End-to-end test to get, build, and use an external library

tests/deps/use-spdlog/gcc.tc.dds

@@ -0,0 +1,4 @@
+Compiler-ID: GNU
+C++-Version: C++17
+C++-Compiler: g++-8
+Flags: -D SPDLOG_COMPILED_LIB

tests/deps/use-spdlog/msvc.tc.dds

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+Compiler-ID: MSVC
+Flags: -D SPDLOG_COMPILED_LIB

tests/deps/use-spdlog/project/library.dds

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+Name: spdlog-user
+
+Uses: spdlog/spdlog

tests/deps/use-spdlog/project/package.dds

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+Name: test
+Version: 0.0.0
+
+Depends: spdlog 1.4.2

tests/deps/use-spdlog/project/remote.dds

@@ -0,0 +1 @@
+Remote-Package: spdlog 1.4.2; git url=https://github.com/gabime/spdlog.git ref=v1.4.2 auto=spdlog/spdlog

tests/deps/use-spdlog/project/src/spdlog_user.cpp

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+#include <spdlog/spdlog.h>
+
+int write_message() {
+    spdlog::warn("This is a message generated by spdlog in the spdlog-user test library");
+    return 42;
+}

tests/deps/use-spdlog/project/src/spdlog_user.hpp

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+#pragma once
+
+extern int write_message();

tests/deps/use-spdlog/project/src/use-spdlog.main.cpp

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+#include "./spdlog_user.hpp"
+
+#include <spdlog/spdlog.h>
+
+int main() {
+    auto result = ::write_message();
+    if (result != 42) {
+        spdlog::critical(
+            "The test library returned the wrong value (This is a REAL dds test failure, and is "
+            "very unexpected)");
+        return 1;
+    }
+    return 0;
+}

tests/deps/use-spdlog/use_spdlog_test.py

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+from tests import DDS
+
+from dds_ci import proc
+
+
+def test_get_build_use_spdlog(dds: DDS):
+    dds.deps_get()
+    tc_fname = 'gcc.tc.dds' if 'gcc' in dds.default_builtin_toolchain else 'msvc.tc.dds'
+    tc = str(dds.test_dir / tc_fname)
+    dds.deps_build(toolchain=tc)
+    dds.build(toolchain=tc, apps=True)
+    proc.check_run((dds.build_dir / 'use-spdlog').with_suffix(dds.exe_suffix))