add tests

Author: devm33

dotnet/test/SessionTests.cs

@@ -285,4 +285,19 @@ public async Task Should_Pass_Streaming_Option_To_Session_Creation()
         Assert.NotNull(assistantMessage);
         Assert.Contains("2", assistantMessage!.Data.Content);
     }
+
+    [Fact]
+    public async Task Should_Create_Session_With_Custom_Config_Dir()
+    {
+        var customConfigDir = Path.Combine(Ctx.HomeDir, "custom-config");
+        var session = await Client.CreateSessionAsync(new SessionConfig { ConfigDir = customConfigDir });
+
+        Assert.Matches(@"^[a-f0-9-]+$", session.SessionId);
+
+        // Session should work normally with custom config dir
+        await session.SendAsync(new MessageOptions { Prompt = "What is 1+1?" });
+        var assistantMessage = await TestHelper.GetFinalAssistantMessageAsync(session);
+        Assert.NotNull(assistantMessage);
+        Assert.Contains("2", assistantMessage!.Data.Content);
+    }
 }

go/e2e/session_test.go

@@ -614,6 +614,38 @@ func TestSession(t *testing.T) {
 			t.Errorf("Expected assistant message to contain '2', got %v", assistantMessage.Data.Content)
 		}
 	})
+
+	t.Run("should create session with custom config dir", func(t *testing.T) {
+		ctx.ConfigureForTest(t)
+
+		customConfigDir := ctx.HomeDir + "/custom-config"
+		session, err := client.CreateSession(&copilot.SessionConfig{
+			ConfigDir: customConfigDir,
+		})
+		if err != nil {
+			t.Fatalf("Failed to create session with custom config dir: %v", err)
+		}
+
+		matched, _ := regexp.MatchString(`^[a-f0-9-]+$`, session.SessionID)
+		if !matched {
+			t.Errorf("Expected session ID to match UUID pattern, got %q", session.SessionID)
+		}
+
+		// Session should work normally with custom config dir
+		_, err = session.Send(copilot.MessageOptions{Prompt: "What is 1+1?"})
+		if err != nil {
+			t.Fatalf("Failed to send message: %v", err)
+		}
+
+		assistantMessage, err := testharness.GetFinalAssistantMessage(session, 60*time.Second)
+		if err != nil {
+			t.Fatalf("Failed to get assistant message: %v", err)
+		}
+
+		if assistantMessage.Data.Content == nil || !strings.Contains(*assistantMessage.Data.Content, "2") {
+			t.Errorf("Expected assistant message to contain '2', got %v", assistantMessage.Data.Content)
+		}
+	})
 }
 
 func getSystemMessage(exchange testharness.ParsedHttpExchange) string {

nodejs/test/e2e/session.test.ts

@@ -299,6 +299,20 @@ describe("Sessions", async () => {
         const assistantMessage = await getFinalAssistantMessage(session);
         expect(assistantMessage.data.content).toContain("2");
     });
+
+    it("should create session with custom config dir", async () => {
+        const customConfigDir = `${homeDir}/custom-config`;
+        const session = await client.createSession({
+            configDir: customConfigDir,
+        });
+
+        expect(session.sessionId).toMatch(/^[a-f0-9-]+$/);
+
+        // Session should work normally with custom config dir
+        await session.send({ prompt: "What is 1+1?" });
+        const assistantMessage = await getFinalAssistantMessage(session);
+        expect(assistantMessage.data.content).toContain("2");
+    });
 });
 
 function getSystemMessage(exchange: ParsedHttpExchange): string | undefined {

python/e2e/test_session.py

@@ -326,6 +326,19 @@ async def test_should_pass_streaming_option_to_session_creation(self, ctx: E2ETe
         assistant_message = await get_final_assistant_message(session)
         assert "2" in assistant_message.data.content
 
+    async def test_should_create_session_with_custom_config_dir(self, ctx: E2ETestContext):
+        import os
+
+        custom_config_dir = os.path.join(ctx.home_dir, "custom-config")
+        session = await ctx.client.create_session({"config_dir": custom_config_dir})
+
+        assert session.session_id
+
+        # Session should work normally with custom config dir
+        await session.send({"prompt": "What is 1+1?"})
+        assistant_message = await get_final_assistant_message(session)
+        assert "2" in assistant_message.data.content
+
 
 def _get_system_message(exchange: dict) -> str:
     messages = exchange.get("request", {}).get("messages", [])

test/snapshots/session/should_create_session_with_custom_config_dir.yaml

@@ -0,0 +1,10 @@
+models:
+  - claude-sonnet-4.5
+conversations:
+  - messages:
+      - role: system
+        content: ${system}
+      - role: user
+        content: What is 1+1?
+      - role: assistant
+        content: 1 + 1 = 2