fix 'Testcafe wrongly shows "filter" warning' (close #6620)

src/configuration/configuration-base.ts

@@ -1,14 +1,15 @@
-import { isAbsolute, extname } from 'path';
+import { extname, isAbsolute } from 'path';
 import debug from 'debug';
 import JSON5 from 'json5';
+
 import {
     castArray,
     cloneDeep,
     isPlainObject,
     mergeWith,
 } from 'lodash';
 
-import { stat, readFile } from '../utils/promisified-functions';
+import { readFile, stat } from '../utils/promisified-functions';
 import Option from './option';
 import OptionSource from './option-source';
 import resolvePathRelativelyCwd from '../utils/resolve-path-relatively-cwd';
@@ -268,6 +269,9 @@ export default class Configuration {
     }
 
     protected _addOverriddenOptionIfNecessary (value1: OptionValue, value2: OptionValue, source: OptionSource, optionName: string): void {
+        if (source === OptionSource.Default)
+            return;
+
         if (value1 === void 0 || value2 === void 0 || value1 === value2 || source !== OptionSource.Configuration)
             return;
 

src/configuration/default-values.ts

@@ -20,6 +20,7 @@ export const DEFAULT_RETRY_TEST_PAGES      = false;
 export const DEFAULT_DISABLE_HTTP2         = false;
 export const DEFAULT_PROXYLESS             = false;
 export const DEFAULT_SCREENSHOT_THUMBNAILS = true;
+export const DEFAULT_FILTER_FN             = null;
 
 export const DEFAULT_TYPESCRIPT_COMPILER_OPTIONS: Dictionary<boolean | number> = {
     experimentalDecorators:  true,

src/configuration/option-source.ts

@@ -1,4 +1,5 @@
 enum OptionSource {
+    Default = 'Default',
     Configuration = 'Configuration',
     Input = 'Input'
 }

src/configuration/testcafe-configuration.ts

@@ -12,18 +12,20 @@ import resolvePathRelativelyCwd from '../utils/resolve-path-relatively-cwd';
 import {
     DEFAULT_APP_INIT_DELAY,
     DEFAULT_CONCURRENCY_VALUE,
-    DEFAULT_SPEED_VALUE,
-    DEFAULT_TIMEOUT,
-    DEFAULT_SOURCE_DIRECTORIES,
     DEFAULT_DEVELOPMENT_MODE,
-    DEFAULT_RETRY_TEST_PAGES,
     DEFAULT_DISABLE_HTTP2,
+    DEFAULT_FILTER_FN,
     DEFAULT_PROXYLESS,
+    DEFAULT_RETRY_TEST_PAGES,
     DEFAULT_SCREENSHOT_THUMBNAILS,
+    DEFAULT_SOURCE_DIRECTORIES,
+    DEFAULT_SPEED_VALUE,
+    DEFAULT_TIMEOUT,
     getDefaultCompilerOptions,
 } from './default-values';
 
 import OptionSource from './option-source';
+
 import {
     Dictionary,
     FilterOption,
@@ -162,8 +164,8 @@ export default class TestCafeConfiguration extends Configuration {
         return result;
     }
 
-    private _prepareFlag (name: string): void {
-        const option = this._ensureOption(name, void 0, OptionSource.Configuration);
+    private _prepareFlag (name: string, source = OptionSource.Configuration): void {
+        const option = this._ensureOption(name, void 0, source);
 
         option.value = !!option.value;
     }
@@ -173,7 +175,7 @@ export default class TestCafeConfiguration extends Configuration {
     }
 
     private _prepareInitFlags (): void {
-        OPTION_INIT_FLAG_NAMES.forEach(name => this._prepareFlag(name));
+        OPTION_INIT_FLAG_NAMES.forEach(name => this._prepareFlag(name, OptionSource.Default));
     }
 
     private async _normalizeOptionsAfterLoad (): Promise<void> {
@@ -187,7 +189,7 @@ export default class TestCafeConfiguration extends Configuration {
     }
 
     private _prepareFilterFn (): void {
-        const filterOption = this._ensureOption(OPTION_NAMES.filter, null, OptionSource.Configuration);
+        const filterOption = this._ensureOption(OPTION_NAMES.filter, DEFAULT_FILTER_FN, OptionSource.Default);
 
         if (!filterOption.value)
             return;
@@ -200,7 +202,8 @@ export default class TestCafeConfiguration extends Configuration {
         if (filterOptionValue.fixtureGrep)
             filterOptionValue.fixtureGrep = getGrepOptions(OPTION_NAMES.filterFixtureGrep, filterOptionValue.fixtureGrep as string);
 
-        filterOption.value = getFilterFn(filterOption.value) as Function;
+        filterOption.value  = getFilterFn(filterOption.value) as Function;
+        filterOption.source = OptionSource.Configuration;
     }
 
     private _ensureScreenshotOptions (): void {