Add support to specify java executable to use for test

package.json

@@ -248,6 +248,11 @@
                             "description": "%configuration.java.test.config.modulePaths.description%",
                             "default": []
                         },
+                        "javaExec": {
+                            "type": "string",
+                            "description": "%configuration.java.test.config.javaExec.description%",
+                            "default": ""
+                        },
                         "vmArgs": {
                             "type": "array",
                             "items": {
@@ -381,6 +386,11 @@
                                 "description": "%configuration.java.test.config.modulePaths.description%",
                                 "default": []
                             },
+                            "javaExec": {
+                                "type": "string",
+                                "description": "%configuration.java.test.config.javaExec.description%",
+                                "default": ""
+                            },
                             "vmargs": {
                                 "type": "array",
                                 "items": {

package.nls.json

@@ -31,6 +31,7 @@
     "configuration.java.test.config.testKind.description": "Specify the targeting test framework for this test configuration. Supported values are `junit`, `testng`.",
     "configuration.java.test.config.filters.description": "Specify the test filters.",
     "configuration.java.test.config.filters.tags.description": "Specify the tags to be included or excluded. \n\nTags having `!` as the prefix will be **excluded**. \n\nNote: This setting **only** takes effect when `testKind` is set to `junit`.",
+    "configuration.java.test.config.javaExec.description": "The path to java executable to use. If unset project JDK's java executable is used.",
     "contributes.viewsWelcome.inLightWeightMode": "No test cases are listed because the Java Language Server is currently running in [LightWeight Mode](https://aka.ms/vscode-java-lightweight). To show test cases, click on the button to switch to Standard Mode.\n[Switch to Standard Mode](command:java.server.mode.switch?%5B%22Standard%22,true%5D)",
     "contributes.viewsWelcome.enableTests": "Click below button to configure a test framework for your project.\n[Enable Java Tests](command:_java.test.enableTests)"
 }

src/controller/testController.ts

@@ -225,7 +225,7 @@ export const runTests: (request: TestRunRequest, option: IRunOption) => any = in
                         }
                         try {
                             await runner.setup();
-                            const resolvedConfiguration: DebugConfiguration = option.launchConfiguration ?? await resolveLaunchConfigurationForRunner(runner, testContext, config);
+                            const resolvedConfiguration: DebugConfiguration = mergeConfigurations(option.launchConfiguration, config) ?? await resolveLaunchConfigurationForRunner(runner, testContext, config);
                             resolvedConfiguration.__progressId = option.progressReporter?.getId();
                             delegatedToDebugger = true;
                             await runner.run(resolvedConfiguration, token, option.progressReporter);
@@ -245,6 +245,21 @@ export const runTests: (request: TestRunRequest, option: IRunOption) => any = in
     }
 });
 
+function mergeConfigurations(launchConfiguration: DebugConfiguration | undefined, config: any): DebugConfiguration | undefined {
+    if (!launchConfiguration) {
+        return undefined;
+    }
+
+    const entryKeys: string[] = Object.keys(config);
+    for (const configKey of entryKeys) {
+        // for now we merge launcher properties which doesn't have a value.
+        if (!launchConfiguration[configKey]) {
+            launchConfiguration[configKey] = config[configKey];
+        }
+    }
+    return launchConfiguration;
+}
+
 /**
  * Set all the test item to queued state
  */

src/runConfigs.ts

@@ -34,6 +34,12 @@ export interface IExecutionConfig {
      */
     args?: any[];
 
+    /**
+     * The path to java executable to use. If undefined project JDK's java executable is used.
+     * @since 0.39.2
+     */
+    javaExec?: string;
+
     /**
      * the extra options and system properties for the JVM.
      * It's deprecated, we should align with the debug launch configuration, which is 'vmArgs'.

src/utils/launchUtils.ts

@@ -47,6 +47,7 @@ export async function resolveLaunchConfigurationForRunner(runner: BaseRunner, te
             sourcePaths: config?.sourcePaths,
             preLaunchTask: config?.preLaunchTask,
             postDebugTask: config?.postDebugTask,
+            javaExec: config?.javaExec,
         };
     }
 
@@ -76,6 +77,7 @@ export async function resolveLaunchConfigurationForRunner(runner: BaseRunner, te
         sourcePaths: config?.sourcePaths,
         preLaunchTask: config?.preLaunchTask,
         postDebugTask: config?.postDebugTask,
+        javaExec: config?.javaExec,
     };
 }