Add LSP request and VSCode command

crates/rust-analyzer/src/handlers.rs

@@ -607,6 +607,24 @@ pub(crate) fn handle_runnables(
     Ok(res)
 }
 
+pub(crate) fn handle_related_tests(
+    snap: GlobalStateSnapshot,
+    params: lsp_ext::RelatedTestsParams,
+) -> Result<Vec<lsp_ext::TestInfo>> {
+    let _p = profile::span("handle_related_tests");
+    let position = from_proto::file_position(&snap, params.text_document_position)?;
+
+    let tests = snap.analysis.related_tests(position, None)?;
+    let mut res = Vec::new();
+    for it in tests {
+        if let Ok(runnable) = to_proto::runnable(&snap, it) {
+            res.push(lsp_ext::TestInfo { runnable })
+        }
+    }
+
+    Ok(res)
+}
+
 pub(crate) fn handle_completion(
     snap: GlobalStateSnapshot,
     params: lsp_types::CompletionParams,

crates/rust-analyzer/src/lsp_ext.rs

@@ -177,6 +177,26 @@ pub struct CargoRunnable {
     pub expect_test: Option<bool>,
 }
 
+pub enum RelatedTests {}
+
+impl Request for RelatedTests {
+    type Params = RelatedTestsParams;
+    type Result = Vec<TestInfo>;
+    const METHOD: &'static str = "rust-analyzer/relatedTests";
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct RelatedTestsParams {
+    #[serde(flatten)]
+    pub text_document_position: lsp_types::TextDocumentPositionParams,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct TestInfo {
+    pub runnable: Runnable,
+}
+
 pub enum InlayHints {}
 
 impl Request for InlayHints {

crates/rust-analyzer/src/main_loop.rs

@@ -500,6 +500,7 @@ impl GlobalState {
             .on::<lsp_ext::ExpandMacro>(handlers::handle_expand_macro)
             .on::<lsp_ext::ParentModule>(handlers::handle_parent_module)
             .on::<lsp_ext::Runnables>(handlers::handle_runnables)
+            .on::<lsp_ext::RelatedTests>(handlers::handle_related_tests)
             .on::<lsp_ext::InlayHints>(handlers::handle_inlay_hints)
             .on::<lsp_ext::CodeActionRequest>(handlers::handle_code_action)
             .on::<lsp_ext::CodeActionResolveRequest>(handlers::handle_code_action_resolve)

editors/code/package.json

@@ -202,6 +202,11 @@
                 "command": "rust-analyzer.openCargoToml",
                 "title": "Open Cargo.toml",
                 "category": "Rust Analyzer"
+            },
+            {
+                "command": "rust-analyzer.peekTests",
+                "title": "Peek related tests",
+                "category": "Rust Analyzer"
             }
         ],
         "keybindings": [

editors/code/src/commands.ts

@@ -9,6 +9,7 @@ import { RunnableQuickPick, selectRunnable, createTask, createArgs } from './run
 import { AstInspector } from './ast_inspector';
 import { isRustDocument, sleep, isRustEditor } from './util';
 import { startDebugSession, makeDebugConfig } from './debug';
+import { LanguageClient } from 'vscode-languageclient/node';
 
 export * from './ast_inspector';
 export * from './run';
@@ -456,17 +457,20 @@ export function reloadWorkspace(ctx: Ctx): Cmd {
     return async () => ctx.client.sendRequest(ra.reloadWorkspace);
 }
 
+async function showReferencesImpl(client: LanguageClient, uri: string, position: lc.Position, locations: lc.Location[]) {
+    if (client) {
+        await vscode.commands.executeCommand(
+            'editor.action.showReferences',
+            vscode.Uri.parse(uri),
+            client.protocol2CodeConverter.asPosition(position),
+            locations.map(client.protocol2CodeConverter.asLocation),
+        );
+    }
+}
+
 export function showReferences(ctx: Ctx): Cmd {
     return async (uri: string, position: lc.Position, locations: lc.Location[]) => {
-        const client = ctx.client;
-        if (client) {
-            await vscode.commands.executeCommand(
-                'editor.action.showReferences',
-                vscode.Uri.parse(uri),
-                client.protocol2CodeConverter.asPosition(position),
-                locations.map(client.protocol2CodeConverter.asLocation),
-            );
-        }
+        await showReferencesImpl(ctx.client, uri, position, locations);
     };
 }
 
@@ -555,6 +559,35 @@ export function run(ctx: Ctx): Cmd {
     };
 }
 
+export function peekTests(ctx: Ctx): Cmd {
+    const client = ctx.client;
+
+    return async () => {
+        const editor = ctx.activeRustEditor;
+        if (!editor || !client) return;
+
+        const uri = editor.document.uri.toString();
+        const position = client.code2ProtocolConverter.asPosition(
+            editor.selection.active,
+        );
+        
+        const tests = await client.sendRequest(ra.relatedTests, {
+            textDocument: { uri: uri },
+            position: position,
+        });
+
+        const locations: lc.Location[] = tests.map( it => {
+            return {
+                uri: it.runnable.location!.targetUri,
+                range: it.runnable.location!.targetSelectionRange
+            };
+        });
+
+        await showReferencesImpl(client, uri, position, locations);
+    };
+}
+
+
 export function runSingle(ctx: Ctx): Cmd {
     return async (runnable: ra.Runnable) => {
         const editor = ctx.activeRustEditor;

editors/code/src/lsp_ext.ts

@@ -72,6 +72,15 @@ export interface Runnable {
 }
 export const runnables = new lc.RequestType<RunnablesParams, Runnable[], void>("experimental/runnables");
 
+export interface RelatedTestsParams extends lc.TextDocumentPositionParams {    
+}
+
+export interface TestInfo {
+    runnable: Runnable;
+}
+
+export const relatedTests = new lc.RequestType<RelatedTestsParams, TestInfo[], void>("rust-analyzer/relatedTests");
+
 export type InlayHint = InlayHint.TypeHint | InlayHint.ParamHint | InlayHint.ChainingHint;
 
 export namespace InlayHint {

editors/code/src/main.ts

@@ -113,6 +113,7 @@ async function tryActivate(context: vscode.ExtensionContext) {
     ctx.registerCommand('newDebugConfig', commands.newDebugConfig);
     ctx.registerCommand('openDocs', commands.openDocs);
     ctx.registerCommand('openCargoToml', commands.openCargoToml);
+    ctx.registerCommand('peekTests', commands.peekTests);
 
     defaultOnEnter.dispose();
     ctx.registerCommand('onEnter', commands.onEnter);