1 files changed, 32 insertions, 0 deletions
diff --git a/spec/support/matchers/be_valid_json.rb b/spec/support/matchers/be_valid_json.rb
new file mode 100644
index 00000000000..f46c35c7198
--- /dev/null
+++ b/spec/support/matchers/be_valid_json.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+RSpec::Matchers.define :be_valid_json do
+  def according_to_schema(schema)
+    @schema = schema
+    self
+  end
+
+  match do |actual|
+    data = Gitlab::Json.parse(actual)
+
+    if @schema.present?
+      @validation_errors = JSON::Validator.fully_validate(@schema, data)
+      @validation_errors.empty?
+    else
+      data.present?
+    end
+  rescue JSON::ParserError => e
+    @error = e
+    false
+  end
+
+  def failure_message
+    if @error
+      "Parse failed with error: #{@error}"
+    elsif @validation_errors.present?
+      "Validation failed because #{@validation_errors.join(', and ')}"
+    else
+      "Parsing did not return any data"
+    end
+  end
+end