🧪 test: add unit tests for hasValidation logic (#12934)

Co-authored-by: Bill <bluebill1049@hotmail.com>

Author: kamja44

src/__tests__/logic/hasValidation.test.ts

@@ -0,0 +1,102 @@
+import hasValidation from '../../logic/hasValidation';
+import type { Field } from '../../types';
+
+describe('hasValidation', () => {
+  it('should return false if mount is not defined', () => {
+    const noMount = { required: true } as Field['_f'];
+    expect(hasValidation(noMount)).toBeFalsy();
+  });
+  const base = { mount: true } as Field['_f'];
+
+  it('should return false when field is not mounted', () => {
+    expect(hasValidation({ ...base, mount: false })).toBeFalsy();
+  });
+
+  it('should return false when there is no validation rule', () => {
+    expect(hasValidation(base)).toBeFalsy();
+  });
+
+  it('should return true when required is a string message', () => {
+    expect(hasValidation({ ...base, required: 'This field is required' })).toBe(
+      'This field is required',
+    );
+  });
+
+  it('should return false when validation rules are explicity falsy', () => {
+    expect(hasValidation({ ...base, required: false })).toBeFalsy();
+    expect(hasValidation({ ...base, validate: undefined })).toBeFalsy();
+  });
+
+  it('should return false for falsy but valid numeric values like min: 0, max: 0, minLength: 0 or maxLength: 0', () => {
+    expect(hasValidation({ ...base, min: 0 })).toBeFalsy();
+    expect(hasValidation({ ...base, minLength: 0 })).toBeFalsy();
+    expect(hasValidation({ ...base, max: 0 })).toBeFalsy();
+    expect(hasValidation({ ...base, maxLength: 0 })).toBeFalsy();
+  });
+
+  it('should return true when any validation rule is provided', () => {
+    expect(hasValidation({ ...base, required: true })).toBe(true);
+    expect(hasValidation({ ...base, min: 1 })).toBe(1);
+    expect(hasValidation({ ...base, max: 10 })).toBe(10);
+    expect(hasValidation({ ...base, minLength: 2 })).toBe(2);
+    expect(hasValidation({ ...base, maxLength: 20 })).toBe(20);
+    expect(hasValidation({ ...base, validate: () => true })).toBeTruthy();
+  });
+
+  it('should return true when pattern is provided', () => {
+    expect(
+      hasValidation({
+        ...base,
+        pattern: /test/,
+        valueAsDate: false,
+        valueAsNumber: false,
+      }),
+    ).toStrictEqual(/test/);
+    expect(
+      hasValidation({
+        ...base,
+        pattern: { value: /test/, message: 'invalid' },
+        valueAsDate: false,
+        valueAsNumber: false,
+      }),
+    ).toStrictEqual({ value: /test/, message: 'invalid' });
+  });
+
+  it('should return false when pattern is undefined or null', () => {
+    type TestFieldForPatternOnly = Field['_f'] & {
+      pattern: null;
+    };
+    expect(
+      hasValidation({
+        ...base,
+        pattern: undefined,
+        valueAsDate: false,
+        valueAsNumber: false,
+      }),
+    ).toBeFalsy();
+
+    expect(
+      hasValidation({ ...base, pattern: null } as TestFieldForPatternOnly),
+    ).toBeFalsy();
+  });
+
+  it('should return pattern even when valueAsDate and valueAsNumber are not provided', () => {
+    type TestFieldForPatternOnly = Field['_f'] & {
+      pattern: RegExp;
+    };
+    expect(
+      hasValidation({
+        ...base,
+        pattern: /test/,
+      } as TestFieldForPatternOnly),
+    ).toStrictEqual(/test/);
+  });
+
+  it('should return true when validate is an object', () => {
+    const validateObj = {
+      isValid: () => true,
+      isEmail: () => false,
+    };
+    expect(hasValidation({ ...base, validate: validateObj })).toBe(validateObj);
+  });
+});