From 8c97ed43aecb9cc9ec2b6f667d700d65c866be4d Mon Sep 17 00:00:00 2001
From: jnyrup <jnyrup@gmail.com>
Date: Sun, 29 Dec 2019 15:45:09 +0100
Subject: [PATCH] Intercept Reflection exceptions from
 `AppSettingsConfigurationStore`

Some platforms throws reflection exceptions when trying to use `ConfigurationManager`.
This does not fix the underlying problem of not being unable to use `ConfigurationManager`, but returns `null` instead of an exception.

Relates to #1207 and #1151
---
 .../ConfigurationStoreExceptionInterceptor.cs | 36 +++++++++++++++++++
 Src/FluentAssertions/Common/Services.cs       |  2 +-
 2 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 Src/FluentAssertions/Common/ConfigurationStoreExceptionInterceptor.cs

diff --git a/Src/FluentAssertions/Common/ConfigurationStoreExceptionInterceptor.cs b/Src/FluentAssertions/Common/ConfigurationStoreExceptionInterceptor.cs
new file mode 100644
index 0000000000..484a5d9610
--- /dev/null
+++ b/Src/FluentAssertions/Common/ConfigurationStoreExceptionInterceptor.cs
@@ -0,0 +1,36 @@
+#if !NETSTANDARD1_3 && !NETSTANDARD1_6
+
+namespace FluentAssertions.Common
+{
+    internal class ConfigurationStoreExceptionInterceptor : IConfigurationStore
+    {
+        private bool throwsException;
+
+        private readonly IConfigurationStore configurationStore;
+
+        public ConfigurationStoreExceptionInterceptor(IConfigurationStore configurationStore)
+        {
+            this.configurationStore = configurationStore;
+        }
+
+        public string GetSetting(string name)
+        {
+            if (throwsException)
+            {
+                return null;
+            }
+
+            try
+            {
+                return configurationStore.GetSetting(name);
+            }
+            catch
+            {
+                throwsException = true;
+                return null;
+            }
+        }
+    }
+}
+
+#endif
diff --git a/Src/FluentAssertions/Common/Services.cs b/Src/FluentAssertions/Common/Services.cs
index cfc2f745dc..43351e1dec 100644
--- a/Src/FluentAssertions/Common/Services.cs
+++ b/Src/FluentAssertions/Common/Services.cs
@@ -48,7 +48,7 @@ public static void ResetToDefaults()
             ConfigurationStore = new NullConfigurationStore();
 #else
             Reflector = new FullFrameworkReflector();
-            ConfigurationStore = new AppSettingsConfigurationStore();
+            ConfigurationStore = new ConfigurationStoreExceptionInterceptor(new AppSettingsConfigurationStore());
 #endif
 
             ThrowException = TestFrameworkProvider.Throw;