1 files changed, 48 insertions, 0 deletions
diff --git a/spec/support/helpers/file_read_helpers.rb b/spec/support/helpers/file_read_helpers.rb
new file mode 100644
index 00000000000..c30a9e6466f
--- /dev/null
+++ b/spec/support/helpers/file_read_helpers.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+module FileReadHelpers
+  def stub_file_read(file, content: nil, error: nil)
+    allow_original_file_read
+
+    expectation = allow(File).to receive(:read).with(file)
+
+    if error
+      expectation.and_raise(error)
+    elsif content
+      expectation.and_return(content)
+    else
+      expectation
+    end
+  end
+
+  def expect_file_read(file, content: nil, error: nil)
+    allow_original_file_read
+
+    expectation = expect(File).to receive(:read).with(file)
+
+    if error
+      expectation.and_raise(error)
+    elsif content
+      expectation.and_return(content)
+    else
+      expectation
+    end
+  end
+
+  def expect_file_not_to_read(file)
+    allow_original_file_read
+
+    expect(File).not_to receive(:read).with(file)
+  end
+
+  private
+
+  def allow_original_file_read
+    # Don't set this mock twice, otherwise subsequent calls will clobber
+    # previous mocks
+    return if @allow_original_file_read
+
+    @allow_original_file_read = true
+    allow(File).to receive(:read).and_call_original
+  end
+end