zls/tests/language_features/cimport.zig

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const std = @import("std");
const zls = @import("zls");
const Ast = std.zig.Ast;
const translate_c = zls.translate_c;
const allocator: std.mem.Allocator = std.testing.allocator;
test "convertCInclude - empty" {
try testConvertCInclude("@cImport()", "");
try testConvertCInclude("@cImport({})", "");
try testConvertCInclude("@cImport({{}, {}})", "");
}
test "convertCInclude - cInclude" {
try testConvertCInclude(
\\@cImport(@cInclude("foo.zig"))
,
\\#include <foo.zig>
);
try testConvertCInclude(
\\@cImport(@cInclude("foo.zig"), @cInclude("bar.zig"))
,
\\#include <foo.zig>
\\#include <bar.zig>
);
}
test "translate_c - cDefine" {
try testConvertCInclude(
\\@cImport(@cDefine("FOO", "BAR"))
,
\\#define FOO BAR
);
try testConvertCInclude(
\\@cImport(@cDefine("FOO", {}))
,
\\#define FOO
);
}
test "translate_c - cUndef" {
try testConvertCInclude(
\\@cImport(@cUndef("FOO"))
,
\\#undef FOO
);
}
fn testConvertCInclude(cimport_source: []const u8, expected: []const u8) !void {
const source: [:0]u8 = try std.fmt.allocPrintZ(allocator, "const c = {s};", .{cimport_source});
defer allocator.free(source);
var ast = try Ast.parse(allocator, source, .zig);
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defer ast.deinit(allocator);
const main_tokens = ast.nodes.items(.main_token);
const node: Ast.Node.Index = blk: {
for (ast.nodes.items(.tag)) |tag, index| {
switch (tag) {
.builtin_call_two,
.builtin_call_two_comma,
.builtin_call,
.builtin_call_comma,
=> {},
else => continue,
}
if (!std.mem.eql(u8, ast.tokenSlice(main_tokens[index]), "@cImport")) continue;
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break :blk @intCast(Ast.Node.Index, index);
}
return error.TestUnexpectedResult; // source doesn't contain a cImport
};
const output = try translate_c.convertCInclude(allocator, ast, node);
defer allocator.free(output);
const trimmed_output = std.mem.trimRight(u8, output, &.{'\n'});
try std.testing.expectEqualStrings(expected, trimmed_output);
}