mirror of
https://github.com/Nexoniarz/Finch.git
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72e96a3f71
CI has failed since the embed merge (2026-10-25): - Linux: bootstrap/build.sh asks llvm-config for the folder with clang-c/Index.h - macOS: FINCH_LIBCLANG's -L folders also go to the compiler's own link "clang" - Windows: the language server turns file:///C:/x into C:/x and back (diagnostics went to /C:/x); the -g tests compare without \r; shared.sh (dlopen, -rdynamic) is not run there Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016GzNP6r8dg6WDxUVZy8wjL
214 lines
10 KiB
Python
Executable file
214 lines
10 KiB
Python
Executable file
#!/usr/bin/env python3
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"""Talks to `finch lsp` like an editor would and checks the answers."""
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import json, os, pathlib, subprocess, sys, tempfile
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FINCH = os.environ.get("FINCH", os.path.join(os.path.dirname(__file__), "..", "build", "finch"))
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failures = 0
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def check(name, cond, detail=""):
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global failures
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if cond:
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print("ok ", name)
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else:
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failures += 1
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print("FAIL", name, detail)
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class Client:
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def __init__(self):
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self.p = subprocess.Popen([FINCH, "lsp"], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
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self.next_id = 0
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self.notes = []
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def send(self, msg):
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body = json.dumps(msg).encode()
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self.p.stdin.write(b"Content-Length: %d\r\n\r\n" % len(body) + body)
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self.p.stdin.flush()
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def read(self):
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length = 0
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while True:
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line = self.p.stdout.readline().decode().strip()
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if not line:
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break
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if line.startswith("Content-Length:"):
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length = int(line.split(":")[1])
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return json.loads(self.p.stdout.read(length))
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def request(self, method, params):
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self.next_id += 1
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self.send({"jsonrpc": "2.0", "id": self.next_id, "method": method, "params": params})
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while True:
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m = self.read()
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if m.get("id") == self.next_id:
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return m.get("result")
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self.notes.append(m)
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def notify(self, method, params):
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self.send({"jsonrpc": "2.0", "method": method, "params": params})
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def diagnostics(self, uri):
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# the server publishes right after didOpen/didChange; a request flushes the order
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self.request("textDocument/hover", {"textDocument": {"uri": uri}, "position": {"line": 0, "character": 0}})
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found = [n for n in self.notes if n.get("method") == "textDocument/publishDiagnostics" and n["params"]["uri"] == uri]
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self.notes = []
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return found[-1]["params"]["diagnostics"] if found else None
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src = """struct Point {
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int x
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int y
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}
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fn add(int a, int b) -> int {
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return a + b
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}
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fn main() {
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p := Point(1, 2)
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total := add(p.x, p.y)
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names := ["a", "b"]
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print(total, names.len)
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}
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"""
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lines = src.split("\n")
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def pos(line_no, text): # 0-based position of `text` in a 1-based line
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return {"line": line_no - 1, "character": lines[line_no - 1].index(text)}
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d = tempfile.mkdtemp()
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path = os.path.join(d, "demo.fch")
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open(path, "w").write(src)
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uri = pathlib.Path(path).resolve().as_uri()
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td = {"uri": uri}
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c = Client()
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init = c.request("initialize", {"processId": None, "rootUri": None, "capabilities": {}})
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check("initialize", init["capabilities"]["hoverProvider"] is True)
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c.notify("initialized", {})
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c.notify("textDocument/didOpen", {"textDocument": {"uri": uri, "languageId": "finch", "version": 1, "text": src}})
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first = c.diagnostics(uri)
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check("no errors in a good file", first == [], first)
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h = c.request("textDocument/hover", {"textDocument": td, "position": pos(12, "total")})
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check("hover: variable type", h and "int total" in h["contents"]["value"], h)
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h = c.request("textDocument/hover", {"textDocument": td, "position": pos(12, "add")})
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check("hover: function signature", h and "fn add(int a, int b) -> int" in h["contents"]["value"], h)
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h = c.request("textDocument/hover", {"textDocument": td, "position": pos(14, "print")})
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check("hover: built-in docs", h and "Prints the values" in h["contents"]["value"], h)
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defn = c.request("textDocument/definition", {"textDocument": td, "position": pos(12, "add")})
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check("definition: function", defn and defn["range"]["start"]["line"] == 5, defn)
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defn = c.request("textDocument/definition", {"textDocument": td, "position": pos(12, "p.x")})
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check("definition: variable", defn and defn["range"]["start"]["line"] == 10, defn)
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# completion after "p." on a new line inside main
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edited = src.replace(" print(total, names.len)\n", " print(total, names.len)\n p.\n")
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 2}, "contentChanges": [{"text": edited}]})
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comp = c.request("textDocument/completion", {"textDocument": td, "position": {"line": 14, "character": 6}})
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labels = [i["label"] for i in comp["items"]]
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check("completion: struct fields after p.", "x" in labels and "y" in labels, labels)
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comp = c.request("textDocument/completion", {"textDocument": td, "position": {"line": 14, "character": 4}})
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labels = [i["label"] for i in comp["items"]]
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check("completion: variables, functions, keywords", all(x in labels for x in ["total", "names", "add", "Point", "while", "print"]), labels[:30])
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edited2 = src.replace(" print(total, names.len)\n", " print(total, names.len)\n names.\n")
