test: add Rmd params tests and cleanup test files

- Added tests for getRmdParamsCommand in rmdParams.test.ts

- Exported getRmdParamsCommand in rTerminal.ts for testing

- Renamed sesson.test.ts to workspaceViewer.test.ts to fix typo

- Deleted duplicate workspace.ts file

Author: randy3k

src/rTerminal.ts

@@ -39,7 +39,7 @@ function valueToR(val: unknown): string {
     return `list(${entries.join(', ')})`;
 }
 
-function getRmdParamsCommand(document: vscode.TextDocument): string | undefined {
+export function getRmdParamsCommand(document: vscode.TextDocument): string | undefined {
     if (document.languageId !== 'rmd') return undefined;
     const text = document.getText();
     const match = text.match(/^---\s*\n([\s\S]*?)\n---/);

src/test/suite/rmdParams.test.ts

@@ -0,0 +1,91 @@
+import * as assert from 'assert';
+import * as vscode from 'vscode';
+import * as rTerminal from '../../rTerminal';
+
+suite('Rmd Params Test Suite', () => {
+    test('getRmdParamsCommand returns undefined for non-rmd documents', () => {
+        const mockDoc = {
+            languageId: 'r',
+            getText: () => '---\nparams:\n  a: 1\n---',
+            uri: vscode.Uri.file('/test_non_rmd.R'),
+            version: 1
+        } as vscode.TextDocument;
+        
+        const cmd = rTerminal.getRmdParamsCommand(mockDoc);
+        assert.strictEqual(cmd, undefined);
+    });
+
+    test('getRmdParamsCommand returns undefined if no YAML header', () => {
+        const mockDoc = {
+            languageId: 'rmd',
+            getText: () => 'title: Test\nparams:\n  a: 1',
+            uri: vscode.Uri.file('/test_no_header.Rmd'),
+            version: 1
+        } as vscode.TextDocument;
+        
+        const cmd = rTerminal.getRmdParamsCommand(mockDoc);
+        assert.strictEqual(cmd, undefined);
+    });
+
+    test('getRmdParamsCommand returns undefined if no params in YAML', () => {
+        const mockDoc = {
+            languageId: 'rmd',
+            getText: () => '---\ntitle: Test\n---',
+            uri: vscode.Uri.file('/test_no_params.Rmd'),
+            version: 1
+        } as vscode.TextDocument;
+        
+        const cmd = rTerminal.getRmdParamsCommand(mockDoc);
+        assert.strictEqual(cmd, undefined);
+    });
+
+    test('getRmdParamsCommand parses valid params', () => {
+        const mockDoc = {
+            languageId: 'rmd',
+            getText: () => '---\nparams:\n  a: 1\n  b: "test"\n---',
+            uri: vscode.Uri.file('/test_valid_params.Rmd'),
+            version: 1
+        } as vscode.TextDocument;
+        
+        const cmd = rTerminal.getRmdParamsCommand(mockDoc);
+        assert.strictEqual(cmd, 'params <- list(a = 1, b = "test")');
+    });
+
+    test('getRmdParamsCommand handles custom !r type', () => {
+        const mockDoc = {
+            languageId: 'rmd',
+            getText: () => '---\nparams:\n  a: !r 1+1\n---',
+            uri: vscode.Uri.file('/test_custom_type.Rmd'),
+            version: 1
+        } as vscode.TextDocument;
+        
+        const cmd = rTerminal.getRmdParamsCommand(mockDoc);
+        assert.strictEqual(cmd, 'params <- list(a = 1+1)');
+    });
+
+    test('getRmdParamsCommand respects cache invalidation by version', () => {
+        const mockDoc = {
+            languageId: 'rmd',
+            getText: () => '---\nparams:\n  a: 1\n---',
+            uri: vscode.Uri.file('/test_cache_invalidation.Rmd'),
+            version: 1
+        } as vscode.TextDocument;
+        
+        let cmd = rTerminal.getRmdParamsCommand(mockDoc);
+        assert.strictEqual(cmd, 'params <- list(a = 1)');
+        
+        // Same file, same version -> returns undefined (cached)
+        cmd = rTerminal.getRmdParamsCommand(mockDoc);
+        assert.strictEqual(cmd, undefined);
+        
+        // Same file, new version -> parses again
+        const updatedDoc = {
+            ...mockDoc,
+            getText: () => '---\nparams:\n  a: 2\n---',
+            version: 2
+        } as vscode.TextDocument;
+        
+        cmd = rTerminal.getRmdParamsCommand(updatedDoc);
+        assert.strictEqual(cmd, 'params <- list(a = 2)');
+    });
+});