1 files changed, 80 insertions, 0 deletions
diff --git a/tests/Cepis.Tests/ConfigurationTests.cs b/tests/Cepis.Tests/ConfigurationTests.cs
new file mode 100644
index 0000000..2f6fab9
--- /dev/null
+++ b/tests/Cepis.Tests/ConfigurationTests.cs
@@ -0,0 +1,80 @@
+namespace Cepis.Tests;
+
+/// <summary>What the client accepts as configuration, and what it refuses.</summary>
+public sealed class ConfigurationTests : HttpTestBase
+{
+    [Fact]
+    public void TheDefaultsAreTheDocumentedOnes()
+    {
+        var options = new CepisClientOptions();
+
+        Assert.Equal(CepisClient.DefaultUrl, options.BaseUrl);
+        Assert.Equal(TimeSpan.FromSeconds(10), options.Timeout);
+        Assert.Equal(3, options.MaxAttempts);
+        Assert.Equal(TimeSpan.FromMilliseconds(500), options.BackoffBase);
+        Assert.Equal(TimeSpan.FromSeconds(8), options.BackoffMax);
+        Assert.Null(options.TotalTimeout);
+        Assert.Null(options.UserAgent);
+    }
+
+    [Fact]
+    public void TheDefaultUserAgentIdentifiesTheLibrary()
+    {
+        using var client = new CepisClient();
+
+        Assert.Equal($"cepis-csharp/{CepisClient.Version} (+https://cep.is)", client.UserAgent);
+    }
+
+    [Fact]
+    public async Task ATrailingSlashCannotDoubleTheSeparator()
+    {
+        using var client = new CepisClient(new CepisClientOptions { BaseUrl = Server.Url + "///" });
+        Server.Respond("/01001000", Reply.Of(200, Fixtures.SeAddress));
+
+        await client.LookupAsync("01001000");
+
+        Assert.Equal(Server.Url, client.BaseUrl);
+        Assert.Equal("/01001000", Assert.Single(Server.Calls).Path);
+    }
+
+    [Theory]
+    [InlineData(0)]
+    [InlineData(-1)]
+    public void MaxAttemptsBelowOneIsRefused(int attempts) =>
+        Assert.Throws<ArgumentException>(
+            () => new CepisClient(new CepisClientOptions { MaxAttempts = attempts }));
+
+    [Fact]
+    public void ATimeoutOfZeroIsRefused() =>
+        Assert.Throws<ArgumentException>(
+            () => new CepisClient(new CepisClientOptions { Timeout = TimeSpan.Zero }));
+
+    [Fact]
+    public void AnEmptyBaseUrlIsRefused() =>
+        Assert.Throws<ArgumentException>(
+            () => new CepisClient(new CepisClientOptions { BaseUrl = "  " }));
+
+    [Fact]
+    public void ATotalTimeoutOfZeroIsRefused() =>
+        Assert.Throws<ArgumentException>(
+            () => new CepisClient(new CepisClientOptions { TotalTimeout = TimeSpan.Zero }));
+
+    [Fact]
+    public async Task AnInjectedHttpClientIsUsedAndNotDisposed()
+    {
+        using var http = new HttpClient();
+        Server.Respond("/01001000", Reply.Of(200, Fixtures.SeAddress));
+
+        using (var client = new CepisClient(http, new CepisClientOptions { BaseUrl = Server.Url }))
+        {
+            await client.LookupAsync("01001000");
+        }
+
+        Assert.Equal(1, Server.Count("/01001000"));
+        await http.GetAsync(new Uri(Server.Url + "/01001000"));
+    }
+
+    [Fact]
+    public void TheSharedDefaultPointsAtTheRealApi() =>
+        Assert.Equal(CepisClient.DefaultUrl, CepisClient.Default.BaseUrl);
+}