1 files changed, 54 insertions, 0 deletions
diff --git a/tests/drivers/hold_lsp_test.js b/tests/drivers/hold_lsp_test.js
new file mode 100644
index 0000000..65d8154
--- /dev/null
+++ b/tests/drivers/hold_lsp_test.js
@@ -0,0 +1,54 @@
+// hold blocks in the language server: hover on hold, shared and a shared variable,
+// completion offers the keywords and marks shared variables, and a use outside the
+// block is a diagnostic. usage: node tests/drivers/hold_lsp_test.js path/to/zclsp
+const TIMEOUT_SCALE = Number(process.env.ZC_TEST_TIMEOUT_SCALE) || 1;
+const assert = require('assert');
+const cp = require('child_process');
+const server = process.argv[2];
+const uri = 'file:///hold.zc';
+const frame = m => { const body = Buffer.from(JSON.stringify(m)); return Buffer.concat([Buffer.from('Content-Length: ' + body.length + '\r\n\r\n'), body]); };
+function session(text, request) {
+    const messages = [
+        { jsonrpc: '2.0', id: 1, method: 'initialize', params: {} },
+        { jsonrpc: '2.0', method: 'textDocument/didOpen', params: { textDocument: { uri, version: 1, languageId: 'zc', text } } },
+    ];
+    if (request) messages.push(Object.assign({ jsonrpc: '2.0', id: 2 }, request));
+    messages.push({ jsonrpc: '2.0', method: 'exit' });
+    const result = cp.spawnSync(server, [], { input: Buffer.concat(messages.map(frame)), timeout: 15000 * TIMEOUT_SCALE, maxBuffer: 8 << 20 });
+    assert.strictEqual(result.status, 0, String(result.stderr));
+    const out = []; let data = result.stdout;
+    while (data.length) {
+        const end = data.indexOf('\r\n\r\n');
+        const count = Number(/Content-Length:\s*(\d+)/i.exec(data.subarray(0, end).toString())[1]);
+        out.push(JSON.parse(data.subarray(end + 4, end + 4 + count).toString()));
+        data = data.subarray(end + 4 + count);
+    }
+    return out;
+}
+function at(text, needle, nth = 0, delta = 0) {
+    let o = -1; for (let i = 0; i <= nth; i++) o = text.indexOf(needle, o + 1);
+    assert.ok(o >= 0, needle); o += delta;
+    const before = text.slice(0, o);
+    return { line: before.split('\n').length - 1, character: before.length - before.lastIndexOf('\n') - 1 };
+}
+const hover = (text, needle, nth) => { const r = session(text, { method: 'textDocument/hover', params: { textDocument: { uri }, position: at(text, needle, nth) } }).find(m => m.id === 2); return r && r.result && r.result.contents.value || ''; };
+const good = 'namespace;\ninclude rt;\nhold {\n    shared let count = 0;\n    fn inc() { count = count + 1; return count; }\n}\nfn main() { return inc(); }\n';
+let h = hover(good, 'hold');
+assert.ok(h.includes('monitor') && h.includes('lock'), 'hover on hold explains the block: ' + h);
+h = hover(good, 'shared');
+assert.ok(h.includes('every actor'), 'hover on shared: ' + h);
+h = hover(good, 'count', 1);
+assert.ok(h.includes('shared in hold block 1'), 'hover on a shared variable names its block: ' + h);
+const bad = 'namespace;\ninclude rt;\nhold { shared let count; fn inc() { count++; return count; } }\nfn main() { count = 2; return inc(); }\n';
+const diags = session(bad).filter(m => m.method === 'textDocument/publishDiagnostics').flatMap(m => m.params.diagnostics);
+assert.ok(diags.some(d => d.message.includes('count: is shared in a hold block') && d.range.start.line === 3), 'use outside the block is a diagnostic on its line: ' + JSON.stringify(diags));
+const partial = 'namespace;\ninclude rt;\nhold { shared let count; fn inc() { count++; return count; } }\nho\nfn main() { return inc(); }\n';
+let r = session(partial, { method: 'textDocument/completion', params: { textDocument: { uri }, position: at(partial, '\nho', 0, 3) } }).find(m => m.id === 2);
+let items = (r.result.items || r.result);
+assert.ok(items.some(i => i.label === 'hold'), 'completion offers hold');
+const partial2 = 'namespace;\ninclude rt;\nhold { shared let count; fn inc() { cou; return count; } }\nfn main() { return inc(); }\n';
+r = session(partial2, { method: 'textDocument/completion', params: { textDocument: { uri }, position: at(partial2, 'cou;', 0, 3) } }).find(m => m.id === 2);
+items = (r.result.items || r.result);
+const it = items.find(i => i.label === 'count');
+assert.ok(it && String(it.detail).startsWith('shared'), 'completion marks a shared variable: ' + JSON.stringify(it));
+console.log('hold lsp: 6 checks passed');