Add tests for error handlers

Author: noteflakes

TODO.md

@@ -1,12 +1,5 @@
 ## Immediate
 
-- [ ] Testing
-  - [v] A module that exports a proc that takes 2 args, or maybe kwargs, how
-    does the system deal with that?
-  - [ ] middleware hook composition
-    - [ ] Scenario with multiple hooks on different levels
-  - [ ] error handler 
-    - [ ] Scenario with multiple error handlers on different levels
 - [ ] Controllers
   - [ ] Streamline names of ready-made control methods:
     - [ ] dispatch_by_host('.', mapping:) - currently `route_by_hosst`

test/fixtures/app_errors/_error.rb

@@ -0,0 +1,3 @@
+export ->(req, error) {
+  req.respond("root: #{error.message}", ':status' => Error.http_status(error))
+}

test/fixtures/app_errors/foo/_error.rb

@@ -0,0 +1,3 @@
+export ->(req, error) {
+  req.respond("foo: #{error.message}", ':status' => Error.http_status(error))
+}

test/fixtures/app_errors/foo/bar/_error.rb

@@ -0,0 +1,3 @@
+export ->(req, error) {
+  req.respond("bar: #{error.message}", ':status' => Error.http_status(error))
+}

test/fixtures/app_errors/foo/bar/baz/index.rb

@@ -0,0 +1,3 @@
+export ->(req) {
+  raise Error.teapot('baz')
+}

test/fixtures/app_errors/foo/bar/index.rb

@@ -0,0 +1,3 @@
+export ->(req) {
+  raise Error.teapot('bar')
+}

test/fixtures/app_errors/foo/index.rb

@@ -0,0 +1,3 @@
+export ->(req) {
+  raise Error.teapot('foo')
+}

test/fixtures/app_errors/index.rb

@@ -0,0 +1,3 @@
+export ->(req) {
+  raise Error.teapot('root')
+}

test/test_app.rb

@@ -188,7 +188,7 @@ def test_middleware_invocation_on_404
   end
 end
 
-class MiddlewareTest < Minitest::Test
+class MiddlewareHooksTest < Minitest::Test
   HTTP = Syntropy::HTTP
 
   APP_ROOT = File.join(__dir__, 'fixtures/app_hooks')
@@ -228,6 +228,46 @@ def test_middleware_composition
   end
 end
 
+class ErrorHandlerTest < Minitest::Test
+  HTTP = Syntropy::HTTP
+
+  APP_ROOT = File.join(__dir__, 'fixtures/app_errors')
+
+  def setup
+    @machine = UM.new
+
+    @tmp_path = '/test/tmp'
+    @tmp_fn = File.join(APP_ROOT, 'tmp.rb')
+
+    @app = Syntropy::App.new(
+      app_root: APP_ROOT,
+      mount_path: '/',
+      watch_files: 0.05,
+      machine: @machine
+    )
+
+    @test_harness = Syntropy::TestHarness.new(@app)
+  end
+
+  def test_error_handlers
+    req = @test_harness.request(':method' => 'GET', ':path' => '/')
+    assert_equal HTTP::TEAPOT, req.response_status
+    assert_equal 'root: root', req.response_body
+
+    req = @test_harness.request(':method' => 'GET', ':path' => '/foo')
+    assert_equal HTTP::TEAPOT, req.response_status
+    assert_equal 'foo: foo', req.response_body
+
+    req = @test_harness.request(':method' => 'GET', ':path' => '/foo/bar')
+    assert_equal HTTP::TEAPOT, req.response_status
+    assert_equal 'bar: bar', req.response_body
+
+    req = @test_harness.request(':method' => 'GET', ':path' => '/foo/bar/baz')
+    assert_equal HTTP::TEAPOT, req.response_status
+    assert_equal 'bar: baz', req.response_body
+  end
+end
+
 class CustomAppTest < Minitest::Test
   HTTP = Syntropy::HTTP