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 3}, "contentChanges": [{"text": edited2}]})
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comp = c.request("textDocument/completion", {"textDocument": td, "position": {"line": 14, "character": 10}})
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labels = [i["label"] for i in comp["items"]]
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check("completion: array methods", "push" in labels and "sort" in labels, labels)
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sig_src = src.replace(" print(total, names.len)\n", " print(total, names.len)\n add(1, \n")
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 4}, "contentChanges": [{"text": sig_src}]})
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sig = c.request("textDocument/signatureHelp", {"textDocument": td, "position": {"line": 14, "character": 11}})
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check("signature help", sig and sig["signatures"][0]["label"].startswith("fn add") and sig["activeParameter"] == 1, sig)
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 5}, "contentChanges": [{"text": src}]})
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syms = c.request("textDocument/documentSymbol", {"textDocument": td})
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names = sorted(s["name"] for s in syms)
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check("document symbols", names == ["Point", "add", "main"], names)
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messy = "fn main() {\n x := 1 \n\n\n\tprint(x)\n}"
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 5}, "contentChanges": [{"text": messy}]})
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fm = c.request("textDocument/formatting", {"textDocument": td, "options": {"tabSize": 4, "insertSpaces": True}})
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check("formatting", fm and fm[0]["newText"] == "fn main() {\n x := 1\n\n print(x)\n}\n", fm)
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 5}, "contentChanges": [{"text": src}]})
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bad = src.replace("total := add(p.x, p.y)", 'total := add(p.x, "y")')
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 6}, "contentChanges": [{"text": bad}]})
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diags = c.diagnostics(uri)
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check("error shown while typing", diags and "must be int, but this is str" in diags[0]["message"] and diags[0]["range"]["start"]["line"] == 11, diags)
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 7}, "contentChanges": [{"text": src}]})
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check("error cleared after the fix", c.diagnostics(uri) == [])
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# methods, maps, errors as values
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src2 = """struct Counter {
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int count
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}
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fn Counter.add(int n) {
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self.count += n
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}
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fn parse(str s) -> int! {
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return int(s) or { return error("bad") }
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}
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fn main() {
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c := Counter(0)
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c.add(2)
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map[str]int m
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n := parse("4") or 0
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print(c, m, n)
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}
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"""
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lines2 = src2.split("\n")
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path2 = os.path.join(d, "more.fch")
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open(path2, "w").write(src2)
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uri2 = pathlib.Path(path2).resolve().as_uri()
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td2 = {"uri": uri2}
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c.notify("textDocument/didOpen", {"textDocument": {"uri": uri2, "languageId": "finch", "version": 1, "text": src2}})
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check("methods, maps and errors compile", c.diagnostics(uri2) == [])
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h = c.request("textDocument/hover", {"textDocument": td2, "position": {"line": 14, "character": lines2[14].index("add")}})
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check("hover: method signature", h and "fn Counter.add(int n)" in h["contents"]["value"], h)
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h = c.request("textDocument/hover", {"textDocument": td2, "position": {"line": 16, "character": lines2[16].index("parse")}})
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check("hover: fallible signature", h and "-> int!" in h["contents"]["value"], h)
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defn = c.request("textDocument/definition", {"textDocument": td2, "position": {"line": 14, "character": lines2[14].index("add")}})
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check("definition: method", defn and defn["range"]["start"]["line"] == 4, defn)
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for text, line, col, want, what in [
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(" c.\n", 18, 6, ["add", "count"], "completion: methods and fields after c."),
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(" m.\n", 18, 6, ["has", "get", "keys", "remove"], "completion: map methods"),
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]:
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e2 = src2.replace(" print(c, m, n)\n", " print(c, m, n)\n" + text)
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri2, "version": 2}, "contentChanges": [{"text": e2}]})
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comp = c.request("textDocument/completion", {"textDocument": td2, "position": {"line": line, "character": col}})
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labels = [i["label"] for i in comp["items"]]
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check(what, all(x in labels for x in want), labels)
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e2 = src2.replace(" print(c, m, n)\n", " print(c, m, n)\n c.add(\n")
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri2, "version": 3}, "contentChanges": [{"text": e2}]})
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sig = c.request("textDocument/signatureHelp", {"textDocument": td2, "position": {"line": 18, "character": 10}})
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check("signature help: method", sig and sig["signatures"][0]["label"].startswith("fn Counter.add"), sig)
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e2 = src2.replace('n := parse("4") or 0', 'n := parse("4")')
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri2, "version": 4}, "contentChanges": [{"text": e2}]})
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diags = c.diagnostics(uri2)
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check("error: unhandled failure", diags and "can fail" in diags[0]["message"], diags)
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# a module imported under another name: completion after its name
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src3 = "import path as pt\n\nfn main() {\n print(pt.base(\"a/b\"))\n}\n"
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path3 = os.path.join(d, "alias.fch")
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open(path3, "w").write(src3)
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uri3 = pathlib.Path(path3).resolve().as_uri()
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c.notify("textDocument/didOpen", {"textDocument": {"uri": uri3, "languageId": "finch", "version": 1, "text": src3}})
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check("import as: compiles", c.diagnostics(uri3) == [])
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e3 = src3.replace(" print(", " pt.\n print(")
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c.notify("textDocument/didChange", {"textDocument": {"uri": uri3, "version": 2}, "contentChanges": [{"text": e3}]})
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comp = c.request("textDocument/completion", {"textDocument": {"uri": uri3}, "position": {"line": 3, "character": 7}})
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labels = [i["label"] for i in comp["items"]]
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check("completion: a module under another name", "base" in labels and "join" in labels, labels)
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c.request("shutdown", None)
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c.notify("exit", None)
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c.p.wait(timeout=5)
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check("clean exit", c.p.returncode == 0, c.p.returncode)
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print("lsp:", "all ok" if failures == 0 else f"{failures} failed")
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sys.exit(1 if failures else 0)
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