feat(selectivity): implement read-only and write-only selectivity modes

src/browser/cdp/selectivity/index.ts

@@ -10,6 +10,7 @@ import { getCollectedTestplaneDependencies } from "./testplane-selectivity";
 import { getHashReader } from "./hash-reader";
 import type { Config } from "../../../config";
 import { MasterEvents } from "../../../events";
+import { selectivityShouldWrite } from "./modes";
 
 type StopSelectivityFn = (test: Test, shouldWrite: boolean) => Promise<void>;
 
@@ -24,7 +25,7 @@ export const updateSelectivityHashes = async (config: Config): Promise<void> =>
         const browserConfig = config.forBrowser(browserId);
         const { enabled, testDependenciesPath, compression, disableSelectivityPatterns } = browserConfig.selectivity;
 
-        if (!enabled) {
+        if (!selectivityShouldWrite(enabled)) {
             continue;
         }
 
@@ -51,7 +52,7 @@ export const startSelectivity = async (browser: ExistingBrowser): Promise<StopSe
     const { enabled, compression, sourceRoot, testDependenciesPath, mapDependencyRelativePath } =
         browser.config.selectivity;
 
-    if (!enabled || !browser.publicAPI.isChromium) {
+    if (!selectivityShouldWrite(enabled) || !browser.publicAPI.isChromium) {
         return () => Promise.resolve();
     }
 

src/browser/cdp/selectivity/modes.ts

@@ -0,0 +1,7 @@
+import { SelectivityMode, type SelectivityModeValue } from "../../../config/types";
+
+export const selectivityIsDisabled = (mode: SelectivityModeValue): boolean => mode === SelectivityMode.Disabled;
+export const selectivityShouldWrite = (mode: SelectivityModeValue): boolean =>
+    mode === SelectivityMode.Enabled || mode === SelectivityMode.WriteOnly;
+export const selectivityShouldRead = (mode: SelectivityModeValue): boolean =>
+    mode === SelectivityMode.Enabled || mode === SelectivityMode.ReadOnly;

src/browser/cdp/selectivity/runner.ts

@@ -9,11 +9,12 @@ import type { Test, TestDepsContext, TestDepsData } from "../../../types";
 import { MasterEvents } from "../../../events";
 import { getHashWriter } from "./hash-writer";
 import { getTestDependenciesReader } from "./test-dependencies-reader";
+import { selectivityShouldRead } from "./modes";
 
 /** Called at the start of testplane run per each browser */
 const shouldDisableBrowserSelectivity = _.memoize(
     async (config: BrowserConfig, browserId: string): Promise<boolean> => {
-        if (!config.selectivity.enabled) {
+        if (!selectivityShouldRead(config.selectivity.enabled)) {
             return true;
         }
 
@@ -60,8 +61,9 @@ const shouldDisableBrowserSelectivity = _.memoize(
     },
     config => {
         const { enabled, testDependenciesPath, compression, disableSelectivityPatterns } = config.selectivity;
-        return enabled
-            ? enabled + "#" + testDependenciesPath + "#" + compression + "#" + disableSelectivityPatterns.join("#")
+
+        return selectivityShouldRead(enabled)
+            ? testDependenciesPath + "#" + compression + "#" + disableSelectivityPatterns.join("#")
             : "";
     },
 );
@@ -70,7 +72,7 @@ const shouldDisableTestBySelectivity = _.memoize(
     async (config: BrowserConfig, test: Test): Promise<boolean> => {
         const { enabled, testDependenciesPath, compression } = config.selectivity;
 
-        if (!enabled) {
+        if (!selectivityShouldRead(enabled)) {
             return false;
         }
 
@@ -99,7 +101,7 @@ const shouldDisableTestBySelectivity = _.memoize(
     (config, test) => {
         const { enabled, testDependenciesPath, compression } = config.selectivity;
 
-        return enabled ? enabled + "#" + testDependenciesPath + "#" + compression + "#" + test.id : "";
+        return selectivityShouldRead(enabled) ? testDependenciesPath + "#" + compression + "#" + test.id : "";
     },
 );
 
@@ -157,11 +159,11 @@ export class SelectivityRunner {
 
     startTestCheckToRun(test: Test, browserId: string): void {
         const browserConfig = this._config.forBrowser(browserId);
-        const isSelectivityEnabledForBrowser = browserConfig.selectivity.enabled;
+        const shouldSelectivelySkipTests = selectivityShouldRead(browserConfig.selectivity.enabled);
 
         // If selectivity is disabled for browser
         // If test is disabled on its own (e.g plugin testplane/chunks) we dont waste our time calculating the deps.
-        if (!isSelectivityEnabledForBrowser || this._opts?.shouldDisableSelectivity || test.disabled) {
+        if (!shouldSelectivelySkipTests || this._opts?.shouldDisableSelectivity || test.disabled) {
             this._testsToRun.push([test, browserId]);
             return;
         }
@@ -197,6 +199,10 @@ export class SelectivityRunner {
 
         shouldDisableBrowserSelectivity.cache.clear?.();
         shouldDisableTestBySelectivity.cache.clear?.();
-        getHashReader(this._config.selectivity.testDependenciesPath, this._config.selectivity.compression).clearCache();
+        this._config.getBrowserIds().forEach(browserId => {
+            const { selectivity } = this._config.forBrowser(browserId);
+
+            getHashReader(selectivity.testDependenciesPath, selectivity.compression).clearCache();
+        });
     }
 }

src/config/types.ts

@@ -268,16 +268,29 @@ type ReadinessProbeObj = {
 type ReadinessProbe = ReadinessProbeFn | ReadinessProbeObj;
 
 export enum TimeTravelMode {
-    // Record and save all test runs
+    /** @description Record and save all test runs */
     On = "on",
-    // Do not record any test runs
+    /** @description Do not record any test runs */
     Off = "off",
-    // Record and save all retries
+    /** @description Record and save all retries */
     RetriesOnly = "retries-only",
-    // Record all test runs, but save only last failed run
+    /** @description Record all test runs, but save only last failed run  */
     LastFailedRun = "last-failed-run",
 }
 
