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1 files changed, 43 insertions, 0 deletions

diff --git a/tests/drivers/core_lsp_test.js b/tests/drivers/core_lsp_test.js
new file mode 100644
index 0000000..41d0095
--- /dev/null
+++ b/tests/drivers/core_lsp_test.js
@@ -0,0 +1,43 @@
+// check maintained zc sources through the editor document protocol, one file at a time.
+const assert = require('assert');
+const fs = require('fs');
+const cp = require('child_process');
+const path = require('path');
+const target = process.argv[2];
+const files = ['src/runtime/rt.zc', 'src/compiler/compiler.zc', 'src/runtime/run.zc', 'src/lib/std.zc', 'src/lsp/server.zc', 'src/tools/build.zc'];
+const frame = message => {
+    const body = Buffer.from(JSON.stringify(message));
+    return Buffer.concat([Buffer.from('Content-Length: ' + body.length + '\r\n\r\n'), body]);
+};
+for (const file of files) {
+    const uri = 'file://' + path.resolve(file);
+    const text = fs.readFileSync(file, 'utf8');
+    const messages = [
+        { jsonrpc: '2.0', id: 1, method: 'initialize', params: {} },
+        { jsonrpc: '2.0', method: 'initialized', params: {} },
+        { jsonrpc: '2.0', method: 'textDocument/didOpen', params: { textDocument: { uri, version: 1, languageId: 'zc', text } } },
+        { jsonrpc: '2.0', id: 2, method: 'textDocument/semanticTokens/full', params: { textDocument: { uri } } },
+        { jsonrpc: '2.0', method: 'textDocument/didChange', params: { textDocument: { uri, version: 2 }, contentChanges: [{ text: text + '\n' }] } },
+        { jsonrpc: '2.0', method: 'textDocument/didClose', params: { textDocument: { uri } } },
+        { jsonrpc: '2.0', id: 3, method: 'shutdown', params: null },
+        { jsonrpc: '2.0', method: 'exit' },
+    ];
+    const result = cp.spawnSync(target, [], { input: Buffer.concat(messages.map(frame)), timeout: 30000, maxBuffer: 32 << 20 });
+    assert.strictEqual(result.status, 0, file + ': ' + result.stderr);
+    let data = result.stdout;
+    const replies = [];
+    while (data.length) {
+        const end = data.indexOf('\r\n\r\n');
+        assert.ok(end >= 0, 'complete protocol header');
+        const length = Number(/Content-Length:\s*(\d+)/i.exec(data.subarray(0, end).toString())[1]);
+        replies.push(JSON.parse(data.subarray(end + 4, end + 4 + length)));
+        data = data.subarray(end + 4 + length);
+    }
+    const diagnostics = replies.filter(m => m.method === 'textDocument/publishDiagnostics');
+    assert.strictEqual(diagnostics.length, 3, file + ': open, change, and close publish diagnostics');
+    const errors = diagnostics.flatMap(m => m.params.diagnostics).filter(d => d.severity === 1);
+    assert.deepStrictEqual(errors, [], file + ': ' + errors.map(d => (d.range.start.line + 1) + ': ' + d.message).join('\n'));
+    assert.ok(replies.find(m => m.id === 2).result.data.length, file + ': semantic tokens are available');
+    assert.deepStrictEqual(diagnostics[2].params.diagnostics, [], 'close clears diagnostics');
+    console.log('ok   editor open, highlight, change, and close: ' + file);
+}