test(uberconfig): add tests for conflictHandler

test/plugins/uberconfig/conflictHandlerSpec.js

@@ -0,0 +1,82 @@
+'use strict';
+
+const conflictHandlerFactory = require('../../../lib/plugins/uberconfig/conflictHandler');
+
+describe('conflictHandler factory', () => {
+  it('returns a conflictHandler function', () => {
+    expect(typeof conflictHandlerFactory()).toBe('function');
+  });
+});
+
+function normalizeMessage(string) {
+  return string.replace(/\s/g, '');
+}
+
+describe('conflictHandler', () => {
+  it('passes errors that have not been decorated', () => {
+    const undecoratedError = new Error('foo');
+    const otherDefaults = [{
+      defaultValue: 'igel',
+      conflictResolver: jasmine.createSpy().and.throwError(
+        undecoratedError
+      ),
+    }];
+
+    expect(() => {
+      conflictHandlerFactory({})('hase', otherDefaults, 'lorem.ipsum');
+    }).toThrow(undecoratedError);
+  });
+
+  it('throws an error with links to create issues on conflicting toolboxes', () => {
+    const meta = {
+      name: 'make-some-foo',
+      bugs: 'http://example.org/foobugs',
+    };
+    const decoratedError = new Error('foo');
+    decoratedError.meta = {
+      name: 'be-really-bar',
+      bugs: 'http://example.org/barbugs',
+    };
+    const defaultValue = 'hase';
+    const otherDefaultValue = 'igel';
+    const someConfigKey = 'lorem.ipsum';
+    const otherDefaults = [{
+      defaultValue: otherDefaultValue,
+      conflictResolver: jasmine.createSpy().and.throwError(
+        decoratedError
+      ),
+    }, {
+      defaultValue: 'fuchs',
+      conflictResolver() {},
+    }];
+    const expectedErrorMessage = `
+      conflicting default values for config key "${someConfigKey}"
+       - "${otherDefaultValue}": ${decoratedError.meta.name}
+       - "${defaultValue}": ${meta.name}
+
+      Please notify the authors:
+       - "${decoratedError.meta.name}":
+                ${decoratedError.meta.bugs}/new?title=conflicting%20default%20
+                values%20for%20config%20key%20%22${someConfigKey}%22&body=%20-%20
+                %60%22${otherDefaultValue}%22%60%3A%20${decoratedError.meta.name}
+                %0A%20-%20%60%22${defaultValue}%22%60%3A%20${meta.name}
+       - "${meta.name}":
+                ${meta.bugs}/new?title=conflicting%20default%20
+                values%20for%20config%20key%20%22${someConfigKey}%22&body=%20-%20
+                %60%22${otherDefaultValue}%22%60%3A%20${decoratedError.meta.name}
+                %0A%20-%20%60%22${defaultValue}%22%60%3A%20${meta.name}
+    `;
+
+    let conflictError = null;
+
+    try {
+      conflictHandlerFactory(meta)({ defaultValue }, otherDefaults, someConfigKey);
+    } catch (err) {
+      conflictError = err;
+    }
+
+    expect(conflictError instanceof Error).toBe(true);
+    expect(normalizeMessage(conflictError.message))
+      .toBe(normalizeMessage(expectedErrorMessage));
+  });
+});