+export const SelectivityMode = {
+    /** @description Completely disables Testplane selectivity */
+    Disabled: false,
+    /** @description Skips running unchanged tests, does not update selectivity state after successful run */
+    ReadOnly: "read-only",
+    /** @description Runs unchanged tests, updates selectivity state after successful run */
+    WriteOnly: "write-only",
+    /** @description Skips running unchanged tests, updates selectivity state after successful run */
+    Enabled: true,
+} as const;
+
+export type SelectivityModeValue = (typeof SelectivityMode)[keyof typeof SelectivityMode];
+
 export interface TimeTravelConfig {
     mode: TimeTravelMode;
 }
@@ -392,7 +405,7 @@ export interface CommonConfig {
     };
 
     selectivity: {
-        enabled: boolean;
+        enabled: SelectivityModeValue;
         sourceRoot: string;
         testDependenciesPath: string;
         compression: SelectivityCompressionType;

src/config/utils.ts

@@ -1,5 +1,5 @@
 import _ from "lodash";
-import { ConfigParsed } from "./types";
+import { ConfigParsed, SelectivityMode, SelectivityModeValue } from "./types";
 
 type ValueType = "string" | "number" | "boolean" | "object" | "undefined" | "function";
 
@@ -100,16 +100,21 @@ export const addUserAgentToArgs = (config: ConfigParsed): ConfigParsed => {
     return config;
 };
 
-export const extractSelectivityEnabledEnvVariable = (envPrefixes: string[] = []): { enabled?: boolean } => {
+export const extractSelectivityEnabledEnvVariable = (
+    envPrefixes: string[] = [],
+): { enabled?: SelectivityModeValue } => {
     for (const envPrefix of envPrefixes) {
         const envName = envPrefix + "selectivity_enabled";
 
-        if (process.env[envName] === String(true)) {
-            return { enabled: true };
-        }
-
-        if (process.env[envName] === String(false)) {
-            return { enabled: false };
+        switch (process.env[envName]) {
+            case String(SelectivityMode.Enabled):
+                return { enabled: SelectivityMode.Enabled };
+            case String(SelectivityMode.Disabled):
+                return { enabled: SelectivityMode.Disabled };
+            case String(SelectivityMode.ReadOnly):
+                return { enabled: SelectivityMode.ReadOnly };
+            case String(SelectivityMode.WriteOnly):
+                return { enabled: SelectivityMode.WriteOnly };
         }
     }
 

src/worker/runner/index.js

@@ -13,6 +13,7 @@ const {
 } = require("../../browser/cdp/selectivity/testplane-selectivity");
 const ipc = require("../../utils/ipc");
 const { TEST_ASSIGNED_TO_WORKER } = require("../../constants/process-messages");
+const { selectivityShouldWrite } = require("../../browser/cdp/selectivity/modes");
 
 module.exports = class Runner extends AsyncEmitter {
     static create(config) {
@@ -55,13 +56,14 @@ module.exports = class Runner extends AsyncEmitter {
             attempt,
         });
 
-        const selectivityEnabled = config.selectivity && config.selectivity.enabled && isRunInNodeJsEnv(this._config);
+        const shouldRecordSelectivityDeps =
+            config.selectivity && selectivityShouldWrite(config.selectivity.enabled) && isRunInNodeJsEnv(this._config);
 
         const prepareParseAndRun = async () => {
             runner.prepareBrowser({ sessionId, sessionCaps, sessionOpts, state });
 
             const readTestsFn = () => this._testParser.parse({ file, browserId });
-            const tests = selectivityEnabled
+            const tests = shouldRecordSelectivityDeps
                 ? await readTestFileWithTestplaneDependenciesCollecting(file, readTestsFn)
                 : await readTestsFn();
 
@@ -72,6 +74,8 @@ module.exports = class Runner extends AsyncEmitter {
             return runner.run();
         };
 
-        return selectivityEnabled ? runWithTestplaneDependenciesCollecting(prepareParseAndRun) : prepareParseAndRun();
+        return shouldRecordSelectivityDeps
+            ? runWithTestplaneDependenciesCollecting(prepareParseAndRun)
+            : prepareParseAndRun();
     }
 };

test/src/browser/cdp/selectivity/hash-reader.ts

@@ -136,7 +136,6 @@ describe("CDP/Selectivity/HashReader", () => {
             const result = reader.patternHasChanged(pattern);
 
             assert.isRejected(result, /Couldn't find files by disableSelectivityPattern/);
-            assert.calledWith(hashProviderMock.calculateForPattern, pattern);
         });
     });