Add ValidationError tests

Author: davidwalschots

angular-reactive-validation/src/validation-error.spec.ts

@@ -0,0 +1,62 @@
+import { ValidationError } from './validation-error';
+
+describe('ValidationError', () => {
+  it(`fromFirstError takes the first error object from a FormControl`, () => {
+    const requiredErrorObject = {};
+    const control: any = {
+      errors: {
+        required: requiredErrorObject,
+        test: true
+      }
+    };
+    const error = ValidationError.fromFirstError(control);
+
+    expect(error.control).toEqual(control);
+    expect(error.key).toBe('required');
+    expect(error.errorObject).toEqual(requiredErrorObject);
+  });
+
+  it(`fromFirstError returns undefined when the FormControl has no errors`, () => {
+    const control: any = {
+      errors: null
+    };
+    const error = ValidationError.fromFirstError(control);
+
+    expect(error).toBe(undefined);
+  });
+
+  it(`hasMessage returns true when the errorObject contains a message`, () => {
+    const control: any = {
+      errors: {
+        required: {
+          message: 'This is the expected message'
+        }
+      }
+    };
+    const error = ValidationError.fromFirstError(control);
+    expect(error.hasMessage()).toBe(true);
+  });
+
+  it(`hasMessage returns false when the errorObject doesn't contain a message`, () => {
+    const control: any = {
+      errors: {
+        required: {}
+      }
+    };
+    const error = ValidationError.fromFirstError(control);
+    expect(error.hasMessage()).toBe(false);
+  });
+
+  it(`getMessage returns the message from the errorObject`, () => {
+    const expected = 'This is the expected message';
+    const control: any = {
+      errors: {
+        required: {
+          message: expected
+        }
+      }
+    };
+    const error = ValidationError.fromFirstError(control);
+    expect(error.getMessage()).toBe(expected);
+  });
+});