Adding unit test for runtime spec

Signed-off-by: Navid Yaghoobi <navidys@fedoraproject.org>

Author: navidys

tests/image/define_os.zig

@@ -371,7 +371,7 @@ test "image define OS jsonParse" {
     // Other
     var osOther = std.json.Scanner.initCompleteInput(
         testing.allocator,
-        "\"unknown\"",
+        "\"other\"",
     );
 
     defer osOther.deinit();

tests/lib.zig

@@ -7,4 +7,5 @@ test {
     _ = @import("image/define_os.zig");
     _ = @import("image/define_arch.zig");
     _ = @import("image/define_media_type.zig");
+    _ = @import("runtime/config.zig");
 }

tests/runtime/config.zig

@@ -0,0 +1,22 @@
+const std = @import("std");
+const utils = @import("../utils.zig");
+const ocispec = @import("ocispec");
+const runtime = ocispec.runtime;
+const testing = std.testing;
+
+test "runtime config" {
+    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    defer arena.deinit();
+
+    const allocator = arena.allocator();
+
+    const ruuntimeFile = "runtime_spec.json";
+    const ruuntimeFile_path = try std.mem.concat(
+        allocator,
+        u8,
+        &.{ "./tests/fixtures/", ruuntimeFile },
+    );
+    const spec = try runtime.Spec.initFromFile(allocator, ruuntimeFile_path);
+
+    try testing.expectEqualStrings(spec.ociVersion, "0.5.0-dev");
+}