Better exception handling in StdioClientTransport (#444)

# Better exception handling in StdioClientTransport

Refactor `McpException` for improved handling with convenience
constructors and enhanced exception wrapping logic in
`StdioClientTransport`. Update tests to use `kotest` matchers and add
JUnit parameterized tests for exception handling.

## Motivation and Context
#442 follow up 

## How Has This Been Tested?
<!-- Have you tested this in a real application? Which scenarios were
tested? -->

## Breaking Changes
<!-- Will users need to update their code or configurations? -->

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
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-->
This commit is contained in:
Konstantin Pavlov 2025-12-04 15:09:54 +02:00 • committed by GitHub
commit 6ec6d3c52f
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@ -1,5 +1,7 @@
package io.modelcontextprotocol.kotlin.sdk.integration.kotlin
import io.kotest.assertions.withClue
import io.kotest.matchers.string.shouldContain
import io.modelcontextprotocol.kotlin.sdk.types.GetPromptRequest
import io.modelcontextprotocol.kotlin.sdk.types.GetPromptRequestParams
import io.modelcontextprotocol.kotlin.sdk.types.GetPromptResult
@ -391,7 +393,9 @@ abstract class AbstractPromptIntegrationTest : KotlinTestBase() {
}
}
assertTrue(exception.message.contains("requiredArg2"), "Exception should mention the missing argument")
withClue("Exception should mention the missing argument") {
exception.message shouldContain "requiredArg2"
}
// test with no args
val exception2 = assertThrows<McpException> {
@ -407,7 +411,9 @@ abstract class AbstractPromptIntegrationTest : KotlinTestBase() {
}
}
assertTrue(exception2.message.contains("requiredArg"), "Exception should mention a missing required argument")
withClue("Exception should mention a missing required argument") {
exception2.message shouldContain "requiredArg"
}
// test with all required args
val result = client.getPrompt(