refactor: introduce eventide and rewrite server architecture (#355)

tests/unit/syntax/lexer_tests.cpp

@@ -0,0 +1,87 @@
+#include <cstddef>
+#include <vector>
+
+#include "test/test.h"
+#include "syntax/lexer.h"
+
+namespace clice::testing {
+namespace {
+TEST_SUITE(SourceText) {
+
+TEST_CASE(IgnoreComments) {
+    std::size_t count = 0;
+
+    std::vector<clang::tok::TokenKind> kinds = {
+        clang::tok::raw_identifier,
+        clang::tok::raw_identifier,
+        clang::tok::equal,
+        clang::tok::numeric_constant,
+        clang::tok::semi,
+    };
+
+    {
+        Lexer lexer("int x = 1; // comment", true);
+
+        while(true) {
+            Token token = lexer.advance();
+            if(token.is_eof()) {
+                break;
+            }
+
+            ASSERT_EQ(token.kind, kinds[count]);
+            count += 1;
+        }
+
+        ASSERT_EQ(count, 5);
+    }
+
+    count = 0;
+
+    kinds = {
+        clang::tok::raw_identifier,
+        clang::tok::raw_identifier,
+        clang::tok::equal,
+        clang::tok::numeric_constant,
+        clang::tok::semi,
+        clang::tok::comment,
+    };
+
+    {
+        Lexer lexer("int x = 1; // comment", false);
+
+        while(true) {
+            Token token = lexer.advance();
+            if(token.is_eof()) {
+                break;
+            }
+
+            ASSERT_EQ(token.kind, kinds[count]);
+            count += 1;
+        }
+
+        ASSERT_EQ(count, 6);
+    }
+}
+
+TEST_CASE(LexInclude) {
+    Lexer lexer(R"(
+#include <iostream>
+#include "gtest/test.h"
+module;
+int x = 1;
+)",
+                true,
+                nullptr,
+                false);
+
+    while(true) {
+        Token token = lexer.advance();
+        if(token.is_eof()) {
+            break;
+        }
+    }
+}
+
+};  // TEST_SUITE(SourceText)
+}  // namespace
+}  // namespace clice::testing