Initial project import

tools/v/vlib/context/value_test.v

@@ -0,0 +1,35 @@
+// vtest build: amd64 || arm64
+import context
+
+const not_found_value = &Value{
+	val: 'key not found'
+}
+
+struct Value {
+	val string
+}
+
+// This example demonstrates how a value can be passed to the context
+// and also how to retrieve it if it exists.
+fn test_with_value() {
+	f := fn (ctx context.Context, key context.Key) &Value {
+		if value := ctx.value(key) {
+			match value {
+				Value {
+					return value
+				}
+				else {}
+			}
+		}
+		return not_found_value
+	}
+
+	key := 'language'
+	value := &Value{
+		val: 'VAL'
+	}
+	ctx := context.with_value(context.background(), key, value)
+
+	assert value == f(ctx, key)
+	assert not_found_value == f(ctx, 'color')
+}