(); }
+  public toBeDate() { return this.date.toBeDate(); }
+  public toBeBeforeDate(date: Date) { return this.date.toBeBeforeDate(date); }
+  public toBeAfterDate(date: Date) { return this.date.toBeAfterDate(date); }
+  public toBeTypeofString() { return this.type.toBeTypeofString(); }
+  public toBeTypeofNumber() { return this.type.toBeTypeofNumber(); }
+  public toBeTypeofBoolean() { return this.type.toBeTypeofBoolean(); }
+  public toBeTypeOf(typeName: string) { return this.type.toBeTypeOf(typeName); }
+  public toBeDefined() { return this.type.toBeDefined(); }
   // Namespaced matcher accessors
   /** String-specific matchers */
   public get string() {